)]}' { "log": [ { "commit": "a7016235a61d520e6806f38129001d935c4b6661", "tree": "cfd42cc6f0c825c8d9033e91d6d971ea549520e3", "parents": [ "67f15b06c1a7e5417b7042b515ca2695de30beda" ], "author": { "name": "Hugh Dickins", "email": "hugh.dickins@tiscali.co.uk", "time": "Fri Jan 29 17:46:34 2010 +0000" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jan 29 10:28:09 2010 -0800" }, "message": "mm: fix migratetype bug which slowed swapping\n\nAfter memory pressure has forced it to dip into the reserves, 2.6.32\u0027s\n5f8dcc21211a3d4e3a7a5ca366b469fb88117f61 \"page-allocator: split per-cpu\nlist into one-list-per-migrate-type\" has been returning MIGRATE_RESERVE\npages to the MIGRATE_MOVABLE free_list: in some sense depleting reserves.\n\nFix that in the most straightforward way (which, considering the overheads\nof alternative approaches, is Mel\u0027s preference): the right migratetype is\nalready in page_private(page), but free_pcppages_bulk() wasn\u0027t using it.\n\nHow did this bug show up? As a 20% slowdown in my tmpfs loop kbuild\nswapping tests, on PowerMac G5 with SLUB allocator. Bisecting to that\ncommit was easy, but explaining the magnitude of the slowdown not easy.\n\nThe same effect appears, but much less markedly, with SLAB, and even\nless markedly on other machines (the PowerMac divides into fewer zones\nthan x86, I think that may be a factor). We guess that lumpy reclaim\nof short-lived high-order pages is implicated in some way, and probably\nthis bug has been tickling a poor decision somewhere in page reclaim.\n\nBut instrumentation hasn\u0027t told me much, I\u0027ve run out of time and\nimagination to determine exactly what\u0027s going on, and shouldn\u0027t hold up\nthe fix any longer: it\u0027s valid, and might even fix other misbehaviours.\n\nSigned-off-by: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: stable@kernel.org\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6ccf80eb15ccaca4d3f1ab5162b9ded5eecd9971", "tree": "23dad05636e88a743755bfd3e7a5dad4ef5e49e0", "parents": [ "1f0b8b95543118f97197a978560438c1ce88cd00" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Fri Jan 15 17:01:18 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Jan 16 16:53:55 2010 -0800" }, "message": "page allocator: update NR_FREE_PAGES only when necessary\n\ncommit f2260e6b (page allocator: update NR_FREE_PAGES only as necessary)\nmade one minor regression. if __rmqueue() was failed, NR_FREE_PAGES stat\ngo wrong. this patch fixes it.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nReported-by: Huang Shijie \u003cshijie8@gmail.com\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.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": "d2dbe08ddceb4ba2b274abb84326d7e69d454e5c", "tree": "7b363c03dc6441b3fe6ebdcacd892cbd09b04f29", "parents": [ "5dab600e6a153ceb64832f608069e6c08185411a" ], "author": { "name": "Kazuhisa Ichikawa", "email": "ki@epsilou.com", "time": "Fri Jan 15 17:01:20 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Jan 16 12:15:38 2010 -0800" }, "message": "mm/page_alloc: fix the range check for backward merging\n\nThe current check for \u0027backward merging\u0027 within add_active_range() does\nnot seem correct. start_pfn must be compared against\nearly_node_map[i].start_pfn (and NOT against .end_pfn) to find out whether\nthe new region is backward-mergeable with the existing range.\n\nSigned-off-by: Kazuhisa Ichikawa \u003cki@epsilou.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "443c6f145de813518c36ac6b6e4e08d9445337e7", "tree": "d0d635c07185b06ddcd2a82f6b2c90c188366431", "parents": [ "4440095c8268c1a5e11577097d2be429cec036ca" ], "author": { "name": "Andi Kleen", "email": "ak@linux.intel.com", "time": "Wed Dec 23 21:00:47 2009 +0100" }, "committer": { "name": "Andi Kleen", "email": "ak@linux.intel.com", "time": "Wed Dec 23 21:01:16 2009 +0100" }, "message": "SYSCTL: Add a mutex to the page_alloc zone order sysctl\n\nThe zone list code clearly cannot tolerate concurrent writers (I couldn\u0027t\nfind any locks for that), so simply add a global mutex. No need for RCU\nin this case.\n\nSigned-off-by: Andi Kleen \u003cak@linux.intel.com\u003e\n" }, { "commit": "dd508ae2dbff0cfc7401eb6e278339fc56bc5033", "tree": "daa9f88a4e2e65e86b351ffa2d52dcc07e753c1e", "parents": [ "7801edb0b8b66e83c13623b483bc2e846c007c9d", "95cd34b42b43c0ed5a89a764e023189bfe7b1530" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Dec 22 14:18:13 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Dec 22 14:18:13 2009 -0800" }, "message": "Merge branch \u0027merge\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc\n\n* \u0027merge\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (36 commits)\n powerpc/gc/wii: Remove get_irq_desc()\n powerpc/gc/wii: hlwd-pic: convert irq_desc.lock to raw_spinlock\n powerpc/gamecube/wii: Fix off-by-one error in ugecon/usbgecko_udbg\n powerpc/mpic: Fix problem that affinity is not updated\n powerpc/mm: Fix stupid bug in subpge protection handling\n powerpc/iseries: use DECLARE_COMPLETION_ONSTACK for non-constant completion\n powerpc: Fix MSI support on U4 bridge PCIe slot\n powerpc: Handle VSX alignment faults correctly in little-endian mode\n powerpc/mm: Fix typo of cpumask_clear_cpu()\n powerpc/mm: Fix hash_utils_64.c compile errors with DEBUG enabled.\n powerpc: Convert BUG() to use unreachable()\n powerpc/pseries: Make declarations of cpu_hotplug_driver_lock() ANSI compatible.\n powerpc/pseries: Don\u0027t panic when H_PROD fails during cpu-online.\n powerpc/mm: Fix a WARN_ON() with CONFIG_DEBUG_PAGEALLOC and CONFIG_DEBUG_VM\n powerpc/defconfigs: Set HZ\u003d100 on pseries and ppc64 defconfigs\n powerpc/defconfigs: Disable token ring in powerpc defconfigs\n powerpc/defconfigs: Reduce 64bit vmlinux by making acenic and cramfs modules\n powerpc/pseries: Select XICS and PCI_MSI PSERIES\n powerpc/85xx: Wrong variable returned on error\n powerpc/iseries: Convert to proc_fops\n ...\n" }, { "commit": "3981e152864fcc1dbbb564e1f4c0ae11a09639d2", "tree": "76c767a9b25e294c3cc8edd9870304b845cabdd9", "parents": [ "aac3d39693529ca538e37ebdb6ed5d6432a697c7", "18374d89e5fe96772102f44f535efb1198d9be08" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Dec 19 09:48:14 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Dec 19 09:48:14 2009 -0800" }, "message": "Merge branch \u0027x86-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027x86-fixes-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:\n x86, irq: Allow 0xff for /proc/irq/[n]/smp_affinity on an 8-cpu system\n Makefile: Unexport LC_ALL instead of clearing it\n x86: Fix objdump version check in arch/x86/tools/chkobjdump.awk\n x86: Reenable TSC sync check at boot, even with NONSTOP_TSC\n x86: Don\u0027t use POSIX character classes in gen-insn-attr-x86.awk\n Makefile: set LC_CTYPE, LC_COLLATE, LC_NUMERIC to C\n x86: Increase MAX_EARLY_RES; insufficient on 32-bit NUMA\n x86: Fix checking of SRAT when node 0 ram is not from 0\n x86, cpuid: Add \"volatile\" to asm in native_cpuid()\n x86, msr: msrs_alloc/free for CONFIG_SMP\u003dn\n x86, amd: Get multi-node CPU info from NodeId MSR instead of PCI config space\n x86: Add IA32_TSC_AUX MSR and use it\n x86, msr/cpuid: Register enough minors for the MSR and CPUID drivers\n initramfs: add missing decompressor error check\n bzip2: Add missing checks for malloc returning NULL\n bzip2/lzma/gzip: pre-boot malloc doesn\u0027t return NULL on failure\n" }, { "commit": "925cc71e512a29e2594bcc17dc58d0a0e9c4d524", "tree": "7240ccf6ba713cc180d388a28f00c1a43293bc14", "parents": [ "55639353a0035052d9ea6cfe4dde0ac7fcbb2c9f" ], "author": { "name": "Robert Jennings", "email": "rcj@linux.vnet.ibm.com", "time": "Thu Dec 17 14:44:38 2009 +0000" }, "committer": { "name": "Benjamin Herrenschmidt", "email": "benh@kernel.crashing.org", "time": "Fri Dec 18 14:53:36 2009 +1100" }, "message": "mm: Add notifier in pageblock isolation for balloon drivers\n\nMemory balloon drivers can allocate a large amount of memory which is not\nmovable but could be freed to accomodate memory hotplug remove.\n\nPrior to calling the memory hotplug notifier chain the memory in the\npageblock is isolated. Currently, if the migrate type is not\nMIGRATE_MOVABLE the isolation will not proceed, causing the memory removal\nfor that page range to fail.\n\nRather than failing pageblock isolation if the migrateteype is not\nMIGRATE_MOVABLE, this patch checks if all of the pages in the pageblock,\nand not on the LRU, are owned by a registered balloon driver (or other\nentity) using a notifier chain. If all of the non-movable pages are owned\nby a balloon, they can be freed later through the memory notifier chain\nand the range can still be isolated in set_migratetype_isolate().\n\nSigned-off-by: Robert Jennings \u003crcj@linux.vnet.ibm.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Brian King \u003cbrking@linux.vnet.ibm.com\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: Gerald Schaefer \u003cgeralds@linux.vnet.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\n" }, { "commit": "329962503692b42d8088f31584e42d52db179d52", "tree": "fe8aa709fcbf6154e25c291ec569885a23e2eba1", "parents": [ "45a94d7cd45ed991914011919e7d40eb6d2546d1" ], "author": { "name": "Yinghai Lu", "email": "yinghai@kernel.org", "time": "Tue Dec 15 17:59:02 2009 -0800" }, "committer": { "name": "H. Peter Anvin", "email": "hpa@zytor.com", "time": "Wed Dec 16 16:43:37 2009 -0800" }, "message": "x86: Fix checking of SRAT when node 0 ram is not from 0\n\nFound one system that boot from socket1 instead of socket0, SRAT get rejected...\n\n[ 0.000000] SRAT: Node 1 PXM 0 0-a0000\n[ 0.000000] SRAT: Node 1 PXM 0 100000-80000000\n[ 0.000000] SRAT: Node 1 PXM 0 100000000-2080000000\n[ 0.000000] SRAT: Node 0 PXM 1 2080000000-4080000000\n[ 0.000000] SRAT: Node 2 PXM 2 4080000000-6080000000\n[ 0.000000] SRAT: Node 3 PXM 3 6080000000-8080000000\n[ 0.000000] SRAT: Node 4 PXM 4 8080000000-a080000000\n[ 0.000000] SRAT: Node 5 PXM 5 a080000000-c080000000\n[ 0.000000] SRAT: Node 6 PXM 6 c080000000-e080000000\n[ 0.000000] SRAT: Node 7 PXM 7 e080000000-10080000000\n...\n[ 0.000000] NUMA: Allocated memnodemap from 500000 - 701040\n[ 0.000000] NUMA: Using 20 for the hash shift.\n[ 0.000000] Adding active range (0, 0x2080000, 0x4080000) 0 entries of 3200 used\n[ 0.000000] Adding active range (1, 0x0, 0x96) 1 entries of 3200 used\n[ 0.000000] Adding active range (1, 0x100, 0x7f750) 2 entries of 3200 used\n[ 0.000000] Adding active range (1, 0x100000, 0x2080000) 3 entries of 3200 used\n[ 0.000000] Adding active range (2, 0x4080000, 0x6080000) 4 entries of 3200 used\n[ 0.000000] Adding active range (3, 0x6080000, 0x8080000) 5 entries of 3200 used\n[ 0.000000] Adding active range (4, 0x8080000, 0xa080000) 6 entries of 3200 used\n[ 0.000000] Adding active range (5, 0xa080000, 0xc080000) 7 entries of 3200 used\n[ 0.000000] Adding active range (6, 0xc080000, 0xe080000) 8 entries of 3200 used\n[ 0.000000] Adding active range (7, 0xe080000, 0x10080000) 9 entries of 3200 used\n[ 0.000000] SRAT: PXMs only cover 917504MB of your 1048566MB e820 RAM. Not used.\n[ 0.000000] SRAT: SRAT not used.\n\nthe early_node_map is not sorted because node0 with non zero start come first.\n\nso try to sort it right away after all regions are registered.\n\nalso fixs refression by 8716273c (x86: Export srat physical topology)\n\n-v2: make it more solid to handle cross node case like node0 [0,4g), [8,12g) and node1 [4g, 8g), [12g, 16g)\n-v3: update comments.\n\nReported-and-tested-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\nSigned-off-by: Yinghai Lu \u003cyinghai@kernel.org\u003e\nLKML-Reference: \u003c4B2579D2.3010201@kernel.org\u003e\nSigned-off-by: H. Peter Anvin \u003chpa@zytor.com\u003e\n" }, { "commit": "d4220f987cf473c65a342ca69e3eb13dea919a49", "tree": "dbb004a9c805d6de3f6e3955398fee1084a29f16", "parents": [ "61cf693159d6a968a7014e24905143f71ed8ddcf", "f2c03debdfb387fa2e35cac6382779072b8b9209" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Dec 16 12:36:49 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Dec 16 12:36:49 2009 -0800" }, "message": "Merge branch \u0027hwpoison\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6\n\n* \u0027hwpoison\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6: (34 commits)\n HWPOISON: Remove stray phrase in a comment\n HWPOISON: Try to allocate migration page on the same node\n HWPOISON: Don\u0027t do early filtering if filter is disabled\n HWPOISON: Add a madvise() injector for soft page offlining\n HWPOISON: Add soft page offline support\n HWPOISON: Undefine short-hand macros after use to avoid namespace conflict\n HWPOISON: Use new shake_page in memory_failure\n HWPOISON: Use correct name for MADV_HWPOISON in documentation\n HWPOISON: mention HWPoison in Kconfig entry\n HWPOISON: Use get_user_page_fast in hwpoison madvise\n HWPOISON: add an interface to switch off/on all the page filters\n HWPOISON: add memory cgroup filter\n memcg: add accessor to mem_cgroup.css\n memcg: rename and export try_get_mem_cgroup_from_page()\n HWPOISON: add page flags filter\n mm: export stable page flags\n HWPOISON: limit hwpoison injector to known page types\n HWPOISON: add fs/device filters\n HWPOISON: return 0 to indicate success reliably\n HWPOISON: make semantics of IGNORED/DELAYED clear\n ...\n" }, { "commit": "4365a5676fa3aa1d5ae6c90c22a0044f09ba584e", "tree": "5b9914ccbdcf2aa695473421e71f6299fbe78cef", "parents": [ "3b4798cbc13dd8d1150aa6377f97f0e11450a67d" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hioryu@jp.fujitsu.com", "time": "Tue Dec 15 16:45:33 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Dec 16 07:19:57 2009 -0800" }, "message": "oom-kill: fix NUMA constraint check with nodemask\n\nFix node-oriented allocation handling in oom-kill.c I myself think of this\nas a bugfix not as an ehnancement.\n\nIn these days, things are changed as\n - alloc_pages() eats nodemask as its arguments, __alloc_pages_nodemask().\n - mempolicy don\u0027t maintain its own private zonelists.\n (And cpuset doesn\u0027t use nodemask for __alloc_pages_nodemask())\n\nSo, current oom-killer\u0027s check function is wrong.\n\nThis patch does\n - check nodemask, if nodemask \u0026\u0026 nodemask doesn\u0027t cover all\n node_states[N_HIGH_MEMORY], this is CONSTRAINT_MEMORY_POLICY.\n - Scan all zonelist under nodemask, if it hits cpuset\u0027s wall\n this faiulre is from cpuset.\nAnd\n - modifies the caller of out_of_memory not to call oom if __GFP_THISNODE.\n This doesn\u0027t change \"current\" behavior. If callers use __GFP_THISNODE\n it should handle \"page allocation failure\" by itself.\n\n - handle __GFP_NOFAIL+__GFP_THISNODE path.\n This is something like a FIXME but this gfpmask is not used now.\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hioryu@jp.fujitsu.com\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8d22ba1b74aa9420b6032d856446564fb21f8090", "tree": "6c2e2d27e81d784faa0481500f1cecc613ff1167", "parents": [ "95d01fc664b9476e0d18e3d745bb209a42a33588" ], "author": { "name": "Wu Fengguang", "email": "fengguang.wu@intel.com", "time": "Wed Dec 16 12:19:58 2009 +0100" }, "committer": { "name": "Andi Kleen", "email": "ak@linux.intel.com", "time": "Wed Dec 16 12:19:58 2009 +0100" }, "message": "HWPOISON: detect free buddy pages explicitly\n\nMost free pages in the buddy system have no PG_buddy set.\nIntroduce is_free_buddy_page() for detecting them reliably.\n\nCC: Nick Piggin \u003cnpiggin@suse.de\u003e\nCC: Mel Gorman \u003cmel@linux.vnet.ibm.com\u003e\nSigned-off-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nSigned-off-by: Andi Kleen \u003cak@linux.intel.com\u003e\n" }, { "commit": "af8e3354b4bbd1ee5a3a55d11a5e1fe37e77f0ba", "tree": "8dc0ece80878d00409d4662c5fd1e28cd7fbbdd8", "parents": [ "53f79acb6ecb648afd63e0f13deba167f1a934df" ], "author": { "name": "Hugh Dickins", "email": "hugh.dickins@tiscali.co.uk", "time": "Mon Dec 14 17:58:59 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Dec 15 08:53:17 2009 -0800" }, "message": "mm: CONFIG_MMU for PG_mlocked\n\nRemove three degrees of obfuscation, left over from when we had\nCONFIG_UNEVICTABLE_LRU. MLOCK_PAGES is CONFIG_HAVE_MLOCKED_PAGE_BIT is\nCONFIG_HAVE_MLOCK is CONFIG_MMU. rmap.o (and memory-failure.o) are only\nbuilt when CONFIG_MMU, so don\u0027t need such conditions at all.\n\nSomehow, I feel no compulsion to remove the CONFIG_HAVE_MLOCK* lines from\n169 defconfigs: leave those to evolve in due course.\n\nSigned-off-by: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\u003e\nCc: Izik Eidus \u003cieidus@redhat.com\u003e\nCc: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Lee Schermerhorn \u003cLee.Schermerhorn@hp.com\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nCc: Minchan Kim \u003cminchan.kim@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": "9d0ed60fe9cd1fbf57f755cd27a23ae9114d7210", "tree": "71ecabae46aa132545ca39dd0da62c483d69c20b", "parents": [ "cc4a6851466039a8a688c843962a05689059ff3b" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Wed Nov 11 14:26:17 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Nov 12 07:25:56 2009 -0800" }, "message": "page allocator: Do not allow interrupts to use ALLOC_HARDER\n\nCommit 341ce06f69abfafa31b9468410a13dbd60e2b237 (\"page allocator:\ncalculate the alloc_flags for allocation only once\") altered watermark\nlogic slightly by allowing rt_tasks that are handling an interrupt to set\nALLOC_HARDER. This patch brings the watermark logic more in line with\n2.6.30.\n\nThis change results in a reduction of the number high-order GFP_ATOMIC\nallocation failures reported. See\nhttp://www.gossamer-threads.com/lists/linux/kernel/1144153\n\n[rientjes@google.com: Spotted the problem]\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: David Rientjes \u003crientjes@google.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": "cc4a6851466039a8a688c843962a05689059ff3b", "tree": "23e3f6c4797179d6bea91890f5784c1c0cb47aa9", "parents": [ "b0c9065324b7c1242b97b27a1407da18471b9b23" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Wed Nov 11 14:26:14 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Nov 12 07:25:56 2009 -0800" }, "message": "page allocator: always wake kswapd when restarting an allocation attempt after direct reclaim failed\n\nIf a direct reclaim makes no forward progress, it considers whether it\nshould go OOM or not. Whether OOM is triggered or not, it may retry the\nallocation afterwards. In times past, this would always wake kswapd as\nwell but currently, kswapd is not woken up after direct reclaim fails.\nFor order-0 allocations, this makes little difference but if there is a\nheavy mix of higher-order allocations that direct reclaim is failing for,\nit might mean that kswapd is not rewoken for higher orders as much as it\ndid previously.\n\nThis patch wakes up kswapd when an allocation is being retried after a\ndirect reclaim failure. It would be expected that kswapd is already\nawake, but this has the effect of telling kswapd to reclaim at the higher\norder as well.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nReviewed-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@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": "b76146ed1ae7d7acae1d51f9342e31d00c8d5a12", "tree": "ea8d8923070cb8fdf6eeb50ee9e21fd085b2ac73", "parents": [ "5c36fe3d87b3f0c85894a49193c66096a3d6b26f" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Mon Oct 26 16:49:52 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 29 07:39:27 2009 -0700" }, "message": "revert \"mm: oom analysis: add buffer cache information to show_free_areas()\"\n\nRevert\n\n commit 71de1ccbe1fb40203edd3beb473f8580d917d2ca\n Author: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\n AuthorDate: Mon Sep 21 17:01:31 2009 -0700\n Commit: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n CommitDate: Tue Sep 22 07:17:27 2009 -0700\n\n mm: oom analysis: add buffer cache information to show_free_areas()\n\nshow_free_areas() is called during page allocation failures, and page\nallocation failures can occur in any calling context.\n\nBut nr_blockdev_pages() takes VFS locks which should not be taken from\nhard IRQ context (at least). The result is lockdep warnings (and\ndeadlockability) during page allocation failures.\n\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Alexey Dobriyan \u003cadobriyan@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": "db16826367fefcb0ddb93d76b66adc52eb4e6339", "tree": "626224c1eb1eb79c522714591f208b4fdbdcd9d4", "parents": [ "cd6045138ed1bb5d8773e940d51c34318eef3ef2", "465fdd97cbe16ef8727221857e96ef62dd352017" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:53:22 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:53:22 2009 -0700" }, "message": "Merge branch \u0027hwpoison\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6\n\n* \u0027hwpoison\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6: (21 commits)\n HWPOISON: Enable error_remove_page on btrfs\n HWPOISON: Add simple debugfs interface to inject hwpoison on arbitary PFNs\n HWPOISON: Add madvise() based injector for hardware poisoned pages v4\n HWPOISON: Enable error_remove_page for NFS\n HWPOISON: Enable .remove_error_page for migration aware file systems\n HWPOISON: The high level memory error handler in the VM v7\n HWPOISON: Add PR_MCE_KILL prctl to control early kill behaviour per process\n HWPOISON: shmem: call set_page_dirty() with locked page\n HWPOISON: Define a new error_remove_page address space op for async truncation\n HWPOISON: Add invalidate_inode_page\n HWPOISON: Refactor truncate to allow direct truncating of page v2\n HWPOISON: check and isolate corrupted free pages v2\n HWPOISON: Handle hardware poisoned pages in try_to_unmap\n HWPOISON: Use bitmask/action code for try_to_unmap behaviour\n HWPOISON: x86: Add VM_FAULT_HWPOISON handling to x86 page fault handler v2\n HWPOISON: Add poison check to page fault handling\n HWPOISON: Add basic support for poisoned pages in fault handler v3\n HWPOISON: Add new SIGBUS error codes for hardware poison signals\n HWPOISON: Add support for poison swap entries v2\n HWPOISON: Export some rmap vma locking to outside world\n ...\n" }, { "commit": "8d65af789f3e2cf4cfbdbf71a0f7a61ebcd41d38", "tree": "121df3bfffc7853ac6d2c514ad514d4a748a0933", "parents": [ "c0d0787b6d47d9f4d5e8bd321921104e854a9135" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Wed Sep 23 15:57:19 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Sep 24 07:21:04 2009 -0700" }, "message": "sysctl: remove \"struct file *\" argument of -\u003eproc_handler\n\nIt\u0027s unused.\n\nIt isn\u0027t needed -- read or write flag is already passed and sysctl\nshouldn\u0027t care about the rest.\n\nIt _was_ used in two places at arch/frv for some reason.\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nCc: David Howells \u003cdhowells@redhat.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Ralf Baechle \u003cralf@linux-mips.org\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "03f6462a3ae78f36eb1f0ee8b4d5ae2f7859c1d5", "tree": "bf19c5019705796e90ef592233aca5f09025a92f", "parents": [ "62eede62dafb4a6633eae7ffbeb34c60dba5e7b1" ], "author": { "name": "Hugh Dickins", "email": "hugh.dickins@tiscali.co.uk", "time": "Mon Sep 21 17:03:35 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:41 2009 -0700" }, "message": "mm: move highest_memmap_pfn\n\nMove highest_memmap_pfn __read_mostly from page_alloc.c next to zero_pfn\n__read_mostly in memory.c: to help them share a cacheline, since they\u0027re\nvery often tested together in vm_normal_page().\n\nSigned-off-by: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Minchan Kim \u003cminchan.kim@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": "a6f9edd65beaef24836e8934c8912c1e974dd45c", "tree": "041c60ed559d3bc1f289d0040e75cfdd78f0acd0", "parents": [ "5f8dcc21211a3d4e3a7a5ca366b469fb88117f61" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Mon Sep 21 17:03:20 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:39 2009 -0700" }, "message": "page-allocator: maintain rolling count of pages to free from the PCP\n\nWhen round-robin freeing pages from the PCP lists, empty lists may be\nencountered. In the event one of the lists has more pages than another,\nthere may be numerous checks for list_empty() which is undesirable. This\npatch maintains a count of pages to free which is incremented when empty\nlists are encountered. The intention is that more pages will then be\nfreed from fuller lists than the empty ones reducing the number of empty\nlist checks in the free path.\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.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": "5f8dcc21211a3d4e3a7a5ca366b469fb88117f61", "tree": "4bbb1b55c7787462fe313c7c003e77823c032422", "parents": [ "5d863b89688e5811cd9e5bd0082cb38abe03adf3" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Mon Sep 21 17:03:19 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:39 2009 -0700" }, "message": "page-allocator: split per-cpu list into one-list-per-migrate-type\n\nThe following two patches remove searching in the page allocator fast-path\nby maintaining multiple free-lists in the per-cpu structure. At the time\nthe search was introduced, increasing the per-cpu structures would waste a\nlot of memory as per-cpu structures were statically allocated at\ncompile-time. This is no longer the case.\n\nThe patches are as follows. They are based on mmotm-2009-08-27.\n\nPatch 1 adds multiple lists to struct per_cpu_pages, one per\n\tmigratetype that can be stored on the PCP lists.\n\nPatch 2 notes that the pcpu drain path check empty lists multiple times. The\n\tpatch reduces the number of checks by maintaining a count of free\n\tlists encountered. Lists containing pages will then free multiple\n\tpages in batch\n\nThe patches were tested with kernbench, netperf udp/tcp, hackbench and\nsysbench. The netperf tests were not bound to any CPU in particular and\nwere run such that the results should be 99% confidence that the reported\nresults are within 1% of the estimated mean. sysbench was run with a\npostgres background and read-only tests. Similar to netperf, it was run\nmultiple times so that it\u0027s 99% confidence results are within 1%. The\npatches were tested on x86, x86-64 and ppc64 as\n\nx86:\tIntel Pentium D 3GHz with 8G RAM (no-brand machine)\n\tkernbench\t- No significant difference, variance well within noise\n\tnetperf-udp\t- 1.34% to 2.28% gain\n\tnetperf-tcp\t- 0.45% to 1.22% gain\n\thackbench\t- Small variances, very close to noise\n\tsysbench\t- Very small gains\n\nx86-64:\tAMD Phenom 9950 1.3GHz with 8G RAM (no-brand machine)\n\tkernbench\t- No significant difference, variance well within noise\n\tnetperf-udp\t- 1.83% to 10.42% gains\n\tnetperf-tcp\t- No conclusive until buffer \u003e\u003d PAGE_SIZE\n\t\t\t\t4096\t+15.83%\n\t\t\t\t8192\t+ 0.34% (not significant)\n\t\t\t\t16384\t+ 1%\n\thackbench\t- Small gains, very close to noise\n\tsysbench\t- 0.79% to 1.6% gain\n\nppc64:\tPPC970MP 2.5GHz with 10GB RAM (it\u0027s a terrasoft powerstation)\n\tkernbench\t- No significant difference, variance well within noise\n\tnetperf-udp\t- 2-3% gain for almost all buffer sizes tested\n\tnetperf-tcp\t- losses on small buffers, gains on larger buffers\n\t\t\t possibly indicates some bad caching effect.\n\thackbench\t- No significant difference\n\tsysbench\t- 2-4% gain\n\nThis patch:\n\nCurrently the per-cpu page allocator searches the PCP list for pages of\nthe correct migrate-type to reduce the possibility of pages being\ninappropriate placed from a fragmentation perspective. This search is\npotentially expensive in a fast-path and undesirable. Splitting the\nper-cpu list into multiple lists increases the size of a per-cpu structure\nand this was potentially a major problem at the time the search was\nintroduced. These problem has been mitigated as now only the necessary\nnumber of structures is allocated for the running system.\n\nThis patch replaces a list search in the per-cpu allocator with one list\nper migrate type. The potential snag with this approach is when bulk\nfreeing pages. We round-robin free pages based on migrate type which has\nlittle bearing on the cache hotness of the page and potentially checks\nempty lists repeatedly in the event the majority of PCP pages are of one\ntype.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.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": "f86296317434b21585e229f6c49a33cb9ebab4d3", "tree": "d4fb05d4aee1a8e373ec053e7316dc9847b2c417", "parents": [ "1a8670a29b5277cbe601f74ab63d2c5211fb3005" ], "author": { "name": "Wu Fengguang", "email": "fengguang.wu@intel.com", "time": "Mon Sep 21 17:03:11 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:39 2009 -0700" }, "message": "mm: do batched scans for mem_cgroup\n\nFor mem_cgroup, shrink_zone() may call shrink_list() with nr_to_scan\u003d1, in\nwhich case shrink_list() _still_ calls isolate_pages() with the much\nlarger SWAP_CLUSTER_MAX. It effectively scales up the inactive list scan\nrate by up to 32 times.\n\nFor example, with 16k inactive pages and DEF_PRIORITY\u003d12, (16k \u003e\u003e 12)\u003d4.\nSo when shrink_zone() expects to scan 4 pages in the active/inactive list,\nthe active list will be scanned 4 pages, while the inactive list will be\n(over) scanned SWAP_CLUSTER_MAX\u003d32 pages in effect. And that could break\nthe balance between the two lists.\n\nIt can further impact the scan of anon active list, due to the anon\nactive/inactive ratio rebalance logic in balance_pgdat()/shrink_zone():\n\ninactive anon list over scanned \u003d\u003e inactive_anon_is_low() \u003d\u003d TRUE\n \u003d\u003e shrink_active_list()\n \u003d\u003e active anon list over scanned\n\nSo the end result may be\n\n- anon inactive \u003d\u003e over scanned\n- anon active \u003d\u003e over scanned (maybe not as much)\n- file inactive \u003d\u003e over scanned\n- file active \u003d\u003e under scanned (relatively)\n\nThe accesses to nr_saved_scan are not lock protected and so not 100%\naccurate, however we can tolerate small errors and the resulted small\nimbalanced scan rates between zones.\n\nCc: Rik van Riel \u003criel@redhat.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2c85f51d222ccdd8c401d77a36b723a89156810d", "tree": "fb94c6ea243504043e434f0a7d26cfd4831b33a9", "parents": [ "3c1596efe167322dae87f8390d36f91ce2d7f936" ], "author": { "name": "Jan Beulich", "email": "JBeulich@novell.com", "time": "Mon Sep 21 17:03:07 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:38 2009 -0700" }, "message": "mm: also use alloc_large_system_hash() for the PID hash table\n\nThis is being done by allowing boot time allocations to specify that they\nmay want a sub-page sized amount of memory.\n\nOverall this seems more consistent with the other hash table allocations,\nand allows making two supposedly mm-only variables really mm-only\n(nr_{kernel,all}_pages).\n\nSigned-off-by: Jan Beulich \u003cjbeulich@novell.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.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": "78986a678f6ec3759a01976749f4437d8bf2d6c3", "tree": "ec3a4f4d3fe5a40f8809657341ad34a9fc8eb61c", "parents": [ "ceddc3a52d783fabbf1ba623601419b9d6337194" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Mon Sep 21 17:03:02 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:38 2009 -0700" }, "message": "page-allocator: limit the number of MIGRATE_RESERVE pageblocks per zone\n\nAfter anti-fragmentation was merged, a bug was reported whereby devices\nthat depended on high-order atomic allocations were failing. The solution\nwas to preserve a property in the buddy allocator which tended to keep the\nminimum number of free pages in the zone at the lower physical addresses\nand contiguous. To preserve this property, MIGRATE_RESERVE was introduced\nand a number of pageblocks at the start of a zone would be marked\n\"reserve\", the number of which depended on min_free_kbytes.\n\nAnti-fragmentation works by avoiding the mixing of page migratetypes\nwithin the same pageblock. One way of helping this is to increase\nmin_free_kbytes because it becomes less like that it will be necessary to\nplace pages of of MIGRATE_RESERVE is unbounded, the free memory is kept\nthere in large contiguous blocks instead of helping anti-fragmentation as\nmuch as it should. With the page-allocator tracepoint patches applied, it\nwas found during anti-fragmentation tests that the number of\nfragmentation-related events were far higher than expected even with\nmin_free_kbytes at higher values.\n\nThis patch limits the number of MIGRATE_RESERVE blocks that exist per zone\nto two. For example, with a sufficient min_free_kbytes, 4MB of memory\nwill be kept aside on an x86-64 and remain more or less free and\ncontiguous for the systems uptime. This should be sufficient for devices\ndepending on high-order atomic allocations while helping fragmentation\ncontrol when min_free_kbytes is tuned appropriately. As side-effect of\nthis patch is that the reserve variable is converted to int as unsigned\nlong was the wrong type to use when ensuring that only the required number\nof reserve blocks are created.\n\nWith the patches applied, fragmentation-related events as measured by the\npage allocator tracepoints were significantly reduced when running some\nfragmentation stress-tests on systems with min_free_kbytes tuned to a\nvalue appropriate for hugepage allocations at runtime. On x86, the events\nrecorded were reduced by 99.8%, on x86-64 by 99.72% and on ppc64 by\n99.83%.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\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": "0d3d062a6e289e065bd0aa537a6806a1806bf8aa", "tree": "9895e9cb48674d072885af3424e1ef145ec81f28", "parents": [ "e0fff1bd12469c45dab088e353d8882761387bb6" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Mon Sep 21 17:02:44 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:34 2009 -0700" }, "message": "tracing, page-allocator: add trace event for page traffic related to the buddy lists\n\nThe page allocation trace event reports that a page was successfully\nallocated but it does not specify where it came from. When analysing\nperformance, it can be important to distinguish between pages coming from\nthe per-cpu allocator and pages coming from the buddy lists as the latter\nrequires the zone lock to the taken and more data structures to be\nexamined.\n\nThis patch adds a trace event for __rmqueue reporting when a page is being\nallocated from the buddy lists. It distinguishes between being called to\nrefill the per-cpu lists or whether it is a high-order allocation.\nSimilarly, this patch adds an event to catch when the PCP lists are being\ndrained a little and pages are going back to the buddy lists.\n\nThis is trickier to draw conclusions from but high activity on those\nevents could explain why there were a large number of cache misses on a\npage-allocator-intensive workload. The coalescing and splitting of\nbuddies involves a lot of writing of page metadata and cache line bounces\nnot to mention the acquisition of an interrupt-safe lock necessary to\nenter this path.\n\n[akpm@linux-foundation.org: fix build]\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Larry Woodman \u003clwoodman@redhat.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Li Ming Chun \u003cmacli@brc.ubc.ca\u003e\nReviewed-by: 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": "e0fff1bd12469c45dab088e353d8882761387bb6", "tree": "dc120a7597bbd4f3841f951346dbe1f7b85dd3fb", "parents": [ "4b4f278c030aa4b6ee0915f396e9a9478d92d610" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Mon Sep 21 17:02:42 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:34 2009 -0700" }, "message": "tracing, page-allocator: add trace events for anti-fragmentation falling back to other migratetypes\n\nFragmentation avoidance depends on being able to use free pages from lists\nof the appropriate migrate type. In the event this is not possible,\n__rmqueue_fallback() selects a different list and in some circumstances\nchange the migratetype of the pageblock. Simplistically, the more times\nthis event occurs, the more likely that fragmentation will be a problem\nlater for hugepage allocation at least but there are other considerations\nsuch as the order of page being split to satisfy the allocation.\n\nThis patch adds a trace event for __rmqueue_fallback() that reports what\npage is being used for the fallback, the orders of relevant pages, the\ndesired migratetype and the migratetype of the lists being used, whether\nthe pageblock changed type and whether this event is important with\nrespect to fragmentation avoidance or not. This information can be used\nto help analyse fragmentation avoidance and help decide whether\nmin_free_kbytes should be increased or not.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Larry Woodman \u003clwoodman@redhat.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Li Ming Chun \u003cmacli@brc.ubc.ca\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4b4f278c030aa4b6ee0915f396e9a9478d92d610", "tree": "10825c2d197977bc9080093a6ecbd3ce80723876", "parents": [ "38a398572fa2d8124f7479e40db581b5b72719c9" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Mon Sep 21 17:02:41 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:34 2009 -0700" }, "message": "tracing, page-allocator: add trace events for page allocation and page freeing\n\nThis patch adds trace events for the allocation and freeing of pages,\nincluding the freeing of pagevecs. Using the events, it will be known\nwhat struct page and pfns are being allocated and freed and what the call\nsite was in many cases.\n\nThe page alloc tracepoints be used as an indicator as to whether the\nworkload was heavily dependant on the page allocator or not. You can make\na guess based on vmstat but you can\u0027t get a per-process breakdown.\nDepending on the call path, the call_site for page allocation may be\n__get_free_pages() instead of a useful callsite. Instead of passing down\na return address similar to slab debugging, the user should enable the\nstacktrace and seg-addr options to get a proper stack trace.\n\nThe pagevec free tracepoint has a different usecase. It can be used to\nget a idea of how many pages are being dumped off the LRU and whether it\nis kswapd doing the work or a process doing direct reclaim.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nReviewed-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Larry Woodman \u003clwoodman@redhat.com\u003e\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nCc: Li Ming Chun \u003cmacli@brc.ubc.ca\u003e\nReviewed-by: 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": "38a398572fa2d8124f7479e40db581b5b72719c9", "tree": "cad43f1cb00b760507278cc7b55f8e7fa4ab4fab", "parents": [ "cc013a88906bad9d2832d6316de1c7dbc1c2a794" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Mon Sep 21 17:02:39 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:34 2009 -0700" }, "message": "page-allocator: remove dead function free_cold_page()\n\nThe function free_cold_page() has no callers so delete it.\n\nSigned-off-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": "2f66a68f3fac2e94da360c342ff78ab45553f86c", "tree": "ec8de9c7d18d866e63e2c9bcbecf902896b687bd", "parents": [ "fe1ff49d0d1c30254dbfc84c3786eb538e0cc7d1" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Mon Sep 21 17:02:31 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:33 2009 -0700" }, "message": "page-allocator: change migratetype for all pageblocks within a high-order page during __rmqueue_fallback\n\nWhen there are no pages of a target migratetype free, the page allocator\nselects a high-order block of another migratetype to allocate from. When\nthe order of the page taken is greater than pageblock_order, all\npageblocks within that high-order page should change migratetype so that\npages are later freed to the correct free-lists.\n\nThe current behaviour is that pageblocks change migratetype if the order\nbeing split matches the pageblock_order. When pageblock_order \u003c\nMAX_ORDER-1, ownership is not changing correct and pages are being later\nfreed to the incorrect list and this impacts fragmentation avoidance.\n\nThis patch changes all pageblocks within the high-order page being split\nto the correct migratetype. Without the patch, allocation success rates\nfor hugepages under stress were about 59% of physical memory on x86-64.\nWith the patch applied, this goes up to 65%.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andy Whitcroft \u003capw@shadowen.org\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.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": "451ea25da71590361c71bf3044c55b870a887d53", "tree": "e2e9de6e7c1fb4f79c0413a3c4d401ec9263b722", "parents": [ "bf88c8c83e4425d17e29daa5354ffb1f8ba7b225" ], "author": { "name": "Johannes Weiner", "email": "hannes@cmpxchg.org", "time": "Mon Sep 21 17:01:48 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:30 2009 -0700" }, "message": "mm: perform non-atomic test-clear of PG_mlocked on free\n\nBy the time PG_mlocked is cleared in the page freeing path, nobody else is\nlooking at our page-\u003eflags anymore.\n\nIt is thus safe to make the test-and-clear non-atomic and thereby removing\nan unnecessary and expensive operation from a hotpath.\n\nSigned-off-by: Johannes Weiner \u003channes@cmpxchg.org\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\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": "945a11136ebdfa7fcce319ee6215958e84cb85f6", "tree": "0553ecd55e5805ea147d6a0f6eae0686d5630cf5", "parents": [ "a26f5320c4ee3d46a0da48fa0f3ac6a00b575793" ], "author": { "name": "Akinobu Mita", "email": "akinobu.mita@gmail.com", "time": "Mon Sep 21 17:01:47 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:30 2009 -0700" }, "message": "mm: add gfp mask checking for __get_free_pages()\n\n__get_free_pages() with __GFP_HIGHMEM is not safe because the return\naddress cannot represent a highmem page. get_zeroed_page() already has\nsuch a debug checking.\n\nSigned-off-by: Akinobu Mita \u003cakinobu.mita@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": "a731286de62294b63d8ceb3c5914ac52cc17e690", "tree": "c321e14500ec264e37fd103ffa71c7b133088010", "parents": [ "b35ea17b7bbf5dea35faa0de11030acc620c3197" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Sep 21 17:01:37 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:29 2009 -0700" }, "message": "mm: vmstat: add isolate pages\n\nIf the system is running a heavy load of processes then concurrent reclaim\ncan isolate a large number of pages from the LRU. /proc/vmstat and the\noutput generated for an OOM do not show how many pages were isolated.\n\nThis has been observed during process fork bomb testing (mstctl11 in LTP).\n\nThis patch shows the information about isolated pages.\n\nReproduced via:\n\n-----------------------\n% ./hackbench 140 process 1000\n \u003d\u003e OOM occur\n\nactive_anon:146 inactive_anon:0 isolated_anon:49245\n active_file:79 inactive_file:18 isolated_file:113\n unevictable:0 dirty:0 writeback:0 unstable:0 buffer:39\n free:370 slab_reclaimable:309 slab_unreclaimable:5492\n mapped:53 shmem:15 pagetables:28140 bounce:0\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b259fbde0a86085264c89aa2ce9c6e35792a1aad", "tree": "43c43fcab1fd6eb897f7348a3b2c8071d61f2b6d", "parents": [ "4b02108ac1b3354a22b0d83c684797692efdc395" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Sep 21 17:01:34 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:27 2009 -0700" }, "message": "mm: update alloc_flags after oom killer has been called\n\nIt is possible for the oom killer to select current as the task to kill.\nWhen this happens, alloc_flags needs to be updated accordingly to set\nALLOC_NO_WATERMARKS so the subsequent allocation attempt may use memory\nreserves as the result of its thread having TIF_MEMDIE set if the\nallocation is not __GFP_NOMEMALLOC.\n\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\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": "4b02108ac1b3354a22b0d83c684797692efdc395", "tree": "9f65d6e8e35ddce940e7b9da6305cf5a19e5904e", "parents": [ "c6a7f5728a1db45d30df55a01adc130b4ab0327c" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Sep 21 17:01:33 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:27 2009 -0700" }, "message": "mm: oom analysis: add shmem vmstat\n\nRecently we encountered OOM problems due to memory use of the GEM cache.\nGenerally a large amuont of Shmem/Tmpfs pages tend to create a memory\nshortage problem.\n\nWe often use the following calculation to determine the amount of shmem\npages:\n\nshmem \u003d NR_ACTIVE_ANON + NR_INACTIVE_ANON - NR_ANON_PAGES\n\nhowever the expression does not consider isolated and mlocked pages.\n\nThis patch adds explicit accounting for pages used by shmem and tmpfs.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nAcked-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c6a7f5728a1db45d30df55a01adc130b4ab0327c", "tree": "36649bc6ebb959841a5097c699968722cfd99c4d", "parents": [ "71de1ccbe1fb40203edd3beb473f8580d917d2ca" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Sep 21 17:01:32 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:27 2009 -0700" }, "message": "mm: oom analysis: Show kernel stack usage in /proc/meminfo and OOM log output\n\nThe amount of memory allocated to kernel stacks can become significant and\ncause OOM conditions. However, we do not display the amount of memory\nconsumed by stacks.\n\nAdd code to display the amount of memory used for stacks in /proc/meminfo.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: 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": "71de1ccbe1fb40203edd3beb473f8580d917d2ca", "tree": "63417ce9538883348350a879bf359e6100c244de", "parents": [ "4a0aa73f1d613bf19bc8610bf090c941ef49d720" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Sep 21 17:01:31 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:27 2009 -0700" }, "message": "mm: oom analysis: add buffer cache information to show_free_areas()\n\nIt is often useful to know the statistics for all pages that are handled\nlike page cache pages when looking at OOM log output.\n\nTherefore show_free_areas() should also display buffer cache statistics.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: 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": "4a0aa73f1d613bf19bc8610bf090c941ef49d720", "tree": "5b6ae69c182e65e9711864cff150536a2a216bfb", "parents": [ "3b2b9a875ddcbf9fcd667db9f961a6a163bd083f" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Sep 21 17:01:30 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:27 2009 -0700" }, "message": "mm: oom analysis: add per-zone statistics to show_free_areas()\n\nshow_free_areas() displays only a limited amount of zone counters. This\npatch includes additional counters in the display to allow easier\ndebugging. This may be especially useful if an OOM is due to running out\nof DMA memory.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nAcked-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: 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": "3701b0332330ca1add3e5d56513ef201ff7efdbb", "tree": "a4b47de49b0ebb763f35c3984168a9075cba6052", "parents": [ "b904dcfed6967e9cfc8a54778498f6d289420309" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Mon Sep 21 17:01:29 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:26 2009 -0700" }, "message": "mm: show_free_areas(): display slab pages in two separate fields\n\nIf an OOM happens, we really want to know the number of remaining\nreclaimable pages. So the reclaimable slab and unreclaimable slab fields\nshould not be combined for display.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@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": "55a4462af5722d2814858bc51ee8d58ca29544ab", "tree": "617c2f3676a41507b7d6e4436dce0ce9b297ebc8", "parents": [ "abfc3488118d48a2b8cce5a2345901aac6b03fee" ], "author": { "name": "Randy Dunlap", "email": "randy.dunlap@oracle.com", "time": "Mon Sep 21 17:01:20 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:26 2009 -0700" }, "message": "page_alloc: fix kernel-doc warning\n\nUmmark function as having kernel-doc notation, fixing the kernel-doc\nwarning.\n\nWarning(mm/page_alloc.c:4519): No description found for parameter \u0027zone\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": "8e7e40d9658cf7b2ae2b76484e235799b3ddaa97", "tree": "7dfc66d7878d5d4df8f29c56f9195f653626c378", "parents": [ "6fb332fabd7288af9dbe7992394aa6ba97c1a537" ], "author": { "name": "Shaohua Li", "email": "shaohua.li@intel.com", "time": "Mon Sep 21 17:01:18 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:26 2009 -0700" }, "message": "memory hotplug: make pages from movable zone always isolatable\n\nPages on movable zone have two types, MIGRATE_MOVABLE and MIGRATE_RESERVE,\nboth them can be movable, because only movable memory allocation can get\npages from movable zone. This makes pages in movable zone always be able\nto migrate.\n\nSigned-off-by: Shaohua Li \u003cshaohua.li@intel.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Yakui Zhao \u003cyakui.zhao@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6fb332fabd7288af9dbe7992394aa6ba97c1a537", "tree": "261fe72f01461d65532730f283108be2306b80b5", "parents": [ "112067f0905b2de862c607ee62411cf47d2fe5c4" ], "author": { "name": "Shaohua Li", "email": "shaohua.li@intel.com", "time": "Mon Sep 21 17:01:17 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:25 2009 -0700" }, "message": "memory hotplug: exclude isolated page from pco page alloc\n\nPages marked as isolated should not be allocated again. If such pages\nreside in pcp list, they can be allocated too, so there is a ping-pong\nmemory offline frees some pages to pcp list and the pages get allocated\nand then memory offline frees them again, this loop will happen again and\nagain.\n\nThis should have no impact in normal code path, because in normal code\npath, pages in pcp list aren\u0027t isolated, and below loop will break in the\nfirst entry.\n\nSigned-off-by: Shaohua Li \u003cshaohua.li@intel.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Yakui Zhao \u003cyakui.zhao@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "112067f0905b2de862c607ee62411cf47d2fe5c4", "tree": "55575b100292b764f945e4d9395989e8a734f883", "parents": [ "478b81fd84a299adb401dbbae296f3767e552999" ], "author": { "name": "Shaohua Li", "email": "shaohua.li@intel.com", "time": "Mon Sep 21 17:01:16 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:25 2009 -0700" }, "message": "memory hotplug: update zone pcp at memory online\n\nIn my test, 128M memory is hot added, but zone\u0027s pcp batch is 0, which is\nan obvious error. When pages are onlined, zone pcp should be updated\naccordingly.\n\n[akpm@linux-foundation.org: fix warnings]\nSigned-off-by: Shaohua Li \u003cshaohua.li@intel.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Yakui Zhao \u003cyakui.zhao@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "478b81fd84a299adb401dbbae296f3767e552999", "tree": "64651cc58d04a54e4eca296d4124c6825a57329c", "parents": [ "a5abeeacc44bbef2935a7a8e939264c28962def2" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Mon Sep 21 17:01:15 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:25 2009 -0700" }, "message": "mm: remove obsoleted alloc_pages cpuset comment\n\nWhen a cpuset\u0027s nodemask is updated, all attached tasks have their cached\ntask-\u003emems_allowed updated by a heap instead of requiring an explicit call\nto cpuset_update_task_memory_state(), which has since been removed in\n58568d2a8215cb6f55caf2332017d7bdff954e1c (\"cpuset,mm: update tasks\u0027\nmems_allowed in time\").\n\nRemove the obsoleted comment from the page allocator.\n\nCc: Paul Menage \u003cmenage@google.com\u003e\nAcked-by: Miao Xie \u003cmiaox@cn.fujitsu.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": "2a7684a23e9c263c2a1e8b2c0027ad1836a0f9df", "tree": "b9769d2f391d76d9c84c687aa771d36cc539025e", "parents": [ "888b9f7c58ebe8303bad817cd554df887a683957" ], "author": { "name": "Wu Fengguang", "email": "fengguang.wu@intel.com", "time": "Wed Sep 16 11:50:12 2009 +0200" }, "committer": { "name": "Andi Kleen", "email": "ak@linux.intel.com", "time": "Wed Sep 16 11:50:12 2009 +0200" }, "message": "HWPOISON: check and isolate corrupted free pages v2\n\nIf memory corruption hits the free buddy pages, we can safely ignore them.\nNo one will access them until page allocation time, then prep_new_page()\nwill automatically check and isolate PG_hwpoison page for us (for 0-order\nallocation).\n\nThis patch expands prep_new_page() to check every component page in a high\norder page allocation, in order to completely stop PG_hwpoison pages from\nbeing recirculated.\n\nNote that the common case -- only allocating a single page, doesn\u0027t\ndo any more work than before. Allocating \u003e order 0 does a bit more work,\nbut that\u0027s relatively uncommon.\n\nThis simple implementation may drop some innocent neighbor pages, hopefully\nit is not a big problem because the event should be rare enough.\n\nThis patch adds some runtime costs to high order page users.\n\n[AK: Improved description]\n\nv2: Andi Kleen:\nPort to -mm code\nMove check into separate function.\nDon\u0027t dump stack in bad_pages for hwpoisoned pages.\nSigned-off-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nSigned-off-by: Andi Kleen \u003cak@linux.intel.com\u003e\n" }, { "commit": "dd5d241ea955006122d76af88af87de73fec25b4", "tree": "2ca12406f407d476b1ba473dc376d1e621a383f6", "parents": [ "a190887b58c32d19c2eee007c5eb8faa970a69ba" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Sat Sep 05 11:17:11 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Sep 05 11:30:42 2009 -0700" }, "message": "page-allocator: always change pageblock ownership when anti-fragmentation is disabled\n\nOn low-memory systems, anti-fragmentation gets disabled as fragmentation\ncannot be avoided on a sufficiently large boundary to be worthwhile. Once\ndisabled, there is a period of time when all the pageblocks are marked\nMOVABLE and the expectation is that they get marked UNMOVABLE at each call\nto __rmqueue_fallback().\n\nHowever, when MAX_ORDER is large the pageblocks do not change ownership\nbecause the normal criteria are not met. This has the effect of\nprematurely breaking up too many large contiguous blocks. This is most\nserious on NOMMU systems which depend on high-order allocations to boot.\nThis patch causes pageblocks to change ownership on every fallback when\nanti-fragmentation is disabled. This prevents the large blocks being\nprematurely broken up.\n\nThis is a fix to commit 49255c619fbd482d704289b5eb2795f8e3b7ff2e [page\nallocator: move check for disabled anti-fragmentation out of fastpath] and\nthe problem affects 2.6.31-rc8.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nTested-by: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: David Howells \u003cdhowells@redhat.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nAcked-by: Greg Ungerer \u003cgerg@snapgear.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7f9cfb31030737a7fc9a1cbca3fd01bec184c849", "tree": "a8db215579bc073fb2b1d6d9690dbb78c79aa52d", "parents": [ "503f7944fac68f4fdf71f8ebd06907f51eb64515" ], "author": { "name": "Bo Liu", "email": "bo-liu@hotmail.com", "time": "Tue Aug 18 14:11:19 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Aug 18 16:31:13 2009 -0700" }, "message": "mm: build_zonelists(): move clear node_load[] to __build_all_zonelists()\n\nIf node_load[] is cleared everytime build_zonelists() is\ncalled,node_load[] will have no help to find the next node that should\nappear in the given node\u0027s fallback list.\n\nBecause of the bug, zonelist\u0027s node_order is not calculated as expected.\nThis bug affects on big machine, which has asynmetric node distance.\n\n[synmetric NUMA\u0027s node distance]\n 0 1 2\n0 10 12 12\n1 12 10 12\n2 12 12 10\n\n[asynmetric NUMA\u0027s node distance]\n 0 1 2\n0 10 12 20\n1 12 10 14\n2 20 14 10\n\nThis (my bug) is very old but no one has reported this for a long time.\nMaybe because the number of asynmetric NUMA is very small and they use\ncpuset for customizing node memory allocation fallback.\n\n[akpm@linux-foundation.org: fix CONFIG_NUMA\u003dn build]\nSigned-off-by: Bo Liu \u003cbo-liu@hotmail.com\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.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": "1fc28b70fe2dbf87e061b6ce5091a1f8e4e5d4e7", "tree": "35c109a52c3dd8a509b5dd1318eb4963b45a8b01", "parents": [ "887032670d47366a8c8f25396ea7c14b7b2cc620" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Wed Jul 29 15:04:08 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 29 19:10:35 2009 -0700" }, "message": "page-allocator: allow too high-order warning messages to be suppressed with __GFP_NOWARN\n\nThe page allocator warns once when an order \u003e\u003d MAX_ORDER is specified.\nThis is to catch callers of the allocator that are always falling back to\ntheir worst-case when it was not expected. However, there are cases where\nthe caller is behaving correctly but cannot suppress the warning. This\npatch allows the warning to be suppressed by the callers by specifying\n__GFP_NOWARN.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Arnaldo Carvalho de Melo \u003cacme@redhat.com\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nCc: \"Rafael J. Wysocki\" \u003crjw@sisk.pl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6583bb64fc370842b32a87c67750c26f6d559af0", "tree": "321681ebc6ff893318d67859b24f199b9111cbc8", "parents": [ "e084b2d95e48b31aa45f9c49ffc6cdae8bdb21d4" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Wed Jul 29 15:02:06 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 29 19:10:34 2009 -0700" }, "message": "mm: avoid endless looping for oom killed tasks\n\nIf a task is oom killed and still cannot find memory when trying with\nno watermarks, it\u0027s better to fail the allocation attempt than to loop\nendlessly. Direct reclaim has already failed and the oom killer will\nbe a no-op since current has yet to die, so there is no other\nalternative for allocations that are not __GFP_NOFAIL.\n\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e084b2d95e48b31aa45f9c49ffc6cdae8bdb21d4", "tree": "ff15d36a3a1e49fdbd5080decb7ab00afdd60099", "parents": [ "51fbb4bab6c8710eb897ab3fb06efbbc921f3a8d" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Wed Jul 29 15:02:04 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 29 19:10:34 2009 -0700" }, "message": "page-allocator: preserve PFN ordering when __GFP_COLD is set\n\nFix a post-2.6.24 performace regression caused by\n3dfa5721f12c3d5a441448086bee156887daa961 (\"page-allocator: preserve PFN\nordering when __GFP_COLD is set\").\n\nNarayanan reports \"The regression is around 15%. There is no disk controller\nas our setup is based on Samsung OneNAND used as a memory mapped device on a\nOMAP2430 based board.\"\n\nThe page allocator tries to preserve contiguous PFN ordering when returning\npages such that repeated callers to the allocator have a strong chance of\ngetting physically contiguous pages, particularly when external fragmentation\nis low. However, of the bulk of the allocations have __GFP_COLD set as they\nare due to aio_read() for example, then the PFNs are in reverse PFN order.\nThis can cause performance degration when used with IO controllers that could\nhave merged the requests.\n\nThis patch attempts to preserve the contiguous ordering of PFNs for users of\n__GFP_COLD.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReported-by: Narayananu Gopalakrishnan \u003cnarayanan.g@samsung.com\u003e\nTested-by: Narayanan Gopalakrishnan \u003cnarayanan.g@samsung.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@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": "7638d5322bd89d49e013a03fe2afaeb6d214fabd", "tree": "cfafc7c6c9f169a7a308c290363dde765e21735d", "parents": [ "dd0d9a46f573b086a67522f819566427dba9c4c7", "264ef8a904943ed7d0b04fa958894d7a5c2b2c61" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Jul 12 12:24:35 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Jul 12 12:24:35 2009 -0700" }, "message": "Merge branch \u0027kmemleak\u0027 of git://linux-arm.org/linux-2.6\n\n* \u0027kmemleak\u0027 of git://linux-arm.org/linux-2.6:\n kmemleak: Remove alloc_bootmem annotations introduced in the past\n kmemleak: Add callbacks to the bootmem allocator\n kmemleak: Allow partial freeing of memory blocks\n kmemleak: Trace the kmalloc_large* functions in slub\n kmemleak: Scan objects allocated during a scanning episode\n kmemleak: Do not acquire scan_mutex in kmemleak_open()\n kmemleak: Remove the reported leaks number limitation\n kmemleak: Add more cond_resched() calls in the scanning thread\n kmemleak: Renice the scanning thread to +10\n" }, { "commit": "8aa7e847d834ed937a9ad37a0f2ad5b8584c1ab0", "tree": "76c8b4f1362a928d426f2201790ab5d128f57724", "parents": [ "c2cc49a2f8a479dde96a599646d30b6cc9dbed78" ], "author": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Thu Jul 09 14:52:32 2009 +0200" }, "committer": { "name": "Jens Axboe", "email": "axboe@carl.(none)", "time": "Fri Jul 10 20:31:53 2009 +0200" }, "message": "Fix congestion_wait() sync/async vs read/write confusion\n\nCommit 1faa16d22877f4839bd433547d770c676d1d964c accidentally broke\nthe bdi congestion wait queue logic, causing us to wait on congestion\nfor WRITE (\u003d\u003d 1) when we really wanted BLK_RW_ASYNC (\u003d\u003d 0) instead.\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "264ef8a904943ed7d0b04fa958894d7a5c2b2c61", "tree": "ddab997d86b591cf67de3afc2f23e7d9f2fb1207", "parents": [ "ec3a354bd46cbdaa7933ba57a142ee2d2dbde0e5" ], "author": { "name": "Catalin Marinas", "email": "catalin.marinas@arm.com", "time": "Tue Jul 07 10:33:01 2009 +0100" }, "committer": { "name": "Catalin Marinas", "email": "catalin.marinas@arm.com", "time": "Thu Jul 09 17:07:02 2009 +0100" }, "message": "kmemleak: Remove alloc_bootmem annotations introduced in the past\n\nkmemleak_alloc() calls were added in some places where alloc_bootmem was\ncalled. Since now kmemleak tracks bootmem allocations, these explicit\ncalls should be run.\n\nSigned-off-by: Catalin Marinas \u003ccatalin.marinas@arm.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nAcked-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\n" }, { "commit": "5bfd7560979062ad75c9805c1719cec990b5db29", "tree": "cdefaa4920ad4f87f4cd66f96cb4112b2be2bde3", "parents": [ "c8236db9cd7aa492dcfcdcca702638e704abed49" ], "author": { "name": "Kevin Cernekee", "email": "cernekee@gmail.com", "time": "Sun Jul 05 12:08:19 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jul 06 13:57:03 2009 -0700" }, "message": "Fix virt_to_phys() warnings\n\nThese warnings were observed on MIPS32 using 2.6.31-rc1 and gcc-4.2.0:\n\nmm/page_alloc.c: In function \u0027alloc_pages_exact\u0027:\nmm/page_alloc.c:1986: warning: passing argument 1 of \u0027virt_to_phys\u0027 makes pointer from integer without a cast\n\ndrivers/usb/mon/mon_bin.c: In function \u0027mon_alloc_buff\u0027:\ndrivers/usb/mon/mon_bin.c:1264: warning: passing argument 1 of \u0027virt_to_phys\u0027 makes pointer from integer without a cast\n\n[akpm@linux-foundation.org: fix kernel/perf_counter.c too]\nSigned-off-by: Kevin Cernekee \u003ccernekee@gmail.com\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nCc: Ralf Baechle \u003cralf@linux-mips.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "66918dcdf91ad101194c749c18099e836ba3de2b", "tree": "c7c2b3e4665a20fc670ea09a8b2da7a9d289984d", "parents": [ "b37f2d4de6dfce4bfd6df311af80e4d61458ee1e" ], "author": { "name": "Yinghai Lu", "email": "yinghai@kernel.org", "time": "Tue Jun 30 11:41:37 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 30 18:56:01 2009 -0700" }, "message": "x86: only clear node_states for 64bit\n\nNathan reported that\n\n| commit 73d60b7f747176dbdff826c4127d22e1fd3f9f74\n| Author: Yinghai Lu \u003cyinghai@kernel.org\u003e\n| Date: Tue Jun 16 15:33:00 2009 -0700\n|\n| page-allocator: clear N_HIGH_MEMORY map before we set it again\n|\n| SRAT tables may contains nodes of very small size. The arch code may\n| decide to not activate such a node. However, currently the early boot\n| code sets N_HIGH_MEMORY for such nodes. These nodes therefore seem to be\n| active although these nodes have no present pages.\n|\n| For 64bit N_HIGH_MEMORY \u003d\u003d N_NORMAL_MEMORY, so that works for 64 bit too\n\nunintentionally and incorrectly clears the cpuset.mems cgroup attribute on\nan i386 kvm guest, meaning that cpuset.mems can not be used.\n\nFix this by only clearing node_states[N_NORMAL_MEMORY] for 64bit only.\nand need to do save/restore for that in find_zone_movable_pfn\n\nReported-by: Nathan Lynch \u003cntl@pobox.com\u003e\nTested-by: Nathan Lynch \u003cntl@pobox.com\u003e\nSigned-off-by: Yinghai Lu \u003cyinghai@kernel.org\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e,\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4923abf9f1a4c1864af438a57c1f3686548230e9", "tree": "cbe9762f552478ce0c2a68728b45d0c604822882", "parents": [ "c82e6d450fda56cb2d4f68534173d3cd11b32f9f" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jun 24 12:16:49 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jun 24 12:16:49 2009 -0700" }, "message": "Don\u0027t warn about order-1 allocations with __GFP_NOFAIL\n\nTraditionally, we never failed small orders (even regardless of any\n__GFP_NOFAIL flags), and slab will allocate order-1 allocations even for\nsmall allocations that could fit in a single page (in order to avoid\nexcessive fragmentation).\n\nMaybe we should remove this warning entirely, but before making that\njudgement, at least limit it to bigger allocations.\n\nAcked-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "364df0ebfbbb1330bfc6ca159f4d6020efc15a12", "tree": "80c79bf145d8388ad96a0f7c47a4d25642e403a1", "parents": [ "01ff53f416757da416413bc32229770a8448b6ef" ], "author": { "name": "Dimitri Sivanich", "email": "sivanich@sgi.com", "time": "Tue Jun 23 12:37:04 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 23 12:50:05 2009 -0700" }, "message": "mm: fix handling of pagesets for downed cpus\n\nAfter downing/upping a cpu, an attempt to set\n/proc/sys/vm/percpu_pagelist_fraction results in an oops in\npercpu_pagelist_fraction_sysctl_handler().\n\nIf a processor is downed then we need to set the pageset pointer back to\nthe boot pageset.\n\nUpdates of the high water marks should not access pagesets of unpopulated\nzones (those pointer go to the boot pagesets which would be no longer\nfunctional if their size would be increased beyond zero).\n\nSigned-off-by: Dimitri Sivanich \u003csivanich@sgi.com\u003e\nSigned-off-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\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": "c277331d5fbaae5772ed19862feefa91f4e477d3", "tree": "fcd980b58d9487421e9b0c45b7c082fa1302debb", "parents": [ "9063c61fd5cbd6f42e95929aa0e02380c9e15656" ], "author": { "name": "Johannes Weiner", "email": "hannes@cmpxchg.org", "time": "Fri Jun 19 19:30:56 2009 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Jun 20 16:08:22 2009 -0700" }, "message": "mm: page_alloc: clear PG_locked before checking flags on free\n\nda456f1 \"page allocator: do not disable interrupts in free_page_mlock()\" moved\nthe PG_mlocked clearing after the flag sanity checking which makes mlocked\npages always trigger \u0027bad page\u0027. Fix this by clearing the bit up front.\n\nReported--and-debugged-by: Peter Chubb \u003cpeter.chubb@nicta.com.au\u003e\nSigned-off-by: Johannes Weiner \u003channes@cmpxchg.org\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nTested-by: Maxim Levitsky \u003cmaximlevitsky@gmail.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "dcce284a259373f9e5570f2e33f79eca84fcf565", "tree": "afc4b23208974f17c080ea3d2ecfbaca4254c010", "parents": [ "9729a6eb5878a3daa18395f2b5fb38bf9359a761" ], "author": { "name": "Benjamin Herrenschmidt", "email": "benh@kernel.crashing.org", "time": "Thu Jun 18 13:24:12 2009 +1000" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jun 18 13:12:57 2009 -0700" }, "message": "mm: Extend gfp masking to the page allocator\n\nThe page allocator also needs the masking of gfp flags during boot,\nso this moves it out of slab/slub and uses it with the page allocator\nas well.\n\nSigned-off-by: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nAcked-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "517d08699b250021303f9a7cf0d758b6dc0748ed", "tree": "5e5b0134c3fffb78fe9d8b1641a64ff28fdd7bbc", "parents": [ "8eeee4e2f04fc551f50c9d9847da2d73d7d33728", "a34601c5d84134055782ee031d58d82f5440e918" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:50:13 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:50:13 2009 -0700" }, "message": "Merge branch \u0027akpm\u0027\n\n* akpm: (182 commits)\n fbdev: bf54x-lq043fb: use kzalloc over kmalloc/memset\n fbdev: *bfin*: fix __dev{init,exit} markings\n fbdev: *bfin*: drop unnecessary calls to memset\n fbdev: bfin-t350mcqb-fb: drop unused local variables\n fbdev: blackfin has __raw I/O accessors, so use them in fb.h\n fbdev: s1d13xxxfb: add accelerated bitblt functions\n tcx: use standard fields for framebuffer physical address and length\n fbdev: add support for handoff from firmware to hw framebuffers\n intelfb: fix a bug when changing video timing\n fbdev: use framebuffer_release() for freeing fb_info structures\n radeon: P2G2CLK_ALWAYS_ONb tested twice, should 2nd be P2G2CLK_DAC_ALWAYS_ONb?\n s3c-fb: CPUFREQ frequency scaling support\n s3c-fb: fix resource releasing on error during probing\n carminefb: fix possible access beyond end of carmine_modedb[]\n acornfb: remove fb_mmap function\n mb862xxfb: use CONFIG_OF instead of CONFIG_PPC_OF\n mb862xxfb: restrict compliation of platform driver to PPC\n Samsung SoC Framebuffer driver: add Alpha Channel support\n atmel-lcdc: fix pixclock upper bound detection\n offb: use framebuffer_alloc() to allocate fb_info struct\n ...\n\nManually fix up conflicts due to kmemcheck in mm/slab.c\n" }, { "commit": "fa5e084e43eb14c14942027e1e2e894aeed96097", "tree": "3e7ebf714858e8dd1de7042fd1ef62294a3ec20f", "parents": [ "90afa5de6f3fa89a733861e843377302479fcf7e" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:33:22 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:45 2009 -0700" }, "message": "vmscan: do not unconditionally treat zones that fail zone_reclaim() as full\n\nOn NUMA machines, the administrator can configure zone_reclaim_mode that\nis a more targetted form of direct reclaim. On machines with large NUMA\ndistances for example, a zone_reclaim_mode defaults to 1 meaning that\nclean unmapped pages will be reclaimed if the zone watermarks are not\nbeing met. The problem is that zone_reclaim() failing at all means the\nzone gets marked full.\n\nThis can cause situations where a zone is usable, but is being skipped\nbecause it has been considered full. Take a situation where a large tmpfs\nmount is occuping a large percentage of memory overall. The pages do not\nget cleaned or reclaimed by zone_reclaim(), but the zone gets marked full\nand the zonelist cache considers them not worth trying in the future.\n\nThis patch makes zone_reclaim() return more fine-grained information about\nwhat occured when zone_reclaim() failued. The zone only gets marked full\nif it really is unreclaimable. If it\u0027s a case that the scan did not occur\nor if enough pages were not reclaimed with the limited reclaim_mode, then\nthe zone is simply skipped.\n\nThere is a side-effect to this patch. Currently, if zone_reclaim()\nsuccessfully reclaimed SWAP_CLUSTER_MAX, an allocation attempt would go\nahead. With this patch applied, zone watermarks are rechecked after\nzone_reclaim() does some work.\n\nThis bug was introduced by commit 9276b1bc96a132f4068fdee00983c532f43d3a26\n(\"memory page_alloc zonelist caching speedup\") way back in 2.6.19 when the\nzonelist_cache was introduced. It was not intended that zone_reclaim()\naggressively consider the zone to be full when it failed as full direct\nreclaim can still be an option. Due to the age of the bug, it should be\nconsidered a -stable candidate.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.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": "73d60b7f747176dbdff826c4127d22e1fd3f9f74", "tree": "d4f72cfe145ed3d2ae19a56fe9f9f6424d597c44", "parents": [ "286973552f051404abdb58dd9b2f8f7558efe4e5" ], "author": { "name": "Yinghai Lu", "email": "yinghai@kernel.org", "time": "Tue Jun 16 15:33:00 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:43 2009 -0700" }, "message": "page-allocator: clear N_HIGH_MEMORY map before we set it again\n\nSRAT tables may contains nodes of very small size. The arch code may\ndecide to not activate such a node. However, currently the early boot\ncode sets N_HIGH_MEMORY for such nodes. These nodes therefore seem to be\nactive although these nodes have no present pages.\n\nFor 64bit N_HIGH_MEMORY \u003d\u003d N_NORMAL_MEMORY, so that works for 64 bit too\n\nSigned-off-by: Yinghai Lu \u003cYinghai@kernel.org\u003e\nTested-by: Jack Steiner \u003csteiner@sgi.com\u003e\nAcked-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "82553a937f12352c26fe457510ebab3f512cd3fa", "tree": "c3df31e9953d5f56491576ba019fdc2cd87af926", "parents": [ "4d8b9135c30ccbe46e621fefd862969819003fd6" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Jun 16 15:32:58 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:43 2009 -0700" }, "message": "oom: invoke oom killer for __GFP_NOFAIL\n\nThe oom killer must be invoked regardless of the order if the allocation\nis __GFP_NOFAIL, otherwise it will loop forever when reclaim fails to free\nsome memory.\n\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.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": "6837765963f1723e80ca97b1fae660f3a60d77df", "tree": "a9a6ed4b7e3bf188966da78b04bf39298f24375a", "parents": [ "bce7394a3ef82b8477952fbab838e4a6e8cb47d2" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Tue Jun 16 15:32:51 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:42 2009 -0700" }, "message": "mm: remove CONFIG_UNEVICTABLE_LRU config option\n\nCurrently, nobody wants to turn UNEVICTABLE_LRU off. Thus this\nconfigurability is unnecessary.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nAcked-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: David Woodhouse \u003cdwmw2@infradead.org\u003e\nCc: Matt Mackall \u003cmpm@selenic.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: 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": "bce7394a3ef82b8477952fbab838e4a6e8cb47d2", "tree": "7e2f50300dc4edf471a67c1871f288f031fd84f7", "parents": [ "96cb4df5ddf5e6d5785b5acd4003e3689b87f896" ], "author": { "name": "Minchan Kim", "email": "minchan.kim@gmail.com", "time": "Tue Jun 16 15:32:50 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:42 2009 -0700" }, "message": "page-allocator: reset wmark_min and inactive ratio of zone when hotplug happens\n\nSolve two problems.\n\nWhenever memory hotplug sucessfully happens, zone-\u003epresent_pages\nhave to be changed.\n\n1) Now memory hotplug calls setup_per_zone_wmark_min only when\n online_pages called, not offline_pages.\n\n It breaks balance.\n\n2) If zone-\u003epresent_pages is changed, we also have to change\n zone-\u003einactive_ratio. That\u0027s because inactive_ratio depends on\n zone-\u003epresent_pages.\n\nSigned-off-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nAcked-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "96cb4df5ddf5e6d5785b5acd4003e3689b87f896", "tree": "e6bd74df480e9065617aebec29b4285fa021c919", "parents": [ "bc75d33f0fc1d56e734db1f56d3cfc8097b8e0cf" ], "author": { "name": "Minchan Kim", "email": "minchan.kim@gmail.com", "time": "Tue Jun 16 15:32:49 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:42 2009 -0700" }, "message": "page-allocator: add inactive ratio calculation function of each zone\n\nFactor the per-zone arithemetic inside setup_per_zone_inactive_ratio()\u0027s\nloop into a a separate function, calculate_zone_inactive_ratio(). This\nfunction will be used in a later patch\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "bc75d33f0fc1d56e734db1f56d3cfc8097b8e0cf", "tree": "4dc5054afdff491d8378dee2a235da64d6ad3de6", "parents": [ "b70d94ee438b3fd9c15c7691d7a932a135c18101" ], "author": { "name": "Minchan Kim", "email": "minchan.kim@gmail.com", "time": "Tue Jun 16 15:32:48 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:41 2009 -0700" }, "message": "page-allocator: clean up functions related to pages_min\n\nChange the names of two functions. It doesn\u0027t affect behavior.\n\nPresently, setup_per_zone_pages_min() changes low, high of zone as well as\nmin. So a better name is setup_per_zone_wmarks(). That\u0027s because Mel\nchanged zone-\u003epages_[hig/low/min] to zone-\u003ewatermark array in \"page\nallocator: replace the watermark-related union in struct zone with a\nwatermark[] array\".\n\n * setup_per_zone_pages_min \u003d\u003e setup_per_zone_wmarks\n\nOf course, we have to change init_per_zone_pages_min, too. There are not\npages_min any more.\n\n * init_per_zone_pages_min \u003d\u003e init_per_zone_wmark_min\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7f33d49a2ed546e01f7b1d0607661810f2421859", "tree": "8b05ac7ec2cd123efb266ecaa1bf0bd1487158f8", "parents": [ "75927af8bcb940dad4fe281713d526cb520869ff" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Tue Jun 16 15:32:41 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:40 2009 -0700" }, "message": "mm, PM/Freezer: Disable OOM killer when tasks are frozen\n\nCurrently, the following scenario appears to be possible in theory:\n\n* Tasks are frozen for hibernation or suspend.\n* Free pages are almost exhausted.\n* Certain piece of code in the suspend code path attempts to allocate\n some memory using GFP_KERNEL and allocation order less than or\n equal to PAGE_ALLOC_COSTLY_ORDER.\n* __alloc_pages_internal() cannot find a free page so it invokes the\n OOM killer.\n* The OOM killer attempts to kill a task, but the task is frozen, so\n it doesn\u0027t die immediately.\n* __alloc_pages_internal() jumps to \u0027restart\u0027, unsuccessfully tries\n to find a free page and invokes the OOM killer.\n* No progress can be made.\n\nAlthough it is now hard to trigger during hibernation due to the memory\nshrinking carried out by the hibernation code, it is theoretically\npossible to trigger during suspend after the memory shrinking has been\nremoved from that code path. Moreover, since memory allocations are\ngoing to be used for the hibernation memory shrinking, it will be even\nmore likely to happen during hibernation.\n\nTo prevent it from happening, introduce the oom_killer_disabled switch\nthat will cause __alloc_pages_internal() to fail in the situations in\nwhich the OOM killer would have been called and make the freezer set\nthis switch after tasks have been successfully frozen.\n\n[akpm@linux-foundation.org: be nicer to the namespace]\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nCc: Fengguang Wu \u003cfengguang.wu@gmail.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: Pavel Machek \u003cpavel@ucw.cz\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": "dab48dab37d2770824420d1e01730a107fade1aa", "tree": "81e949d2521d4d8d979808feaa9c2a570337a98c", "parents": [ "720b17e759a50635c429ccaa2ec3d01edb4f92d6" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Tue Jun 16 15:32:37 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:40 2009 -0700" }, "message": "page-allocator: warn if __GFP_NOFAIL is used for a large allocation\n\n__GFP_NOFAIL is a bad fiction. Allocations _can_ fail, and callers should\ndetect and suitably handle this (and not by lamely moving the infinite\nloop up to the caller level either).\n\nAttempting to use __GFP_NOFAIL for a higher-order allocation is even\nworse, so add a once-off runtime check for this to slap people around for\neven thinking about trying it.\n\nCc: David Rientjes \u003crientjes@google.com\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\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": "e9bb35df6f813ca46f8e6273add657643c7df73f", "tree": "64fa88ebc6cda54726522252217f279da4bd516b", "parents": [ "5c87eada68fe5d29a5f67528f81b6e45124f579b" ], "author": { "name": "Cyrill Gorcunov", "email": "gorcunov@openvz.org", "time": "Tue Jun 16 15:32:32 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:39 2009 -0700" }, "message": "mm: setup_per_zone_inactive_ratio - fix comment and make it __init\n\nThe caller of setup_per_zone_inactive_ratio is an __init function. There\nis no need to keep the callee after it completed as well. Also fix a\ncomment.\n\nAcked-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Cyrill Gorcunov \u003cgorcunov@openvz.org\u003e\nReviewed-by: Minchan Kim \u003cminchan.kim@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": "5c87eada68fe5d29a5f67528f81b6e45124f579b", "tree": "11088d75bd2132fecf70e402d4334686461aba7c", "parents": [ "af166777cf451f0373b952ce6766dc1c25385686" ], "author": { "name": "Cyrill Gorcunov", "email": "gorcunov@openvz.org", "time": "Tue Jun 16 15:32:32 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:39 2009 -0700" }, "message": "mm: setup_per_zone_inactive_ratio - do not call for int_sqrt if not needed\n\nint_sqrt() returns 0 if its argument is zero so call it if only needed.\n\nSigned-off-by: Cyrill Gorcunov \u003cgorcunov@openvz.org\u003e\nCc: 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": "6e08a369ee10b361ac1cdcdf4fabd420fd08beb3", "tree": "9dbf870cad025b64781d9051b6680a8a23927e5a", "parents": [ "56e49d218890f49b0057710a4b6fef31f5ffbfec" ], "author": { "name": "Wu Fengguang", "email": "fengguang.wu@intel.com", "time": "Tue Jun 16 15:32:29 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:39 2009 -0700" }, "message": "vmscan: cleanup the scan batching code\n\nThe vmscan batching logic is twisting. Move it into a standalone function\nnr_scan_try_batch() and document it. No behavior change.\n\nSigned-off-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nAcked-by: 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": "20a0307c0396c2edb651401d2f2db193dda2f3c9", "tree": "408fde4bf84223757f5dd150e401e8d9d9df5d36", "parents": [ "a1dd268cf6306565a31a48deff8bf4f6b4b105f7" ], "author": { "name": "Wu Fengguang", "email": "fengguang.wu@intel.com", "time": "Tue Jun 16 15:32:22 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:36 2009 -0700" }, "message": "mm: introduce PageHuge() for testing huge/gigantic pages\n\nA series of patches to enhance the /proc/pagemap interface and to add a\nuserspace executable which can be used to present the pagemap data.\n\nExport 10 more flags to end users (and more for kernel developers):\n\n 11. KPF_MMAP (pseudo flag) memory mapped page\n 12. KPF_ANON (pseudo flag) memory mapped page (anonymous)\n 13. KPF_SWAPCACHE page is in swap cache\n 14. KPF_SWAPBACKED page is swap/RAM backed\n 15. KPF_COMPOUND_HEAD (*)\n 16. KPF_COMPOUND_TAIL (*)\n 17. KPF_HUGE\t\thugeTLB pages\n 18. KPF_UNEVICTABLE page is in the unevictable LRU list\n 19. KPF_HWPOISON hardware detected corruption\n 20. KPF_NOPAGE (pseudo flag) no page frame at the address\n\n (*) For compound pages, exporting _both_ head/tail info enables\n users to tell where a compound page starts/ends, and its order.\n\na simple demo of the page-types tool\n\n# ./page-types -h\npage-types [options]\n -r|--raw Raw mode, for kernel developers\n -a|--addr addr-spec Walk a range of pages\n -b|--bits bits-spec Walk pages with specified bits\n -l|--list Show page details in ranges\n -L|--list-each Show page details one by one\n -N|--no-summary Don\u0027t show summay info\n -h|--help Show this usage message\naddr-spec:\n N one page at offset N (unit: pages)\n N+M pages range from N to N+M-1\n N,M pages range from N to M-1\n N, pages range from N to end\n ,M pages range from 0 to M\nbits-spec:\n bit1,bit2 (flags \u0026 (bit1|bit2)) !\u003d 0\n bit1,bit2\u003dbit1 (flags \u0026 (bit1|bit2)) \u003d\u003d bit1\n bit1,~bit2 (flags \u0026 (bit1|bit2)) \u003d\u003d bit1\n \u003dbit1,bit2 flags \u003d\u003d (bit1|bit2)\nbit-names:\n locked error referenced uptodate\n dirty lru active slab\n writeback reclaim buddy mmap\n anonymous swapcache swapbacked compound_head\n compound_tail huge unevictable hwpoison\n nopage reserved(r) mlocked(r) mappedtodisk(r)\n private(r) private_2(r) owner_private(r) arch(r)\n uncached(r) readahead(o) slob_free(o) slub_frozen(o)\n slub_debug(o)\n (r) raw mode bits (o) overloaded bits\n\n# ./page-types\n flags page-count MB symbolic-flags long-symbolic-flags\n0x0000000000000000 487369 1903 _________________________________\n0x0000000000000014 5 0 __R_D____________________________ referenced,dirty\n0x0000000000000020 1 0 _____l___________________________ lru\n0x0000000000000024 34 0 __R__l___________________________ referenced,lru\n0x0000000000000028 3838 14 ___U_l___________________________ uptodate,lru\n0x0001000000000028 48 0 ___U_l_______________________I___ uptodate,lru,readahead\n0x000000000000002c 6478 25 __RU_l___________________________ referenced,uptodate,lru\n0x000100000000002c 47 0 __RU_l_______________________I___ referenced,uptodate,lru,readahead\n0x0000000000000040 8344 32 ______A__________________________ active\n0x0000000000000060 1 0 _____lA__________________________ lru,active\n0x0000000000000068 348 1 ___U_lA__________________________ uptodate,lru,active\n0x0001000000000068 12 0 ___U_lA______________________I___ uptodate,lru,active,readahead\n0x000000000000006c 988 3 __RU_lA__________________________ referenced,uptodate,lru,active\n0x000100000000006c 48 0 __RU_lA______________________I___ referenced,uptodate,lru,active,readahead\n0x0000000000004078 1 0 ___UDlA_______b__________________ uptodate,dirty,lru,active,swapbacked\n0x000000000000407c 34 0 __RUDlA_______b__________________ referenced,uptodate,dirty,lru,active,swapbacked\n0x0000000000000400 503 1 __________B______________________ buddy\n0x0000000000000804 1 0 __R________M_____________________ referenced,mmap\n0x0000000000000828 1029 4 ___U_l_____M_____________________ uptodate,lru,mmap\n0x0001000000000828 43 0 ___U_l_____M_________________I___ uptodate,lru,mmap,readahead\n0x000000000000082c 382 1 __RU_l_____M_____________________ referenced,uptodate,lru,mmap\n0x000100000000082c 12 0 __RU_l_____M_________________I___ referenced,uptodate,lru,mmap,readahead\n0x0000000000000868 192 0 ___U_lA____M_____________________ uptodate,lru,active,mmap\n0x0001000000000868 12 0 ___U_lA____M_________________I___ uptodate,lru,active,mmap,readahead\n0x000000000000086c 800 3 __RU_lA____M_____________________ referenced,uptodate,lru,active,mmap\n0x000100000000086c 31 0 __RU_lA____M_________________I___ referenced,uptodate,lru,active,mmap,readahead\n0x0000000000004878 2 0 ___UDlA____M__b__________________ uptodate,dirty,lru,active,mmap,swapbacked\n0x0000000000001000 492 1 ____________a____________________ anonymous\n0x0000000000005808 4 0 ___U_______Ma_b__________________ uptodate,mmap,anonymous,swapbacked\n0x0000000000005868 2839 11 ___U_lA____Ma_b__________________ uptodate,lru,active,mmap,anonymous,swapbacked\n0x000000000000586c 30 0 __RU_lA____Ma_b__________________ referenced,uptodate,lru,active,mmap,anonymous,swapbacked\n total 513968 2007\n\n# ./page-types -r\n flags page-count MB symbolic-flags long-symbolic-flags\n0x0000000000000000 468002 1828 _________________________________\n0x0000000100000000 19102 74 _____________________r___________ reserved\n0x0000000000008000 41 0 _______________H_________________ compound_head\n0x0000000000010000 188 0 ________________T________________ compound_tail\n0x0000000000008014 1 0 __R_D__________H_________________ referenced,dirty,compound_head\n0x0000000000010014 4 0 __R_D___________T________________ referenced,dirty,compound_tail\n0x0000000000000020 1 0 _____l___________________________ lru\n0x0000000800000024 34 0 __R__l__________________P________ referenced,lru,private\n0x0000000000000028 3794 14 ___U_l___________________________ uptodate,lru\n0x0001000000000028 46 0 ___U_l_______________________I___ uptodate,lru,readahead\n0x0000000400000028 44 0 ___U_l_________________d_________ uptodate,lru,mappedtodisk\n0x0001000400000028 2 0 ___U_l_________________d_____I___ uptodate,lru,mappedtodisk,readahead\n0x000000000000002c 6434 25 __RU_l___________________________ referenced,uptodate,lru\n0x000100000000002c 47 0 __RU_l_______________________I___ referenced,uptodate,lru,readahead\n0x000000040000002c 14 0 __RU_l_________________d_________ referenced,uptodate,lru,mappedtodisk\n0x000000080000002c 30 0 __RU_l__________________P________ referenced,uptodate,lru,private\n0x0000000800000040 8124 31 ______A_________________P________ active,private\n0x0000000000000040 219 0 ______A__________________________ active\n0x0000000800000060 1 0 _____lA_________________P________ lru,active,private\n0x0000000000000068 322 1 ___U_lA__________________________ uptodate,lru,active\n0x0001000000000068 12 0 ___U_lA______________________I___ uptodate,lru,active,readahead\n0x0000000400000068 13 0 ___U_lA________________d_________ uptodate,lru,active,mappedtodisk\n0x0000000800000068 12 0 ___U_lA_________________P________ uptodate,lru,active,private\n0x000000000000006c 977 3 __RU_lA__________________________ referenced,uptodate,lru,active\n0x000100000000006c 48 0 __RU_lA______________________I___ referenced,uptodate,lru,active,readahead\n0x000000040000006c 5 0 __RU_lA________________d_________ referenced,uptodate,lru,active,mappedtodisk\n0x000000080000006c 3 0 __RU_lA_________________P________ referenced,uptodate,lru,active,private\n0x0000000c0000006c 3 0 __RU_lA________________dP________ referenced,uptodate,lru,active,mappedtodisk,private\n0x0000000c00000068 1 0 ___U_lA________________dP________ uptodate,lru,active,mappedtodisk,private\n0x0000000000004078 1 0 ___UDlA_______b__________________ uptodate,dirty,lru,active,swapbacked\n0x000000000000407c 34 0 __RUDlA_______b__________________ referenced,uptodate,dirty,lru,active,swapbacked\n0x0000000000000400 538 2 __________B______________________ buddy\n0x0000000000000804 1 0 __R________M_____________________ referenced,mmap\n0x0000000000000828 1029 4 ___U_l_____M_____________________ uptodate,lru,mmap\n0x0001000000000828 43 0 ___U_l_____M_________________I___ uptodate,lru,mmap,readahead\n0x000000000000082c 382 1 __RU_l_____M_____________________ referenced,uptodate,lru,mmap\n0x000100000000082c 12 0 __RU_l_____M_________________I___ referenced,uptodate,lru,mmap,readahead\n0x0000000000000868 192 0 ___U_lA____M_____________________ uptodate,lru,active,mmap\n0x0001000000000868 12 0 ___U_lA____M_________________I___ uptodate,lru,active,mmap,readahead\n0x000000000000086c 800 3 __RU_lA____M_____________________ referenced,uptodate,lru,active,mmap\n0x000100000000086c 31 0 __RU_lA____M_________________I___ referenced,uptodate,lru,active,mmap,readahead\n0x0000000000004878 2 0 ___UDlA____M__b__________________ uptodate,dirty,lru,active,mmap,swapbacked\n0x0000000000001000 492 1 ____________a____________________ anonymous\n0x0000000000005008 2 0 ___U________a_b__________________ uptodate,anonymous,swapbacked\n0x0000000000005808 4 0 ___U_______Ma_b__________________ uptodate,mmap,anonymous,swapbacked\n0x000000000000580c 1 0 __RU_______Ma_b__________________ referenced,uptodate,mmap,anonymous,swapbacked\n0x0000000000005868 2839 11 ___U_lA____Ma_b__________________ uptodate,lru,active,mmap,anonymous,swapbacked\n0x000000000000586c 29 0 __RU_lA____Ma_b__________________ referenced,uptodate,lru,active,mmap,anonymous,swapbacked\n total 513968 2007\n\n# ./page-types --raw --list --no-summary --bits reserved\noffset count flags\n0 15 _____________________r___________\n31 4 _____________________r___________\n159 97 _____________________r___________\n4096 2067 _____________________r___________\n6752 2390 _____________________r___________\n9355 3 _____________________r___________\n9728 14526 _____________________r___________\n\nThis patch:\n\nIntroduce PageHuge(), which identifies huge/gigantic pages by their\ndedicated compound destructor functions.\n\nAlso move prep_compound_gigantic_page() to hugetlb.c and make\n__free_pages_ok() non-static.\n\nSigned-off-by: Wu Fengguang \u003cfengguang.wu@intel.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nCc: Matt Mackall \u003cmpm@selenic.com\u003e\nCc: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a1dd268cf6306565a31a48deff8bf4f6b4b105f7", "tree": "a6d2cfb6647b22f5896813e7f39db8546e921ef2", "parents": [ "72807a74c0172376bba6b5b27702c9f702b526e9" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:32:19 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:36 2009 -0700" }, "message": "mm: use alloc_pages_exact() in alloc_large_system_hash() to avoid duplicated logic\n\nalloc_large_system_hash() has logic for freeing pages at the end of an\nexcessively large power-of-two buffer that is a duplicate of what is in\nalloc_pages_exact(). This patch converts alloc_large_system_hash() to use\nalloc_pages_exact().\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-by: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\u003e\nCc: Christoph Lameter \u003ccl@linux.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "72807a74c0172376bba6b5b27702c9f702b526e9", "tree": "d0f4a4a835754286ec9e2b940e950b2b68a4f61b", "parents": [ "092cead6175bb1b3d3078a34ba71c939d526c70b" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:32:18 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:36 2009 -0700" }, "message": "page allocator: sanity check order in the page allocator slow path\n\nCallers may speculatively call different allocators in order of preference\ntrying to allocate a buffer of a given size. The order needed to allocate\nthis may be larger than what the page allocator can normally handle.\nWhile the allocator mostly does the right thing, it should not direct\nreclaim or wakeup kswapd with a bogus order. This patch sanity checks the\norder in the slow path and returns NULL if it is too large.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Dave Hansen \u003cdave@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": "092cead6175bb1b3d3078a34ba71c939d526c70b", "tree": "84dfeda6c7ca85b6d68710c824e1ce59db16cc3b", "parents": [ "b6e68bc1baed9b6972a250aba66b8c5276cf6fb1" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Tue Jun 16 15:32:17 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:35 2009 -0700" }, "message": "page allocator: move free_page_mlock() to page_alloc.c\n\nCurrently, free_page_mlock() is only called from page_alloc.c. Thus, we\ncan move it to page_alloc.c.\n\nCc: Lee Schermerhorn \u003cLee.Schermerhorn@hp.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nSigned-off-by: 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": "62bc62a873116805774ffd37d7f86aa4faa832b1", "tree": "7f3f5b94b2d484a13ca27b8d3f6f54cfe126d7c0", "parents": [ "974709bdb2a34db378fc84140220f363f558d0d6" ], "author": { "name": "Christoph Lameter", "email": "cl@linux-foundation.org", "time": "Tue Jun 16 15:32:15 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:35 2009 -0700" }, "message": "page allocator: use a pre-calculated value instead of num_online_nodes() in fast paths\n\nnum_online_nodes() is called in a number of places but most often by the\npage allocator when deciding whether the zonelist needs to be filtered\nbased on cpusets or the zonelist cache. This is actually a heavy function\nand touches a number of cache lines.\n\nThis patch stores the number of online nodes at boot time and updates the\nvalue when nodes get onlined and offlined. The value is then used in a\nnumber of important paths in place of num_online_nodes().\n\n[rientjes@google.com: do not override definition of node_set_online() with macro]\nSigned-off-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "974709bdb2a34db378fc84140220f363f558d0d6", "tree": "2b63a089cc077579e3b67efba1995c71102db2e2", "parents": [ "f2260e6b1f4eba0f5b5906795117791b5c660154" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:32:14 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:35 2009 -0700" }, "message": "page allocator: get the pageblock migratetype without disabling interrupts\n\nLocal interrupts are disabled when freeing pages to the PCP list. Part of\nthat free checks what the migratetype of the pageblock the page is in but\nit checks this with interrupts disabled and interupts should never be\ndisabled longer than necessary. This patch checks the pagetype with\ninterrupts enabled with the impact that it is possible a page is freed to\nthe wrong list when a pageblock changes type. As that block is now\nalready considered mixed from an anti-fragmentation perspective, it\u0027s not\nof vital importance.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "f2260e6b1f4eba0f5b5906795117791b5c660154", "tree": "0faa8ce5fb0875835142e6ff3928b2ce076b4874", "parents": [ "418589663d6011de9006425b6c5721e1544fb47a" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:32:13 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:35 2009 -0700" }, "message": "page allocator: update NR_FREE_PAGES only as necessary\n\nWhen pages are being freed to the buddy allocator, the zone NR_FREE_PAGES\ncounter must be updated. In the case of bulk per-cpu page freeing, it\u0027s\nupdated once per page. This retouches cache lines more than necessary.\nUpdate the counters one per per-cpu bulk free.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "418589663d6011de9006425b6c5721e1544fb47a", "tree": "ef37fb026d3e38191d6b5c99bc95c190fa98d0fb", "parents": [ "a3af9c389a7f3e675313f442fdd8c247c1cdb66b" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:32:12 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:35 2009 -0700" }, "message": "page allocator: use allocation flags as an index to the zone watermark\n\nALLOC_WMARK_MIN, ALLOC_WMARK_LOW and ALLOC_WMARK_HIGH determin whether\npages_min, pages_low or pages_high is used as the zone watermark when\nallocating the pages. Two branches in the allocator hotpath determine\nwhich watermark to use.\n\nThis patch uses the flags as an array index into a watermark array that is\nindexed with WMARK_* defines accessed via helpers. All call sites that\nuse zone-\u003epages_* are updated to use the helpers for accessing the values\nand the array offsets for setting.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "a3af9c389a7f3e675313f442fdd8c247c1cdb66b", "tree": "1ff17dc384d3bcfe82d27e3d05a35ff3b859652c", "parents": [ "d395b73428d9748fb70b33477c9b2acae62f360a" ], "author": { "name": "Nick Piggin", "email": "nickpiggin@yahoo.com.au", "time": "Tue Jun 16 15:32:10 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:34 2009 -0700" }, "message": "page allocator: do not check for compound pages during the page allocator sanity checks\n\nA number of sanity checks are made on each page allocation and free\nincluding that the page count is zero. page_count() checks for compound\npages and checks the count of the head page if true. However, in these\npaths, we do not care if the page is compound or not as the count of each\ntail page should also be zero.\n\nThis patch makes two changes to the use of page_count() in the free path.\nIt converts one check of page_count() to a VM_BUG_ON() as the count should\nhave been unconditionally checked earlier in the free path. It also\navoids checking for compound pages.\n\n[mel@csn.ul.ie: Wrote changelog]\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "d395b73428d9748fb70b33477c9b2acae62f360a", "tree": "942bcfe36894ca8e13e6773c4713442a58a44a6d", "parents": [ "da456f14d2f2d7350f2b9440af79c85a34c7eed5" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:32:09 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:34 2009 -0700" }, "message": "page allocator: do not setup zonelist cache when there is only one node\n\nThere is a zonelist cache which is used to track zones that are not in the\nallowed cpuset or found to be recently full. This is to reduce cache\nfootprint on large machines. On smaller machines, it just incurs cost for\nno gain. This patch only uses the zonelist cache when there are NUMA\nnodes.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "da456f14d2f2d7350f2b9440af79c85a34c7eed5", "tree": "fb857a24a561153e25e91a2ad55fa4123f8b152c", "parents": [ "ed0ae21dc5fe3b9ad4cf1c7bb2bfd2ad596c481c" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:32:08 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:34 2009 -0700" }, "message": "page allocator: do not disable interrupts in free_page_mlock()\n\nfree_page_mlock() tests and clears PG_mlocked using locked versions of the\nbit operations. If set, it disables interrupts to update counters and\nthis happens on every page free even though interrupts are disabled very\nshortly afterwards a second time. This is wasteful.\n\nThis patch splits what free_page_mlock() does. The bit check is still\nmade. However, the update of counters is delayed until the interrupts are\ndisabled and the non-lock version for clearing the bit is used. One\npotential weirdness with this split is that the counters do not get\nupdated if the bad_page() check is triggered but a system showing bad\npages is getting screwed already.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nReviewed-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nAcked-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": "ed0ae21dc5fe3b9ad4cf1c7bb2bfd2ad596c481c", "tree": "1ccdf36012a6a8ed22c5a78f7093bae0a259274e", "parents": [ "0ac3a4099b0171ff965836182bc688bb8ca01058" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:32:07 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:34 2009 -0700" }, "message": "page allocator: do not call get_pageblock_migratetype() more than necessary\n\nget_pageblock_migratetype() is potentially called twice for every page\nfree. Once, when being freed to the pcp lists and once when being freed\nback to buddy. When freeing from the pcp lists, it is known what the\npageblock type was at the time of free so use it rather than rechecking.\nIn low memory situations under memory pressure, this might skew\nanti-fragmentation slightly but the interference is minimal and decisions\nthat are fragmenting memory are being made anyway.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "0ac3a4099b0171ff965836182bc688bb8ca01058", "tree": "d216b1adff4b9c9ef99cb5187d22b4a91bc7dca7", "parents": [ "0a15c3e9f649f71464ac39e6378f1fde6f995322" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:32:06 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:34 2009 -0700" }, "message": "page allocator: inline __rmqueue_fallback()\n\n__rmqueue_fallback() is in the slow path but has only one call site.\nBecause there is only one call-site, this function can then be inlined\nwithout causing text bloat. On an x86-based config, it made no difference\nas the savings were padded out by NOP instructions. Milage varies but\ntext will either decrease in size or remain static.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "0a15c3e9f649f71464ac39e6378f1fde6f995322", "tree": "a2a69331347a3fdfa5d2ab6be3e52e71832ae153", "parents": [ "728ec980fb9fa2d65d9e05444079a53615985e7b" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:32:05 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:34 2009 -0700" }, "message": "page allocator: inline buffered_rmqueue()\n\nbuffered_rmqueue() is in the fast path so inline it. Because it only has\none call site, this function can then be inlined without causing text\nbloat. On an x86-based config, it made no difference as the savings were\npadded out by NOP instructions. Milage varies but text will either\ndecrease in size or remain static.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "728ec980fb9fa2d65d9e05444079a53615985e7b", "tree": "d98dca98cd46fc28a871135cc9bd95168e4667b3", "parents": [ "a56f57ff94c25d5d80def06f3ed8fe7f99147762" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:32:04 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:33 2009 -0700" }, "message": "page allocator: inline __rmqueue_smallest()\n\nInline __rmqueue_smallest by altering flow very slightly so that there is\nonly one call site. Because there is only one call-site, this function\ncan then be inlined without causing text bloat. On an x86-based config,\nthis patch reduces text by 16 bytes.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "a56f57ff94c25d5d80def06f3ed8fe7f99147762", "tree": "13cb2626a969e381cb5e3d6ba7f614b9d5ef7a42", "parents": [ "341ce06f69abfafa31b9468410a13dbd60e2b237" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:32:02 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:33 2009 -0700" }, "message": "page allocator: remove a branch by assuming __GFP_HIGH \u003d\u003d ALLOC_HIGH\n\nAllocations that specify __GFP_HIGH get the ALLOC_HIGH flag. If these\nflags are equal to each other, we can eliminate a branch.\n\n[akpm@linux-foundation.org: Suggested the hack]\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "341ce06f69abfafa31b9468410a13dbd60e2b237", "tree": "d7702157c9addb8e67e6dce883650e20b3ddcbfd", "parents": [ "3dd2826698b6902aafd9441ce28ebb44735fd0d6" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Jun 16 15:32:02 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:33 2009 -0700" }, "message": "page allocator: calculate the alloc_flags for allocation only once\n\nFactor out the mapping between GFP and alloc_flags only once. Once\nfactored out, it only needs to be calculated once but some care must be\ntaken.\n\n[neilb@suse.de says]\nAs the test:\n\n- if (((p-\u003eflags \u0026 PF_MEMALLOC) || unlikely(test_thread_flag(TIF_MEMDIE)))\n- \u0026\u0026 !in_interrupt()) {\n- if (!(gfp_mask \u0026 __GFP_NOMEMALLOC)) {\n\nhas been replaced with a slightly weaker one:\n\n+ if (alloc_flags \u0026 ALLOC_NO_WATERMARKS) {\n\nWithout care, this would allow recursion into the allocator via direct\nreclaim. This patch ensures we do not recurse when PF_MEMALLOC is set but\nTF_MEMDIE callers are now allowed to directly reclaim where they would\nhave been prevented in the past.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nAcked-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Neil Brown \u003cneilb@suse.de\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "3dd2826698b6902aafd9441ce28ebb44735fd0d6", "tree": "c9bda4a84a0545d4acf41123072fd018100e63f8", "parents": [ "5117f45d11a9ee62d9b086f1312f3f31781ff155" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:32:00 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:33 2009 -0700" }, "message": "page allocator: calculate the migratetype for allocation only once\n\nGFP mask is converted into a migratetype when deciding which pagelist to\ntake a page from. However, it is happening multiple times per allocation,\nat least once per zone traversed. Calculate it once.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "5117f45d11a9ee62d9b086f1312f3f31781ff155", "tree": "3f7b26f697d14d56be7278bcc4917e4f6d0c2c3d", "parents": [ "49255c619fbd482d704289b5eb2795f8e3b7ff2e" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:31:59 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:33 2009 -0700" }, "message": "page allocator: calculate the preferred zone for allocation only once\n\nget_page_from_freelist() can be called multiple times for an allocation.\nPart of this calculates the preferred_zone which is the first usable zone\nin the zonelist but the zone depends on the GFP flags specified at the\nbeginning of the allocation call. This patch calculates preferred_zone\nonce. It\u0027s safe to do this because if preferred_zone is NULL at the start\nof the call, no amount of direct reclaim or other actions will change the\nfact the allocation will fail.\n\n[akpm@linux-foundation.org: remove (void) casts]\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "49255c619fbd482d704289b5eb2795f8e3b7ff2e", "tree": "b1f36ca46bda7767fce12bc4a70360a68f7255ab", "parents": [ "11e33f6a55ed7847d9c8ffe185ef87faf7806abe" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:31:58 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:33 2009 -0700" }, "message": "page allocator: move check for disabled anti-fragmentation out of fastpath\n\nOn low-memory systems, anti-fragmentation gets disabled as there is\nnothing it can do and it would just incur overhead shuffling pages between\nlists constantly. Currently the check is made in the free page fast path\nfor every page. This patch moves it to a slow path. On machines with low\nmemory, there will be small amount of additional overhead as pages get\nshuffled between lists but it should quickly settle.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "11e33f6a55ed7847d9c8ffe185ef87faf7806abe", "tree": "ca70fe29e836c508cc279c619f7b856380a6f10f", "parents": [ "7f82af9742a9346794ecc1515139daed480e7025" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:31:57 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:32 2009 -0700" }, "message": "page allocator: break up the allocator entry point into fast and slow paths\n\nThe core of the page allocator is one giant function which allocates\nmemory on the stack and makes calculations that may not be needed for\nevery allocation. This patch breaks up the allocator path into fast and\nslow paths for clarity. Note the slow paths are still inlined but the\nentry is marked unlikely. If they were not inlined, it actally increases\ntext size to generate the as there is only one call site.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "7f82af9742a9346794ecc1515139daed480e7025", "tree": "4928b804c990263d1319d32fa61570fa34a25eb6", "parents": [ "6484eb3e2a81807722c5f28efef94d8338b7b996" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:31:56 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:32 2009 -0700" }, "message": "page allocator: check only once if the zonelist is suitable for the allocation\n\nIt is possible with __GFP_THISNODE that no zones are suitable. This patch\nmakes sure the check is only made once.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "b3c466ce512923298ae8c0121d3e9f397a3f1210", "tree": "ca6f360a6dbaaa0a71b9375fb57d544364532254", "parents": [ "d239171e4f6efd58d7e423853056b1b6a74f1446" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:31:53 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:32 2009 -0700" }, "message": "page allocator: do not sanity check order in the fast path\n\nNo user of the allocator API should be passing in an order \u003e\u003d MAX_ORDER\nbut we check for it on each and every allocation. Delete this check and\nmake it a VM_BUG_ON check further down the call path.\n\n[akpm@linux-foundation.org: s/VM_BUG_ON/WARN_ON_ONCE/]\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "d239171e4f6efd58d7e423853056b1b6a74f1446", "tree": "3b0d96abf99e5add7bfc6236f745503b540bd350", "parents": [ "6c0db4664b49417d80988953e69c323721353227" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jun 16 15:31:52 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:32 2009 -0700" }, "message": "page allocator: replace __alloc_pages_internal() with __alloc_pages_nodemask()\n\nThe start of a large patch series to clean up and optimise the page\nallocator.\n\nThe performance improvements are in a wide range depending on the exact\nmachine but the results I\u0027ve seen so fair are approximately;\n\nkernbench:\t0\tto\t 0.12% (elapsed time)\n\t\t0.49%\tto\t 3.20% (sys time)\naim9:\t\t-4%\tto\t30% (for page_test and brk_test)\ntbench:\t\t-1%\tto\t 4%\nhackbench:\t-2.5%\tto\t 3.45% (mostly within the noise though)\nnetperf-udp\t-1.34% to\t 4.06% (varies between machines a bit)\nnetperf-tcp\t-0.44% to\t 5.22% (varies between machines a bit)\n\nI haven\u0027t sysbench figures at hand, but previously they were within the\n-0.5% to 2% range.\n\nOn netperf, the client and server were bound to opposite number CPUs to\nmaximise the problems with cache line bouncing of the struct pages so I\nexpect different people to report different results for netperf depending\non their exact machine and how they ran the test (different machines, same\ncpus client/server, shared cache but two threads client/server, different\nsocket client/server etc).\n\nI also measured the vmlinux sizes for a single x86-based config with\nCONFIG_DEBUG_INFO enabled but not CONFIG_DEBUG_VM. The core of the\n.config is based on the Debian Lenny kernel config so I expect it to be\nreasonably typical.\n\nThis patch:\n\n__alloc_pages_internal is the core page allocator function but essentially\nit is an alias of __alloc_pages_nodemask. Naming a publicly available and\nexported function \"internal\" is also a big ugly. This patch renames\n__alloc_pages_internal() to __alloc_pages_nodemask() and deletes the old\nnodemask function.\n\nWarning - This patch renames an exported symbol. No kernel driver is\naffected by external drivers calling __alloc_pages_internal() should\nchange the call to __alloc_pages_nodemask() without any alteration of\nparameters.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReviewed-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: 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": "6c0db4664b49417d80988953e69c323721353227", "tree": "83ec1fcf3607b06c8c3cc2d39b5d10a61289cdd6", "parents": [ "58568d2a8215cb6f55caf2332017d7bdff954e1c" ], "author": { "name": "Hugh Dickins", "email": "hugh.dickins@tiscali.co.uk", "time": "Tue Jun 16 15:31:50 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:31 2009 -0700" }, "message": "mm: alloc_large_system_hash check order\n\nOn an x86_64 with 4GB ram, tcp_init()\u0027s call to alloc_large_system_hash(),\nto allocate tcp_hashinfo.ehash, is now triggering an mmotm WARN_ON_ONCE on\norder \u003e\u003d MAX_ORDER - it\u0027s hoping for order 11. alloc_large_system_hash()\nhad better make its own check on the order.\n\nSigned-off-by: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\u003e\nCc: David Miller \u003cdavem@davemloft.net\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Eric Dumazet \u003cdada1@cosmosbay.com\u003e\nCc: Christoph Lameter \u003ccl@linux.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "58568d2a8215cb6f55caf2332017d7bdff954e1c", "tree": "ffcdee457494ac78d6550b0aeac86536ca152e7b", "parents": [ "950592f7b991f267d707d372b90f508bbe72acbc" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Tue Jun 16 15:31:49 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:31 2009 -0700" }, "message": "cpuset,mm: update tasks\u0027 mems_allowed in time\n\nFix allocating page cache/slab object on the unallowed node when memory\nspread is set by updating tasks\u0027 mems_allowed after its cpuset\u0027s mems is\nchanged.\n\nIn order to update tasks\u0027 mems_allowed in time, we must modify the code of\nmemory policy. Because the memory policy is applied in the process\u0027s\ncontext originally. After applying this patch, one task directly\nmanipulates anothers mems_allowed, and we use alloc_lock in the\ntask_struct to protect mems_allowed and memory policy of the task.\n\nBut in the fast path, we didn\u0027t use lock to protect them, because adding a\nlock may lead to performance regression. But if we don\u0027t add a lock,the\ntask might see no nodes when changing cpuset\u0027s mems_allowed to some\nnon-overlapping set. In order to avoid it, we set all new allowed nodes,\nthen clear newly disallowed ones.\n\n[lee.schermerhorn@hp.com:\n The rework of mpol_new() to extract the adjusting of the node mask to\n apply cpuset and mpol flags \"context\" breaks set_mempolicy() and mbind()\n with MPOL_PREFERRED and a NULL nodemask--i.e., explicit local\n allocation. Fix this by adding the check for MPOL_PREFERRED and empty\n node mask to mpol_new_mpolicy().\n\n Remove the now unneeded \u0027nodes \u003d NULL\u0027 from mpol_new().\n\n Note that mpol_new_mempolicy() is always called with a non-NULL\n \u0027nodes\u0027 parameter now that it has been removed from mpol_new().\n Therefore, we don\u0027t need to test nodes for NULL before testing it for\n \u0027empty\u0027. However, just to be extra paranoid, add a VM_BUG_ON() to\n verify this assumption.]\n[lee.schermerhorn@hp.com:\n\n I don\u0027t think the function name \u0027mpol_new_mempolicy\u0027 is descriptive\n enough to differentiate it from mpol_new().\n\n This function applies cpuset set context, usually constraining nodes\n to those allowed by the cpuset. However, when the \u0027RELATIVE_NODES flag\n is set, it also translates the nodes. So I settled on\n \u0027mpol_set_nodemask()\u0027, because the comment block for mpol_new() mentions\n that we need to call this function to \"set nodes\".\n\n Some additional minor line length, whitespace and typo cleanup.]\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: David Rientjes \u003crientjes@google.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": "b1eeab67682a5e397aecf172046b3a8bd4808ae4", "tree": "c357b6ac1945dc8beecc2f8c4d84660ad8d35aae", "parents": [ "9b5cab31897e9e89e36c0c2a89b16b93ff1a971a" ], "author": { "name": "Vegard Nossum", "email": "vegard.nossum@gmail.com", "time": "Tue Nov 25 16:55:53 2008 +0100" }, "committer": { "name": "Vegard Nossum", "email": "vegard.nossum@gmail.com", "time": "Mon Jun 15 15:48:33 2009 +0200" }, "message": "kmemcheck: add hooks for the page allocator\n\nThis adds support for tracking the initializedness of memory that\nwas allocated with the page allocator. Highmem requests are not\ntracked.\n\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nAcked-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\n\n[build fix for !CONFIG_KMEMCHECK]\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n\n[rebased for mainline inclusion]\nSigned-off-by: Vegard Nossum \u003cvegard.nossum@gmail.com\u003e\n" }, { "commit": "dbb1f81ca67a56c6cfce4c94d07c76378fd4af9e", "tree": "a3a973f1790713fea944b293bb439c7fe84ea1ab", "parents": [ "89219d37a2377c44fde7bff0bf0623453c05329a" ], "author": { "name": "Catalin Marinas", "email": "catalin.marinas@arm.com", "time": "Thu Jun 11 13:23:19 2009 +0100" }, "committer": { "name": "Catalin Marinas", "email": "catalin.marinas@arm.com", "time": "Thu Jun 11 17:03:30 2009 +0100" }, "message": "kmemleak: Add kmemleak_alloc callback from alloc_large_system_hash\n\nThe alloc_large_system_hash function is called from various places in\nthe kernel and it contains pointers to other allocated structures. It\ntherefore needs to be traced by kmemleak.\n\nSigned-off-by: Catalin Marinas \u003ccatalin.marinas@arm.com\u003e\n" }, { "commit": "888a589f6be07d624e21e2174d98375e9f95911b", "tree": "5c2c210796a114479807f41fc15fe69805d66074", "parents": [ "b286e21868ea1af724a7a4802da2c8e144fa70de" ], "author": { "name": "Yinghai Lu", "email": "yinghai@kernel.org", "time": "Fri May 15 13:59:37 2009 -0700" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon May 18 09:13:31 2009 +0200" }, "message": "mm, x86: remove MEMORY_HOTPLUG_RESERVE related code\n\nafter:\n\n | commit b263295dbffd33b0fbff670720fa178c30e3392a\n | Author: Christoph Lameter \u003cclameter@sgi.com\u003e\n | Date: Wed Jan 30 13:30:47 2008 +0100\n |\n | x86: 64-bit, make sparsemem vmemmap the only memory model\n\nwe don\u0027t have MEMORY_HOTPLUG_RESERVE anymore.\n\nHistorically, x86-64 had an architecture-specific method for memory hotplug\nwhereby it scanned the SRAT for physical memory ranges that could be\npotentially used for memory hot-add later. By reserving those ranges\nwithout physical memory, the memmap would be allocated and left dormant\nuntil needed. This depended on the DISCONTIG memory model which has been\nremoved so the code implementing HOTPLUG_RESERVE is now dead.\n\nThis patch removes the dead code used by MEMORY_HOTPLUG_RESERVE.\n\n(Changelog authored by Mel.)\n\nv2: updated changelog, and remove hotadd\u003d in doc\n\n[ Impact: remove dead code ]\n\nSigned-off-by: Yinghai Lu \u003cyinghai@kernel.org\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nReviewed-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nWorkflow-found-OK-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nLKML-Reference: \u003c4A0C4910.7090508@kernel.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "3a6be87fd1e5cdbbc3b6a14d02a3efa9ecba1d3f", "tree": "bb58ea44178d8a16861d445df8fa3623ddf02d38", "parents": [ "9155203a5de94278525647b16733f0c315f3b786" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Wed May 06 16:03:03 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed May 06 16:36:10 2009 -0700" }, "message": "nommu: clamp zone_batchsize() to 0 under NOMMU conditions\n\nClamp zone_batchsize() to 0 under NOMMU conditions to stop\nfree_hot_cold_page() from queueing and batching frees.\n\nThe problem is that under NOMMU conditions it is really important to be\nable to allocate large contiguous chunks of memory, but when munmap() or\nexit_mmap() releases big stretches of memory, return of these to the buddy\nallocator can be deferred, and when it does finally happen, it can be in\nsmall chunks.\n\nWhilst the fragmentation this incurs isn\u0027t so much of a problem under MMU\nconditions as userspace VM is glued together from individual pages with\nthe aid of the MMU, it is a real problem if there isn\u0027t an MMU.\n\nBy clamping the page freeing queue size to 0, pages are returned to the\nallocator immediately, and the buddy detector is more likely to be able to\nglue them together into large chunks immediately, and fragmentation is\nless likely to occur.\n\nBy disabling batching of frees, and by turning off the trimming of excess\nspace during boot, Coldfire can manage to boot.\n\nReported-by: Lanttor Guo \u003clanttor.guo@freescale.com\u003e\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nTested-by: Lanttor Guo \u003clanttor.guo@freescale.com\u003e\nCc: Greg Ungerer \u003cgerg@snapgear.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" } ], "next": "9155203a5de94278525647b16733f0c315f3b786" }