)]}' { "log": [ { "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" }, { "commit": "9155203a5de94278525647b16733f0c315f3b786", "tree": "68d64b7cf9671c2a725f4f191b3cfb4b37e41f32", "parents": [ "74614f8d9d4141a3752fc1c38706859b63f4842b" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Wed May 06 16:03:02 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed May 06 16:36:10 2009 -0700" }, "message": "mm: use roundown_pow_of_two() in zone_batchsize()\n\nUse roundown_pow_of_two(N) in zone_batchsize() rather than (1 \u003c\u003c\n(fls(N)-1)) as they are equivalent, and with the former it is easier to\nsee what is going on.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nTested-by: Lanttor Guo \u003clanttor.guo@freescale.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "90975ef71246c5c688ead04e8ff6f36dc92d28b3", "tree": "eda44b2efe91509719b0e62219c2efec13a9e762", "parents": [ "cab4e4c43f92582a2bfc026137b3d8a175bd0360", "558f6ab9106e6be701acb0257e7171df1bbccf04" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Apr 05 10:33:07 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Apr 05 10:33:07 2009 -0700" }, "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask: (36 commits)\n cpumask: remove cpumask allocation from idle_balance, fix\n numa, cpumask: move numa_node_id default implementation to topology.h, fix\n cpumask: remove cpumask allocation from idle_balance\n x86: cpumask: x86 mmio-mod.c use cpumask_var_t for downed_cpus\n x86: cpumask: update 32-bit APM not to mug current-\u003ecpus_allowed\n x86: microcode: cleanup\n x86: cpumask: use work_on_cpu in arch/x86/kernel/microcode_core.c\n cpumask: fix CONFIG_CPUMASK_OFFSTACK\u003dy cpu hotunplug crash\n numa, cpumask: move numa_node_id default implementation to topology.h\n cpumask: convert node_to_cpumask_map[] to cpumask_var_t\n cpumask: remove x86 cpumask_t uses.\n cpumask: use cpumask_var_t in uv_flush_tlb_others.\n cpumask: remove cpumask_t assignment from vector_allocation_domain()\n cpumask: make Xen use the new operators.\n cpumask: clean up summit\u0027s send_IPI functions\n cpumask: use new cpumask functions throughout x86\n x86: unify cpu_callin_mask/cpu_callout_mask/cpu_initialized_mask/cpu_sibling_setup_mask\n cpumask: convert struct cpuinfo_x86\u0027s llc_shared_map to cpumask_var_t\n cpumask: convert node_to_cpumask_map[] to cpumask_var_t\n x86: unify 32 and 64-bit node_to_cpumask_map\n ...\n" }, { "commit": "811158b147a503fbdf9773224004ffd32002d1fe", "tree": "0a11dcfefe721bfc38ea9f1f4a238822dbae0dda", "parents": [ "4e76c5ccd5ac9bd003467d3bb0f49b18572dd4cd", "b26e0ed4936b743b693a4cc1413561fa3e4eaf65" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 15:24:35 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 15:24:35 2009 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (28 commits)\n trivial: Update my email address\n trivial: NULL noise: drivers/mtd/tests/mtd_*test.c\n trivial: NULL noise: drivers/media/dvb/frontends/drx397xD_fw.h\n trivial: Fix misspelling of \"Celsius\".\n trivial: remove unused variable \u0027path\u0027 in alloc_file()\n trivial: fix a pdlfush -\u003e pdflush typo in comment\n trivial: jbd header comment typo fix for JBD_PARANOID_IOFAIL\n trivial: wusb: Storage class should be before const qualifier\n trivial: drivers/char/bsr.c: Storage class should be before const qualifier\n trivial: h8300: Storage class should be before const qualifier\n trivial: fix where cgroup documentation is not correctly referred to\n trivial: Give the right path in Documentation example\n trivial: MTD: remove EOL from MODULE_DESCRIPTION\n trivial: Fix typo in bio_split()\u0027s documentation\n trivial: PWM: fix of #endif comment\n trivial: fix typos/grammar errors in Kconfig texts\n trivial: Fix misspelling of firmware\n trivial: cgroups: documentation typo and spelling corrections\n trivial: Update contact info for Jochen Hein\n trivial: fix typo \"resgister\" -\u003e \"register\"\n ...\n" }, { "commit": "327c0e968645f2601a43f5ea7c19c7b3a5fa0a34", "tree": "acc6789c120a6d5000ceebf51e690d14c6cfcacb", "parents": [ "2678958e1225f350806d90f211a3b475f64aee80" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Tue Mar 31 15:23:31 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:15 2009 -0700" }, "message": "vmscan: fix it to take care of nodemask\n\ntry_to_free_pages() is used for the direct reclaim of up to\nSWAP_CLUSTER_MAX pages when watermarks are low. The caller to\nalloc_pages_nodemask() can specify a nodemask of nodes that are allowed to\nbe used but this is not passed to try_to_free_pages(). This can lead to\nunnecessary reclaim of pages that are unusable by the caller and int the\nworst case lead to allocation failure as progress was not been make where\nit is needed.\n\nThis patch passes the nodemask used for alloc_pages_nodemask() to\ntry_to_free_pages().\n\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ee99c71c59f897436ec65debb99372b3146f9985", "tree": "051f1c43b7c7658689d4b2c23b3d8585d6464a89", "parents": [ "a6dc60f8975ad96d162915e07703a4439c80dcf0" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Tue Mar 31 15:19:31 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 08:59:11 2009 -0700" }, "message": "mm: introduce for_each_populated_zone() macro\n\nImpact: cleanup\n\nIn almost cases, for_each_zone() is used with populated_zone(). It\u0027s\nbecause almost function doesn\u0027t need memoryless node information.\nTherefore, for_each_populated_zone() can help to make code simplify.\n\nThis patch has no functional change.\n\n[akpm@linux-foundation.org: small cleanup]\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nReviewed-by: 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": "558f6ab9106e6be701acb0257e7171df1bbccf04", "tree": "6e811633baeb676693c493f6c82bf785cab2771d", "parents": [ "15f7176eb1cccec0a332541285ee752b935c1c85", "65fb0d23fcddd8697c871047b700c78817bdaa43" ], "author": { "name": "Rusty Russell", "email": "rusty@rustcorp.com.au", "time": "Tue Mar 31 13:33:50 2009 +1030" }, "committer": { "name": "Rusty Russell", "email": "rusty@rustcorp.com.au", "time": "Tue Mar 31 13:33:50 2009 +1030" }, "message": "Merge branch \u0027cpumask-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\nConflicts:\n\n\tarch/x86/include/asm/topology.h\n\tdrivers/oprofile/buffer_sync.c\n(Both cases: changed in Linus\u0027 tree, removed in Ingo\u0027s).\n" }, { "commit": "c4e1aa67ed9e4e542a064bc271ddbf152b677e91", "tree": "2a2ca00bed0fc22b4eb83db092c9178868d8f76b", "parents": [ "cf2f7d7c90279cdbc12429de278f3d27ac2050ae", "2f8501815256af8498904e68bd0984b1afffd6f8" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Mar 30 17:17:35 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Mar 30 17:17:35 2009 -0700" }, "message": "Merge branch \u0027locking-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip\n\n* \u0027locking-for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (33 commits)\n lockdep: fix deadlock in lockdep_trace_alloc\n lockdep: annotate reclaim context (__GFP_NOFS), fix SLOB\n lockdep: annotate reclaim context (__GFP_NOFS), fix\n lockdep: build fix for !PROVE_LOCKING\n lockstat: warn about disabled lock debugging\n lockdep: use stringify.h\n lockdep: simplify check_prev_add_irq()\n lockdep: get_user_chars() redo\n lockdep: simplify get_user_chars()\n lockdep: add comments to mark_lock_irq()\n lockdep: remove macro usage from mark_held_locks()\n lockdep: fully reduce mark_lock_irq()\n lockdep: merge the !_READ mark_lock_irq() helpers\n lockdep: merge the _READ mark_lock_irq() helpers\n lockdep: simplify mark_lock_irq() helpers #3\n lockdep: further simplify mark_lock_irq() helpers\n lockdep: simplify the mark_lock_irq() helpers\n lockdep: split up mark_lock_irq()\n lockdep: generate usage strings\n lockdep: generate the state bit definitions\n ...\n" }, { "commit": "e713a21d8251a4c91772f592af46407dfb0b2e4f", "tree": "a1e0140bd094ba94b964a8a8ade9396522079d61", "parents": [ "e3375ac767b847127df57d186a26abf83d055982" ], "author": { "name": "Alexey Zaytsev", "email": "alexey.zaytsev@gmail.com", "time": "Sat Jan 10 02:47:57 2009 +0300" }, "committer": { "name": "Jiri Kosina", "email": "jkosina@suse.cz", "time": "Mon Mar 30 15:21:56 2009 +0200" }, "message": "trivial: Fix dubious bitwise \u0027or\u0027 usage spotted by sparse.\n\nIt doesn\u0027t change the semantics, but it looks like\nthe logical \u0027or\u0027 was meant to be used here.\n\nSigned-off-by: Alexey Zaytsev \u003calexey.zaytsev@gmail.com\u003e\nSigned-off-by: Jiri Kosina \u003cjkosina@suse.cz\u003e\n" }, { "commit": "a70f730282019f487aa33a84e5ac9a5e89c5abd0", "tree": "e6891ec5db5383c6f39617d0cc9671e1a0d1a988", "parents": [ "c69fc56de1df5769f2ec69c915c7ad5afe63804c" ], "author": { "name": "Rusty Russell", "email": "rusty@rustcorp.com.au", "time": "Fri Mar 13 14:49:46 2009 +1030" }, "committer": { "name": "Rusty Russell", "email": "rusty@rustcorp.com.au", "time": "Fri Mar 13 14:49:46 2009 +1030" }, "message": "cpumask: replace node_to_cpumask with cpumask_of_node.\n\nImpact: cleanup\n\nnode_to_cpumask (and the blecherous node_to_cpumask_ptr which\ncontained a declaration) are replaced now everyone implements\ncpumask_of_node.\n\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\n" }, { "commit": "cc2559bccc72767cb446f79b071d96c30c26439b", "tree": "aacdeee5368e0eef72ed1d7a7cbd7e6ee4837941", "parents": [ "f2dbcfa738368c8a40d4a5f0b65dc9879577cb21" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Feb 18 14:48:33 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Feb 18 15:37:55 2009 -0800" }, "message": "mm: fix memmap init for handling memory hole\n\nNow, early_pfn_in_nid(PFN, NID) may returns false if PFN is a hole.\nand memmap initialization was not done. This was a trouble for\nsparc boot.\n\nTo fix this, the PFN should be initialized and marked as PG_reserved.\nThis patch changes early_pfn_in_nid() return true if PFN is a hole.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nReported-by: David Miller \u003cdavem@davemlloft.net\u003e\nTested-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nCc: \u003cstable@kernel.org\u003e\t\t[2.6.25.x, 2.6.26.x, 2.6.27.x, 2.6.28.x]\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f2dbcfa738368c8a40d4a5f0b65dc9879577cb21", "tree": "bdea32c637fa572a9c356cddd202a57530b2a45c", "parents": [ "ada723dcd681e2dffd7d73345cc8fda0eb0df9bd" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Feb 18 14:48:32 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Feb 18 15:37:55 2009 -0800" }, "message": "mm: clean up for early_pfn_to_nid()\n\nWhat\u0027s happening is that the assertion in mm/page_alloc.c:move_freepages()\nis triggering:\n\n\tBUG_ON(page_zone(start_page) !\u003d page_zone(end_page));\n\nOnce I knew this is what was happening, I added some annotations:\n\n\tif (unlikely(page_zone(start_page) !\u003d page_zone(end_page))) {\n\t\tprintk(KERN_ERR \"move_freepages: Bogus zones: \"\n\t\t \"start_page[%p] end_page[%p] zone[%p]\\n\",\n\t\t start_page, end_page, zone);\n\t\tprintk(KERN_ERR \"move_freepages: \"\n\t\t \"start_zone[%p] end_zone[%p]\\n\",\n\t\t page_zone(start_page), page_zone(end_page));\n\t\tprintk(KERN_ERR \"move_freepages: \"\n\t\t \"start_pfn[0x%lx] end_pfn[0x%lx]\\n\",\n\t\t page_to_pfn(start_page), page_to_pfn(end_page));\n\t\tprintk(KERN_ERR \"move_freepages: \"\n\t\t \"start_nid[%d] end_nid[%d]\\n\",\n\t\t page_to_nid(start_page), page_to_nid(end_page));\n ...\n\nAnd here\u0027s what I got:\n\n\tmove_freepages: Bogus zones: start_page[2207d0000] end_page[2207dffc0] zone[fffff8103effcb00]\n\tmove_freepages: start_zone[fffff8103effcb00] end_zone[fffff8003fffeb00]\n\tmove_freepages: start_pfn[0x81f600] end_pfn[0x81f7ff]\n\tmove_freepages: start_nid[1] end_nid[0]\n\nMy memory layout on this box is:\n\n[ 0.000000] Zone PFN ranges:\n[ 0.000000] Normal 0x00000000 -\u003e 0x0081ff5d\n[ 0.000000] Movable zone start PFN for each node\n[ 0.000000] early_node_map[8] active PFN ranges\n[ 0.000000] 0: 0x00000000 -\u003e 0x00020000\n[ 0.000000] 1: 0x00800000 -\u003e 0x0081f7ff\n[ 0.000000] 1: 0x0081f800 -\u003e 0x0081fe50\n[ 0.000000] 1: 0x0081fed1 -\u003e 0x0081fed8\n[ 0.000000] 1: 0x0081feda -\u003e 0x0081fedb\n[ 0.000000] 1: 0x0081fedd -\u003e 0x0081fee5\n[ 0.000000] 1: 0x0081fee7 -\u003e 0x0081ff51\n[ 0.000000] 1: 0x0081ff59 -\u003e 0x0081ff5d\n\nSo it\u0027s a block move in that 0x81f600--\u003e0x81f7ff region which triggers\nthe problem.\n\nThis patch:\n\nDeclaration of early_pfn_to_nid() is scattered over per-arch include\nfiles, and it seems it\u0027s complicated to know when the declaration is used.\n I think it makes fix-for-memmap-init not easy.\n\nThis patch moves all declaration to include/linux/mm.h\n\nAfter this,\n if !CONFIG_NODES_POPULATES_NODE_MAP \u0026\u0026 !CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID\n -\u003e Use static definition in include/linux/mm.h\n else if !CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID\n -\u003e Use generic definition in mm/page_alloc.c\n else\n -\u003e per-arch back end function will be called.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nTested-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nReported-by: David Miller \u003cdavem@davemlloft.net\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nCc: \u003cstable@kernel.org\u003e\t\t[2.6.25.x, 2.6.26.x, 2.6.27.x, 2.6.28.x]\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cf40bd16fdad42c053040bcd3988f5fdedbb6c57", "tree": "d97ab25726981712be806d77650b7f65167cfc88", "parents": [ "6f2b9b9a9d750a9175dc79c74bfed5add840983c" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Wed Jan 21 08:12:39 2009 +0100" }, "committer": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Sat Feb 14 23:27:49 2009 +0100" }, "message": "lockdep: annotate reclaim context (__GFP_NOFS)\n\nHere is another version, with the incremental patch rolled up, and\nadded reclaim context annotation to kswapd, and allocation tracing\nto slab allocators (which may only ever reach the page allocator\nin rare cases, so it is good to put annotations here too).\n\nHaven\u0027t tested this version as such, but it should be getting closer\nto merge worthy ;)\n\n--\nAfter noticing some code in mm/filemap.c accidentally perform a __GFP_FS\nallocation when it should not have been, I thought it might be a good idea to\ntry to catch this kind of thing with lockdep.\n\nI coded up a little idea that seems to work. Unfortunately the system has to\nactually be in __GFP_FS page reclaim, then take the lock, before it will mark\nit. But at least that might still be some orders of magnitude more common\n(and more debuggable) than an actual deadlock condition, so we have some\nimprovement I hope (the concept is no less complete than discovery of a lock\u0027s\ninterrupt contexts).\n\nI guess we could even do the same thing with __GFP_IO (normal reclaim), and\neven GFP_NOIO locks too... but filesystems will have the most locks and fiddly\ncode paths, so let\u0027s start there and see how it goes.\n\nIt *seems* to work. I did a quick test.\n\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\n[ INFO: inconsistent lock state ]\n2.6.28-rc6-00007-ged31348-dirty #26\n---------------------------------\ninconsistent {in-reclaim-W} -\u003e {ov-reclaim-W} usage.\nmodprobe/8526 [HC0[0]:SC0[0]:HE1:SE1] takes:\n (testlock){--..}, at: [\u003cffffffffa0020055\u003e] brd_init+0x55/0x216 [brd]\n{in-reclaim-W} state was registered at:\n [\u003cffffffff80267bdb\u003e] __lock_acquire+0x75b/0x1a60\n [\u003cffffffff80268f71\u003e] lock_acquire+0x91/0xc0\n [\u003cffffffff8070f0e1\u003e] mutex_lock_nested+0xb1/0x310\n [\u003cffffffffa002002b\u003e] brd_init+0x2b/0x216 [brd]\n [\u003cffffffff8020903b\u003e] _stext+0x3b/0x170\n [\u003cffffffff80272ebf\u003e] sys_init_module+0xaf/0x1e0\n [\u003cffffffff8020c3fb\u003e] system_call_fastpath+0x16/0x1b\n [\u003cffffffffffffffff\u003e] 0xffffffffffffffff\nirq event stamp: 3929\nhardirqs last enabled at (3929): [\u003cffffffff8070f2b5\u003e] mutex_lock_nested+0x285/0x310\nhardirqs last disabled at (3928): [\u003cffffffff8070f089\u003e] mutex_lock_nested+0x59/0x310\nsoftirqs last enabled at (3732): [\u003cffffffff8061f623\u003e] sk_filter+0x83/0xe0\nsoftirqs last disabled at (3730): [\u003cffffffff8061f5b6\u003e] sk_filter+0x16/0xe0\n\nother info that might help us debug this:\n1 lock held by modprobe/8526:\n #0: (testlock){--..}, at: [\u003cffffffffa0020055\u003e] brd_init+0x55/0x216 [brd]\n\nstack backtrace:\nPid: 8526, comm: modprobe Not tainted 2.6.28-rc6-00007-ged31348-dirty #26\nCall Trace:\n [\u003cffffffff80265483\u003e] print_usage_bug+0x193/0x1d0\n [\u003cffffffff80266530\u003e] mark_lock+0xaf0/0xca0\n [\u003cffffffff80266735\u003e] mark_held_locks+0x55/0xc0\n [\u003cffffffffa0020000\u003e] ? brd_init+0x0/0x216 [brd]\n [\u003cffffffff802667ca\u003e] trace_reclaim_fs+0x2a/0x60\n [\u003cffffffff80285005\u003e] __alloc_pages_internal+0x475/0x580\n [\u003cffffffff8070f29e\u003e] ? mutex_lock_nested+0x26e/0x310\n [\u003cffffffffa0020000\u003e] ? brd_init+0x0/0x216 [brd]\n [\u003cffffffffa002006a\u003e] brd_init+0x6a/0x216 [brd]\n [\u003cffffffffa0020000\u003e] ? brd_init+0x0/0x216 [brd]\n [\u003cffffffff8020903b\u003e] _stext+0x3b/0x170\n [\u003cffffffff8070f8b9\u003e] ? mutex_unlock+0x9/0x10\n [\u003cffffffff8070f83d\u003e] ? __mutex_unlock_slowpath+0x10d/0x180\n [\u003cffffffff802669ec\u003e] ? trace_hardirqs_on_caller+0x12c/0x190\n [\u003cffffffff80272ebf\u003e] sys_init_module+0xaf/0x1e0\n [\u003cffffffff8020c3fb\u003e] system_call_fastpath+0x16/0x1b\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\n" }, { "commit": "6e9015716ae9b59e9635d692fddfcfb9582c146c", "tree": "e1876d3822c46a20e1c35b41580f5ef6b2f6e053", "parents": [ "f89eb90e33fd4e4e0cc1a6d20afd63c5a561885a" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Wed Jan 07 18:08:15 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:07 2009 -0800" }, "message": "mm: introduce zone_reclaim struct\n\nAdd zone_reclam_stat struct for later enhancement.\n\nA later patch uses this. This patch doesn\u0027t any behavior change (yet).\n\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\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": "9f572e3f96b8a2ef70dcb881e64c7b9c10057d98", "tree": "26accc06afbe7149d2aed6930cc50c5e865d6d28", "parents": [ "901608d9045146aec6f14a7777ea4b1501c379f0" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Tue Jan 06 14:40:29 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:59:10 2009 -0800" }, "message": "mm: remove CONFIG_OUT_OF_LINE_PFN_TO_PAGE\n\nNo architectures use CONFIG_OUT_OF_LINE_PFN_TO_PAGE - it can be removed.\n\nSigned-off-by: 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": "1e9e63650d6cb88e6d6d2ca6cc3ee276c26de4a3", "tree": "2fd95051128ef2ebfaad421ee919dab9e25459b2", "parents": [ "d936cf9b39b06c8d2e0d7fb5e7b4f176e18dec69" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Tue Jan 06 14:40:13 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:59:08 2009 -0800" }, "message": "badpage: KERN_ALERT BUG instead of KERN_EMERG\n\nbad_page() and rmap Eeek messages have said KERN_EMERG for a few years,\nwhich I\u0027ve followed in print_bad_pte(). These are serious system errors,\non a par with BUGs, but they\u0027re not quite emergencies, and we do our best\nto carry on: say KERN_ALERT \"BUG: \" like the x86 oops does.\n\nAnd remove the \"Trying to fix it up, but a reboot is needed\" line: it\u0027s\nnot untrue, but I hope the KERN_ALERT \"BUG: \" conveys as much.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d936cf9b39b06c8d2e0d7fb5e7b4f176e18dec69", "tree": "db691451bc77e90b980b62674519731c6ece72db", "parents": [ "edc315fd222497ae4f4b959a9e31ada1e68a4755" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Tue Jan 06 14:40:12 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:59:07 2009 -0800" }, "message": "badpage: ratelimit print_bad_pte and bad_page\n\nprint_bad_pte() and bad_page() might each need ratelimiting - especially\nfor their dump_stacks, almost never of interest, yet not quite\ndispensible. Correlating corruption across neighbouring entries can be\nvery helpful, so allow a burst of 60 reports before keeping quiet for the\nremainder of that minute (or allow a steady drip of one report per\nsecond).\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "22b31eec63e5f2e219a3ee15f456897272bc73e8", "tree": "906e4975a0e2cdef15ef071b4890e3b28e36cf39", "parents": [ "3dc147414ccad81dc33edb80774b1fed12a38c08" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Tue Jan 06 14:40:09 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:59:07 2009 -0800" }, "message": "badpage: vm_normal_page use print_bad_pte\n\nprint_bad_pte() is so far being called only when zap_pte_range() finds\nnegative page_mapcount, or there\u0027s a fault on a pte_file where it does not\nbelong. That\u0027s weak coverage when we suspect pagetable corruption.\n\nOriginally, it was called when vm_normal_page() found an invalid pfn: but\npfn_valid is expensive on some architectures and configurations, so 2.6.24\nput that under CONFIG_DEBUG_VM (which doesn\u0027t help in the field), then\n2.6.26 replaced it by a VM_BUG_ON (likewise).\n\nReinstate the print_bad_pte() in vm_normal_page(), but use a cheaper test\nthan pfn_valid(): memmap_init_zone() (used in bootup and hotplug) keep a\n__read_mostly note of the highest_memmap_pfn, vm_normal_page() then check\npfn against that. We could call this pfn_plausible() or pfn_sane(), but I\ndoubt we\u0027ll need it elsewhere: of course it\u0027s not reliable, but gives much\nstronger pagetable validation on many boxes.\n\nAlso use print_bad_pte() when the pte_special bit is found outside a\nVM_PFNMAP or VM_MIXEDMAP area, instead of VM_BUG_ON.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3dc147414ccad81dc33edb80774b1fed12a38c08", "tree": "bdcfd37fa47d6617490fa276ddfcc5a6ab0c731b", "parents": [ "8cc3b39221b0ecbd83a338948a8396df097fc656" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Tue Jan 06 14:40:08 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:59:07 2009 -0800" }, "message": "badpage: replace page_remove_rmap Eeek and BUG\n\nNow that bad pages are kept out of circulation, there is no need for the\ninfamous page_remove_rmap() BUG() - once that page is freed, its negative\nmapcount will issue a \"Bad page state\" message and the page won\u0027t be\nfreed. Removing the BUG() allows more info, on subsequent pages, to be\ngathered.\n\nWe do have more info about the page at this point than bad_page() can know\n- notably, what the pmd is, which might pinpoint something like low 64kB\ncorruption - but page_remove_rmap() isn\u0027t given the address to find that.\n\nIn practice, there is only one call to page_remove_rmap() which has ever\nreported anything, that from zap_pte_range() (usually on exit, sometimes\non munmap). It has all the info, so remove page_remove_rmap()\u0027s \"Eeek\"\nmessage and leave it all to zap_pte_range().\n\nmm/memory.c already has a hardly used print_bad_pte() function, showing\nsome of the appropriate info: extend it to show what we want for the rmap\ncase: pte info, page info (when there is a page) and vma info to compare.\nzap_pte_range() already knows the pmd, but print_bad_pte() is easier to\nuse if it works that out for itself.\n\nSome of this info is also shown in bad_page()\u0027s \"Bad page state\" message.\nKeep them separate, but adjust them to match each other as far as\npossible. Say \"Bad page map\" in print_bad_pte(), and add a TAINT_BAD_PAGE\nthere too.\n\nprint_bad_pte() show current-\u003ecomm unconditionally (though it should get\nrepeated in the usually irrelevant stack trace): sorry, I misled Nick\nPiggin to make it conditional on vm_mm \u003d\u003d current-\u003emm, but current-\u003emm is\nalready NULL in the exit case. Usually current-\u003ecomm is good, though\nexceptionally it may not be that of the mm (when \"swapoff\" for example).\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8cc3b39221b0ecbd83a338948a8396df097fc656", "tree": "8a8617590f6bc9842c28a0fc4e5e5fbc93e95780", "parents": [ "79f4b7bf393e67bbffec807cc68caaefc72b82ee" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Tue Jan 06 14:40:06 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:59:07 2009 -0800" }, "message": "badpage: keep any bad page out of circulation\n\nUntil now the bad_page() checkers have special-cased PageReserved, keeping\nthose pages out of circulation thereafter. Now extend the special case to\nall: we want to keep ANY page with bad state out of circulation - the\n\"free\" page may well be in use by something.\n\nLeave the bad state of those pages untouched, for examination by\ndebuggers; except for PageBuddy - leaving that set would risk bringing the\npage back.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "79f4b7bf393e67bbffec807cc68caaefc72b82ee", "tree": "5bee7c12fe49e63e38d74afc6bbd2933906ecb9b", "parents": [ "0f64415d42760379753e6088787ce3fd3e069509" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Tue Jan 06 14:40:05 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:59:07 2009 -0800" }, "message": "badpage: simplify page_alloc flag check+clear\n\nSimplify the PAGE_FLAGS checking and clearing when freeing and allocating\na page: check the same flags as before when freeing, clear ALL the flags\n(unless PageReserved) when freeing, check ALL flags off when allocating.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "efab81864161f8c546d4403873e7ae7831ed5b26", "tree": "e7fa6bff5c86691e4e675c81649acb9d5275af4a", "parents": [ "14b90b22ec0f359ef4791033ab386b2b627bae07" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Tue Jan 06 14:39:46 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:59:05 2009 -0800" }, "message": "mm: make setup_per_zone_inactive_ratio() static\n\nSparse output following warning.\n\nmm/page_alloc.c:4301:6: warning: symbol \u0027setup_per_zone_inactive_ratio\u0027 was not declared. Should it be static?\n\ncleanup here.\n\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\n\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b962716b459505a8d83aea313fea0abe76749f42", "tree": "b401e882f2ee8ff5a11209057496e603c211e8fe", "parents": [ "60371d971a3d01afd102f0bbf2681f32ecc31d78" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Tue Jan 06 14:39:41 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:59:04 2009 -0800" }, "message": "mm: optimize get_scan_ratio for no swap\n\nRik suggests a simplified get_scan_ratio() for !CONFIG_SWAP. Yes, the gcc\noptimizer gives us that, when nr_swap_pages is #defined as 0L. Move usual\ndeclaration to swapfile.c: it never belonged in page_alloc.c.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Robin Holt \u003cholt@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "58a01a45721bf7bd3a41a86248c3cb02a6b0c501", "tree": "2f897de228d8879b981797fdb1ee7d46418e453a", "parents": [ "cbf84b7add8103b92aaa84928e335df726bfc8da" ], "author": { "name": "Julia Lawall", "email": "julia@diku.dk", "time": "Tue Jan 06 14:39:28 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:59:02 2009 -0800" }, "message": "mm/page_alloc.c: eliminate NULL test and memset after alloc_bootmem\n\nAs noted by Akinobu Mita in patch b1fceac2b9e04d278316b2faddf276015fc06e3b,\nalloc_bootmem and related functions never return NULL and always return a\nzeroed region of memory. Thus a NULL test or memset after calls to these\nfunctions is unnecessary.\n\nThis was fixed using the following semantic patch.\n(http://www.emn.fr/x-info/coccinelle/)\n\n// \u003csmpl\u003e\n@@\nexpression E;\nstatement S;\n@@\n\nE \u003d \\(alloc_bootmem\\|alloc_bootmem_low\\|alloc_bootmem_pages\\|alloc_bootmem_low_pages\\|alloc_bootmem_node\\|alloc_bootmem_low_pages_node\\|alloc_bootmem_pages_node\\)(...)\n... when !\u003d E\n(\n- BUG_ON (E \u003d\u003d NULL);\n|\n- if (E \u003d\u003d NULL) S\n)\n\n@@\nexpression E,E1;\n@@\n\nE \u003d \\(alloc_bootmem\\|alloc_bootmem_low\\|alloc_bootmem_pages\\|alloc_bootmem_low_pages\\|alloc_bootmem_node\\|alloc_bootmem_low_pages_node\\|alloc_bootmem_pages_node\\)(...)\n... when !\u003d E\n- memset(E,0,E1);\n// \u003c/smpl\u003e\n\nSigned-off-by: Julia Lawall \u003cjulia@diku.dk\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5594c8c813d9e907ff55da7080d42653478b73e8", "tree": "c10347380fa5e1358d9354ee7e8f3f24b0d18535", "parents": [ "c04fc586c1a480ba198f03ae7b6cbd7b57380b91" ], "author": { "name": "Yinghai Lu", "email": "yinghai@kernel.org", "time": "Tue Jan 06 14:39:14 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:59:00 2009 -0800" }, "message": "mm: print out memmap number only if it is not zero\n\nDon\u0027t print the size of the zone\u0027s memmap array if it does not have one.\n\nImpact: cleanup\n\nSigned-off-by: Yinghai Lu \u003cyinghai@kernel.org\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": "e33c3b5e172e2e45456f42fba47227d48745543f", "tree": "0dc15f10c63b36b12de1dee6b3b70108286a5058", "parents": [ "f0f7e0dc7393268947dc3ed285defc3d375487b9" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Wed Nov 12 13:25:37 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Nov 12 17:17:16 2008 -0800" }, "message": "cpusets: update mems allowed in page allocator\n\nIf all allowable memory is unreclaimable, it is possible to loop forever\nin the page allocator for ~__GFP_NORETRY allocations.\n\nDuring this time, it is also possible for a task\u0027s cpuset to expand its\nset of allowable nodes so that it now includes free memory. The cached\ncopy of this set, current-\u003emems_allowed, is stale, however, since there\nhas not been a subsequent call to cpuset_update_task_memory_state().\n\nThe cached copy of the set of allowable nodes is now updated in the page\nallocator\u0027s slow path so the additional memory is available to\nget_page_from_freelist().\n\n[akpm@linux-foundation.org: add comment]\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\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": "18229df5b613ed0732a766fc37850de2e7988e43", "tree": "ab235f27a5a9d93b8f94773252a1d8f660b9fad1", "parents": [ "69d177c2fc702d402b17fdca2190d5a7e3ca55c5" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Thu Nov 06 12:53:27 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Nov 06 15:41:18 2008 -0800" }, "message": "hugetlb: pull gigantic page initialisation out of the default path\n\nAs we can determine exactly when a gigantic page is in use we can optimise\nthe common regular page cases by pulling out gigantic page initialisation\ninto its own function. As gigantic pages are never released to buddy we\ndo not need a destructor. This effectivly reverts the previous change to\nthe main buddy allocator. It also adds a paranoid check to ensure we\nnever release gigantic pages from hugetlbfs to the main buddy.\n\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nCc: Jon Tollefson \u003ckniht@linux.vnet.ibm.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: \u003cstable@kernel.org\u003e\t\t[2.6.27.x]\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "52d4b9ac0b985168009c2a57098324e67bae171f", "tree": "b3e3b854166930af893be90ea30a7ab0d65c59e7", "parents": [ "c05555b572921c464d064d9267f7f7bc06d424fa" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Sat Oct 18 20:28:16 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 20 08:52:39 2008 -0700" }, "message": "memcg: allocate all page_cgroup at boot\n\nAllocate all page_cgroup at boot and remove page_cgroup poitner from\nstruct page. This patch adds an interface as\n\n struct page_cgroup *lookup_page_cgroup(struct page*)\n\nAll FLATMEM/DISCONTIGMEM/SPARSEMEM and MEMORY_HOTPLUG is supported.\n\nRemove page_cgroup pointer reduces the amount of memory by\n - 4 bytes per PAGE_SIZE.\n - 8 bytes per PAGE_SIZE\nif memory controller is disabled. (even if configured.)\n\nOn usual 8GB x86-32 server, this saves 8MB of NORMAL_ZONE memory.\nOn my x86-64 server with 48GB of memory, this saves 96MB of memory.\nI think this reduction makes sense.\n\nBy pre-allocation, kmalloc/kfree in charge/uncharge are removed.\nThis means\n - we\u0027re not necessary to be afraid of kmalloc faiulre.\n (this can happen because of gfp_mask type.)\n - we can avoid calling kmalloc/kfree.\n - we can avoid allocating tons of small objects which can be fragmented.\n - we can know what amount of memory will be used for this extra-lru handling.\n\nI added printk message as\n\n\t\"allocated %ld bytes of page_cgroup\"\n \"please try cgroup_disable\u003dmemory option if you don\u0027t want\"\n\nmaybe enough informative for users.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nReviewed-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1125b4e3949949b44a7c80b619507c6f61d62911", "tree": "74d1461ce1bb7eec62ce5f020061c4d7c1a4feba", "parents": [ "4b2e38ad703541f7845c2d766426148b8d1aa329" ], "author": { "name": "Gerald Schaefer", "email": "gerald.schaefer@de.ibm.com", "time": "Sat Oct 18 20:27:11 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 20 08:52:32 2008 -0700" }, "message": "setup_per_zone_pages_min(): take zone-\u003elock instead of zone-\u003elru_lock\n\nThis replaces zone-\u003elru_lock in setup_per_zone_pages_min() with zone-\u003elock.\nThere seems to be no need for the lru_lock anymore, but there is a need for\nzone-\u003elock instead, because that function may call move_freepages() via\nsetup_zone_migrate_reserve().\n\nSigned-off-by: Gerald Schaefer \u003cgerald.schaefer@de.ibm.com\u003e\nAcked-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nTested-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d903ef9f38813e7eb268744a7e579e92f411c83a", "tree": "7d9337e6c27fcbc78569757d6dd6399a318174ca", "parents": [ "2a4b3ded5c76fbe373d6415b1b3ad4841f15c9bd" ], "author": { "name": "Yinghai Lu", "email": "yhlu.kernel@gmail.com", "time": "Sat Oct 18 20:27:06 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 20 08:52:32 2008 -0700" }, "message": "mm: print out meminit for memmap\n\nImprove debuggability of memory setup problems.\n\nSigned-off-by: Yinghai Lu \u003cyhlu.kernel@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": "985737cf2ea096ea946aed82c7484d40defc71a8", "tree": "b96dc3b8c28f743857a7a1fff25472d6e0f60120", "parents": [ "af936a1606246a10c145feac3770f6287f483f02" ], "author": { "name": "Lee Schermerhorn", "email": "lee.schermerhorn@hp.com", "time": "Sat Oct 18 20:26:53 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 20 08:52:31 2008 -0700" }, "message": "mlock: count attempts to free mlocked page\n\nAllow free of mlock()ed pages. This shouldn\u0027t happen, but during\ndevelopement, it occasionally did.\n\nThis patch allows us to survive that condition, while keeping the\nstatistics and events correct for debug.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nSigned-off-by: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b291f000393f5a0b679012b39d79fbc85c018233", "tree": "28eb785d4d157d3396e4377294e6054635a4bd90", "parents": [ "89e004ea55abe201b29e2d6e35124101f1288ef7" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Sat Oct 18 20:26:44 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 20 08:52:30 2008 -0700" }, "message": "mlock: mlocked pages are unevictable\n\nMake sure that mlocked pages also live on the unevictable LRU, so kswapd\nwill not scan them over and over again.\n\nThis is achieved through various strategies:\n\n1) add yet another page flag--PG_mlocked--to indicate that\n the page is locked for efficient testing in vmscan and,\n optionally, fault path. This allows early culling of\n unevictable pages, preventing them from getting to\n page_referenced()/try_to_unmap(). Also allows separate\n accounting of mlock\u0027d pages, as Nick\u0027s original patch\n did.\n\n Note: Nick\u0027s original mlock patch used a PG_mlocked\n flag. I had removed this in favor of the PG_unevictable\n flag + an mlock_count [new page struct member]. I\n restored the PG_mlocked flag to eliminate the new\n count field.\n\n2) add the mlock/unevictable infrastructure to mm/mlock.c,\n with internal APIs in mm/internal.h. This is a rework\n of Nick\u0027s original patch to these files, taking into\n account that mlocked pages are now kept on unevictable\n LRU list.\n\n3) update vmscan.c:page_evictable() to check PageMlocked()\n and, if vma passed in, the vm_flags. Note that the vma\n will only be passed in for new pages in the fault path;\n and then only if the \"cull unevictable pages in fault\n path\" patch is included.\n\n4) add try_to_unlock() to rmap.c to walk a page\u0027s rmap and\n ClearPageMlocked() if no other vmas have it mlocked.\n Reuses as much of try_to_unmap() as possible. This\n effectively replaces the use of one of the lru list links\n as an mlock count. If this mechanism let\u0027s pages in mlocked\n vmas leak through w/o PG_mlocked set [I don\u0027t know that it\n does], we should catch them later in try_to_unmap(). One\n hopes this will be rare, as it will be relatively expensive.\n\nOriginal mm/internal.h, mm/rmap.c and mm/mlock.c changes:\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\n\nsplitlru: introduce __get_user_pages():\n\n New munlock processing need to GUP_FLAGS_IGNORE_VMA_PERMISSIONS.\n because current get_user_pages() can\u0027t grab PROT_NONE pages theresore it\n cause PROT_NONE pages can\u0027t munlock.\n\n[akpm@linux-foundation.org: fix this for pagemap-pass-mm-into-pagewalkers.patch]\n[akpm@linux-foundation.org: untangle patch interdependencies]\n[akpm@linux-foundation.org: fix things after out-of-order merging]\n[hugh@veritas.com: fix page-flags mess]\n[lee.schermerhorn@hp.com: fix munlock page table walk - now requires \u0027mm\u0027]\n[kosaki.motohiro@jp.fujitsu.com: build fix]\n[kosaki.motohiro@jp.fujitsu.com: fix truncate race and sevaral comments]\n[kosaki.motohiro@jp.fujitsu.com: splitlru: introduce __get_user_pages()]\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7b854121eb3e5ba0241882ff939e2c485228c9c5", "tree": "e553bc3b3c2be3b36cfcce5219b2ef85646ea495", "parents": [ "bbfd28eee9fbd73e780b19beb3dc562befbb94fa" ], "author": { "name": "Lee Schermerhorn", "email": "Lee.Schermerhorn@hp.com", "time": "Sat Oct 18 20:26:40 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 20 08:50:26 2008 -0700" }, "message": "Unevictable LRU Page Statistics\n\nReport unevictable pages per zone and system wide.\n\nKosaki Motohiro added support for memory controller unevictable\nstatistics.\n\n[riel@redhat.com: fix printk in show_free_areas()]\n[akpm@linux-foundation.org: fix units in /proc/vmstats]\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nSigned-off-by: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nDebugged-by: Hiroshi Shimamoto \u003ch-shimamoto@ct.jp.nec.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "556adecba110bf5f1db6c6b56416cfab5bcab698", "tree": "a721d84d28c4d99a54632b472b452ea3d4b2b137", "parents": [ "4f98a2fee8acdb4ac84545df98cccecfd130f8db" ], "author": { "name": "Rik van Riel", "email": "riel@redhat.com", "time": "Sat Oct 18 20:26:34 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 20 08:50:25 2008 -0700" }, "message": "vmscan: second chance replacement for anonymous pages\n\nWe avoid evicting and scanning anonymous pages for the most part, but\nunder some workloads we can end up with most of memory filled with\nanonymous pages. At that point, we suddenly need to clear the referenced\nbits on all of memory, which can take ages on very large memory systems.\n\nWe can reduce the maximum number of pages that need to be scanned by not\ntaking the referenced state into account when deactivating an anonymous\npage. After all, every anonymous page starts out referenced, so why\ncheck?\n\nIf an anonymous page gets referenced again before it reaches the end of\nthe inactive list, we move it back to the active list.\n\nTo keep the maximum amount of necessary work reasonable, we scale the\nactive to inactive ratio with the size of memory, using the formula\nactive:inactive ratio \u003d sqrt(memory in GB * 10).\n\nKswapd CPU use now seems to scale by the amount of pageout bandwidth,\ninstead of by the amount of memory present in the system.\n\n[kamezawa.hiroyu@jp.fujitsu.com: fix OOM with memcg]\n[kamezawa.hiroyu@jp.fujitsu.com: memcg: lru scan fix]\nSigned-off-by: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4f98a2fee8acdb4ac84545df98cccecfd130f8db", "tree": "035a2937f4c3e2f7b4269412041c073ac646937c", "parents": [ "b2e185384f534781fd22f5ce170b2ad26f97df70" ], "author": { "name": "Rik van Riel", "email": "riel@redhat.com", "time": "Sat Oct 18 20:26:32 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 20 08:50:25 2008 -0700" }, "message": "vmscan: split LRU lists into anon \u0026 file sets\n\nSplit the LRU lists in two, one set for pages that are backed by real file\nsystems (\"file\") and one for pages that are backed by memory and swap\n(\"anon\"). The latter includes tmpfs.\n\nThe advantage of doing this is that the VM will not have to scan over lots\nof anonymous pages (which we generally do not want to swap out), just to\nfind the page cache pages that it should evict.\n\nThis patch has the infrastructure and a basic policy to balance how much\nwe scan the anon lists and how much we scan the file lists. The big\npolicy changes are in separate patches.\n\n[lee.schermerhorn@hp.com: collect lru meminfo statistics from correct offset]\n[kosaki.motohiro@jp.fujitsu.com: prevent incorrect oom under split_lru]\n[kosaki.motohiro@jp.fujitsu.com: fix pagevec_move_tail() doesn\u0027t treat unevictable page]\n[hugh@veritas.com: memcg swapbacked pages active]\n[hugh@veritas.com: splitlru: BDI_CAP_SWAP_BACKED]\n[akpm@linux-foundation.org: fix /proc/vmstat units]\n[nishimura@mxp.nes.nec.co.jp: memcg: fix handling of shmem migration]\n[kosaki.motohiro@jp.fujitsu.com: adjust Quicklists field of /proc/meminfo]\n[kosaki.motohiro@jp.fujitsu.com: fix style issue of get_scan_ratio()]\nSigned-off-by: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: Lee Schermerhorn \u003cLee.Schermerhorn@hp.com\u003e\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b2e185384f534781fd22f5ce170b2ad26f97df70", "tree": "3096b8250302c5a9f71b1b5122345f7cf62606cc", "parents": [ "68a22394c286a2daf06ee8d65d8835f738faefa5" ], "author": { "name": "Rik van Riel", "email": "riel@redhat.com", "time": "Sat Oct 18 20:26:30 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 20 08:50:25 2008 -0700" }, "message": "define page_file_cache() function\n\nDefine page_file_cache() function to answer the question:\n\tis page backed by a file?\n\nOriginally part of Rik van Riel\u0027s split-lru patch. Extracted to make\navailable for other, independent reclaim patches.\n\nMoved inline function to linux/mm_inline.h where it will be needed by\nsubsequent \"split LRU\" and \"noreclaim\" patches.\n\nUnfortunately this needs to use a page flag, since the PG_swapbacked state\nneeds to be preserved all the way to the point where the page is last\nremoved from the LRU. Trying to derive the status from other info in the\npage resulted in wrong VM statistics in earlier split VM patchsets.\n\nThe total number of page flags in use on a 32 bit machine after this patch\nis 19.\n\n[akpm@linux-foundation.org: fix up out-of-order merge fallout]\n[hugh@veritas.com: splitlru: shmem_getpage SetPageSwapBacked sooner[\nSigned-off-by: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nSigned-off-by: MinChan Kim \u003cminchan.kim@gmail.com\u003e\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b69408e88bd86b98feb7b9a38fd865e1ddb29827", "tree": "b19277c29fe624870ba776cc6ada59928cd2796d", "parents": [ "62695a84eb8f2e718bf4dfb21700afaa7a08e0ea" ], "author": { "name": "Christoph Lameter", "email": "cl@linux-foundation.org", "time": "Sat Oct 18 20:26:14 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 20 08:50:25 2008 -0700" }, "message": "vmscan: Use an indexed array for LRU variables\n\nCurrently we are defining explicit variables for the inactive and active\nlist. An indexed array can be more generic and avoid repeating similar\ncode in several places in the reclaim code.\n\nWe are saving a few bytes in terms of code size:\n\nBefore:\n\n text data bss dec hex filename\n4097753 573120 4092484 8763357 85b7dd vmlinux\n\nAfter:\n\n text data bss dec hex filename\n4097729 573120 4092484 8763333 85b7c5 vmlinux\n\nHaving an easy way to add new lru lists may ease future work on the\nreclaim code.\n\nSigned-off-by: Rik van Riel \u003criel@redhat.com\u003e\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nSigned-off-by: Christoph Lameter \u003ccl@linux-foundation.org\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": "db99100d2ed40dd9736fcb1adb3657a98f9bcfd9", "tree": "c098cda0a6172ea9e00fe25d151b87cd1609176c", "parents": [ "9363b9f23c9cc36cc8ef6c05fdf879ee4a96ae92" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Wed Oct 15 22:01:07 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 16 11:21:29 2008 -0700" }, "message": "mm/page_alloc.c:free_area_init_nodes() fix inappropriate use of enum\n\nLocal variable `i\u0027 is a) misleadingly-named for an `enum zone_type\u0027 and b)\nused for indexing zones as well as nodes as well as node_maps.\n\nMake it an `int\u0027.\n\nReported-by: Frans Pop \u003celendil@planet.nl\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": "6babc32c41e3642d875372cb6afbd9ade7a9f311", "tree": "e37e7c5a1d73c5c1f64ec06229cd94b85ccf3b16", "parents": [ "4b19de6d1cb07c8bcb6778e771f9cfd5bcfdfd3e" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Thu Oct 02 14:50:18 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 02 15:53:13 2008 -0700" }, "message": "mm: handle initialising compound pages at orders greater than MAX_ORDER\n\nWhen we initialise a compound page we initialise the page flags and head\npage pointer for all base pages spanned by that page. When we initialise\na gigantic page (a page of order greater than or equal to MAX_ORDER) we\nhave to initialise more than MAX_ORDER_NR_PAGES pages. Currently we\nassume that all elements of the mem_map in this page are contigious in\nmemory. However this is only guarenteed out to MAX_ORDER_NR_PAGES pages,\nand with SPARSEMEM enabled they will not be contigious. This leads us to\nwalk off the end of the first section and scribble on everything which\nfollows, BAD.\n\nWhen we reach a MAX_ORDER_NR_PAGES boundary we much locate the next\nsection of the mem_map. As gigantic pages can only be maximally aligned\nwe know this will occur at exact multiple of MAX_ORDER_NR_PAGES pages from\nthe start of the page.\n\nThis is a bug fix for the gigantic page support in hugetlbfs.\n\nCredit to Mel Gorman for spotting the issue.\n\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Jon Tollefson \u003ckniht@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": "527655835ebac8f58a8f800a10700712a4c2affd", "tree": "ddce45f35b3f89f73cf5a090bc6804ec507f0bb2", "parents": [ "39dbbb4523754df4a822c69191a848a03e556dc7" ], "author": { "name": "Marcin Slusarz", "email": "marcin.slusarz@gmail.com", "time": "Tue Sep 02 14:35:41 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 02 19:21:37 2008 -0700" }, "message": "mm/bootmem: silence section mismatch warning - contig_page_data/bootmem_node_data\n\nWARNING: vmlinux.o(.data+0x1f5c0): Section mismatch in reference from the variable contig_page_data to the variable .init.data:bootmem_node_data\nThe variable contig_page_data references\nthe variable __initdata bootmem_node_data\nIf the reference is valid then annotate the\nvariable with __init* (see linux/init.h) or name the variable:\n*driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console,\n\nSigned-off-by: Marcin Slusarz \u003cmarcin.slusarz@gmail.com\u003e\nCc: Johannes Weiner \u003channes@saeurebad.de\u003e\nCc: Sean MacLennan \u003csmaclennan@pikatech.com\u003e\nCc: Sam Ravnborg \u003csam@ravnborg.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "344c790e3821dac37eb742ddd0b611a300f78b9a", "tree": "af7aad0ef87e320c9bfa84c9f14b32c095c0918c", "parents": [ "169ccbd44eb20f5bb7e4352451eba25397e29749" ], "author": { "name": "Adam Litke", "email": "agl@us.ibm.com", "time": "Tue Sep 02 14:35:38 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 02 19:21:37 2008 -0700" }, "message": "mm: make setup_zone_migrate_reserve() aware of overlapping nodes\n\nI have gotten to the root cause of the hugetlb badness I reported back on\nAugust 15th. My system has the following memory topology (note the\noverlapping node):\n\n Node 0 Memory: 0x8000000-0x44000000\n Node 1 Memory: 0x0-0x8000000 0x44000000-0x80000000\n\nsetup_zone_migrate_reserve() scans the address range 0x0-0x8000000 looking\nfor a pageblock to move onto the MIGRATE_RESERVE list. Finding no\ncandidates, it happily continues the scan into 0x8000000-0x44000000. When\na pageblock is found, the pages are moved to the MIGRATE_RESERVE list on\nthe wrong zone. Oops.\n\nsetup_zone_migrate_reserve() should skip pageblocks in overlapping nodes.\n\nSigned-off-by: Adam Litke \u003cagl@us.ibm.com\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Dave Hansen \u003cdave@linux.vnet.ibm.com\u003e\nCc: Nishanth Aravamudan \u003cnacc@us.ibm.com\u003e\nCc: Andy Whitcroft \u003capw@shadowen.org\u003e\nCc: \u003cstable@kernel.org\u003e\t\t[2.6.25.x, 2.6.26.x]\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "74768ed833344bb0f82b97cee46320a3d7f09ecd", "tree": "eee3404d1dd51eb184eab88e12dbc774dc693522", "parents": [ "866c36637f79506b283a6872a7c313b5ef499985" ], "author": { "name": "Jan Beulich", "email": "jbeulich@novell.com", "time": "Tue Aug 12 15:08:39 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Aug 12 16:07:27 2008 -0700" }, "message": "page allocator: use no-panic variant of alloc_bootmem() in alloc_large_system_hash()\n\n.. since a failed allocation is being (initially) handled gracefully, and\npanic()-ed upon failure explicitly in the function if retries with smaller\nsizes failed.\n\nSigned-off-by: Jan Beulich \u003cjbeulich@novell.com\u003e\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1d1958f05095a7e9ecbba86235122784a3d1b561", "tree": "9c0621d0f689c4711d5de2e770140698366b14aa", "parents": [ "3971e1a917548977cff71418a7c3575ffbc9571f" ], "author": { "name": "Yinghai Lu", "email": "yhlu.kernel@gmail.com", "time": "Tue Jul 29 22:33:16 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Jul 30 09:41:44 2008 -0700" }, "message": "mm: remove find_max_pfn_with_active_regions\n\nIt has no user now\n\nAlso print out info about adding/removing active regions.\n\nSigned-off-by: Yinghai Lu \u003cyhlu.kernel@gmail.com\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-by: 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": "9b1a4d38373a5581a4e01032a3ccdd94cd93477b", "tree": "3d0f0ebd1ac4512551fc35e57d173870eb060c0c", "parents": [ "eeec4fad963490821348a331cca6102ae1c4a7a3" ], "author": { "name": "Rusty Russell", "email": "rusty@rustcorp.com.au", "time": "Mon Jul 28 12:16:30 2008 -0500" }, "committer": { "name": "Rusty Russell", "email": "rusty@rustcorp.com.au", "time": "Mon Jul 28 12:16:31 2008 +1000" }, "message": "stop_machine: Wean existing callers off stop_machine_run()\n\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\n" }, { "commit": "af370fb8cb3031f20438f246798d5f0d98089f29", "tree": "a5b06adeeaeaafb89c7d326ed1daabd0caa364c8", "parents": [ "48c906823f3927b981db9f0b03c2e2499977ee93" ], "author": { "name": "Yasunori Goto", "email": "y-goto@jp.fujitsu.com", "time": "Wed Jul 23 21:28:17 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 24 10:47:21 2008 -0700" }, "message": "memory hotplug: small fixes to bootmem freeing for memory hotremove\n\n- Change some naming\n * Magic -\u003e types\n * MIX_INFO -\u003e MIX_SECTION_INFO\n * Change definition of bootmem type from direct hex value\n\n- __free_pages_bootmem() becomes __meminit.\n\nSigned-off-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: Andy Whitcroft \u003capw@shadowen.org\u003e\nCc: Badari Pulavarty \u003cpbadari@us.ibm.com\u003e\nCc: Yinghai Lu \u003cyhlu.kernel@gmail.com\u003e\nCc: Johannes Weiner \u003channes@saeurebad.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b69a7288ea7bf171328f313f0edae629f50e3bdb", "tree": "20cb483cced19bda14dc4f12bbba6e7c1d01c4a3", "parents": [ "2be0ffe2b29bd31d3debd0877797892ff2d91f4c" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Wed Jul 23 21:28:12 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 24 10:47:20 2008 -0700" }, "message": "mm/page_alloc.c: cleanups\n\nThis patch contains the following cleanups:\n- make the following needlessly global variables static:\n - required_kernelcore\n - zone_movable_pfn[]\n- make the following needlessly global functions static:\n - move_freepages()\n - move_freepages_block()\n - setup_pageset()\n - find_usable_zone_for_movable()\n - adjust_zone_range_for_zone_movable()\n - __absent_pages_in_range()\n - find_min_pfn_for_node()\n - find_zone_movable_pfns_for_nodes()\n\nSigned-off-by: Adrian Bunk \u003cbunk@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": "2be0ffe2b29bd31d3debd0877797892ff2d91f4c", "tree": "7f6e56b3fc5a721296851448e3facf821ef543dd", "parents": [ "3560e249abda6bee41a07a7bf0383a6e193e2839" ], "author": { "name": "Timur Tabi", "email": "timur@freescale.com", "time": "Wed Jul 23 21:28:11 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 24 10:47:20 2008 -0700" }, "message": "mm: add alloc_pages_exact() and free_pages_exact()\n\nalloc_pages_exact() is similar to alloc_pages(), except that it allocates\nthe minimum number of pages to fulfill the request. This is useful if you\nwant to allocate a very large buffer that is slightly larger than an even\npower-of-two number of pages. In that case, alloc_pages() will waste a\nlot of memory.\n\nI have a video driver that wants to allocate a 5MB buffer. alloc_pages()\nwiill waste 3MB of physically-contiguous memory.\n\nSigned-off-by: Timur Tabi \u003ctimur@freescale.com\u003e\nCc: Andi Kleen \u003candi@firstfloor.org\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "01ad1c0827db5b3695c53e296dbb2c1da16a0911", "tree": "80c46c00832094f2413ad97b8e1953018a71cc68", "parents": [ "b54bbf7b81170f03597c17dd0b559e3006bc9868" ], "author": { "name": "Andi Kleen", "email": "ak@suse.de", "time": "Wed Jul 23 21:27:46 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 24 10:47:17 2008 -0700" }, "message": "mm: export prep_compound_page to mm\n\nhugetlb will need to get compound pages from bootmem to handle the case of\nthem being greater than or equal to MAX_ORDER. Export the constructor\nfunction needed for this.\n\nAcked-by: Adam Litke \u003cagl@us.ibm.com\u003e\nSigned-off-by: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9109fb7b3520de187ebc3646c209d66a233f7169", "tree": "f1d64d2efafb8e1652836126523f1b36fb10acd1", "parents": [ "2185e69f680ae8c8496b6fc15e20c889d5b39b67" ], "author": { "name": "Johannes Weiner", "email": "hannes@saeurebad.de", "time": "Wed Jul 23 21:27:20 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 24 10:47:16 2008 -0700" }, "message": "mm: drop unneeded pgdat argument from free_area_init_node()\n\nfree_area_init_node() gets passed in the node id as well as the node\ndescriptor. This is redundant as the function can trivially get the node\ndescriptor itself by means of NODE_DATA() and the node\u0027s id.\n\nI checked all the users and NODE_DATA() seems to be usable everywhere\nfrom where this function is called.\n\nSigned-off-by: Johannes Weiner \u003channes@saeurebad.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3c82d0ce2c4f642b2f24ef98707a030543b06b90", "tree": "bfbb2ee1919bb2bbd0e5158103c7382af73da31d", "parents": [ "42b7772812d15b86543a23b82bd6070eef9a08b1" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Wed Jul 23 21:27:11 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 24 10:47:15 2008 -0700" }, "message": "buddy: clarify comments describing buddy merge\n\nIn __free_one_page(), the comment \"Move the buddy up one level\" appears\nattached to the break and by implication when the break is taken we are\nmoving it up one level:\n\n\tif (!page_is_buddy(page, buddy, order))\n\t\tbreak; /* Move the buddy up one level. */\n\nIn reality the inverse is true, we break out when we can no longer merge\nthis page with its buddy. Looking back into pre-history (into the full\ngit history) it appears that these two lines accidentally got joined as\npart of another change.\n\nMove the comment down where it belongs below the if and clarify its\nlanguage.\n\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e4048e5dc4aecec670f48ed007a28779f09cebd6", "tree": "eb22cb47f1885d8006a85c5142d6e7f9d115de49", "parents": [ "efe9e77997f6e0306fedc6efa98df491dcf5ecb0" ], "author": { "name": "KOSAKI Motohiro", "email": "kosaki.motohiro@jp.fujitsu.com", "time": "Wed Jul 23 21:27:01 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 24 10:47:14 2008 -0700" }, "message": "page allocator: inline some __alloc_pages() wrappers\n\nTwo zonelist patch series rewrote __page_alloc() largely. Now, it is just\na wrapper function. Inlining them will save a function call.\n\n[akpm@linux-foundation.org: export __alloc_pages_internal]\nCc: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\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": "b61bfa3c462671c48a51fb5c31af337c5a996a04", "tree": "020363fd43a85ddde9998759150b428ee794dae6", "parents": [ "8b05c7e6e159d2f33c9275281b8b909a89eb7c5d" ], "author": { "name": "Johannes Weiner", "email": "hannes@saeurebad.de", "time": "Wed Jul 23 21:26:55 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 24 10:47:14 2008 -0700" }, "message": "mm: move bootmem descriptors definition to a single place\n\nThere are a lot of places that define either a single bootmem descriptor or an\narray of them. Use only one central array with MAX_NUMNODES items instead.\n\nSigned-off-by: Johannes Weiner \u003channes@saeurebad.de\u003e\nAcked-by: Ralf Baechle \u003cralf@linux-mips.org\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Richard Henderson \u003crth@twiddle.net\u003e\nCc: Russell King \u003crmk@arm.linux.org.uk\u003e\nCc: Tony Luck \u003ctony.luck@intel.com\u003e\nCc: Hirokazu Takata \u003ctakata@linux-m32r.org\u003e\nCc: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Kyle McMartin \u003ckyle@parisc-linux.org\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: David S. Miller \u003cdavem@davemloft.net\u003e\nCc: Yinghai Lu \u003cyhlu.kernel@gmail.com\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andy Whitcroft \u003capw@shadowen.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "68ad8df42e12037c3894c9706ab428bf5cd6426b", "tree": "42999fc8e3cbf400b6133f832f310690f8f28b76", "parents": [ "2dbb51c49f4fecb8330e43247a0edfbc4b2b8974" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Wed Jul 23 21:26:52 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 24 10:47:14 2008 -0700" }, "message": "mm: print out the zonelists on request for manual verification\n\nThis patch prints out the zonelists during boot for manual verification by the\nuser if the mminit_loglevel is MMINIT_VERIFY or higher.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Andy Whitcroft \u003capw@shadowen.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": "2dbb51c49f4fecb8330e43247a0edfbc4b2b8974", "tree": "507f06335dd1e66144f176e8e863743895e43d79", "parents": [ "708614e6180f398cd307ea0048d48ba6fa274610" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Wed Jul 23 21:26:52 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 24 10:47:13 2008 -0700" }, "message": "mm: make defensive checks around PFN values registered for memory usage\n\nThere are a number of different views to how much memory is currently active.\nThere is the arch-independent zone-sizing view, the bootmem allocator and\nmemory models view.\n\nArchitectures register this information at different times and is not\nnecessarily in sync particularly with respect to some SPARSEMEM limitations.\n\nThis patch introduces mminit_validate_memmodel_limits() which is able to\nvalidate and correct PFN ranges with respect to the memory model. It is only\nSPARSEMEM that currently validates itself.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Andy Whitcroft \u003capw@shadowen.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": "708614e6180f398cd307ea0048d48ba6fa274610", "tree": "8fedf22cf9a2f404e2aef10c5b3858b99880c4c2", "parents": [ "6b74ab97bc12ce74acec900f1d89a4aee2e4d70d" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Wed Jul 23 21:26:51 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 24 10:47:13 2008 -0700" }, "message": "mm: verify the page links and memory model\n\nPrint out information on how the page flags are being used if mminit_loglevel\nis MMINIT_VERIFY or higher and unconditionally performs sanity checks on the\nflags regardless of loglevel.\n\nWhen the page flags are updated with section, node and zone information, a\ncheck are made to ensure the values can be retrieved correctly. Finally we\nconfirm that pfn_to_page and page_to_pfn are the correct inverse functions.\n\n[akpm@linux-foundation.org: fix printk warnings]\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Andy Whitcroft \u003capw@shadowen.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": "6b74ab97bc12ce74acec900f1d89a4aee2e4d70d", "tree": "d9d7b522a4a8f5f605d2e0f7f7a1bcb9d5049a82", "parents": [ "9483a578df27fe7603605d565eefe039c1ba5845" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Wed Jul 23 21:26:49 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 24 10:47:13 2008 -0700" }, "message": "mm: add a basic debugging framework for memory initialisation\n\nBoot initialisation is very complex, with significant numbers of\narchitecture-specific routines, hooks and code ordering. While significant\namounts of the initialisation is architecture-independent, it trusts the data\nreceived from the architecture layer. This is a mistake, and has resulted in\na number of difficult-to-diagnose bugs.\n\nThis patchset adds some validation and tracing to memory initialisation. It\nalso introduces a few basic defensive measures. The validation code can be\nexplicitly disabled for embedded systems.\n\nThis patch:\n\nAdd additional debugging and verification code for memory initialisation.\n\nOnce enabled, the verification checks are always run and when required\nadditional debugging information may be outputted via a mminit_loglevel\u003d\ncommand-line parameter.\n\nThe verification code is placed in a new file mm/mm_init.c. Ideally other mm\ninitialisation code will be moved here over time.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Andy Whitcroft \u003capw@shadowen.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" } ], "next": "1a781a777b2f6ac46523fe92396215762ced624d" }