)]}' { "log": [ { "commit": "1434b65731963207a4cc84bd87e6191e34321986", "tree": "07f58551b451675c2f85ebe88e5feb8971577d78", "parents": [ "4934ed888e6fe78d9d339471fb870819da911e8b", "76994412f8e824e79a593d6777ec327d85f942b2" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon May 26 10:21:26 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon May 26 10:21:26 2008 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6:\n slub: ksize() abuse checks\n slob: Fix to return wrong pointer\n" }, { "commit": "cd94b9dbfa300fc42e45f230010623fc08d59563", "tree": "ad9581e94a635032d74d3905975ebd4c39bed5f2", "parents": [ "7eb54824b76793dd86afb54f182ef9aa64b3a45a" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Fri May 23 13:04:52 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat May 24 09:56:12 2008 -0700" }, "message": "memory hotplug: fix early allocation handling\n\nTrying to add memory via add_memory() from within an initcall function\nresults in\n\nbootmem alloc of 163840 bytes failed!\nKernel panic - not syncing: Out of memory\n\nThis is caused by zone_wait_table_init() which uses system_state to decide\nif it should use the bootmem allocator or not.\n\nWhen initcalls are handled the system_state is still SYSTEM_BOOTING but\nthe bootmem allocator doesn\u0027t work anymore. So the allocation will fail.\n\nTo fix this use slab_is_available() instead as indicator like we do it\neverywhere else.\n\n[akpm@linux-foundation.org: coding-style fix]\nReviewed-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: Gerald Schaefer \u003cgerald.schaefer@de.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7eb54824b76793dd86afb54f182ef9aa64b3a45a", "tree": "400753c14099e9ecbba9ab4665b4c1badd180839", "parents": [ "03a74dcc7eebe6edd778317e82fafdf71e68488c" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Fri May 23 13:04:50 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat May 24 09:56:11 2008 -0700" }, "message": "zonelists: handle a node zonelist with no applicable entries\n\nWhen booting 2.6.26-rc3 on a multi-node x86_32 numa system we are seeing\npanics when trying node local allocations:\n\n BUG: unable to handle kernel NULL pointer dereference at 0000034c\n IP: [\u003cc1042507\u003e] get_page_from_freelist+0x4a/0x18e\n *pdpt \u003d 00000000013a7001 *pde \u003d 0000000000000000\n Oops: 0000 [#1] SMP\n Modules linked in:\n\n Pid: 0, comm: swapper Not tainted (2.6.26-rc3-00003-g5abc28d #82)\n EIP: 0060:[\u003cc1042507\u003e] EFLAGS: 00010282 CPU: 0\n EIP is at get_page_from_freelist+0x4a/0x18e\n EAX: c1371ed8 EBX: 00000000 ECX: 00000000 EDX: 00000000\n ESI: f7801180 EDI: 00000000 EBP: 00000000 ESP: c1371ec0\n DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068\n Process swapper (pid: 0, ti\u003dc1370000 task\u003dc12f5b40 task.ti\u003dc1370000)\n Stack: 00000000 00000000 00000000 00000000 000612d0 000412d0 00000000 000412d0\n f7801180 f7c0101c f7c01018 c10426e4 f7c01018 00000001 00000044 00000000\n 00000001 c12f5b40 00000001 00000010 00000000 000412d0 00000286 000412d0\n Call Trace:\n [\u003cc10426e4\u003e] __alloc_pages_internal+0x99/0x378\n [\u003cc10429ca\u003e] __alloc_pages+0x7/0x9\n [\u003cc105e0e8\u003e] kmem_getpages+0x66/0xef\n [\u003cc105ec55\u003e] cache_grow+0x8f/0x123\n [\u003cc105f117\u003e] ____cache_alloc_node+0xb9/0xe4\n [\u003cc105f427\u003e] kmem_cache_alloc_node+0x92/0xd2\n [\u003cc122118c\u003e] setup_cpu_cache+0xaf/0x177\n [\u003cc105e6ca\u003e] kmem_cache_create+0x2c8/0x353\n [\u003cc13853af\u003e] kmem_cache_init+0x1ce/0x3ad\n [\u003cc13755c5\u003e] start_kernel+0x178/0x1ee\n\nThis occurs when we are scanning the zonelists looking for a ZONE_NORMAL\npage. In this system there is only ZONE_DMA and ZONE_NORMAL memory on\nnode 0, all other nodes are mapped above 4GB physical. Here is a dump\nof the zonelists from this system:\n\n zonelists pgdat\u003dc1400000\n 0: c14006c0:2 f7c006c0:2 f7e006c0:2 c1400360:1 c1400000:0\n 1: c14006c0:2 c1400360:1 c1400000:0\n zonelists pgdat\u003df7c00000\n 0: f7c006c0:2 f7e006c0:2 c14006c0:2 c1400360:1 c1400000:0\n 1: f7c006c0:2\n zonelists pgdat\u003df7e00000\n 0: f7e006c0:2 c14006c0:2 f7c006c0:2 c1400360:1 c1400000:0\n 1: f7e006c0:2\n\nWhen performing a node local allocation we call get_page_from_freelist()\nlooking for a page. It in turn calls first_zones_zonelist() which returns\na preferred_zone. Where there are no applicable zones this will be NULL.\nHowever we use this unconditionally, leading to this panic.\n\nWhere there are no applicable zones there is no possibility of a successful\nallocation, so simply fail the allocation.\n\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "80119ef5c8153e0a6cc5edf00c083dc98a9bd348", "tree": "a2af11a3991b1bebe9d764ab6d4d28891e86eda2", "parents": [ "6c7c6afbb8c0e60d32a563cae7c6889211e9d9d8" ], "author": { "name": "Alan Cox", "email": "alan@redhat.com", "time": "Fri May 23 13:04:31 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat May 24 09:56:09 2008 -0700" }, "message": "mm: fix atomic_t overflow in vm\n\nThe atomic_t type is 32bit but a 64bit system can have more than 2^32\npages of virtual address space available. Without this we overflow on\nludicrously large mappings\n\nSigned-off-by: Alan Cox \u003calan@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f7232154198f928fc25f420d6190468212a7632a", "tree": "3216938f94face00fd6c6094bc8ccb66c2ef3619", "parents": [ "f899b0adc6fc8f60a9db8b52f36f06fd1abeaf7c" ], "author": { "name": "Johannes Weiner", "email": "hannes@saeurebad.de", "time": "Fri May 23 13:04:21 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat May 24 09:56:07 2008 -0700" }, "message": "mm: don\u0027t drop a partial page in a zone\u0027s memory map size\n\nIn a zone\u0027s present pages number, account for all pages occupied by the\nmemory map, including a partial.\n\nSigned-off-by: Johannes Weiner \u003channes@saeurebad.de\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "42172d751b4596b8ca4346a1c251b5f1c661ab0c", "tree": "f9149aee9349c43bd8e253b407acae920e041d00", "parents": [ "c2448278e3be3a43fe0343e138444742af1e99ae" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Fri May 23 13:04:18 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat May 24 09:56:07 2008 -0700" }, "message": "mm: allow pfnmap -\u003efault()s\n\nTake out an assertion to allow -\u003efault handlers to service PFNMAP regions.\nThis is required to reimplement .nopfn handlers with .fault handlers and\nsubsequently remove nopfn.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nAcked-by: Jes Sorensen \u003cjes@sgi.com\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "76994412f8e824e79a593d6777ec327d85f942b2", "tree": "9acd5883a43daf1bf21ab23608915c1181fd2008", "parents": [ "239f49c0800778c863585a103805c58afbad6748" ], "author": { "name": "Pekka Enberg", "email": "penberg@cs.helsinki.fi", "time": "Thu May 22 19:22:25 2008 +0300" }, "committer": { "name": "Pekka Enberg", "email": "penberg@cs.helsinki.fi", "time": "Thu May 22 19:52:18 2008 +0300" }, "message": "slub: ksize() abuse checks\n\nAdd a WARN_ON for pages that don\u0027t have PageSlab nor PageCompound set to catch\nthe worst abusers of ksize() in the kernel.\n\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\n" }, { "commit": "19051c5035d217e572672a2ca9db06c1cef50e9b", "tree": "9fef0047e070c977463a85d5cbd0f9479694d286", "parents": [ "8882b39421bae317e3ee864edd845e994307ce16" ], "author": { "name": "Greg Kroah-Hartman", "email": "gregkh@suse.de", "time": "Thu May 15 13:44:08 2008 -0700" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@suse.de", "time": "Tue May 20 13:31:53 2008 -0700" }, "message": "mm: bdi: fix race in bdi_class device creation\n\nThere is a race from when a device is created with device_create() and\nthen the drvdata is set with a call to dev_set_drvdata() in which a\nsysfs file could be open, yet the drvdata will be NULL, causing all\nsorts of bad things to happen.\n\nThis patch fixes the problem by using the new function,\ndevice_create_vargs().\n\nMany thanks to Arthur Jones \u003cajones@riverbed.com\u003e for reporting the bug,\nand testing patches out.\n\nCc: Kay Sievers \u003ckay.sievers@vrfy.org\u003e\nCc: Arthur Jones \u003cajones@riverbed.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\n\n" }, { "commit": "239f49c0800778c863585a103805c58afbad6748", "tree": "bc49ae2d4405b4431e6e7463b3eac52245793a02", "parents": [ "f26a3988917913b3d11b2bd741601a2c64ab9204" ], "author": { "name": "MinChan Kim", "email": "minchan.kim@gmail.com", "time": "Mon May 19 22:12:08 2008 +0900" }, "committer": { "name": "Pekka Enberg", "email": "penberg@cs.helsinki.fi", "time": "Mon May 19 20:55:25 2008 +0300" }, "message": "slob: Fix to return wrong pointer\n\nAlthough slob_alloc return NULL, __kmalloc_node returns NULL + align.\nBecause align always can be changed, it is very hard for debugging\nproblem of no page if it don\u0027t return NULL.\n\nWe have to return NULL in case of no page.\n\n[penberg@cs.helsinki.fi: fix formatting as suggested by Matt.]\nAcked-by: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: MinChan Kim \u003cminchan.kim@gmail.com\u003e\nSigned-off-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\n" }, { "commit": "76cdd58e558669366adfaded436fda01b30cce3e", "tree": "deaccb499752c928919693edea65f9ea4c1fe756", "parents": [ "1c12c4cf9411eb130b245fa8d0fbbaf989477c7b" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed May 14 16:05:52 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed May 14 19:11:15 2008 -0700" }, "message": "memory_hotplug: always initialize pageblock bitmap\n\nTrying to online a new memory section that was added via memory hotplug\nsometimes results in crashes when the new pages are added via __free_page.\n Reason for that is that the pageblock bitmap isn\u0027t initialized and hence\ncontains random stuff. That means that get_pageblock_migratetype()\nreturns also random stuff and therefore\n\n\tlist_add(\u0026page-\u003elru,\n\t\t\u0026zone-\u003efree_area[order].free_list[migratetype]);\n\nin __free_one_page() tries to do a list_add to something that isn\u0027t even\nnecessarily a list.\n\nThis happens since 86051ca5eaf5e560113ec7673462804c54284456 (\"mm: fix\nusemap initialization\") which makes sure that the pageblock bitmap gets\nonly initialized for pages present in a zone. Unfortunately for hot-added\nmemory the zones \"grow\" after the memmap and the pageblock memmap have\nbeen initialized. Which means that the new pages have an unitialized\nbitmap. To solve this the calls to grow_zone_span() and grow_pgdat_span()\nare moved to __add_zone() just before the initialization happens.\n\nThe patch also moves the two functions since __add_zone() is the only\ncaller and I didn\u0027t want to add a forward declaration.\n\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nCc: Andy Whitcroft \u003capw@shadowen.org\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: Gerald Schaefer \u003cgerald.schaefer@de.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1c12c4cf9411eb130b245fa8d0fbbaf989477c7b", "tree": "f61d58e955b3159007ef77513c1c4f1ed2c9ec23", "parents": [ "44c81433e8b05dbc85985d939046f10f95901184" ], "author": { "name": "Venki Pallipadi", "email": "venkatesh.pallipadi@intel.com", "time": "Wed May 14 16:05:51 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed May 14 19:11:15 2008 -0700" }, "message": "mprotect: prevent alteration of the PAT bits\n\nThere is a defect in mprotect, which lets the user change the page cache\ntype bits by-passing the kernel reserve_memtype and free_memtype\nwrappers. Fix the problem by not letting mprotect change the PAT bits.\n\nSigned-off-by: Venkatesh Pallipadi \u003cvenkatesh.pallipadi@intel.com\u003e\nSigned-off-by: Suresh Siddha \u003csuresh.b.siddha@intel.com\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "fd8a4221ad76df700ff34875c9fbc42302aa4ba3", "tree": "4f37586cef40dca7cc8b630e85965a698e3aa1be", "parents": [ "3fc957721d18c93662f7d4dab455b80f53dd2641" ], "author": { "name": "Geoff Levand", "email": "geoffrey.levand@am.sony.com", "time": "Wed May 14 16:05:50 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed May 14 19:11:14 2008 -0700" }, "message": "memory_hotplug: check for walk_memory_resource() failure in online_pages()\n\nAdd a check to online_pages() to test for failure of\nwalk_memory_resource(). This fixes a condition where a failure\nof walk_memory_resource() can lead to online_pages() returning\nsuccess without the requested pages being onlined.\n\nSigned-off-by: Geoff Levand \u003cgeoffrey.levand@am.sony.com\u003e\nCc: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: Keith Mannthey \u003ckmannth@us.ibm.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c3723ca3874a8fc2218c4726d57e3a7da9e83e47", "tree": "d7aa49e6ce3d10bcab1a79e3045425dad6906c40", "parents": [ "3b7ec117bf6c98f5a845311c4ca5ca020a3d7689" ], "author": { "name": "Heiko Carstens", "email": "heiko.carstens@de.ibm.com", "time": "Wed May 14 16:05:40 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed May 14 19:11:14 2008 -0700" }, "message": "memory hotplug: memmap_init_zone called twice\n\n__add_zone calls memmap_init_zone twice if memory gets attached to an empty\nzone. Once via init_currently_empty_zone and once explictly right after that\ncall.\n\nLooks like this is currently not a bug, however the call is superfluous and\nmight lead to subtle bugs if memmap_init_zone gets changed. So make sure it\nis called only once.\n\nCc: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3ef0f720e47e895b613b0305eb0a483e3ec11f23", "tree": "e696a950d76c90199661515e1068fc00102a15bf", "parents": [ "3b73a223661ed137c5d3d2635f954382e94f5a43" ], "author": { "name": "Miklos Szeredi", "email": "mszeredi@suse.cz", "time": "Wed May 14 16:05:37 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed May 14 19:11:13 2008 -0700" }, "message": "mm: fix infinite loop in filemap_fault\n\nfilemap_fault will go into an infinite loop if -\u003ereadpage() fails\nasynchronously.\n\nAFAICS the bug was introduced by this commit, which removed the wait after the\nfinal readpage:\n\n commit d00806b183152af6d24f46f0c33f14162ca1262a\n Author: Nick Piggin \u003cnpiggin@suse.de\u003e\n Date: Thu Jul 19 01:46:57 2007 -0700\n\n mm: fix fault vs invalidate race for linear mappings\n\nFix by reintroducing the wait_on_page_locked() after -\u003ereadpage() to make sure\nthe page is up-to-date before jumping back to the beginning of the function.\n\nI\u0027ve noticed this while testing nfs exporting on fuse. The patch\nfixes it.\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "362a61ad61199e19a61b8e432015e2586b288f5b", "tree": "b766e454928eea0db1ec6e301340c27ef5f5244f", "parents": [ "73f10281ea96d7e8b4fc1c5d755a7c8eb484155b" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Wed May 14 06:37:36 2008 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed May 14 10:05:18 2008 -0700" }, "message": "fix SMP data race in pagetable setup vs walking\n\nThere is a possible data race in the page table walking code. After the split\nptlock patches, it actually seems to have been introduced to the core code, but\neven before that I think it would have impacted some architectures (powerpc\nand sparc64, at least, walk the page tables without taking locks eg. see\nfind_linux_pte()).\n\nThe race is as follows:\nThe pte page is allocated, zeroed, and its struct page gets its spinlock\ninitialized. The mm-wide ptl is then taken, and then the pte page is inserted\ninto the pagetables.\n\nAt this point, the spinlock is not guaranteed to have ordered the previous\nstores to initialize the pte page with the subsequent store to put it in the\npage tables. So another Linux page table walker might be walking down (without\nany locks, because we have split-leaf-ptls), and find that new pte we\u0027ve\ninserted. It might try to take the spinlock before the store from the other\nCPU initializes it. And subsequently it might read a pte_t out before stores\nfrom the other CPU have cleared the memory.\n\nThere are also similar races in higher levels of the page tables. They\nobviously don\u0027t involve the spinlock, but could see uninitialized memory.\n\nArch code and hardware pagetable walkers that walk the pagetables without\nlocks could see similar uninitialized memory problems, regardless of whether\nsplit ptes are enabled or not.\n\nI prefer to put the barriers in core code, because that\u0027s where the higher\nlevel logic happens, but the page table accessors are per-arch, and open-coding\nthem everywhere I don\u0027t think is an option. I\u0027ll put the read-side barriers\nin alpha arch code for now (other architectures perform data-dependent loads\nin order).\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5aecd559871d23a3cc297e544c9d63f0b8441cf4", "tree": "490290335041770d190ad2acab7c1e4570efc36c", "parents": [ "241937b863c8a3ef10511712f53285f41ab05308" ], "author": { "name": "Denis Cheng", "email": "crquan@gmail.com", "time": "Mon May 12 14:02:14 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 13 08:02:24 2008 -0700" }, "message": "mm/pdflush.c: merge the same code in two path\n\nSigned-off-by: Denis Cheng \u003ccrquan@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b5be11329f8cb2cc1a4c3b33b6b8d096c6012895", "tree": "30ccea8a490bbde0e0760274b6eb4c5863971caa", "parents": [ "78f508ab07954d12896097ac07ab2fab443c7ca2" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon May 12 14:02:06 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 13 08:02:23 2008 -0700" }, "message": "make vmstat cpu-unplug safe\n\nWhen accessing cpu_online_map, we should prevent dynamic changing\nof cpu_online_map by get_online_cpus().\n\nUnfortunately, all_vm_events() doesn\u0027t do that.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Gautham R Shenoy \u003cego@in.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7a34912d90c17a90d9fad12c4c51833b4e70707b", "tree": "a3811697f5eba3c5d12216ac76f681420046b219", "parents": [ "0f1bce41fed02e45f31c2409f29e69e1fedebcdc", "75065ff619e42fe35178eda863cbcddd57776794" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 08 10:48:36 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 08 10:48:36 2008 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.dk/linux-2.6-block\n\n* \u0027for-linus\u0027 of git://git.kernel.dk/linux-2.6-block:\n Revert \"relay: fix splice problem\"\n docbook: fix bio missing parameter\n block: use unitialized_var() in bio_alloc_bioset()\n block: avoid duplicate calls to get_part() in disk stat code\n cfq-iosched: make io priorities inherit CPU scheduling class as well as nice\n block: optimize generic_unplug_device()\n block: get rid of likely/unlikely predictions in merge logic\n vfs: splice remove_suid() cleanup\n cfq-iosched: fix RCU race in the cfq io_context destructor handling\n block: adjust tagging function queue bit locking\n block: sysfs store function needs to grab queue_lock and use queue_flag_*()\n" }, { "commit": "4ea33e2dc2dab10960877e1649ee527c033f42c0", "tree": "5e66cd116868336d7a0fa3e6da38ebbf3e8d5a32", "parents": [ "ba719baeabbff5476eeb91c223e6921ba29e1490" ], "author": { "name": "Benjamin Herrenschmidt", "email": "benh@kernel.crashing.org", "time": "Tue May 06 20:42:39 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 08 10:46:56 2008 -0700" }, "message": "slub: fix atomic usage in any_slab_objects()\n\nany_slab_objects() does an atomic_read on an atomic_long_t, this\nfixes it to use atomic_long_read instead.\n\nSigned-off-by: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7f3d4ee108c184ab215036051087aaaaa8de7661", "tree": "373f4f928f0687ca84478964b43c26e3ec9cec70", "parents": [ "07416d29bcf608257f1e5280642dcbe0021518a3" ], "author": { "name": "Miklos Szeredi", "email": "mszeredi@suse.cz", "time": "Wed May 07 09:22:39 2008 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Wed May 07 09:29:00 2008 +0200" }, "message": "vfs: splice remove_suid() cleanup\n\ngeneric_file_splice_write() duplicates remove_suid() just because it\ndoesn\u0027t hold i_mutex. But it grabs i_mutex inside splice_from_pipe()\nanyway, so this is rather pointless.\n\nMove locking to generic_file_splice_write() and call remove_suid() and\n__splice_from_pipe() instead.\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "aeed5fce37196e09b4dac3a1c00d8b7122e040ce", "tree": "d16a8f824ad06ac5dea6052f1986165a0d7fc865", "parents": [ "bb78be8397d3b0900af3d717672218ee3ea07985" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Tue May 06 20:49:23 2008 +0100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue May 06 13:08:58 2008 -0700" }, "message": "x86: fix PAE pmd_bad bootup warning\n\nFix warning from pmd_bad() at bootup on a HIGHMEM64G HIGHPTE x86_32.\n\nThat came from 9fc34113f6880b215cbea4e7017fc818700384c2 x86: debug pmd_bad();\nbut we understand now that the typecasting was wrong for PAE in the previous\nversion: pagetable pages above 4GB looked bad and stopped Arjan from booting.\n\nAnd revert that cded932b75ab0a5f9181ee3da34a0a488d1a14fd x86: fix pmd_bad\nand pud_bad to support huge pages. It was the wrong way round: we shouldn\u0027t\nweaken every pmd_bad and pud_bad check to let huge pages slip through - in\npart they check that we _don\u0027t_ have a huge page where it\u0027s not expected.\n\nPut the x86 pmd_bad() and pud_bad() definitions back to what they have long\nbeen: they can be improved (x86_32 should use PTE_MASK, to stop PAE thinking\njunk in the upper word is good; and x86_64 should follow x86_32\u0027s stricter\ncomparison, to stop thinking any subset of required bits is good); but that\nshould be a later patch.\n\nFix Hans\u0027 good observation that follow_page() will never find pmd_huge()\nbecause that would have already failed the pmd_bad test: test pmd_huge in\nbetween the pmd_none and pmd_bad tests. Tighten x86\u0027s pmd_huge() check?\nNo, once it\u0027s a hugepage entry, it can get quite far from a good pmd: for\nexample, PROT_NONE leaves it with only ACCESSED of the KERN_PGTABLE bits.\n\nHowever... though follow_page() contains this and another test for huge\npages, so it\u0027s nice to keep it working on them, where does it actually get\ncalled on a huge page? get_user_pages() checks is_vm_hugetlb_page(vma) to\nto call alternative hugetlb processing, as does unmap_vmas() and others.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nEarlier-version-tested-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Jeff Chua \u003cjeff.chua.linux@gmail.com\u003e\nCc: Hans Rosenfeld \u003chans.rosenfeld@amd.com\u003e\nCc: Arjan van de Ven \u003carjan@linux.intel.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f6acb63508700b5f8cd817082b62c96ba907775e", "tree": "0fc0cdd4660fdf186f3becc1b80d743f8d3edbea", "parents": [ "f715e6f15ee167026581a8a2e09b2ed644b974aa" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Tue Apr 29 16:16:06 2008 -0700" }, "committer": { "name": "Pekka Enberg", "email": "penberg@cs.helsinki.fi", "time": "Fri May 02 00:27:13 2008 +0300" }, "message": "slub: #ifdef simplification\n\nIf we make SLUB_DEBUG depend on SYSFS then we can simplify some\n#ifdefs and avoid others.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\n" }, { "commit": "0121c619d03820d965745e56f80f6eb5994533fe", "tree": "75ecdc5dee9c3a6bb64ee095f51cc831be2cd475", "parents": [ "886c35fbcf6fb2eee15687efc2d64d99b6ad9a4a" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Tue Apr 29 16:11:12 2008 -0700" }, "committer": { "name": "Pekka Enberg", "email": "penberg@cs.helsinki.fi", "time": "Fri May 02 00:26:31 2008 +0300" }, "message": "slub: Whitespace cleanup and use of strict_strtoul\n\nFix some issues with wrapping and use strict_strtoul to make parameter\npassing from sysfs safer.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\n" }, { "commit": "55e462b05b5df4fd113c4a304c4f487d44b0898e", "tree": "0d538695cc0611395666194a6326b3ad424a9dc7", "parents": [ "f39e578172f30d3bdd4533465c7ec00db738eb9d" ], "author": { "name": "Balaji Rao", "email": "balajirrao@gmail.com", "time": "Thu May 01 04:35:12 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 01 08:04:02 2008 -0700" }, "message": "memcg: simple stats for memory resource controller\n\nImplement trivial statistics for the memory resource controller.\n\nSigned-off-by: Balaji Rao \u003cbalajirrao@gmail.com\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Dhaval Giani \u003cdhaval@linux.vnet.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c85d194bfd2e36c5254b8058c1f35cfce0dfa10a", "tree": "63c3862e412c4741bf6661f8dc70e91371aea875", "parents": [ "5045790589bd426b5d515d78fa71f0fc92dd4e83" ], "author": { "name": "Randy Dunlap", "email": "randy.dunlap@oracle.com", "time": "Thu May 01 04:34:48 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 01 08:03:59 2008 -0700" }, "message": "docbook: fix vmalloc missing parameter notation\n\nFix vmalloc kernel-doc warning:\n\nWarning(linux-2.6.25-git14//mm/vmalloc.c:555): No description found for parameter \u0027caller\u0027\n\nSigned-off-by: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f8bd2258e2d520dff28c855658bd24bdafb5102d", "tree": "d76db1dc858cb316bc7d5b8473f690a753fd2c93", "parents": [ "6f6d6a1a6a1336431a6cba60ace9e97c3a496a19" ], "author": { "name": "Roman Zippel", "email": "zippel@linux-m68k.org", "time": "Thu May 01 04:34:31 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 01 08:03:58 2008 -0700" }, "message": "remove div_long_long_rem\n\nx86 is the only arch right now, which provides an optimized for\ndiv_long_long_rem and it has the downside that one has to be very careful that\nthe divide doesn\u0027t overflow.\n\nThe API is a little akward, as the arguments for the unsigned divide are\nsigned. The signed version also doesn\u0027t handle a negative divisor and\nproduces worse code on 64bit archs.\n\nThere is little incentive to keep this API alive, so this converts the few\nusers to the new API.\n\nSigned-off-by: Roman Zippel \u003czippel@linux-m68k.org\u003e\nCc: Ralf Baechle \u003cralf@linux-mips.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: john stultz \u003cjohnstul@us.ibm.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5167464446e527b5a3b5618ba0baff93048bcbbe", "tree": "798e82ec478d6d6935ae371fc764ae95d86a337d", "parents": [ "3a902c5f6851cd0b64c33efaa3bd57aa27a82efb" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Wed Apr 30 00:55:17 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 30 08:29:55 2008 -0700" }, "message": "revert \"memory hotplug: allocate usemap on the section with pgdat\"\n\nThis:\n\ncommit 86f6dae1377523689bd8468fed2f2dd180fc0560\nAuthor: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nDate: Mon Apr 28 02:13:33 2008 -0700\n\n memory hotplug: allocate usemap on the section with pgdat\n\n Usemaps are allocated on the section which has pgdat by this.\n\n Because usemap size is very small, many other sections usemaps are allocated\n on only one page. If a section has usemap, it can\u0027t be removed until removing\n other sections. This dependency is not desirable for memory removing.\n\n Pgdat has similar feature. When a section has pgdat area, it must be the last\n section for removing on the node. So, if section A has pgdat and section B\n has usemap for section A, Both sections can\u0027t be removed due to dependency\n each other.\n\n To solve this issue, this patch collects usemap on same section with pgdat.\n If other sections doesn\u0027t have any dependency, this section will be able to be\n removed finally.\n\n Signed-off-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\n Cc: Badari Pulavarty \u003cpbadari@us.ibm.com\u003e\n Cc: Yinghai Lu \u003cyhlu.kernel@gmail.com\u003e\n Cc: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\n Signed-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\n Signed-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n\nbroke davem\u0027s sparc64 bootup. Revert it while we work out what went wrong.\n\nCc: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: Badari Pulavarty \u003cpbadari@us.ibm.com\u003e\nCc: Yinghai Lu \u003cyhlu.kernel@gmail.com\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3a902c5f6851cd0b64c33efaa3bd57aa27a82efb", "tree": "9803f7bdc847ed8cd5192816d9ca0ee9e310cd60", "parents": [ "969a19f1c405a8e9d15ceb9e75e3f4a321aaf56f" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Wed Apr 30 00:55:16 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 30 08:29:55 2008 -0700" }, "message": "mm: fix warning on memory offline\n\nKAMEZAWA Hiroyuki found a warning message in the buffer dirtying code that\nis coming from page migration caller.\n\nWARNING: at fs/buffer.c:720 __set_page_dirty+0x330/0x360()\nCall Trace:\n [\u003ca000000100015220\u003e] show_stack+0x80/0xa0\n [\u003ca000000100015270\u003e] dump_stack+0x30/0x60\n [\u003ca000000100089ed0\u003e] warn_on_slowpath+0x90/0xe0\n [\u003ca0000001001f8b10\u003e] __set_page_dirty+0x330/0x360\n [\u003ca0000001001ffb90\u003e] __set_page_dirty_buffers+0xd0/0x280\n [\u003ca00000010012fec0\u003e] set_page_dirty+0xc0/0x260\n [\u003ca000000100195670\u003e] migrate_page_copy+0x5d0/0x5e0\n [\u003ca000000100197840\u003e] buffer_migrate_page+0x2e0/0x3c0\n [\u003ca000000100195eb0\u003e] migrate_pages+0x770/0xe00\n\nWhat was happening is that migrate_page_copy wants to transfer the PG_dirty\nbit from old page to new page, so what it would do is set_page_dirty(newpage).\nHowever set_page_dirty() is used to set the entire page dirty, wheras in\nthis case, only part of the page was dirty, and it also was not uptodate.\n\nMarking the whole page dirty with set_page_dirty would lead to corruption or\nunresolvable conditions -- a dirty \u0026\u0026 !uptodate page and dirty \u0026\u0026 !uptodate\nbuffers.\n\nPossibly we could just ClearPageDirty(oldpage); SetPageDirty(newpage);\nhowever in the interests of keeping the change minimal...\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nTested-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d40cee245ff6ad05d3448401d7320be82c1c5af1", "tree": "5467cada898e80d5e43592393b21252312c908fa", "parents": [ "d7853d1f8932c847a8d7b3b38e6baedf77148cfb" ], "author": { "name": "Harvey Harrison", "email": "harvey.harrison@gmail.com", "time": "Wed Apr 30 00:55:07 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 30 08:29:53 2008 -0700" }, "message": "mm: remove remaining __FUNCTION__ occurrences\n\n__FUNCTION__ is gcc-specific, use __func__\n\nSigned-off-by: Harvey Harrison \u003charvey.harrison@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3ac7fe5a4aab409bd5674d0b070bce97f9d20872", "tree": "5e12e8864bb8737695e4eb9c63970602d5f69e73", "parents": [ "30327acf7846c5eb97c8e31c78317a2918d3e515" ], "author": { "name": "Thomas Gleixner", "email": "tglx@linutronix.de", "time": "Wed Apr 30 00:55:01 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 30 08:29:53 2008 -0700" }, "message": "infrastructure to debug (dynamic) objects\n\nWe can see an ever repeating problem pattern with objects of any kind in the\nkernel:\n\n1) freeing of active objects\n2) reinitialization of active objects\n\nBoth problems can be hard to debug because the crash happens at a point where\nwe have no chance to decode the root cause anymore. One problem spot are\nkernel timers, where the detection of the problem often happens in interrupt\ncontext and usually causes the machine to panic.\n\nWhile working on a timer related bug report I had to hack specialized code\ninto the timer subsystem to get a reasonable hint for the root cause. This\ndebug hack was fine for temporary use, but far from a mergeable solution due\nto the intrusiveness into the timer code.\n\nThe code further lacked the ability to detect and report the root cause\ninstantly and keep the system operational.\n\nKeeping the system operational is important to get hold of the debug\ninformation without special debugging aids like serial consoles and special\nknowledge of the bug reporter.\n\nThe problems described above are not restricted to timers, but timers tend to\nexpose it usually in a full system crash. Other objects are less explosive,\nbut the symptoms caused by such mistakes can be even harder to debug.\n\nInstead of creating specialized debugging code for the timer subsystem a\ngeneric infrastructure is created which allows developers to verify their code\nand provides an easy to enable debug facility for users in case of trouble.\n\nThe debugobjects core code keeps track of operations on static and dynamic\nobjects by inserting them into a hashed list and sanity checking them on\nobject operations and provides additional checks whenever kernel memory is\nfreed.\n\nThe tracked object operations are:\n- initializing an object\n- adding an object to a subsystem list\n- deleting an object from a subsystem list\n\nEach operation is sanity checked before the operation is executed and the\nsubsystem specific code can provide a fixup function which allows to prevent\nthe damage of the operation. When the sanity check triggers a warning message\nand a stack trace is printed.\n\nThe list of operations can be extended if the need arises. For now it\u0027s\nlimited to the requirements of the first user (timers).\n\nThe core code enqueues the objects into hash buckets. The hash index is\ngenerated from the address of the object to simplify the lookup for the check\non kfree/vfree. Each bucket has it\u0027s own spinlock to avoid contention on a\nglobal lock.\n\nThe debug code can be compiled in without being active. The runtime overhead\nis minimal and could be optimized by asm alternatives. A kernel command line\noption enables the debugging code.\n\nThanks to Ingo Molnar for review, suggestions and cleanup patches.\n\nSigned-off-by: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Greg KH \u003cgreg@kroah.com\u003e\nCc: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nCc: Kay Sievers \u003ckay.sievers@vrfy.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "fc3ba692a4d19019387c5acaea63131f9eab05dd", "tree": "c86e025cb8f79c7ffc479029989b7378bcb9f285", "parents": [ "dd5656e59ca7b25fb60a22f9079905ed0da5ed0c" ], "author": { "name": "Miklos Szeredi", "email": "mszeredi@suse.cz", "time": "Wed Apr 30 00:54:38 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 30 08:29:50 2008 -0700" }, "message": "mm: Add NR_WRITEBACK_TEMP counter\n\nFuse will use temporary buffers to write back dirty data from memory mappings\n(normal writes are done synchronously). This is needed, because there cannot\nbe any guarantee about the time in which a write will complete.\n\nBy using temporary buffers, from the MM\u0027s point if view the page is written\nback immediately. If the writeout was due to memory pressure, this\neffectively migrates data from a full zone to a less full zone.\n\nThis patch adds a new counter (NR_WRITEBACK_TEMP) for the number of pages used\nas temporary buffers.\n\n[Lee.Schermerhorn@hp.com: add vmstat_text for NR_WRITEBACK_TEMP]\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "dd5656e59ca7b25fb60a22f9079905ed0da5ed0c", "tree": "47c156e6023e93f3028c63a2594bbb3e27e968a4", "parents": [ "e4ad08fe64afca4ef79ecc4c624e6e871688da0d" ], "author": { "name": "Miklos Szeredi", "email": "mszeredi@suse.cz", "time": "Wed Apr 30 00:54:37 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 30 08:29:50 2008 -0700" }, "message": "mm: bdi: export bdi_writeout_inc()\n\nFuse needs this for writable mmap support.\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e4ad08fe64afca4ef79ecc4c624e6e871688da0d", "tree": "5b8b390b874700041dc0c095e8ba9ac3ed42ea77", "parents": [ "76f1418b485da2707531178e517bbb5cf06b3c76" ], "author": { "name": "Miklos Szeredi", "email": "mszeredi@suse.cz", "time": "Wed Apr 30 00:54:37 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 30 08:29:50 2008 -0700" }, "message": "mm: bdi: add separate writeback accounting capability\n\nAdd a new BDI capability flag: BDI_CAP_NO_ACCT_WB. If this flag is\nset, then don\u0027t update the per-bdi writeback stats from\ntest_set_page_writeback() and test_clear_page_writeback().\n\nMisc cleanups:\n\n - convert bdi_cap_writeback_dirty() and friends to static inline functions\n - create a flag that includes all three dirty/writeback related flags,\n since almst all users will want to have them toghether\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "76f1418b485da2707531178e517bbb5cf06b3c76", "tree": "138a012d965ebc284163f42e0ff5786c6de1cda5", "parents": [ "a42dde04152750426cc620fd277e80fffae2f65a" ], "author": { "name": "Miklos Szeredi", "email": "mszeredi@suse.cz", "time": "Wed Apr 30 00:54:36 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 30 08:29:50 2008 -0700" }, "message": "mm: bdi: move statistics to debugfs\n\nMove BDI statistics to debugfs:\n\n /sys/kernel/debug/bdi/\u003cbdi\u003e/stats\n\nUse postcore_initcall() to initialize the sysfs class and debugfs,\nbecause debugfs is initialized in core_initcall().\n\nUpdate descriptions in ABI documentation.\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a42dde04152750426cc620fd277e80fffae2f65a", "tree": "98cdf246280c59e0bf044ae6d2c229fc27b73203", "parents": [ "189d3c4a94ef19fca2a71a6a336e9fda900e25e7" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Wed Apr 30 00:54:36 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 30 08:29:50 2008 -0700" }, "message": "mm: bdi: allow setting a maximum for the bdi dirty limit\n\nAdd \"max_ratio\" to /sys/class/bdi. This indicates the maximum percentage of\nthe global dirty threshold allocated to this bdi.\n\n[mszeredi@suse.cz]\n\n - fix parsing in max_ratio_store().\n - export bdi_set_max_ratio() to modules\n - limit bdi_dirty with bdi-\u003emax_ratio\n - document new sysfs attribute\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "189d3c4a94ef19fca2a71a6a336e9fda900e25e7", "tree": "75c0de871fe9922885a2fa073f15806d829342fa", "parents": [ "b6f2fcbcfca9db2bd7aa24940224fcd3bbdbb8aa" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Wed Apr 30 00:54:35 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 30 08:29:50 2008 -0700" }, "message": "mm: bdi: allow setting a minimum for the bdi dirty limit\n\nUnder normal circumstances each device is given a part of the total write-back\ncache that relates to its current avg writeout speed in relation to the other\ndevices.\n\nmin_ratio - allows one to assign a minimum portion of the write-back cache to\na particular device. This is useful in situations where you might want to\nprovide a minimum QoS. (One request for this feature came from flash based\nstorage people who wanted to avoid writing out at all costs - they of course\nneeded some pdflush hacks as well)\n\nmax_ratio - allows one to assign a maximum portion of the dirty limit to a\nparticular device. This is useful in situations where you want to avoid one\ndevice taking all or most of the write-back cache. Eg. an NFS mount that is\nprone to get stuck, or a FUSE mount which you don\u0027t trust to play fair.\n\nAdd \"min_ratio\" to /sys/class/bdi. This indicates the minimum percentage of\nthe global dirty threshold allocated to this bdi.\n\n[mszeredi@suse.cz]\n\n - fix parsing in min_ratio_store()\n - document new sysfs attribute\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cf0ca9fe5dd9e3693d935757a7b2fc50fc576554", "tree": "c795c5271eda9fc67579fa3176c646b892dfdb41", "parents": [ "caafa4324335aeb11bc233d5f87aca8cce30beba" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Wed Apr 30 00:54:32 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 30 08:29:49 2008 -0700" }, "message": "mm: bdi: export BDI attributes in sysfs\n\nProvide a place in sysfs (/sys/class/bdi) for the backing_dev_info object.\nThis allows us to see and set the various BDI specific variables.\n\nIn particular this properly exposes the read-ahead window for all relevant\nusers and /sys/block/\u003cblock\u003e/queue/read_ahead_kb should be deprecated.\n\nWith patient help from Kay Sievers and Greg KH\n\n[mszeredi@suse.cz]\n\n - split off NFS and FUSE changes into separate patches\n - document new sysfs attributes under Documentation/ABI\n - do bdi_class_init as a core_initcall, otherwise the \"default\" BDI\n won\u0027t be initialized\n - remove bdi_init_fmt macro, it\u0027s not used very much\n\n[akpm@linux-foundation.org: fix ia64 warning]\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Kay Sievers \u003ckay.sievers@vrfy.org\u003e\nAcked-by: Greg KH \u003cgreg@kroah.com\u003e\nCc: Trond Myklebust \u003ctrond.myklebust@fys.uio.no\u003e\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "41b25a3784c137ad52c71619c73b925860b1b3a2", "tree": "4c7e858a692c8ffa41294d661e8f10d58927ed67", "parents": [ "2f3517418dc0684a32318f2c5b53257416448b1e" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Wed Apr 30 00:52:13 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 30 08:29:30 2008 -0700" }, "message": "/proc/pagetypeinfo: fix output for memoryless nodes\n\non memoryless node, /proc/pagetypeinfo is displayed slightly funny output.\nthis patch fix it.\n\noutput example (header is outputed, but no data is outputed)\n--------------------------------------------------------------\nPage block order: 14\nPages per block: 16384\n\nFree pages count per migrate type at order 0 1 2 3 4 5 \\\n 6 7 8 9 10 11 12 13 14 15 16\n\nNumber of blocks type Unmovable Reclaimable Movable Reserve Isolate\nPage block order: 14\nPages per block: 16384\n\nFree pages count per migrate type at order 0 1 2 3 4 5 \\\n 6 7 8 9 10 11 12 13 14 15 16\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3d71f86f4dfccd749e4421f10301f3f3b31da88a", "tree": "7a052e776b660a2fa1bbe3702fd061bc3d3e6a37", "parents": [ "6a6375db13703b42dd51b28576d444bb73c541b9" ], "author": { "name": "Denis V. Lunev", "email": "den@openvz.org", "time": "Tue Apr 29 01:02:13 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:20 2008 -0700" }, "message": "mm: use non-racy method for /proc/swaps creation\n\nUse proc_create() to make sure that -\u003eproc_fops be setup before gluing PDE to\nmain tree.\n\nSigned-off-by: Denis V. Lunev \u003cden@openvz.org\u003e\nCc: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "925d1c401fa6cfd0df5d2e37da8981494ccdec07", "tree": "4f3b7a09311cd99783b822350628125e44f9902d", "parents": [ "e93b4ea20adb20f1f1f07f10ba5d7dd739d2843e" ], "author": { "name": "Matt Helsley", "email": "matthltc@us.ibm.com", "time": "Tue Apr 29 01:01:36 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:17 2008 -0700" }, "message": "procfs task exe symlink\n\nThe kernel implements readlink of /proc/pid/exe by getting the file from\nthe first executable VMA. Then the path to the file is reconstructed and\nreported as the result.\n\nBecause of the VMA walk the code is slightly different on nommu systems.\nThis patch avoids separate /proc/pid/exe code on nommu systems. Instead of\nwalking the VMAs to find the first executable file-backed VMA we store a\nreference to the exec\u0027d file in the mm_struct.\n\nThat reference would prevent the filesystem holding the executable file\nfrom being unmounted even after unmapping the VMAs. So we track the number\nof VM_EXECUTABLE VMAs and drop the new reference when the last one is\nunmapped. This avoids pinning the mounted filesystem.\n\n[akpm@linux-foundation.org: improve comments]\n[yamamoto@valinux.co.jp: fix dup_mmap]\nSigned-off-by: Matt Helsley \u003cmatthltc@us.ibm.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nCc: David Howells \u003cdhowells@redhat.com\u003e\nCc:\"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: YAMAMOTO Takashi \u003cyamamoto@valinux.co.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "0c40ba4fd64f98e7a5cba8ffaedbd68642a85700", "tree": "8aba0ac7b89f436d73c1cf74058315aee8b6025f", "parents": [ "4d89dc6ab2711258bfd12c72d753f3ad56b244e2" ], "author": { "name": "Nadia Derbey", "email": "Nadia.Derbey@bull.net", "time": "Tue Apr 29 01:00:41 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:12 2008 -0700" }, "message": "ipc: define the slab_memory_callback priority as a constant\n\nThis is a trivial patch that defines the priority of slab_memory_callback in\nthe callback chain as a constant. This is to prepare for next patch in the\nseries.\n\nSigned-off-by: Nadia Derbey \u003cNadia.Derbey@bull.net\u003e\nCc: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: Matt Helsley \u003cmatthltc@us.ibm.com\u003e\nCc: Mingming Cao \u003ccmm@us.ibm.com\u003e\nCc: Pierre Peiffer \u003cpierre.peiffer@bull.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1faf8e40a8ab12ae1f7f474965e6fb031e43f8d6", "tree": "7448f437cc527d4396269945e070c841e0f1603d", "parents": [ "33327948782bcef89c78eb47af86b6a2df9fd4a5" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Tue Apr 29 01:00:24 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:11 2008 -0700" }, "message": "memcg: remove redundant initialization in mem_cgroup_create()\n\n*mem has been zeroed, that means mem-\u003einfo has already been filled with 0.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "33327948782bcef89c78eb47af86b6a2df9fd4a5", "tree": "c1045eaee1b63a6be37a09c969e2433a5c595c33", "parents": [ "4a56d02e34baedbea5eb1fd558f2b856b8c7db1e" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Tue Apr 29 01:00:24 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:11 2008 -0700" }, "message": "memcgroup: use vmalloc for mem_cgroup allocation\n\nOn ia64, this kmalloc() requires order-4 pages. But this is not necessary to\nbe physically contiguous. For big mem_cgroup, vmalloc is better. For small\nones, kmalloc is used.\n\n[akpm@linux-foundation.org: simplification]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4a56d02e34baedbea5eb1fd558f2b856b8c7db1e", "tree": "212dc2ed8562014963f2bd8b66578a5aa36f426c", "parents": [ "3eae90c3cdd4e762d0f4f5e939c98780fccded57" ], "author": { "name": "Balbir Singh", "email": "balbir@linux.vnet.ibm.com", "time": "Tue Apr 29 01:00:23 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:11 2008 -0700" }, "message": "memcgroup: make the memory controller more desktop responsive\n\nThis patch makes the memory controller more responsive on my desktop.\n\n1. Set all cached pages as inactive. We were by default marking all pages\n as active, thus forcing us to go through two passes for reclaiming pages\n\n2. Remove congestion_wait(), since we already have that logic in\n do_try_to_free_pages()\n\nSigned-off-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: YAMAMOTO Takashi \u003cyamamoto@valinux.co.jp\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Pavel Emelianov \u003cxemul@openvz.org\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3eae90c3cdd4e762d0f4f5e939c98780fccded57", "tree": "d5b6f138e8464827b7b882fc6acea3916aca8957", "parents": [ "29f2a4dac856e9433a502b05b40e8e90385d8e27" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Tue Apr 29 01:00:22 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:10 2008 -0700" }, "message": "memcg: remove redundant function calls\n\nremove_list/add_list uses page_cgroup_zoneinfo() in it.\n\nSo, it\u0027s called twice before and after lock.\n\n\tmz \u003d page_cgroup_zoneinfo();\n\tlock();\n\tmz \u003d page_cgroup_zoneinfo();\n\t....\n\tunlock();\n\nAnd address of mz never changes.\n\nThis is not good. This patch fixes this behavior.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "29f2a4dac856e9433a502b05b40e8e90385d8e27", "tree": "242772a246a6a5170ed5183d3fe3944a6f36a169", "parents": [ "85cc59db12724e1248f5e4841e61339cf485d5c7" ], "author": { "name": "Pavel Emelyanov", "email": "xemul@openvz.org", "time": "Tue Apr 29 01:00:21 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:10 2008 -0700" }, "message": "memcgroup: implement failcounter reset\n\nThis is a very common requirement from people using the resource accounting\nfacilities (not only memcgroup but also OpenVZ beancounters). They want to\nput the cgroup in an initial state without re-creating it.\n\nFor example after re-configuring a group people want to observe how this new\nconfiguration fits the group needs without saving the previous failcnt value.\n\nMerge two resets into one mem_cgroup_reset() function to demonstrate how\nmultiplexing work.\n\nBesides, I have plans to move the files, that correspond to res_counter to the\nres_counter.c file and somehow \"import\" them into controller. I don\u0027t know\nhow to make it gracefully yet, but merging resets of max_usage and failcnt in\none function will be there for sure.\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "85cc59db12724e1248f5e4841e61339cf485d5c7", "tree": "960340cafba30181a1e2f60c93cd54a6fdb637ff", "parents": [ "b6ac57d50a375aa2f267e1b2b56c46564a936d00" ], "author": { "name": "Pavel Emelyanov", "email": "xemul@openvz.org", "time": "Tue Apr 29 01:00:20 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:10 2008 -0700" }, "message": "memcgroup: use triggers in force_empty and max_usage files\n\nThese two files are essentially event callbacks. They do not care about the\ncontents of the string, but only about the fact of the write itself.\n\nSigned-off-by: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b6ac57d50a375aa2f267e1b2b56c46564a936d00", "tree": "51aca62f4b9961f2105672b3429723ca73d78386", "parents": [ "faebe9fdf35058bb8421e4c09f6f70994eaf8db2" ], "author": { "name": "Balbir Singh", "email": "balbir@linux.vnet.ibm.com", "time": "Tue Apr 29 01:00:19 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:10 2008 -0700" }, "message": "memcgroup: move memory controller allocations to their own slabs\n\nMove the memory controller data structure page_cgroup to its own slab cache.\nIt saves space on the system, allocations are not necessarily pushed to order\nof 2 and should provide performance benefits. Users who disable the memory\ncontroller can also double check that the memory controller is not allocating\npage_cgroup\u0027s.\n\nNOTE: Hugh Dickins brought up the issue of whether we want to mark page_cgroup\nas __GFP_MOVABLE or __GFP_RECLAIMABLE. I don\u0027t think there is an easy answer\nat the moment. page_cgroup\u0027s are associated with user pages, they can be\nreclaimed once the user page has been reclaimed, so it might make sense to\nmark them as __GFP_RECLAIMABLE. For now, I am leaving the marking to default\nvalues that the slab allocator uses.\n\nSigned-off-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Pavel Emelianov \u003cxemul@openvz.org\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Sudhir Kumar \u003cskumar@linux.vnet.ibm.com\u003e\nCc: YAMAMOTO Takashi \u003cyamamoto@valinux.co.jp\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c84872e168d10926acd2dee975d19172eef79252", "tree": "c28f4f87ad38b524fe2a4c1e0e590bea3aacd92a", "parents": [ "cf475ad28ac35cc9ba612d67158f29b73b38b05d" ], "author": { "name": "Pavel Emelyanov", "email": "xemul@openvz.org", "time": "Tue Apr 29 01:00:17 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:10 2008 -0700" }, "message": "memcgroup: add the max_usage member on the res_counter\n\nThis field is the maximal value of the usage one since the counter creation\n(or since the latest reset).\n\nTo reset this to the usage value simply write anything to the appropriate\ncgroup file.\n\nSigned-off-by: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cf475ad28ac35cc9ba612d67158f29b73b38b05d", "tree": "2c7cd568d00357bd42643ea602884e731cc24f26", "parents": [ "29486df325e1fe6e1764afcb19e3370804c2b002" ], "author": { "name": "Balbir Singh", "email": "balbir@linux.vnet.ibm.com", "time": "Tue Apr 29 01:00:16 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:10 2008 -0700" }, "message": "cgroups: add an owner to the mm_struct\n\nRemove the mem_cgroup member from mm_struct and instead adds an owner.\n\nThis approach was suggested by Paul Menage. The advantage of this approach\nis that, once the mm-\u003eowner is known, using the subsystem id, the cgroup\ncan be determined. It also allows several control groups that are\nvirtually grouped by mm_struct, to exist independent of the memory\ncontroller i.e., without adding mem_cgroup\u0027s for each controller, to\nmm_struct.\n\nA new config option CONFIG_MM_OWNER is added and the memory resource\ncontroller selects this config option.\n\nThis patch also adds cgroup callbacks to notify subsystems when mm-\u003eowner\nchanges. The mm_cgroup_changed callback is called with the task_lock() of\nthe new task held and is called just prior to changing the mm-\u003eowner.\n\nI am indebted to Paul Menage for the several reviews of this patchset and\nhelping me make it lighter and simpler.\n\nThis patch was tested on a powerpc box, it was compiled with both the\nMM_OWNER config turned on and off.\n\nAfter the thread group leader exits, it\u0027s moved to init_css_state by\ncgroup_exit(), thus all future charges from runnings threads would be\nredirected to the init_css_set\u0027s subsystem.\n\nSigned-off-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Pavel Emelianov \u003cxemul@openvz.org\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Sudhir Kumar \u003cskumar@linux.vnet.ibm.com\u003e\nCc: YAMAMOTO Takashi \u003cyamamoto@valinux.co.jp\u003e\nCc: Hirokazu Takahashi \u003ctaka@valinux.co.jp\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e,\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nReviewed-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c27e8818a09bbdfe7c07c629cb2c27e1a742e156", "tree": "2ed583bc69f4224259c00aad8703a0bc452b8469", "parents": [ "c64745cf0f34f2cb08fc28c93d844e583d0d591d" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Tue Apr 29 01:00:03 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:08 2008 -0700" }, "message": "CGroup API files: drop mem_cgroup_force_empty()\n\nThis function isn\u0027t needed - a NULL pointer in the cftype read function will\nresult in the same EINVAL response to userspace.\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nCc: \"Li Zefan\" \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: \"YAMAMOTO Takashi\" \u003cyamamoto@valinux.co.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c64745cf0f34f2cb08fc28c93d844e583d0d591d", "tree": "d957cd0cd83917ee69c72eb92d1db0c4cb2ed2bc", "parents": [ "9179656961adcea3c25403365597e486d851ac5e" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Tue Apr 29 01:00:02 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:08 2008 -0700" }, "message": "CGroup API files: use cgroup map for memcontrol stats file\n\nRemove the seq_file boilerplate used to construct the memcontrol stats map,\nand instead use the new map representation for cgroup control files\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nCc: \"Li Zefan\" \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: \"YAMAMOTO Takashi\" \u003cyamamoto@valinux.co.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2c3daa722b624eaf0c5ea60e4f180bd0684542e2", "tree": "afdb7e2068b018569dda8415b184b6de2ab330a6", "parents": [ "2c7eabf37647dd459d555e76954b4de87be2321f" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Tue Apr 29 00:59:58 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:08 2008 -0700" }, "message": "CGroup API files: use read_u64 in memory controller\n\nUpdate the memory controller to use read_u64 for its limit/usage/failcnt\ncontrol files, calling the new res_counter_read_u64() function.\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nCc: \"Li Zefan\" \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: \"YAMAMOTO Takashi\" \u003cyamamoto@valinux.co.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "551883ae8c9c31460e796e7b1b8aa9069de268b4", "tree": "2f2aaef8024656b3b5e1cf9e599608e54d2e483e", "parents": [ "a41f24ea9fd6169b147c53c2392e2887cc1d9247" ], "author": { "name": "Nishanth Aravamudan", "email": "nacc@us.ibm.com", "time": "Tue Apr 29 00:58:26 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:05:58 2008 -0700" }, "message": "page allocator: explicitly retry hugepage allocations\n\nAdd __GFP_REPEAT to hugepage allocations. Do so to not necessitate userspace\nputting pressure on the VM by repeated echo\u0027s into /proc/sys/vm/nr_hugepages\nto grow the pool. With the previous patch to allow for large-order\n__GFP_REPEAT attempts to loop for a bit (as opposed to indefinitely), this\nincreases the likelihood of getting hugepages when the system experiences (or\nrecently experienced) load.\n\nMel tested the patchset on an x86_32 laptop. With the patches, it was easier\nto use the proc interface to grow the hugepage pool. The following is the\noutput of a script that grows the pool as much as possible running on\n2.6.25-rc9.\n\nAllocating hugepages test\n-------------------------\nDisabling OOM Killer for current test process\nStarting page count: 0\nAttempt 1: 57 pages Progress made with 57 pages\nAttempt 2: 73 pages Progress made with 16 pages\nAttempt 3: 74 pages Progress made with 1 pages\nAttempt 4: 75 pages Progress made with 1 pages\nAttempt 5: 77 pages Progress made with 2 pages\n\n77 pages was the most it allocated but it took 5 attempts from userspace\nto get it. With the 3 patches in this series applied,\n\nAllocating hugepages test\n-------------------------\nDisabling OOM Killer for current test process\nStarting page count: 0\nAttempt 1: 75 pages Progress made with 75 pages\nAttempt 2: 76 pages Progress made with 1 pages\nAttempt 3: 79 pages Progress made with 3 pages\n\nAnd 79 pages was the most it got. Your patches were able to allocate the\nbulk of possible pages on the first attempt.\n\nSigned-off-by: Nishanth Aravamudan \u003cnacc@us.ibm.com\u003e\nCc: Andy Whitcroft \u003capw@shadowen.org\u003e\nTested-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a41f24ea9fd6169b147c53c2392e2887cc1d9247", "tree": "e6cf79a82f6516a30731f7dec7ed5d76466bb350", "parents": [ "ab857d09386661145924c9403792234aeca4bdff" ], "author": { "name": "Nishanth Aravamudan", "email": "nacc@us.ibm.com", "time": "Tue Apr 29 00:58:25 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:05:58 2008 -0700" }, "message": "page allocator: smarter retry of costly-order allocations\n\nBecause of page order checks in __alloc_pages(), hugepage (and similarly\nlarge order) allocations will not retry unless explicitly marked\n__GFP_REPEAT. However, the current retry logic is nearly an infinite\nloop (or until reclaim does no progress whatsoever). For these costly\nallocations, that seems like overkill and could potentially never\nterminate. Mel observed that allowing current __GFP_REPEAT semantics for\nhugepage allocations essentially killed the system. I believe this is\nbecause we may continue to reclaim small orders of pages all over, but\nnever have enough to satisfy the hugepage allocation request. This is\nclearly only a problem for large order allocations, of which hugepages\nare the most obvious (to me).\n\nModify try_to_free_pages() to indicate how many pages were reclaimed.\nUse that information in __alloc_pages() to eventually fail a large\n__GFP_REPEAT allocation when we\u0027ve reclaimed an order of pages equal to\nor greater than the allocation\u0027s order. This relies on lumpy reclaim\nfunctioning as advertised. Due to fragmentation, lumpy reclaim may not\nbe able to free up the order needed in one invocation, so multiple\niterations may be requred. In other words, the more fragmented memory\nis, the more retry attempts __GFP_REPEAT will make (particularly for\nhigher order allocations).\n\nThis changes the semantics of __GFP_REPEAT subtly, but *only* for\nallocations \u003e PAGE_ALLOC_COSTLY_ORDER. With this patch, for those size\nallocations, we will try up to some point (at least 1\u003c\u003corder reclaimed\npages), rather than forever (which is the case for allocations \u003c\u003d\nPAGE_ALLOC_COSTLY_ORDER).\n\nThis change improves the /proc/sys/vm/nr_hugepages interface with a\nfollow-on patch that makes pool allocations use __GFP_REPEAT. Rather\nthan administrators repeatedly echo\u0027ing a particular value into the\nsysctl, and forcing reclaim into action manually, this change allows for\nthe sysctl to attempt a reasonable effort itself. Similarly, dynamic\npool growth should be more successful under load, as lumpy reclaim can\ntry to free up pages, rather than failing right away.\n\nChoosing to reclaim only up to the order of the requested allocation\nstrikes a balance between not failing hugepage allocations and returning\nto the caller when it\u0027s unlikely to every succeed. Because of lumpy\nreclaim, if we have freed the order requested, hopefully it has been in\nbig chunks and those chunks will allow our allocation to succeed. If\nthat isn\u0027t the case after freeing up the current order, I don\u0027t think it\nis likely to succeed in the future, although it is possible given a\nparticular fragmentation pattern.\n\nSigned-off-by: Nishanth Aravamudan \u003cnacc@us.ibm.com\u003e\nCc: Andy Whitcroft \u003capw@shadowen.org\u003e\nTested-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ab857d09386661145924c9403792234aeca4bdff", "tree": "02027a87f919d721615664910b415f21bd88e9c5", "parents": [ "86051ca5eaf5e560113ec7673462804c54284456" ], "author": { "name": "Nishanth Aravamudan", "email": "nacc@us.ibm.com", "time": "Tue Apr 29 00:58:23 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:05:58 2008 -0700" }, "message": "mm: fix misleading __GFP_REPEAT related comments\n\nThe definition and use of __GFP_REPEAT, __GFP_NOFAIL and __GFP_NORETRY in the\ncore VM have somewhat differing comments as to their actual semantics.\nAnnoyingly, the flags definition has inline and header comments, which might\nbe interpreted as not being equivalent. Just add references to the header\ncomments in the inline ones so they don\u0027t go out of sync in the future. In\ntheir use in __alloc_pages() clarify that the current implementation treats\nlow-order allocations and __GFP_REPEAT allocations as distinct cases.\n\nTo clarify, the flags\u0027 semantics are:\n\n__GFP_NORETRY means try no harder than one run through __alloc_pages\n\n__GFP_REPEAT means __GFP_NOFAIL\n\n__GFP_NOFAIL means repeat forever\n\norder \u003c\u003d PAGE_ALLOC_COSTLY_ORDER means __GFP_NOFAIL\n\nSigned-off-by: Nishanth Aravamudan \u003cnacc@us.ibm.com\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "86051ca5eaf5e560113ec7673462804c54284456", "tree": "e2e6fd3df079f85c43c7e164569a8c962f91e537", "parents": [ "a01e035ebb552223c03f2d9138ffc73f2d4d3965" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Tue Apr 29 00:58:21 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:05:58 2008 -0700" }, "message": "mm: fix usemap initialization\n\nusemap must be initialized only when pfn is within zone. If not, it corrupts\nmemory.\n\nAnd this patch also reduces the number of calls to set_pageblock_migratetype()\nfrom\n\t(pfn \u0026 (pageblock_nr_pages -1)\nto\n\t!(pfn \u0026 (pageblock_nr_pages-1)\nit should be called once per pageblock.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Shi Weihua \u003cshiwh@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7b8ee84d8926e6c6ec584548d23a12f1410b4db7", "tree": "39ad257e276625771e5112dfa0d5b620532b0fb6", "parents": [ "b331d259b1147f82d692f3b866e036017cbde8fe" ], "author": { "name": "Harvey Harrison", "email": "harvey.harrison@gmail.com", "time": "Mon Apr 28 14:13:19 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 17:29:18 2008 -0700" }, "message": "mm: fix integer as NULL pointer warnings\n\nmm/hugetlb.c:207:11: warning: Using plain integer as NULL pointer\n\nSigned-off-by: Harvey Harrison \u003charvey.harrison@gmail.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e97e386b126c2d60b8da61ce1e4964b41b3d1514", "tree": "7e04b7f735004330777200c6742568fc130ff893", "parents": [ "d9dedc13851f9cbd568fbc631a17b0be83404957", "c124f5b54f879e5870befcc076addbd5d614663f" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 14:08:56 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 14:08:56 2008 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6:\n slub: pack objects denser\n slub: Calculate min_objects based on number of processors.\n slub: Drop DEFAULT_MAX_ORDER / DEFAULT_MIN_OBJECTS\n slub: Simplify any_slab_object checks\n slub: Make the order configurable for each slab cache\n slub: Drop fallback to page allocator method\n slub: Fallback to minimal order during slab page allocation\n slub: Update statistics handling for variable order slabs\n slub: Add kmem_cache_order_objects struct\n slub: for_each_object must be passed the number of objects in a slab\n slub: Store max number of objects in the page struct.\n slub: Dump list of objects not freed on kmem_cache_close()\n slub: free_list() cleanup\n slub: improve kmem_cache_destroy() error message\n slob: fix bug - when slob allocates \"struct kmem_cache\", it does not force alignment.\n" }, { "commit": "1e5ad9a3b9b78767a2eb1345201e46f41f9457ef", "tree": "c1b47287f98a660ee9e94c617c9c8d09f815734f", "parents": [ "0c96c5979a522c3323c30a078a70120e29b5bdbc" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Mon Apr 28 20:40:08 2008 +0300" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 13:44:29 2008 -0700" }, "message": "mm/memory_hotplug.c must #include \"internal.h\"\n\nThis patch fixes the following compile error caused by commit\n04753278769f3b6c3b79a080edb52f21d83bf6e2 (\"memory hotplug: register\nsection/node id to free\"):\n\n CC mm/memory_hotplug.o\n /home/bunk/linux/kernel-2.6/git/linux-2.6/mm/memory_hotplug.c: In function ‘put_page_bootmem’:\n /home/bunk/linux/kernel-2.6/git/linux-2.6/mm/memory_hotplug.c:82: error: implicit declaration of function ‘__free_pages_bootmem’\n /home/bunk/linux/kernel-2.6/git/linux-2.6/mm/memory_hotplug.c: At top level:\n /home/bunk/linux/kernel-2.6/git/linux-2.6/mm/memory_hotplug.c:87: warning: no previous prototype for ‘register_page_bootmem_info_section’\n make[2]: *** [mm/memory_hotplug.o] Error 1\n\n[ Andrew: \"Argh. The -mm-only memory-hotplug-add-removable-to-sysfs-\n to-show-memblock-removability.patch debugging patch adds that include\n so nobody hit this before. ]\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4016a1390d07f15b267eecb20e76a48fd5c524ef", "tree": "ae9ce9bd7d2fd784a396893c4d4b2a79b2d7342d", "parents": [ "468fd62ed9090ccbe872489df5d0d099510df4b5" ], "author": { "name": "Michael Hennerich", "email": "Michael.Hennerich@analog.com", "time": "Mon Apr 28 02:13:38 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:26 2008 -0700" }, "message": "mm/nommu.c: return 0 from kobjsize with invalid objects\n\nDon\u0027t perform kobjsize operations on objects the kernel doesn\u0027t manage.\n\nOn Blackfin, drivers can get dma coherent memory by calling a function\ndma_alloc_coherent(). We do this in nommu by configuring a chunk of uncached\nmemory at the top of memory.\n\nSince we don\u0027t want the kernel to use the uncached memory, we lie to the\nkernel, and tell it that it\u0027s max memory is between 0, and the start of the\nuncached dma coherent section.\n\nthis all works well, until this memory gets exposed into userspace (with a\nframe buffer), when you look at the process\u0027s maps, it shows the framebuf:\n\nroot:/proc\u003e cat maps\n[snip]\n03f0ef00-03f34700 rw-p 00000000 1f:00 192 /dev/fb0\nroot:/proc\u003e\n\nThis is outside the \"normal\" range for the kernel. When the kernel tries to\nfind the size of this object (when you run ps), it dies in nommu.c in\nkobjsize.\n\nBUG_ON(page-\u003eindex \u003e\u003d MAX_ORDER);\n\nsince the page we are referring to is outside what the kernel thinks is it\u0027s\nmax valid memory.\n\nroot:~\u003e while [ 1 ]; ps \u003e /dev/null; done\nkernel BUG at mm/nommu.c:119!\nKernel panic - not syncing: BUG!\n\nWe fixed this by adding a check to reject out of range object pointers as it\nalready does that for NULL pointers.\n\nSigned-off-by: Michael Hennerich \u003cMichael.Hennerich@analog.com\u003e\nSigned-off-by: Robin Getz \u003crgetz@blackfin.uclinux.org\u003e\nAcked-by: David Howells \u003cdhowells@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "468fd62ed9090ccbe872489df5d0d099510df4b5", "tree": "017ab340cac72bf86423f181f085e7bc39fd70ea", "parents": [ "8cece85ec744bdc7ea0fc2d33f65b3f031c28468" ], "author": { "name": "Dimitri Sivanich", "email": "sivanich@sgi.com", "time": "Mon Apr 28 02:13:37 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:26 2008 -0700" }, "message": "vmstats: add cond_resched() to refresh_cpu_vm_stats()\n\nWe\u0027ve found that it can take quite a bit of time (100\u0027s of usec) to get\nthrough the zone loop in refresh_cpu_vm_stats().\n\nAdding a cond_resched() to allow other threads to run in the non-preemptive\ncase.\n\nSigned-off-by: Dimitri Sivanich \u003csivanich@sgi.com\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2309f9e6fe3f1de661eab9613f7903ab4420c753", "tree": "283c26f2cd9f42bd63e7b514278aafe7c53a4dc0", "parents": [ "97d87c9710bc6c5f2585fb9dc58f5bedbe996f10" ], "author": { "name": "Pavel Machek", "email": "pavel@ucw.cz", "time": "Mon Apr 28 02:13:35 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:26 2008 -0700" }, "message": "mm/page_alloc.c: remove hand-coded get_order()\n\nRemove hand-coded get_order() from page_alloc.c.\n\nSigned-off-by: Pavel Machek \u003cpavel@suse.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "97d87c9710bc6c5f2585fb9dc58f5bedbe996f10", "tree": "60d6b2adc950c55330504fc472464339328d7ef7", "parents": [ "0c0a4a517a31e05efb38304668198a873bfec6ca" ], "author": { "name": "Li Zefan", "email": "lizf@cn.fujitsu.com", "time": "Mon Apr 28 02:13:35 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:26 2008 -0700" }, "message": "oom_kill: remove unused parameter in badness()\n\nIn commit 4c4a22148909e4c003562ea7ffe0a06e26919e3c, we moved the\nmemcontroller-related code from badness() to select_bad_process(), so the\nparameter \u0027mem\u0027 in badness() is unused now.\n\nSigned-off-by: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "0c0a4a517a31e05efb38304668198a873bfec6ca", "tree": "3d02fe9dbf160cd5d328c1e2cf4b40ce37426c5f", "parents": [ "86f6dae1377523689bd8468fed2f2dd180fc0560" ], "author": { "name": "Yasunori Goto", "email": "y-goto@jp.fujitsu.com", "time": "Mon Apr 28 02:13:34 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:26 2008 -0700" }, "message": "memory hotplug: free memmaps allocated by bootmem\n\nThis patch is to free memmaps which is allocated by bootmem.\n\nFreeing usemap is not necessary. The pages of usemap may be necessary for\nother sections.\n\nIf removing section is last section on the node, its section is the final user\nof usemap page. (usemaps are allocated on its section by previous patch.) But\nit shouldn\u0027t be freed too, because the section must be logical offline state\nwhich all pages are isolated against page allocater. If it is freed, page\nalloctor may use it which will be removed physically soon. It will be\ndisaster. So, this patch keeps it as it is.\n\nSigned-off-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: Badari Pulavarty \u003cpbadari@us.ibm.com\u003e\nCc: Yinghai Lu \u003cyhlu.kernel@gmail.com\u003e\nCc: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "86f6dae1377523689bd8468fed2f2dd180fc0560", "tree": "90c4495ae947627d610f13c8a185fd16358bc14e", "parents": [ "e70260aabea3af2a84b951e75166dcebe689b88e" ], "author": { "name": "Yasunori Goto", "email": "y-goto@jp.fujitsu.com", "time": "Mon Apr 28 02:13:33 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:25 2008 -0700" }, "message": "memory hotplug: allocate usemap on the section with pgdat\n\nUsemaps are allocated on the section which has pgdat by this.\n\nBecause usemap size is very small, many other sections usemaps are allocated\non only one page. If a section has usemap, it can\u0027t be removed until removing\nother sections. This dependency is not desirable for memory removing.\n\nPgdat has similar feature. When a section has pgdat area, it must be the last\nsection for removing on the node. So, if section A has pgdat and section B\nhas usemap for section A, Both sections can\u0027t be removed due to dependency\neach other.\n\nTo solve this issue, this patch collects usemap on same section with pgdat.\nIf other sections doesn\u0027t have any dependency, this section will be able to be\nremoved finally.\n\nSigned-off-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: Badari Pulavarty \u003cpbadari@us.ibm.com\u003e\nCc: Yinghai Lu \u003cyhlu.kernel@gmail.com\u003e\nCc: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e70260aabea3af2a84b951e75166dcebe689b88e", "tree": "196dc5f2804f9f5496f51954330a036e3a2762d8", "parents": [ "9d99217a02a06a7cc83f065b73e976970970c58c" ], "author": { "name": "Yasunori Goto", "email": "y-goto@jp.fujitsu.com", "time": "Mon Apr 28 02:13:32 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:25 2008 -0700" }, "message": "memory hotplug: make alloc_bootmem_section()\n\nalloc_bootmem_section() can allocate specified section\u0027s area. This is used\nfor usemap to keep same section with pgdat by later patch.\n\nSigned-off-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: Badari Pulavarty \u003cpbadari@us.ibm.com\u003e\nCc: Yinghai Lu \u003cyhlu.kernel@gmail.com\u003e\nCc: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9d99217a02a06a7cc83f065b73e976970970c58c", "tree": "14d270c37701f9ae621c9cd8b076e207ee86e5d0", "parents": [ "04753278769f3b6c3b79a080edb52f21d83bf6e2" ], "author": { "name": "Yasunori Goto", "email": "y-goto@jp.fujitsu.com", "time": "Mon Apr 28 02:13:32 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:25 2008 -0700" }, "message": "memory hotplug: align memmap to page size\n\nTo free memmap easier, this patch aligns it to page size. Bootmem allocater\nmay mix some objects in one pages. It\u0027s not good for freeing memmap of memory\nhot-remove.\n\nSigned-off-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: Badari Pulavarty \u003cpbadari@us.ibm.com\u003e\nCc: Yinghai Lu \u003cyhlu.kernel@gmail.com\u003e\nCc: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "04753278769f3b6c3b79a080edb52f21d83bf6e2", "tree": "0dff4088b44016b6d04930b2fc09419412821aa2", "parents": [ "7f2e9525ba55b1c42ad6c4a5a59d7eb7bdd9be72" ], "author": { "name": "Yasunori Goto", "email": "y-goto@jp.fujitsu.com", "time": "Mon Apr 28 02:13:31 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:25 2008 -0700" }, "message": "memory hotplug: register section/node id to free\n\nThis patch set is to free pages which is allocated by bootmem for\nmemory-hotremove. Some structures of memory management are allocated by\nbootmem. ex) memmap, etc.\n\nTo remove memory physically, some of them must be freed according to\ncircumstance. This patch set makes basis to free those pages, and free\nmemmaps.\n\nBasic my idea is using remain members of struct page to remember information\nof users of bootmem (section number or node id). When the section is\nremoving, kernel can confirm it. By this information, some issues can be\nsolved.\n\n 1) When the memmap of removing section is allocated on other\n section by bootmem, it should/can be free.\n 2) When the memmap of removing section is allocated on the\n same section, it shouldn\u0027t be freed. Because the section has to be\n logical memory offlined already and all pages must be isolated against\n page allocater. If it is freed, page allocator may use it which will\n be removed physically soon.\n 3) When removing section has other section\u0027s memmap,\n kernel will be able to show easily which section should be removed\n before it for user. (Not implemented yet)\n 4) When the above case 2), the page isolation will be able to check and skip\n memmap\u0027s page when logical memory offline (offline_pages()).\n Current page isolation code fails in this case because this page is\n just reserved page and it can\u0027t distinguish this pages can be\n removed or not. But, it will be able to do by this patch.\n (Not implemented yet.)\n 5) The node information like pgdat has similar issues. But, this\n will be able to be solved too by this.\n (Not implemented yet, but, remembering node id in the pages.)\n\nFortunately, current bootmem allocator just keeps PageReserved flags,\nand doesn\u0027t use any other members of page struct. The users of\nbootmem doesn\u0027t use them too.\n\nThis patch:\n\nThis is to register information which is node or section\u0027s id. Kernel can\ndistinguish which node/section uses the pages allcated by bootmem. This is\nbasis for hot-remove sections or nodes.\n\nSigned-off-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: Badari Pulavarty \u003cpbadari@us.ibm.com\u003e\nCc: Yinghai Lu \u003cyhlu.kernel@gmail.com\u003e\nCc: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7f2e9525ba55b1c42ad6c4a5a59d7eb7bdd9be72", "tree": "10792496f50b4b0fed8a2c356a8819ae8f9ce47f", "parents": [ "8fe627ec5b7c47b1654dff50536d9709863295a3" ], "author": { "name": "Gerald Schaefer", "email": "gerald.schaefer@de.ibm.com", "time": "Mon Apr 28 02:13:29 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:25 2008 -0700" }, "message": "hugetlbfs: common code update for s390\n\nHuge ptes have a special type on s390 and cannot be handled with the standard\npte functions in certain cases, e.g. because of a different location of the\ninvalid bit. This patch adds some new architecture- specific functions to\nhugetlb common code, as a prerequisite for the s390 large page support.\n\nThis won\u0027t affect other architectures in functionality, but I need to add some\nnew dummy inline functions to the headers.\n\nAcked-by: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nSigned-off-by: Gerald Schaefer \u003cgerald.schaefer@de.ibm.com\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: \"Luck, Tony\" \u003ctony.luck@intel.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8fe627ec5b7c47b1654dff50536d9709863295a3", "tree": "78511553eb4111224e89ef02a9436d0db382694b", "parents": [ "6d779079bfd1196e077bb1d0a906c37ae770b102" ], "author": { "name": "Gerald Schaefer", "email": "gerald.schaefer@de.ibm.com", "time": "Mon Apr 28 02:13:28 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:25 2008 -0700" }, "message": "hugetlbfs: add missing TLB flush to hugetlb_cow()\n\nA cow break on a hugetlbfs page with page_count \u003e 1 will set a new pte with\nset_huge_pte_at(), w/o any tlb flush operation. The old pte will remain in\nthe tlb and subsequent write access to the page will result in a page fault\nloop, for as long as it may take until the tlb is flushed from somewhere else.\n This patch introduces an architecture-specific huge_ptep_clear_flush()\nfunction, which is called before the the set_huge_pte_at() in hugetlb_cow().\n\nATTENTION: This is just a nop on all architectures for now, the s390\nimplementation will come with our large page patch later. Other architectures\nshould define their own huge_ptep_clear_flush() if needed.\n\nAcked-by: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nSigned-off-by: Gerald Schaefer \u003cgerald.schaefer@de.ibm.com\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: \"Luck, Tony\" \u003ctony.luck@intel.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "71fe804b6d56d6a7aed680e096901434cef6a2c3", "tree": "3dd437e09fe6ee57644c72c79e08c562d4bb6389", "parents": [ "3f226aa1cbc006f9d90f22084f519ad2a1286cd8" ], "author": { "name": "Lee Schermerhorn", "email": "lee.schermerhorn@hp.com", "time": "Mon Apr 28 02:13:26 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:25 2008 -0700" }, "message": "mempolicy: use struct mempolicy pointer in shmem_sb_info\n\nThis patch replaces the mempolicy mode, mode_flags, and nodemask in the\nshmem_sb_info struct with a struct mempolicy pointer, initialized to NULL.\nThis removes dependency on the details of mempolicy from shmem.c and hugetlbfs\ninode.c and simplifies the interfaces.\n\nmpol_parse_str() in mempolicy.c is changed to return, via a pointer to a\npointer arg, a struct mempolicy pointer on success. For MPOL_DEFAULT, the\nreturned pointer is NULL. Further, mpol_parse_str() now takes a \u0027no_context\u0027\nargument that causes the input nodemask to be stored in the w.user_nodemask of\nthe created mempolicy for use when the mempolicy is installed in a tmpfs inode\nshared policy tree. At that time, any cpuset contextualization is applied to\nthe original input nodemask. This preserves the previous behavior where the\ninput nodemask was stored in the superblock. We can think of the returned\nmempolicy as \"context free\".\n\nBecause mpol_parse_str() is now calling mpol_new(), we can remove from\nmpol_to_str() the semantic checks that mpol_new() already performs.\n\nAdd \u0027no_context\u0027 parameter to mpol_to_str() to specify that it should format\nthe nodemask in w.user_nodemask for \u0027bind\u0027 and \u0027interleave\u0027 policies.\n\nChange mpol_shared_policy_init() to take a pointer to a \"context free\" struct\nmempolicy and to create a new, \"contextualized\" mempolicy using the mode,\nmode_flags and user_nodemask from the input mempolicy.\n\n Note: we know that the mempolicy passed to mpol_to_str() or\n mpol_shared_policy_init() from a tmpfs superblock is \"context free\". This\n is currently the only instance thereof. However, if we found more uses for\n this concept, and introduced any ambiguity as to whether a mempolicy was\n context free or not, we could add another internal mode flag to identify\n context free mempolicies. Then, we could remove the \u0027no_context\u0027 argument\n from mpol_to_str().\n\nAdded shmem_get_sbmpol() to return a reference counted superblock mempolicy,\nif one exists, to pass to mpol_shared_policy_init(). We must add the\nreference under the sb stat_lock to prevent races with replacement of the mpol\nby remount. This reference is removed in mpol_shared_policy_init().\n\n[akpm@linux-foundation.org: build fix]\n[akpm@linux-foundation.org: another build fix]\n[akpm@linux-foundation.org: yet another build fix]\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3f226aa1cbc006f9d90f22084f519ad2a1286cd8", "tree": "e54a87abb19f9dea184f4c17c4c8532d3d715de8", "parents": [ "095f1fc4ebf36c64fddf9b6db29b1ab5517378e6" ], "author": { "name": "Lee Schermerhorn", "email": "lee.schermerhorn@hp.com", "time": "Mon Apr 28 02:13:24 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:25 2008 -0700" }, "message": "mempolicy: support mpol\u003dlocal tmpfs mount option\n\nFor tmpfs/shmem shared policies, MPOL_DEFAULT is not necessarily equivalent to\n\"local allocation\". Because shared policies are at the same \"scope\" level\n[see Documentation/vm/numa_memory_policy.txt], as vma policies MPOL_DEFAULT\nmeans \"fall back to current task policy\".\n\nThis patch extends the memory policy string parsing function to display\n\"local\" for MPOL_PREFERRED + MPOL_F_LOCAL. This allows one to specify local\nallocation as the default policy for shared memory areas via the tmpfs mpol\nmount option, regardless of the current task\u0027s policy.\n\nAlso, \"local\" is now displayed for this policy. This patch allows us to\naccept the same input format as the display.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "095f1fc4ebf36c64fddf9b6db29b1ab5517378e6", "tree": "39aae9d5b05d8501d1794e92c6115331c0a40848", "parents": [ "2291990ab36b4b2d8a81b1f92e7a046e51632a60" ], "author": { "name": "Lee Schermerhorn", "email": "lee.schermerhorn@hp.com", "time": "Mon Apr 28 02:13:23 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:24 2008 -0700" }, "message": "mempolicy: rework shmem mpol parsing and display\n\nmm/shmem.c currently contains functions to parse and display memory policy\nstrings for the tmpfs \u0027mpol\u0027 mount option. Move this to mm/mempolicy.c with\nthe rest of the mempolicy support. With subsequent patches, we\u0027ll be able to\nremove knowledge of the details [mode, flags, policy, ...] completely from\nshmem.c\n\n1) replace shmem_parse_mpol() in mm/shmem.c with mpol_parse_str() in\n mm/mempolicy.c. Rework to use the policy_types[] array [used by\n mpol_to_str()] to look up mode by name.\n\n2) use mpol_to_str() to format policy for shmem_show_mpol(). mpol_to_str()\n expects a pointer to a struct mempolicy, so temporarily construct one.\n This will be replaced with a reference to a struct mempolicy in the tmpfs\n superblock in a subsequent patch.\n\n NOTE 1: I changed mpol_to_str() to use a colon \u0027:\u0027 rather than an equal\n sign \u0027\u003d\u0027 as the nodemask delimiter to match mpol_parse_str() and the\n tmpfs/shmem mpol mount option formatting that now uses mpol_to_str(). This\n is a user visible change to numa_maps, but then the addition of the mode\n flags already changed the display. It makes sense to me to have the mounts\n and numa_maps display the policy in the same format. However, if anyone\n objects strongly, I can pass the desired nodemask delimeter as an arg to\n mpol_to_str().\n\n Note 2: Like show_numa_map(), I don\u0027t check the return code from\n mpol_to_str(). I do use a longer buffer than the one provided by\n show_numa_map(), which seems to have sufficed so far.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2291990ab36b4b2d8a81b1f92e7a046e51632a60", "tree": "b5b6b8ca9c92bc3c84cd7e7aefb5010d3793db4d", "parents": [ "fc36b8d3d819047eb4d23ca079fb4d3af20ff076" ], "author": { "name": "Lee Schermerhorn", "email": "lee.schermerhorn@hp.com", "time": "Mon Apr 28 02:13:22 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:24 2008 -0700" }, "message": "mempolicy: clean-up mpol-to-str() mempolicy formatting\n\nmpol-to-str() formats memory policies into printable strings. Currently this\nis only used to display \"numa_maps\". A subsequent patch will use\nmpol_to_str() for formatting tmpfs [shmem] mpol mount options, allowing us to\nremove essentially duplicate code in mm/shmem.c. This patch cleans up\nmpol_to_str() generally and in preparation for that patch.\n\n1) show_numa_maps() is not checking the return code from mpol_to_str().\n There\u0027s not a lot we can do in this context if mpol_to_str() did return the\n error [insufficient space in buffer]. Proposed \"solution\": just check,\n under DEBUG_VM, that callers are providing sufficient buffer space for the\n policy, flags, and a few nodes. This way, we\u0027ll get some display.\n show_numa_maps() is providing a 50-byte buffer, so it won\u0027t trip this\n check. 50-bytes should be sufficient unless one has a large number of\n nodes in a very sparse nodemask.\n\n2) The display of the new mode flags [\"static\" \u0026 \"relative\"] was set up to\n display multiple flags, separated by a \"bar\" \u0027|\u0027. However, this support is\n incomplete--e.g., need_bar was never incremented; and currently, these two\n flags are mutually exclusive. So remove the \"bar\" support, for now, and\n only display one flag.\n\n3) Use snprint() to format flags, so as not to overflow the buffer. Not\n that it\u0027s ever happed, AFAIK.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "fc36b8d3d819047eb4d23ca079fb4d3af20ff076", "tree": "65ee215a6bdca1e8d4ac4b57525445d7d1829c1d", "parents": [ "53f2556b6792ed99fde965f5e061749edd455623" ], "author": { "name": "Lee Schermerhorn", "email": "lee.schermerhorn@hp.com", "time": "Mon Apr 28 02:13:21 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:24 2008 -0700" }, "message": "mempolicy: use MPOL_F_LOCAL to Indicate Preferred Local Policy\n\nNow that we\u0027re using \"preferred local\" policy for system default, we need to\nmake this as fast as possible. Because of the variable size of the mempolicy\nstructure [based on size of nodemasks], the preferred_node may be in a\ndifferent cacheline from the mode. This can result in accessing an extra\ncacheline in the normal case of system default policy. Suspect this is the\ncause of an observed 2-3% slowdown in page fault testing relative to kernel\nwithout this patch series.\n\nTo alleviate this, use an internal mode flag, MPOL_F_LOCAL in the mempolicy\nflags member which is guaranteed [?] to be in the same cacheline as the mode\nitself.\n\nVerified that reworked mempolicy now performs slightly better on 25-rc8-mm1\nfor both anon and shmem segments with system default and vma [preferred local]\npolicy.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "53f2556b6792ed99fde965f5e061749edd455623", "tree": "82a679e33bc8c305297cbe4655be0dac24728907", "parents": [ "bea904d54d6faa92400f10c8ea3d3828b8e1eb93" ], "author": { "name": "Lee Schermerhorn", "email": "lee.schermerhorn@hp.com", "time": "Mon Apr 28 02:13:20 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:24 2008 -0700" }, "message": "mempolicy: mPOL_PREFERRED cleanups for \"local allocation\"\n\nHere are a couple of \"cleanups\" for MPOL_PREFERRED behavior when\nv.preferred_node \u003c 0 -- i.e., \"local allocation\":\n\n1) [do_]get_mempolicy() calls the now renamed get_policy_nodemask()\n to fetch the nodemask associated with a policy. Currently,\n get_policy_nodemask() returns the set of nodes with memory, when\n the policy \u0027mode\u0027 is \u0027PREFERRED, and the preferred_node is \u003c 0.\n Change to return an empty nodemask, as this is what was specified\n to achieve \"local allocation\".\n\n2) When a task is moved into a [new] cpuset, mpol_rebind_policy() is\n called to adjust any task and vma policy nodes to be valid in the\n new cpuset. However, when the policy is MPOL_PREFERRED, and the\n preferred_node is \u003c0, no rebind is necessary. The \"local allocation\"\n indication is valid in any cpuset. Existing code will \"do the right\n thing\" because node_remap() will just return the argument node when\n it is outside of the valid range of node ids. However, I think it is\n clearer and cleaner to skip the remap explicitly in this case.\n\n3) mpol_to_str() produces a printable, \"human readable\" string from a\n struct mempolicy. For MPOL_PREFERRED with preferred_node \u003c0, show\n \"local\", as this indicates local allocation, as the task migrates\n among nodes. Note that this matches the usage of \"local allocation\"\n in libnuma() and numactl. Without this change, I believe that node_set()\n [via set_bit()] will set bit 31, resulting in a misleading display.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "bea904d54d6faa92400f10c8ea3d3828b8e1eb93", "tree": "24966dd4dabadb4bb32aa1e00fae2c2168661229", "parents": [ "52cd3b074050dd664380b5e8cfc85d4a6ed8ad48" ], "author": { "name": "Lee Schermerhorn", "email": "lee.schermerhorn@hp.com", "time": "Mon Apr 28 02:13:18 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:24 2008 -0700" }, "message": "mempolicy: use MPOL_PREFERRED for system-wide default policy\n\nCurrently, when one specifies MPOL_DEFAULT via a NUMA memory policy API\n[set_mempolicy(), mbind() and internal versions], the kernel simply installs a\nNULL struct mempolicy pointer in the appropriate context: task policy, vma\npolicy, or shared policy. This causes any use of that policy to \"fall back\"\nto the next most specific policy scope.\n\nThe only use of MPOL_DEFAULT to mean \"local allocation\" is in the system\ndefault policy. This requires extra checks/cases for MPOL_DEFAULT in many\nmempolicy.c functions.\n\nThere is another, \"preferred\" way to specify local allocation via the APIs.\nThat is using the MPOL_PREFERRED policy mode with an empty nodemask.\nInternally, the empty nodemask gets converted to a preferred_node id of \u0027-1\u0027.\nAll internal usage of MPOL_PREFERRED will convert the \u0027-1\u0027 to the id of the\nnode local to the cpu where the allocation occurs.\n\nSystem default policy, except during boot, is hard-coded to \"local\nallocation\". By using the MPOL_PREFERRED mode with a negative value of\npreferred node for system default policy, MPOL_DEFAULT will never occur in the\n\u0027policy\u0027 member of a struct mempolicy. Thus, we can remove all checks for\nMPOL_DEFAULT when converting policy to a node id/zonelist in the allocation\npaths.\n\nIn slab_node() return local node id when policy pointer is NULL. No need to\nset a pol value to take the switch default. Replace switch default with\nBUG()--i.e., shouldn\u0027t happen.\n\nWith this patch MPOL_DEFAULT is only used in the APIs, including internal\ncalls to do_set_mempolicy() and in the display of policy in\n/proc/\u003cpid\u003e/numa_maps. It always means \"fall back\" to the the next most\nspecific policy scope. This simplifies the description of memory policies\nquite a bit, with no visible change in behavior.\n\nget_mempolicy() continues to return MPOL_DEFAULT and an empty nodemask when\nthe requested policy [task or vma/shared] is NULL. These are the values one\nwould supply via set_mempolicy() or mbind() to achieve that condition--default\nbehavior.\n\nThis patch updates Documentation to reflect this change.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "52cd3b074050dd664380b5e8cfc85d4a6ed8ad48", "tree": "fcfcf55c0e81376ea34919fab26e29bedd7f3b88", "parents": [ "a6020ed759404372e8be2b276e85e51735472cc9" ], "author": { "name": "Lee Schermerhorn", "email": "lee.schermerhorn@hp.com", "time": "Mon Apr 28 02:13:16 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:24 2008 -0700" }, "message": "mempolicy: rework mempolicy Reference Counting [yet again]\n\nAfter further discussion with Christoph Lameter, it has become clear that my\nearlier attempts to clean up the mempolicy reference counting were a bit of\noverkill in some areas, resulting in superflous ref/unref in what are usually\nfast paths. In other areas, further inspection reveals that I botched the\nunref for interleave policies.\n\nA separate patch, suitable for upstream/stable trees, fixes up the known\nerrors in the previous attempt to fix reference counting.\n\nThis patch reworks the memory policy referencing counting and, one hopes,\nsimplifies the code. Maybe I\u0027ll get it right this time.\n\nSee the update to the numa_memory_policy.txt document for a discussion of\nmemory policy reference counting that motivates this patch.\n\nSummary:\n\nLookup of mempolicy, based on (vma, address) need only add a reference for\nshared policy, and we need only unref the policy when finished for shared\npolicies. So, this patch backs out all of the unneeded extra reference\ncounting added by my previous attempt. It then unrefs only shared policies\nwhen we\u0027re finished with them, using the mpol_cond_put() [conditional put]\nhelper function introduced by this patch.\n\nNote that shmem_swapin() calls read_swap_cache_async() with a dummy vma\ncontaining just the policy. read_swap_cache_async() can call alloc_page_vma()\nmultiple times, so we can\u0027t let alloc_page_vma() unref the shared policy in\nthis case. To avoid this, we make a copy of any non-null shared policy and\nremove the MPOL_F_SHARED flag from the copy. This copy occurs before reading\na page [or multiple pages] from swap, so the overhead should not be an issue\nhere.\n\nI introduced a new static inline function \"mpol_cond_copy()\" to copy the\nshared policy to an on-stack policy and remove the flags that would require a\nconditional free. The current implementation of mpol_cond_copy() assumes that\nthe struct mempolicy contains no pointers to dynamically allocated structures\nthat must be duplicated or reference counted during copy.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "aab0b1029f0843756b68e0ed3ca983685bf43ed6", "tree": "95a0546c908a1c7a3bf1353f433ff1464faf68db", "parents": [ "45c4745af381851b0406d8e4db99e62e265691c2" ], "author": { "name": "Lee Schermerhorn", "email": "lee.schermerhorn@hp.com", "time": "Mon Apr 28 02:13:13 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:24 2008 -0700" }, "message": "mempolicy: mark shared policies for unref\n\nAs part of yet another rework of mempolicy reference counting, we want to be\nable to identify shared policies efficiently, because they have an extra ref\ntaken on lookup that needs to be removed when we\u0027re finished using the policy.\n\n Note: the extra ref is required because the policies are\n shared between tasks/processes and can be changed/freed\n by one task while another task is using them--e.g., for\n page allocation.\n\nBuilding on David Rientjes mempolicy \"mode flags\" enhancement, this patch\nindicates a \"shared\" policy by setting a new MPOL_F_SHARED flag in the flags\nmember of the struct mempolicy added by David. MPOL_F_SHARED, and any future\n\"internal mode flags\" are reserved from bit zero up, as they will never be\npassed in the upper bits of the mode argument of a mempolicy API.\n\nI set the MPOL_F_SHARED flag when the policy is installed in the shared policy\nrb-tree. Don\u0027t need/want to clear the flag when removing from the tree as the\nmempolicy is freed [unref\u0027d] internally to the sp_delete() function. However,\na task could hold another reference on this mempolicy from a prior lookup. We\nneed the MPOL_F_SHARED flag to stay put so that any tasks holding a ref will\nunref, eventually freeing, the mempolicy.\n\nA later patch in this series will introduce a function to conditionally unref\n[mpol_free] a policy. The MPOL_F_SHARED flag is one reason [currently the\nonly reason] to unref/free a policy via the conditional free.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "45c4745af381851b0406d8e4db99e62e265691c2", "tree": "d93f6f7b3d7eb3773aaa80444c56baff99e670d6", "parents": [ "ae4d8c16aa22775f5731677abb8a82f03cec877e" ], "author": { "name": "Lee Schermerhorn", "email": "lee.schermerhorn@hp.com", "time": "Mon Apr 28 02:13:12 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:24 2008 -0700" }, "message": "mempolicy: rename struct mempolicy \u0027policy\u0027 member to \u0027mode\u0027\n\nThe terms \u0027policy\u0027 and \u0027mode\u0027 are both used in various places to describe the\nsemantics of the value stored in the \u0027policy\u0027 member of struct mempolicy.\nFurthermore, the term \u0027policy\u0027 is used to refer to that member, to the entire\nstruct mempolicy and to the more abstract concept of the tuple consisting of a\n\"mode\" and an optional node or set of nodes. Recently, we have added \"mode\nflags\" that are passed in the upper bits of the \u0027mode\u0027 [or sometimes,\n\u0027policy\u0027] member of the numa APIs.\n\nI\u0027d like to resolve this confusion, which perhaps only exists in my mind, by\nrenaming the \u0027policy\u0027 member to \u0027mode\u0027 throughout, and fixing up the\nDocumentation. Man pages will be updated separately.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ae4d8c16aa22775f5731677abb8a82f03cec877e", "tree": "2d34c6fd334b51cc5f3265cd4ec26db758639b5c", "parents": [ "f4e53d910b7dde2685b177f1e7c3e3e0b4a42f7b" ], "author": { "name": "Lee Schermerhorn", "email": "lee.schermerhorn@hp.com", "time": "Mon Apr 28 02:13:11 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:24 2008 -0700" }, "message": "mempolicy: fixup Fallback for Default Shmem Policy\n\nget_vma_policy() is not handling fallback to task policy correctly when the\nget_policy() vm_op returns NULL. The NULL overwrites the \u0027pol\u0027 variable that\nwas holding the fallback task mempolicy. So, it was falling back directly to\nsystem default policy.\n\nFix get_vma_policy() to use only non-NULL policy returned from the vma\nget_policy op.\n\nshm_get_policy() was falling back to current task\u0027s mempolicy if the \"backing\nfile system\" [tmpfs vs hugetlbfs] does not support the get_policy vm_op and\nthe vma policy is null. This is incorrect for show_numa_maps() which is\nlikely querying the numa_maps of some task other than current. Remove this\nfallback.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f4e53d910b7dde2685b177f1e7c3e3e0b4a42f7b", "tree": "db4db3abbc0b63de88dabd13e9359ca86973935c", "parents": [ "846a16bf0fc80dc95a414ffce465e3cbf9680247" ], "author": { "name": "Lee Schermerhorn", "email": "lee.schermerhorn@hp.com", "time": "Mon Apr 28 02:13:10 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:23 2008 -0700" }, "message": "mempolicy: write lock mmap_sem while changing task mempolicy\n\nA read of /proc/\u003cpid\u003e/numa_maps holds the target task\u0027s mmap_sem for read\nwhile examining each vma\u0027s mempolicy. A vma\u0027s mempolicy can fall back to the\ntask\u0027s policy. However, the task could be changing it\u0027s task policy and free\nthe one that the show_numa_maps() is examining.\n\nTo prevent this, grab the mmap_sem for write when updating task mempolicy.\nPointed out to me by Christoph Lameter and extracted and reworked from\nChristoph\u0027s alternative mempol reference counting patch.\n\nThis is analogous to the way that do_mbind() and do_get_mempolicy() prevent\nraces between task\u0027s sharing an mm_struct [a.k.a. threads] setting and\nquerying a mempolicy for a particular address.\n\nNote: this is necessary, but not sufficient, to allow us to stop taking an\nextra reference on \"other task\u0027s mempolicy\" in get_vma_policy. Subsequent\npatches will complete this update, allowing us to simplify the tests for\nwhether we need to unref a mempolicy at various points in the code.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "846a16bf0fc80dc95a414ffce465e3cbf9680247", "tree": "45e03061c5e3d8242bf470509771926f37177415", "parents": [ "f0be3d32b05d3fea2fcdbbb81a39dac2a7163169" ], "author": { "name": "Lee Schermerhorn", "email": "lee.schermerhorn@hp.com", "time": "Mon Apr 28 02:13:09 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:23 2008 -0700" }, "message": "mempolicy: rename mpol_copy to mpol_dup\n\nThis patch renames mpol_copy() to mpol_dup() because, well, that\u0027s what it\ndoes. Like, e.g., strdup() for strings, mpol_dup() takes a pointer to an\nexisting mempolicy, allocates a new one and copies the contents.\n\nIn a later patch, I want to use the name mpol_copy() to copy the contents from\none mempolicy to another like, e.g., strcpy() does for strings.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f0be3d32b05d3fea2fcdbbb81a39dac2a7163169", "tree": "5794ce6a8befbce82cd3e44ff15fbf3bb5f2f3bf", "parents": [ "3b1163006332302117b1b2acf226d4014ff46525" ], "author": { "name": "Lee Schermerhorn", "email": "lee.schermerhorn@hp.com", "time": "Mon Apr 28 02:13:08 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:23 2008 -0700" }, "message": "mempolicy: rename mpol_free to mpol_put\n\nThis is a change that was requested some time ago by Mel Gorman. Makes sense\nto me, so here it is.\n\nNote: I retain the name \"mpol_free_shared_policy()\" because it actually does\nfree the shared_policy, which is NOT a reference counted object. However, ...\n\nThe mempolicy object[s] referenced by the shared_policy are reference counted,\nso mpol_put() is used to release the reference held by the shared_policy. The\nmempolicy might not be freed at this time, because some task attached to the\nshared object associated with the shared policy may be in the process of\nallocating a page based on the mempolicy. In that case, the task performing\nthe allocation will hold a reference on the mempolicy, obtained via\nmpol_shared_policy_lookup(). The mempolicy will be freed when all tasks\nholding such a reference have called mpol_put() for the mempolicy.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3b1163006332302117b1b2acf226d4014ff46525", "tree": "c9e43179620cfe612ce57795cb0b1e1ceb2c9d1b", "parents": [ "122c7a59055c77434118d7dd4dff4b625d4a2c15" ], "author": { "name": "Adam Litke", "email": "agl@us.ibm.com", "time": "Mon Apr 28 02:13:06 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:23 2008 -0700" }, "message": "Subject: [PATCH] hugetlb: vmstat events for huge page allocations\n\nAllocating huge pages directly from the buddy allocator is not guaranteed to\nsucceed. Success depends on several factors (such as the amount of physical\nmemory available and the level of fragmentation). With the addition of\ndynamic hugetlb pool resizing, allocations can occur much more frequently.\nFor these reasons it is desirable to keep track of huge page allocation\nsuccesses and failures.\n\nAdd two new vmstat entries to track huge page allocations that succeed and\nfail. The presence of the two entries is contingent upon CONFIG_HUGETLB_PAGE\nbeing enabled.\n\n[akpm@linux-foundation.org: reduced ifdeffery]\nSigned-off-by: Adam Litke \u003cagl@us.ibm.com\u003e\nSigned-off-by: Eric Munson \u003cebmunson@us.ibm.com\u003e\nTested-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "70688e4dd1647f0ceb502bbd5964fa344c5eb411", "tree": "e0bd8c3b4b6050c067a453d800c2e87948d1abaf", "parents": [ "30afcb4bd2762fa4b87b17ada9500aa46dc10b1b" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Mon Apr 28 02:13:02 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:23 2008 -0700" }, "message": "xip: support non-struct page backed memory\n\nConvert XIP to support non-struct page backed memory, using VM_MIXEDMAP for\nthe user mappings.\n\nThis requires the get_xip_page API to be changed to an address based one.\nImprove the API layering a little bit too, while we\u0027re here.\n\nThis is required in order to support XIP filesystems on memory that isn\u0027t\nbacked with struct page (but memory with struct page is still supported too).\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nAcked-by: Carsten Otte \u003ccotte@de.ibm.com\u003e\nCc: Jared Hulbert \u003cjaredeh@gmail.com\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "423bad600443c590f34ed7ce357591f76f48f137", "tree": "79487f811bf1097f2592c4d20f688d1b1ec41e25", "parents": [ "7e675137a8e1a4d45822746456dd389b65745bf6" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Mon Apr 28 02:13:01 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:23 2008 -0700" }, "message": "mm: add vm_insert_mixed\n\nvm_insert_mixed will insert either a raw pfn or a refcounted struct page into\nthe page tables, depending on whether vm_normal_page() will return the page or\nnot. With the introduction of the new pte bit, this is now a too tricky for\ndrivers to be doing themselves.\n\nfilemap_xip uses this in a subsequent patch.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Jared Hulbert \u003cjaredeh@gmail.com\u003e\nCc: Carsten Otte \u003ccotte@de.ibm.com\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7e675137a8e1a4d45822746456dd389b65745bf6", "tree": "5df01d23ea1b6b212d18f2136ff82913fcbe7718", "parents": [ "b379d790197cdf8a95fb67507d75a24ac0a1678d" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Mon Apr 28 02:13:00 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:23 2008 -0700" }, "message": "mm: introduce pte_special pte bit\n\ns390 for one, cannot implement VM_MIXEDMAP with pfn_valid, due to their memory\nmodel (which is more dynamic than most). Instead, they had proposed to\nimplement it with an additional path through vm_normal_page(), using a bit in\nthe pte to determine whether or not the page should be refcounted:\n\nvm_normal_page()\n{\n\t...\n if (unlikely(vma-\u003evm_flags \u0026 (VM_PFNMAP|VM_MIXEDMAP))) {\n if (vma-\u003evm_flags \u0026 VM_MIXEDMAP) {\n#ifdef s390\n\t\t\tif (!mixedmap_refcount_pte(pte))\n\t\t\t\treturn NULL;\n#else\n if (!pfn_valid(pfn))\n return NULL;\n#endif\n goto out;\n }\n\t...\n}\n\nThis is fine, however if we are allowed to use a bit in the pte to determine\nrefcountedness, we can use that to _completely_ replace all the vma based\nschemes. So instead of adding more cases to the already complex vma-based\nscheme, we can have a clearly seperate and simple pte-based scheme (and get\nslightly better code generation in the process):\n\nvm_normal_page()\n{\n#ifdef s390\n\tif (!mixedmap_refcount_pte(pte))\n\t\treturn NULL;\n\treturn pte_page(pte);\n#else\n\t...\n#endif\n}\n\nAnd finally, we may rather make this concept usable by any architecture rather\nthan making it s390 only, so implement a new type of pte state for this.\nUnfortunately the old vma based code must stay, because some architectures may\nnot be able to spare pte bits. This makes vm_normal_page a little bit more\nugly than we would like, but the 2 cases are clearly seperate.\n\nSo introduce a pte_special pte state, and use it in mm/memory.c. It is\ncurrently a noop for all architectures, so this doesn\u0027t actually result in any\ncompiled code changes to mm/memory.o.\n\nBTW:\nI haven\u0027t put vm_normal_page() into arch code as-per an earlier suggestion.\nThe reason is that, regardless of where vm_normal_page is actually\nimplemented, the *abstraction* is still exactly the same. Also, while it\ndepends on whether the architecture has pte_special or not, that is the\nonly two possible cases, and it really isn\u0027t an arch specific function --\nthe role of the arch code should be to provide primitive functions and\naccessors with which to build the core code; pte_special does that. We do\nnot want architectures to know or care about vm_normal_page itself, and\nwe definitely don\u0027t want them being able to invent something new there\nout of sight of mm/ code. If we made vm_normal_page an arch function, then\nwe have to make vm_insert_mixed (next patch) an arch function too. So I\ndon\u0027t think moving it to arch code fundamentally improves any abstractions,\nwhile it does practically make the code more difficult to follow, for both\nmm and arch developers, and easier to misuse.\n\n[akpm@linux-foundation.org: build fix]\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nAcked-by: Carsten Otte \u003ccotte@de.ibm.com\u003e\nCc: Jared Hulbert \u003cjaredeh@gmail.com\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b379d790197cdf8a95fb67507d75a24ac0a1678d", "tree": "8ea36c9a0766aca3cfd69cd33aa8a5d2ca8dd2d4", "parents": [ "214e471ff99064726b2d8af3aa0e24a73c775531" ], "author": { "name": "Jared Hulbert", "email": "jaredeh@gmail.com", "time": "Mon Apr 28 02:12:58 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:22 2008 -0700" }, "message": "mm: introduce VM_MIXEDMAP\n\nThis series introduces some important infrastructure work. The overall result\nis that:\n\n1. We now support XIP backed filesystems using memory that have no\n struct page allocated to them. And patches 6 and 7 actually implement\n this for s390.\n\n This is pretty important in a number of cases. As far as I understand,\n in the case of virtualisation (eg. s390), each guest may mount a\n readonly copy of the same filesystem (eg. the distro). Currently,\n guests need to allocate struct pages for this image. So if you have\n 100 guests, you already need to allocate more memory for the struct\n pages than the size of the image. I think. (Carsten?)\n\n For other (eg. embedded) systems, you may have a very large non-\n volatile filesystem. If you have to have struct pages for this, then\n your RAM consumption will go up proportionally to fs size. Even\n though it is just a small proportion, the RAM can be much more costly\n eg in terms of power, so every KB less that Linux uses makes it more\n attractive to a lot of these guys.\n\n2. VM_MIXEDMAP allows us to support mappings where you actually do want\n to refcount _some_ pages in the mapping, but not others, and support\n COW on arbitrary (non-linear) mappings. Jared needs this for his NVRAM\n filesystem in progress. Future iterations of this filesystem will\n most likely want to migrate pages between pagecache and XIP backing,\n which is where the requirement for mixed (some refcounted, some not)\n comes from.\n\n3. pte_special also has a peripheral usage that I need for my lockless\n get_user_pages patch. That was shown to speed up \"oltp\" on db2 by\n 10% on a 2 socket system, which is kind of significant because they\n scrounge for months to try to find 0.1% improvement on these\n workloads. I\u0027m hoping we might finally be faster than AIX on\n pSeries with this :). My reference to lockless get_user_pages is not\n meant to justify this patchset (which doesn\u0027t include lockless gup),\n but just to show that pte_special is not some s390 specific thing that\n should be hidden in arch code or xip code: I definitely want to use it\n on at least x86 and powerpc as well.\n\nThis patch:\n\nIntroduce a new type of mapping, VM_MIXEDMAP. This is unlike VM_PFNMAP in\nthat it can support COW mappings of arbitrary ranges including ranges without\nstruct page *and* ranges with a struct page that we actually want to refcount\n(PFNMAP can only support COW in those cases where the un-COW-ed translations\nare mapped linearly in the virtual address, and can only support non\nrefcounted ranges).\n\nVM_MIXEDMAP achieves this by refcounting all pfn_valid pages, and not\nrefcounting !pfn_valid pages (which is not an option for VM_PFNMAP, because it\nneeds to avoid refcounting pfn_valid pages eg. for /dev/mem mappings).\n\nSigned-off-by: Jared Hulbert \u003cjaredeh@gmail.com\u003e\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nAcked-by: Carsten Otte \u003ccotte@de.ibm.com\u003e\nCc: Jared Hulbert \u003cjaredeh@gmail.com\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e20b8cca760ed2a6abcfe37ef56f2306790db648", "tree": "85e5610364f73da193ee781be61710fddfbe045f", "parents": [ "97965478a66fbdf0f4ad5e4ecc4828f0cb548a45" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Mon Apr 28 02:12:55 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:22 2008 -0700" }, "message": "PAGEFLAGS_EXTENDED and separate page flags for Head and Tail\n\nHaving separate page flags for the head and the tail of a compound page allows\nthe compiler to use bitops instead of operations on a word to check for a tail\npage. That is f.e. important for virt_to_head_page() which is used in\nvarious critical code paths (kfree for example):\n\nCode for PageTail(page)\n\nBefore:\n\n mov (%rdi),%rdx\t\tpage-\u003eflags\n mov %rdx,%rax\t\t3 bytes\n and $0x12000,%eax\t\t5 bytes\n cmp $0x12000,%rax\t\t6 bytes\n je 897 \u003ckfree+0xa7\u003e\n\nAfter:\n\n mov (%rdi),%rax\n test $0x40,%ah\t\t\t(3 bytes)\n jne 887 \u003ckfree+0x97\u003e\n\nSo we go from 14 bytes to 3 bytes and from 3 instructions to one. From the\nuse of 2 registers we go to none.\n\nWe can only use page flags for this if we have page flags available. This\npatch introduces CONFIG_PAGEFLAGS_EXTENDED that is set if pageflags are not\nscarce due to SPARSEMEM using page flags for its sectionid on 32 bit NUMA\nplatforms.\n\nAdditional page flag definitions can be added to the CONFIG_PAGEFLAGS_EXTENDED\nsection in page-flags.h if the functionality depends on PAGEFLAGS_EXTENDED or\nif more page flag overlapping tricks are used for the !PAGEFLAGS_EXTENDED\nfallback (the upcoming virtual compound patch may hook in here and Rik\u0027s/Lee\u0027s\nadditional page flags to solve the reclaim issues could also be added there\n[hint... hint... where are these patchsets?]).\n\nAvoiding the overlaying of Pg_reclaim also clears the way for possible use of\ncompound pages for the pagecache or on the LRU.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "0a128b2b1a5e8ebce0260e3345812ee70daccc7f", "tree": "a2ce711ea77ef4677cad4f613112b8d7b88b7e28", "parents": [ "d60cd46bbdc5a79d9a177e40009f960e44f0e334" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Mon Apr 28 02:12:52 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:22 2008 -0700" }, "message": "pageflags: eliminate PG_xxx aliases\n\nRemove aliases of PG_xxx. We can easily drop those now and alias by\nspecifying the PG_xxx flag in the macro that generates the functions.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Andy Whitcroft \u003capw@shadowen.org\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Jeremy Fitzhardinge \u003cjeremy@goop.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2301696932b55e2ea2085cefc84f7b94fa2dd54b", "tree": "4a564951b4bd34feee922e59cac12962ac0f73c8", "parents": [ "a10aa579878fc6f9cd17455067380bbdf1d53c91" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Mon Apr 28 02:12:42 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:21 2008 -0700" }, "message": "vmallocinfo: add caller information\n\nAdd caller information so that /proc/vmallocinfo shows where the allocation\nrequest for a slice of vmalloc memory originated.\n\nResults in output like this:\n\n0xffffc20000000000-0xffffc20000801000 8392704 alloc_large_system_hash+0x127/0x246 pages\u003d2048 vmalloc vpages\n0xffffc20000801000-0xffffc20000806000 20480 alloc_large_system_hash+0x127/0x246 pages\u003d4 vmalloc\n0xffffc20000806000-0xffffc20000c07000 4198400 alloc_large_system_hash+0x127/0x246 pages\u003d1024 vmalloc vpages\n0xffffc20000c07000-0xffffc20000c0a000 12288 alloc_large_system_hash+0x127/0x246 pages\u003d2 vmalloc\n0xffffc20000c0a000-0xffffc20000c0c000 8192 acpi_os_map_memory+0x13/0x1c phys\u003dcff68000 ioremap\n0xffffc20000c0c000-0xffffc20000c0f000 12288 acpi_os_map_memory+0x13/0x1c phys\u003dcff64000 ioremap\n0xffffc20000c10000-0xffffc20000c15000 20480 acpi_os_map_memory+0x13/0x1c phys\u003dcff65000 ioremap\n0xffffc20000c16000-0xffffc20000c18000 8192 acpi_os_map_memory+0x13/0x1c phys\u003dcff69000 ioremap\n0xffffc20000c18000-0xffffc20000c1a000 8192 acpi_os_map_memory+0x13/0x1c phys\u003dfed1f000 ioremap\n0xffffc20000c1a000-0xffffc20000c1c000 8192 acpi_os_map_memory+0x13/0x1c phys\u003dcff68000 ioremap\n0xffffc20000c1c000-0xffffc20000c1e000 8192 acpi_os_map_memory+0x13/0x1c phys\u003dcff68000 ioremap\n0xffffc20000c1e000-0xffffc20000c20000 8192 acpi_os_map_memory+0x13/0x1c phys\u003dcff68000 ioremap\n0xffffc20000c20000-0xffffc20000c22000 8192 acpi_os_map_memory+0x13/0x1c phys\u003dcff68000 ioremap\n0xffffc20000c22000-0xffffc20000c24000 8192 acpi_os_map_memory+0x13/0x1c phys\u003dcff68000 ioremap\n0xffffc20000c24000-0xffffc20000c26000 8192 acpi_os_map_memory+0x13/0x1c phys\u003de0081000 ioremap\n0xffffc20000c26000-0xffffc20000c28000 8192 acpi_os_map_memory+0x13/0x1c phys\u003de0080000 ioremap\n0xffffc20000c28000-0xffffc20000c2d000 20480 alloc_large_system_hash+0x127/0x246 pages\u003d4 vmalloc\n0xffffc20000c2d000-0xffffc20000c31000 16384 tcp_init+0xd5/0x31c pages\u003d3 vmalloc\n0xffffc20000c31000-0xffffc20000c34000 12288 alloc_large_system_hash+0x127/0x246 pages\u003d2 vmalloc\n0xffffc20000c34000-0xffffc20000c36000 8192 init_vdso_vars+0xde/0x1f1\n0xffffc20000c36000-0xffffc20000c38000 8192 pci_iomap+0x8a/0xb4 phys\u003dd8e00000 ioremap\n0xffffc20000c38000-0xffffc20000c3a000 8192 usb_hcd_pci_probe+0x139/0x295 [usbcore] phys\u003dd8e00000 ioremap\n0xffffc20000c3a000-0xffffc20000c3e000 16384 sys_swapon+0x509/0xa15 pages\u003d3 vmalloc\n0xffffc20000c40000-0xffffc20000c61000 135168 e1000_probe+0x1c4/0xa32 phys\u003dd8a20000 ioremap\n0xffffc20000c61000-0xffffc20000c6a000 36864 _xfs_buf_map_pages+0x8e/0xc0 vmap\n0xffffc20000c6a000-0xffffc20000c73000 36864 _xfs_buf_map_pages+0x8e/0xc0 vmap\n0xffffc20000c73000-0xffffc20000c7c000 36864 _xfs_buf_map_pages+0x8e/0xc0 vmap\n0xffffc20000c7c000-0xffffc20000c7f000 12288 e1000e_setup_tx_resources+0x29/0xbe pages\u003d2 vmalloc\n0xffffc20000c80000-0xffffc20001481000 8392704 pci_mmcfg_arch_init+0x90/0x118 phys\u003de0000000 ioremap\n0xffffc20001481000-0xffffc20001682000 2101248 alloc_large_system_hash+0x127/0x246 pages\u003d512 vmalloc\n0xffffc20001682000-0xffffc20001e83000 8392704 alloc_large_system_hash+0x127/0x246 pages\u003d2048 vmalloc vpages\n0xffffc20001e83000-0xffffc20002204000 3674112 alloc_large_system_hash+0x127/0x246 pages\u003d896 vmalloc vpages\n0xffffc20002204000-0xffffc2000220d000 36864 _xfs_buf_map_pages+0x8e/0xc0 vmap\n0xffffc2000220d000-0xffffc20002216000 36864 _xfs_buf_map_pages+0x8e/0xc0 vmap\n0xffffc20002216000-0xffffc2000221f000 36864 _xfs_buf_map_pages+0x8e/0xc0 vmap\n0xffffc2000221f000-0xffffc20002228000 36864 _xfs_buf_map_pages+0x8e/0xc0 vmap\n0xffffc20002228000-0xffffc20002231000 36864 _xfs_buf_map_pages+0x8e/0xc0 vmap\n0xffffc20002231000-0xffffc20002234000 12288 e1000e_setup_rx_resources+0x35/0x122 pages\u003d2 vmalloc\n0xffffc20002240000-0xffffc20002261000 135168 e1000_probe+0x1c4/0xa32 phys\u003dd8a60000 ioremap\n0xffffc20002261000-0xffffc2000270c000 4894720 sys_swapon+0x509/0xa15 pages\u003d1194 vmalloc vpages\n0xffffffffa0000000-0xffffffffa0022000 139264 module_alloc+0x4f/0x55 pages\u003d33 vmalloc\n0xffffffffa0022000-0xffffffffa0029000 28672 module_alloc+0x4f/0x55 pages\u003d6 vmalloc\n0xffffffffa002b000-0xffffffffa0034000 36864 module_alloc+0x4f/0x55 pages\u003d8 vmalloc\n0xffffffffa0034000-0xffffffffa003d000 36864 module_alloc+0x4f/0x55 pages\u003d8 vmalloc\n0xffffffffa003d000-0xffffffffa0049000 49152 module_alloc+0x4f/0x55 pages\u003d11 vmalloc\n0xffffffffa0049000-0xffffffffa0050000 28672 module_alloc+0x4f/0x55 pages\u003d6 vmalloc\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a10aa579878fc6f9cd17455067380bbdf1d53c91", "tree": "c42fbb1e9422e5334c2207cafed4a2b5b1ad16c4", "parents": [ "b45445684198a946b587732265692e6495993abf" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Mon Apr 28 02:12:40 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:21 2008 -0700" }, "message": "vmalloc: show vmalloced areas via /proc/vmallocinfo\n\nImplement a new proc file that allows the display of the currently allocated\nvmalloc memory.\n\nIt allows to see the users of vmalloc. That is important if vmalloc space is\nscarce (i386 for example).\n\nAnd it\u0027s going to be important for the compound page fallback to vmalloc.\nMany of the current users can be switched to use compound pages with fallback.\n This means that the number of users of vmalloc is reduced and page tables no\nlonger necessary to access the memory. /proc/vmallocinfo allows to review how\nthat reduction occurs.\n\nIf memory becomes fragmented and larger order allocations are no longer\npossible then /proc/vmallocinfo allows to see which compound page allocations\nfell back to virtual compound pages. That is important for new users of\nvirtual compound pages. Such as order 1 stack allocation etc that may\nfallback to virtual compound pages in the future.\n\n/proc/vmallocinfo permissions are made readable-only-by-root to avoid possible\ninformation leakage.\n\n[akpm@linux-foundation.org: coding-style fixes]\n[akpm@linux-foundation.org: CONFIG_MMU\u003dn build fix]\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Arjan van de Ven \u003carjan@infradead.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ac6aadb24b7d4f0e54246732e221c102073412bf", "tree": "1936c3e847fca977b8c0d650416c66655f7633ad", "parents": [ "f05111f50105ac479a008cf85749cf9c956453ea" ], "author": { "name": "Miklos Szeredi", "email": "mszeredi@suse.cz", "time": "Mon Apr 28 02:12:38 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:20 2008 -0700" }, "message": "mm: rotate_reclaimable_page() cleanup\n\nClean up messy conditional calling of test_clear_page_writeback() from both\nrotate_reclaimable_page() and end_page_writeback().\n\nThe only user of rotate_reclaimable_page() is end_page_writeback() so this is\nOK.\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f05111f50105ac479a008cf85749cf9c956453ea", "tree": "59126a7962c08f77c1e4a9de68998f479b5e8e11", "parents": [ "7edf85aa3c00df1e86e82f649c41efa0dd8a7218" ], "author": { "name": "S.Caglar Onur", "email": "caglar@pardus.org.tr", "time": "Mon Apr 28 02:12:38 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:20 2008 -0700" }, "message": "mm/page_alloc.c: fix indentation\n\nzlc_setup(): handle jiffies wraparound\n(10ed273f5016c582413dfbc468dd084957d847e1) changes tab with spaces\n\nSigned-off-by: S.Caglar Onur \u003ccaglar@pardus.org.tr\u003e\nCc: Lee Schermerhorn \u003cLee.Schermerhorn@hp.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b5ee5befa75e33e55d34584ad10286c5005cb1de", "tree": "cc8953411811c75eeffe53dc387fad66dec92144", "parents": [ "a43361cf3cb6fb6431fdbfb0f3ef26a334826160" ], "author": { "name": "Andi Kleen", "email": "ak@suse.de", "time": "Mon Apr 28 02:12:37 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:20 2008 -0700" }, "message": "dmapool: enable debugging for CONFIG_SLUB_DEBUG_ON too\n\nPreviously it was only enabled for CONFIG_DEBUG_SLAB.\n\nNot hooked into the slub runtime debug configuration, so you currently only\nget it with CONFIG_SLUB_DEBUG_ON, not plain CONFIG_SLUB_DEBUG\n\nAcked-by: Matthew Wilcox \u003cwilly@linux.intel.com\u003e\nSigned-off-by: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a43361cf3cb6fb6431fdbfb0f3ef26a334826160", "tree": "8ec343f73bb61c1ef08a32c78e912a7506c932bf", "parents": [ "3e1f064562fcff7bf3856bc1d00dfa84d4f121cc" ], "author": { "name": "Lee Schermerhorn", "email": "Lee.Schermerhorn@hp.com", "time": "Mon Apr 28 02:12:36 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:20 2008 -0700" }, "message": "mempolicy: fix parsing of tmpfs mpol mount option\n\nParsing of new mode flags in the tmpfs mpol mount option is slightly broken:\n\nSetting a valid flag works OK:\n\t#mount -o remount,mpol\u003dbind\u003dstatic:1-2 /dev/shm\n\t#mount\n\t...\n\ttmpfs on /dev/shm type tmpfs (rw,mpol\u003dbind\u003dstatic:1-2)\n\t...\n\nHowever, we can\u0027t remove them or change them, once we\u0027ve\nset a valid flag:\n\n\t#mount -o remount,mpol\u003dbind:1-2 /dev/shm\n\t#mount\n\t...\n\ttmpfs on /dev/shm type tmpfs (rw,mpol\u003dbind:1-2)\n\t...\n\nIt SAYS it removed it, but that\u0027s just a copy of the input\nstring. If we now try to set it to a different flag, we\nget:\n\n\t#mount -o remount,mpol\u003dbind\u003drelative:1-2 /dev/shm\n\tmount: /dev/shm not mounted already, or bad option\n\nAnd on the console, we see:\n\ttmpfs: Bad value \u0027bind\u0027 for mount option \u0027mpol\u0027\n\t ^ lost remainder of string\n\nFurthermore, bogus flags are accepted with out error.\nGranted, they are a no-op:\n\n\t#mount -o remount,mpol\u003dinterleave\u003dfoo:0-3 /dev/shm\n\t#mount\n\t...\n\ttmpfs on /dev/shm type tmpfs (rw,mpol\u003dinterleave\u003dfoo:0-3)\n\nAgain, that\u0027s just a copy of the input string shown by the mount command.\n\nThis patch fixes the behavior by pre-zeroing the flags so that only one of the\nmutually exclusive flags can be set at one time. It also reports an error\nwhen an unrecognized flag is specified.\n\nThe check for both flags being set is removed because it can\u0027t happen with\nthis implementation. If we ever want to support multiple non-exclusive flags,\nthis area will need rework and we will need to check that any mutually\nexclusive flags aren\u0027t specified.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nCc: Eric Whitney \u003ceric.whitney@hp.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3e1f064562fcff7bf3856bc1d00dfa84d4f121cc", "tree": "9ebc17449238ab5284b72f634405044376dc816b", "parents": [ "3842b46de626d1a3c44ad280d67ab0a4dc047d13" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Apr 28 02:12:34 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:20 2008 -0700" }, "message": "mempolicy: disallow static or relative flags for local preferred mode\n\nMPOL_F_STATIC_NODES and MPOL_F_RELATIVE_NODES don\u0027t mean anything for\nMPOL_PREFERRED policies that were created with an empty nodemask (for purely\nlocal allocations). They\u0027ll never be invalidated because the allowed mems of\na task changes or need to be rebound relative to a cpuset\u0027s placement.\n\nAlso fixes a bug identified by Lee Schermerhorn that disallowed empty\nnodemasks to be passed to MPOL_PREFERRED to specify local allocations. [A\ndifferent, somewhat incomplete, patch already existed in 25-rc5-mm1.]\n\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Lee Schermerhorn \u003cLee.Schermerhorn@hp.com\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nCc: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "37012946da940521fb997a758a219d2f1ab56e51", "tree": "16553f91325720a53d0314070793700b5926e052", "parents": [ "1d0d2680a01c4f9e292ec6d4714884da939053a1" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Apr 28 02:12:33 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 28 08:58:20 2008 -0700" }, "message": "mempolicy: create mempolicy_operations structure\n\nCreate a mempolicy_operations structure that currently points to two\nfunctions[*] for the various modes:\n\n\tint (*create)(struct mempolicy *, const nodemask_t *);\n\tvoid (*rebind)(struct mempolicy *, const nodemask_t *);\n\nThis splits the implementation for the various modes out of two large\nfunctions, mpol_new() and mpol_rebind_policy(). Eventually it may be\nbeneficial to add additional functions to accomodate the existing switch()\nstatements in mm/mempolicy.c.\n\n [*] The -\u003ecreate() function for MPOL_DEFAULT is currently NULL since no\n struct mempolicy is dynamically allocated.\n\n[Lee.Schermerhorn@hp.com: fix regression in the package mempolicy regression tests]\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Eric Whitney \u003ceric.whitney@hp.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" } ], "next": "1d0d2680a01c4f9e292ec6d4714884da939053a1" }