)]}' { "log": [ { "commit": "aca50bd3b4c4bb5528a1878158ba7abce41de534", "tree": "697c1d89d8d8a75878dc5c5c70aeb14cd72f80fa", "parents": [ "e895bd7992df1ebd1e0c28f7965520482bc83b74" ], "author": { "name": "Hugh Dickins", "email": "hughd@google.com", "time": "Mon Apr 23 11:14:50 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 23 18:19:22 2012 -0700" }, "message": "mm: fix s390 BUG by __set_page_dirty_no_writeback on swap\n\nMel reports a BUG_ON(slot \u003d\u003d NULL) in radix_tree_tag_set() on s390\n3.0.13: called from __set_page_dirty_nobuffers() when page_remove_rmap()\ntries to transfer dirty flag from s390 storage key to struct page and\nradix_tree.\n\nThat would be because of reclaim\u0027s shrink_page_list() calling\nadd_to_swap() on this page at the same time: first PageSwapCache is set\n(causing page_mapping(page) to appear as \u0026swapper_space), then\npage-\u003eprivate set, then tree_lock taken, then page inserted into\nradix_tree - so there\u0027s an interval before taking the lock when the\nradix_tree slot is empty.\n\nWe could fix this by moving __add_to_swap_cache()\u0027s spin_lock_irq up\nbefore the SetPageSwapCache. But a better fix is simply to do what\u0027s\nfive years overdue: Ken Chen introduced __set_page_dirty_no_writeback()\n(if !PageDirty TestSetPageDirty) for tmpfs to skip all the radix_tree\noverhead, and swap is just the same - it ignores the radix_tree tag, and\ndoes not participate in dirty page accounting, so should be using\n__set_page_dirty_no_writeback() too.\n\ns390 testing now confirms that this does indeed fix the problem.\n\nReported-by: Mel Gorman \u003cmgorman@suse.de\u003e\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nAcked-by: Mel Gorman \u003cmgorman@suse.de\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Ken Chen \u003ckenchen@google.com\u003e\nCc: stable@vger.kernel.org\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "67f96aa252e606cdf6c3cf1032952ec207ec0cf0", "tree": "a5a4299dd32789831eda558b51c0120272846664", "parents": [ "c38446cc65e1f2b3eb8630c53943b94c4f65f670" ], "author": { "name": "Rik van Riel", "email": "riel@redhat.com", "time": "Wed Mar 21 16:33:50 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 17:54:56 2012 -0700" }, "message": "mm: make swapin readahead skip over holes\n\nEver since abandoning the virtual scan of processes, for scalability\nreasons, swap space has been a little more fragmented than before. This\ncan lead to the situation where a large memory user is killed, swap space\nends up full of \"holes\" and swapin readahead is totally ineffective.\n\nOn my home system, after killing a leaky firefox it took over an hour to\npage just under 2GB of memory back in, slowing the virtual machines down\nto a crawl.\n\nThis patch makes swapin readahead simply skip over holes, instead of\nstopping at them. This allows the system to swap things back in at rates\nof several MB/second, instead of a few hundred kB/second.\n\nThe checks done in valid_swaphandles are already done in\nread_swap_cache_async as well, allowing us to remove a fair amount of\ncode.\n\n[akpm@linux-foundation.org: fix it for page_cluster \u003e\u003d 32]\nSigned-off-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nCc: KOSAKI Motohiro \u003ckosaki.motohiro@gmail.com\u003e\nAcked-by: Johannes Weiner \u003channes@cmpxchg.org\u003e\nAcked-by: Mel Gorman \u003cmgorman@suse.de\u003e\nCc: Adrian Drzewiecki \u003cz@drze.net\u003e\nCc: Hugh Dickins \u003chughd@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": "7512102cf64d36e3c7444480273623c7aab3563f", "tree": "4c5b589455ed0d343384d7eeaedfab5057648a0d", "parents": [ "9f78ff005a6b6313728247113948450b2adddde8" ], "author": { "name": "Hugh Dickins", "email": "hughd@google.com", "time": "Mon Mar 05 14:59:18 2012 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Mar 05 15:49:43 2012 -0800" }, "message": "memcg: fix GPF when cgroup removal races with last exit\n\nWhen moving tasks from old memcg (with move_charge_at_immigrate on new\nmemcg), followed by removal of old memcg, hit General Protection Fault in\nmem_cgroup_lru_del_list() (called from release_pages called from\nfree_pages_and_swap_cache from tlb_flush_mmu from tlb_finish_mmu from\nexit_mmap from mmput from exit_mm from do_exit).\n\nSomewhat reproducible, takes a few hours: the old struct mem_cgroup has\nbeen freed and poisoned by SLAB_DEBUG, but mem_cgroup_lru_del_list() is\nstill trying to update its stats, and take page off lru before freeing.\n\nA task, or a charge, or a page on lru: each secures a memcg against\nremoval. In this case, the last task has been moved out of the old memcg,\nand it is exiting: anonymous pages are uncharged one by one from the\nmemcg, as they are zapped from its pagetables, so the charge gets down to\n0; but the pages themselves are queued in an mmu_gather for freeing.\n\nMost of those pages will be on lru (and force_empty is careful to\nlru_add_drain_all, to add pages from pagevec to lru first), but not\nnecessarily all: perhaps some have been isolated for page reclaim, perhaps\nsome isolated for other reasons. So, force_empty may find no task, no\ncharge and no page on lru, and let the removal proceed.\n\nThere would still be no problem if these pages were immediately freed; but\ntypically (and the put_page_testzero protocol demands it) they have to be\nadded back to lru before they are found freeable, then removed from lru\nand freed. We don\u0027t see the issue when adding, because the\nmem_cgroup_iter() loops keep their own reference to the memcg being\nscanned; but when it comes to mem_cgroup_lru_del_list().\n\nI believe this was not an issue in v3.2: there, PageCgroupAcctLRU and\nPageCgroupUsed flags were used (like a trick with mirrors) to deflect view\nof pc-\u003emem_cgroup to the stable root_mem_cgroup when neither set.\n38c5d72f3ebe (\"memcg: simplify LRU handling by new rule\") mercifully\nremoved those convolutions, but left this General Protection Fault.\n\nBut it\u0027s surprisingly easy to restore the old behaviour: just check\nPageCgroupUsed in mem_cgroup_lru_add_list() (which decides on which lruvec\nto add), and reset pc to root_mem_cgroup if page is uncharged. A risky\nchange? just going back to how it worked before; testing, and an audit of\nuses of pc-\u003emem_cgroup, show no problem.\n\nAnd there\u0027s a nice bonus: with mem_cgroup_lru_add_list() itself making\nsure that an uncharged page goes to root lru, mem_cgroup_reset_owner() no\nlonger has any purpose, and we can safely revert 4e5f01c2b9b9 (\"memcg:\nclear pc-\u003emem_cgroup if necessary\").\n\nCalling update_page_reclaim_stat() after add_page_to_lru_list() in swap.c\nis not strictly necessary: the lru_lock there, with RCU before memcg\nstructures are freed, makes mem_cgroup_get_reclaim_stat_from_page safe\nwithout that; but it seems cleaner to rely on one dependency less.\n\nSigned-off-by: Hugh Dickins \u003chughd@google.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Konstantin Khlebnikov \u003ckhlebnikov@openvz.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4e5f01c2b9b94321992acb09c35d34f5ee5bb274", "tree": "4e6ac9d29539dc26468fe2630d0e64cd022b1155", "parents": [ "36b62ad539498d00c2d280a151abad5f7630fa73" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Thu Jan 12 17:18:58 2012 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 12 20:13:07 2012 -0800" }, "message": "memcg: clear pc-\u003emem_cgroup if necessary.\n\nThis is a preparation before removing a flag PCG_ACCT_LRU in page_cgroup\nand reducing atomic ops/complexity in memcg LRU handling.\n\nIn some cases, pages are added to lru before charge to memcg and pages\nare not classfied to memory cgroup at lru addtion. Now, the lru where\nthe page should be added is determined a bit in page_cgroup-\u003eflags and\npc-\u003emem_cgroup. I\u0027d like to remove the check of flag.\n\nTo handle the case pc-\u003emem_cgroup may contain stale pointers if pages\nare added to LRU before classification. This patch resets\npc-\u003emem_cgroup to root_mem_cgroup before lru additions.\n\n[akpm@linux-foundation.org: fix CONFIG_CGROUP_MEM_CONT\u003dn build]\n[hughd@google.com: fix CONFIG_CGROUP_MEM_RES_CTLR\u003dy CONFIG_CGROUP_MEM_RES_CTLR_SWAP\u003dn build]\n[akpm@linux-foundation.org: ksm.c needs memcontrol.h, per Michal]\n[hughd@google.com: stop oops in mem_cgroup_reset_owner()]\n[hughd@google.com: fix page migration to reset_owner]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nAcked-by: Michal Hocko \u003cmhocko@suse.cz\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Ying Han \u003cyinghan@google.com\u003e\nSigned-off-by: Hugh Dickins \u003chughd@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": "ff01bb4832651c6d25ac509a06a10fcbd75c461c", "tree": "bbfdebd317db97d346df78293566f36e883b1be9", "parents": [ "94ea4158f1733e3b10cef067d535f504866e0c41" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Sep 16 02:31:11 2011 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue Jan 03 22:54:07 2012 -0500" }, "message": "fs: move code out of buffer.c\n\nMove invalidate_bdev, block_sync_page into fs/block_dev.c. Export\nkill_bdev as well, so brd doesn\u0027t have to open code it. Reduce\nbuffer_head.h requirement accordingly.\n\nRemoved a rather large comment from invalidate_bdev, as it looked a bit\nobsolete to bother moving. The small comment replacing it says enough.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Al Viro \u003cviro@ZenIV.linux.org.uk\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "e25934a51772f47edd94d7b7d08b0e167769639c", "tree": "c72dd84e95178d1e5e5223bf5a736e75430f1305", "parents": [ "9a418455134f5dc23f124d2818b2e8e1cea997a1" ], "author": { "name": "Paul Gortmaker", "email": "paul.gortmaker@windriver.com", "time": "Thu May 26 15:58:15 2011 -0400" }, "committer": { "name": "Paul Gortmaker", "email": "paul.gortmaker@windriver.com", "time": "Mon Oct 31 09:20:11 2011 -0400" }, "message": "mm: delete various needless include \u003clinux/module.h\u003e\n\nThere is nothing modular in these files, and no reason to drag\nin all the 357 headers that module.h brings with it, since\nit just slows down compiles.\n\nSigned-off-by: Paul Gortmaker \u003cpaul.gortmaker@windriver.com\u003e\n" }, { "commit": "7eaceaccab5f40bbfda044629a6298616aeaed50", "tree": "33954d12f63e25a47eb6d86ef3d3d0a5e62bf752", "parents": [ "73c101011926c5832e6e141682180c4debe2cf45" ], "author": { "name": "Jens Axboe", "email": "jaxboe@fusionio.com", "time": "Thu Mar 10 08:52:07 2011 +0100" }, "committer": { "name": "Jens Axboe", "email": "jaxboe@fusionio.com", "time": "Thu Mar 10 08:52:07 2011 +0100" }, "message": "block: remove per-queue plugging\n\nCode has been converted over to the new explicit on-stack plugging,\nand delay users have been converted to use the new API for that.\nSo lets kill off the old plugging along with aops-\u003esync_page().\n\nSigned-off-by: Jens Axboe \u003cjaxboe@fusionio.com\u003e\n" }, { "commit": "3f04f62f90d46a82dd73027c5fd7a15daed5c33d", "tree": "c267f1bdde3f3a7b2a8b52347fa5ad6053cff435", "parents": [ "bae9c19bf12bb2a914a8e530270f41d36cc87c63" ], "author": { "name": "Andrea Arcangeli", "email": "aarcange@redhat.com", "time": "Thu Jan 13 15:46:47 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 17:32:41 2011 -0800" }, "message": "thp: split_huge_page paging\n\nPaging logic that splits the page before it is unmapped and added to swap\nto ensure backwards compatibility with the legacy swap code. Eventually\nswap should natively pageout the hugepages to increase performance and\ndecrease seeking and fragmentation of swap space. swapoff can just skip\nover huge pmd as they cannot be part of swap yet. In add_to_swap be\ncareful to split the page only if we got a valid swap entry so we don\u0027t\nsplit hugepages with a full swap.\n\nIn theory we could split pages before isolating them during the lru scan,\nbut for khugepaged to be safe, I\u0027m relying on either mmap_sem write mode,\nor PG_lock taken, so split_huge_page has to run either with mmap_sem\nread/write mode or PG_lock taken. Calling it from isolate_lru_page would\nmake locking more complicated, in addition to that split_huge_page would\ndeadlock if called by __isolate_lru_page because it has to take the lru\nlock to add the tail pages.\n\nSigned-off-by: Andrea Arcangeli \u003caarcange@redhat.com\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-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": "5a0e3ad6af8660be21ca98a971cd00f331318c05", "tree": "5bfb7be11a03176a87296a43ac6647975c00a1d1", "parents": [ "ed391f4ebf8f701d3566423ce8f17e614cde9806" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Wed Mar 24 17:04:11 2010 +0900" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Mar 30 22:02:32 2010 +0900" }, "message": "include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h\n\npercpu.h is included by sched.h and module.h and thus ends up being\nincluded when building most .c files. percpu.h includes slab.h which\nin turn includes gfp.h making everything defined by the two files\nuniversally available and complicating inclusion dependencies.\n\npercpu.h -\u003e slab.h dependency is about to be removed. Prepare for\nthis change by updating users of gfp and slab facilities include those\nheaders directly instead of assuming availability. As this conversion\nneeds to touch large number of source files, the following script is\nused as the basis of conversion.\n\n http://userweb.kernel.org/~tj/misc/slabh-sweep.py\n\nThe script does the followings.\n\n* Scan files for gfp and slab usages and update includes such that\n only the necessary includes are there. ie. if only gfp is used,\n gfp.h, if slab is used, slab.h.\n\n* When the script inserts a new include, it looks at the include\n blocks and try to put the new include such that its order conforms\n to its surrounding. It\u0027s put in the include block which contains\n core kernel includes, in the same order that the rest are ordered -\n alphabetical, Christmas tree, rev-Xmas-tree or at the end if there\n doesn\u0027t seem to be any matching order.\n\n* If the script can\u0027t find a place to put a new include (mostly\n because the file doesn\u0027t have fitting include block), it prints out\n an error message indicating which .h file needs to be added to the\n file.\n\nThe conversion was done in the following steps.\n\n1. The initial automatic conversion of all .c files updated slightly\n over 4000 files, deleting around 700 includes and adding ~480 gfp.h\n and ~3000 slab.h inclusions. The script emitted errors for ~400\n files.\n\n2. Each error was manually checked. Some didn\u0027t need the inclusion,\n some needed manual addition while adding it to implementation .h or\n embedding .c file was more appropriate for others. This step added\n inclusions to around 150 files.\n\n3. The script was run again and the output was compared to the edits\n from #2 to make sure no file was left behind.\n\n4. Several build tests were done and a couple of problems were fixed.\n e.g. lib/decompress_*.c used malloc/free() wrappers around slab\n APIs requiring slab.h to be added manually.\n\n5. The script was run on all .h files but without automatically\n editing them as sprinkling gfp.h and slab.h inclusions around .h\n files could easily lead to inclusion dependency hell. Most gfp.h\n inclusion directives were ignored as stuff from gfp.h was usually\n wildly available and often used in preprocessor macros. Each\n slab.h inclusion directive was examined and added manually as\n necessary.\n\n6. percpu.h was updated not to include slab.h.\n\n7. Build test were done on the following configurations and failures\n were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my\n distributed build env didn\u0027t work with gcov compiles) and a few\n more options had to be turned off depending on archs to make things\n build (like ipr on powerpc/64 which failed due to missing writeq).\n\n * x86 and x86_64 UP and SMP allmodconfig and a custom test config.\n * powerpc and powerpc64 SMP allmodconfig\n * sparc and sparc64 SMP allmodconfig\n * ia64 SMP allmodconfig\n * s390 SMP allmodconfig\n * alpha SMP allmodconfig\n * um on x86_64 SMP allmodconfig\n\n8. percpu.h modifications were reverted so that it could be applied as\n a separate patch and serve as bisection point.\n\nGiven the fact that I had only a couple of failures from tests on step\n6, I\u0027m fairly confident about the coverage of this conversion patch.\nIf there is a breakage, it\u0027s likely to be something in one of the arch\nheaders which should be easily discoverable easily on most builds of\nthe specific arch.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nGuess-its-ok-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: Lee Schermerhorn \u003cLee.Schermerhorn@hp.com\u003e\n" }, { "commit": "2ca4532a49be92d7b2766c3244b30fa8bfb0114d", "tree": "1dc838cebacb10317dff78ceccd50b97e24c4f7f", "parents": [ "31a5639623a487d6db996c8138c9e53fef2e2d91" ], "author": { "name": "Daisuke Nishimura", "email": "nishimura@mxp.nes.nec.co.jp", "time": "Mon Sep 21 17:02:52 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:35 2009 -0700" }, "message": "mm: add_to_swap_cache() does not return -EEXIST\n\nAfter commit 355cfa73 (\"mm: modify swap_map and add SWAP_HAS_CACHE flag\"),\nonly the context which have set SWAP_HAS_CACHE flag by swapcache_prepare()\nor get_swap_page() would call add_to_swap_cache(). So add_to_swap_cache()\ndoesn\u0027t return -EEXIST any more.\n\nEven though it doesn\u0027t return -EEXIST, it\u0027s not good behavior conceptually\nto call swapcache_prepare() in the -EEXIST case, because it means clearing\nSWAP_HAS_CACHE flag while the entry is on swap cache.\n\nThis patch removes redundant codes and comments from callers of it, and\nadds VM_BUG_ON() in error path of add_to_swap_cache() and some comments.\n\nSigned-off-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nReviewed-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\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": "31a5639623a487d6db996c8138c9e53fef2e2d91", "tree": "4fff22b4a0333df084a6cd89e8ecbc332dbfa299", "parents": [ "8fbb398f5c78832ee61e0d5ed0793fa8857bd853" ], "author": { "name": "Daisuke Nishimura", "email": "nishimura@mxp.nes.nec.co.jp", "time": "Mon Sep 21 17:02:50 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:35 2009 -0700" }, "message": "mm: add_to_swap_cache() must not sleep\n\nAfter commit 355cfa73 (\"mm: modify swap_map and add SWAP_HAS_CACHE flag\"),\nread_swap_cache_async() will busy-wait while a entry doesn\u0027t exist in swap\ncache but it has SWAP_HAS_CACHE flag.\n\nSuch entries can exist on add/delete path of swap cache. On add path,\nadd_to_swap_cache() is called soon after SWAP_HAS_CACHE flag is set, and\non delete path, swapcache_free() will be called (SWAP_HAS_CACHE flag is\ncleared) soon after __delete_from_swap_cache() is called. So, the\nbusy-wait works well in most cases.\n\nBut this mechanism can cause soft lockup if add_to_swap_cache() sleeps and\nread_swap_cache_async() tries to swap-in the same entry on the same cpu.\n\nThis patch calls radix_tree_preload() before swapcache_prepare() and\ndivides add_to_swap_cache() into two part: radix_tree_preload() part and\nradix_tree_insert() part(define it as __add_to_swap_cache()).\n\nSigned-off-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\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": "d993831fa7ffeb89e994f046f93eeb09ec91df08", "tree": "da4f94bbf022c83988bda71adf1f1b3a88cb4592", "parents": [ "f09b00d3e789a88fa6c7c03cedc62cb65c1de0cb" ], "author": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Fri Jun 12 14:45:52 2009 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Fri Sep 11 09:20:26 2009 +0200" }, "message": "writeback: add name to backing_dev_info\n\nThis enables us to track who does what and print info. Its main use\nis catching dirty inodes on the default_backing_dev_info, so we can\nfix that up.\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "aca8bf323edd31ad462dc98c107c23a5c6022ca2", "tree": "1466785c7ab056d6a9e21bb61fbd36ce3c3df5cc", "parents": [ "8192da6a8811ab6c3d29dc590a5f94a377c43739" ], "author": { "name": "Minchan Kim", "email": "minchan.kim@gmail.com", "time": "Tue Jun 16 15:33:02 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:44 2009 -0700" }, "message": "mm: remove file argument from swap_readpage()\n\nThe file argument resulted from address_space\u0027s readpage long time ago.\n\nWe don\u0027t use it any more. Let\u0027s remove unnecessary argement.\n\nSigned-off-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nAcked-by: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\u003e\nReviewed-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": "8192da6a8811ab6c3d29dc590a5f94a377c43739", "tree": "1801978858a01688af7ee65a7e2b9ff613f5be19", "parents": [ "73d60b7f747176dbdff826c4127d22e1fd3f9f74" ], "author": { "name": "Minchan Kim", "email": "minchan.kim@gmail.com", "time": "Tue Jun 16 15:33:01 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:43 2009 -0700" }, "message": "mm: remove annotation of gfp_mask in add_to_swap\n\nHugh removed add_to_swap\u0027s gfp_mask argument. (mm: remove gfp_mask from\nadd_to_swap) So we have to remove annotation of gfp_mask of the function.\n\nSigned-off-by: Minchan Kim \u003cminchan.kim@gmail.com\u003e\nAcked-by: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "355cfa73ddff2fb8fa14e93bd94a057cc022512e", "tree": "7ff70cd56d533070d50b06db6ba0086e8aab0d71", "parents": [ "cb4b86ba47bb0937b71fb825b3ed88adf7a190f0" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Tue Jun 16 15:32:53 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:42 2009 -0700" }, "message": "mm: modify swap_map and add SWAP_HAS_CACHE flag\n\nThis is a part of the patches for fixing memcg\u0027s swap accountinf leak.\nBut, IMHO, not a bad patch even if no memcg.\n\nThere are 2 kinds of references to swap.\n - reference from swap entry\n - reference from swap cache\n\nThen,\n\n - If there is swap cache \u0026\u0026 swap\u0027s refcnt is 1, there is only swap cache.\n (*) swapcount(entry) \u003d\u003d 1 \u0026\u0026 find_get_page(swapper_space, entry) !\u003d NULL\n\nThis counting logic have worked well for a long time. But considering\nthat we cannot know there is a _real_ reference or not by swap_map[],\ncurrent usage of counter is not very good.\n\nThis patch adds a flag SWAP_HAS_CACHE and recored information that a swap\nentry has a cache or not. This will remove -1 magic used in swapfile.c\nand be a help to avoid unnecessary find_get_page().\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nTested-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Dhaval Giani \u003cdhaval@linux.vnet.ibm.com\u003e\nCc: YAMAMOTO Takashi \u003cyamamoto@valinux.co.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cb4b86ba47bb0937b71fb825b3ed88adf7a190f0", "tree": "4b8528ba914a315e5857e7fe2a6e7d415f2e6650", "parents": [ "6837765963f1723e80ca97b1fae660f3a60d77df" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Tue Jun 16 15:32:52 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 16 19:47:42 2009 -0700" }, "message": "mm: add swap cache interface for swap reference\n\nIn a following patch, the usage of swap cache is recorded into swap_map.\nThis patch is for necessary interface changes to do that.\n\n2 interfaces:\n\n - swapcache_prepare()\n - swapcache_free()\n\nare added for allocating/freeing refcnt from swap-cache to existing swap\nentries. But implementation itself is not changed under this patch. At\nadding swapcache_free(), memcg\u0027s hook code is moved under\nswapcache_free(). This is better than using scattered hooks.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nReviewed-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nAcked-by: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Hugh Dickins \u003chugh.dickins@tiscali.co.uk\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Dhaval Giani \u003cdhaval@linux.vnet.ibm.com\u003e\nCc: YAMAMOTO Takashi \u003cyamamoto@valinux.co.jp\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e767e0561d7fd2333df1921f1ab4176211f9036b", "tree": "3b936733f80ceb1ee61ce99f927d002d2296250e", "parents": [ "bd6daba909d8484bd2ccf6017db4028d7a420927" ], "author": { "name": "Daisuke Nishimura", "email": "nishimura@mxp.nes.nec.co.jp", "time": "Thu May 28 14:34:28 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri May 29 08:40:02 2009 -0700" }, "message": "memcg: fix deadlock between lock_page_cgroup and mapping tree_lock\n\nmapping-\u003etree_lock can be acquired from interrupt context. Then,\nfollowing dead lock can occur.\n\nAssume \"A\" as a page.\n\n CPU0:\n lock_page_cgroup(A)\n\t\tinterrupted\n\t\t\t-\u003e take mapping-\u003etree_lock.\n CPU1:\n take mapping-\u003etree_lock\n\t\t-\u003e lock_page_cgroup(A)\n\nThis patch tries to fix above deadlock by moving memcg\u0027s hook to out of\nmapping-\u003etree_lock. charge/uncharge of pagecache/swapcache is protected\nby page lock, not tree_lock.\n\nAfter this patch, lock_page_cgroup() is not called under mapping-\u003etree_lock.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nCc: Balbir Singh \u003cbalbir@in.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": "8c7c6e34a1256a5082d38c8e9bd1474476912715", "tree": "09f53c7c4bac5532a9ecbdadb4450702c744ea6f", "parents": [ "27a7faa0779dd13729196c1a818c294f44bbd1ee" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Jan 07 18:08:00 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:05 2009 -0800" }, "message": "memcg: mem+swap controller core\n\nThis patch implements per cgroup limit for usage of memory+swap. However\nthere are SwapCache, double counting of swap-cache and swap-entry is\navoided.\n\nMem+Swap controller works as following.\n - memory usage is limited by memory.limit_in_bytes.\n - memory + swap usage is limited by memory.memsw_limit_in_bytes.\n\nThis has following benefits.\n - A user can limit total resource usage of mem+swap.\n\n Without this, because memory resource controller doesn\u0027t take care of\n usage of swap, a process can exhaust all the swap (by memory leak.)\n We can avoid this case.\n\n And Swap is shared resource but it cannot be reclaimed (goes back to memory)\n until it\u0027s used. This characteristic can be trouble when the memory\n is divided into some parts by cpuset or memcg.\n Assume group A and group B.\n After some application executes, the system can be..\n\n Group A -- very large free memory space but occupy 99% of swap.\n Group B -- under memory shortage but cannot use swap...it\u0027s nearly full.\n\n Ability to set appropriate swap limit for each group is required.\n\nMaybe someone wonder \"why not swap but mem+swap ?\"\n\n - The global LRU(kswapd) can swap out arbitrary pages. Swap-out means\n to move account from memory to swap...there is no change in usage of\n mem+swap.\n\n In other words, when we want to limit the usage of swap without affecting\n global LRU, mem+swap limit is better than just limiting swap.\n\nAccounting target information is stored in swap_cgroup which is\nper swap entry record.\n\nCharge is done as following.\n map\n - charge page and memsw.\n\n unmap\n - uncharge page/memsw if not SwapCache.\n\n swap-out (__delete_from_swap_cache)\n - uncharge page\n - record mem_cgroup information to swap_cgroup.\n\n swap-in (do_swap_page)\n - charged as page and memsw.\n record in swap_cgroup is cleared.\n memsw accounting is decremented.\n\n swap-free (swap_free())\n - if swap entry is freed, memsw is uncharged by PAGE_SIZE.\n\nThere are people work under never-swap environments and consider swap as\nsomething bad. For such people, this mem+swap controller extension is just an\noverhead. This overhead is avoided by config or boot option.\n(see Kconfig. detail is not in this patch.)\n\nTODO:\n - maybe more optimization can be don in swap-in path. (but not very safe.)\n But we just do simple accounting at this stage.\n\n[nishimura@mxp.nes.nec.co.jp: make resize limit hold mutex]\n[hugh@veritas.com: memswap controller core swapcache fixes]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nSigned-off-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\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": "d13d144309d2e5a3e6ad978b16c1d0226ddc9231", "tree": "37c19902b527823956db969d9428737081b2a94d", "parents": [ "c1e862c1f5ad34771b6d0a528cf681e0dcad7c86" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Wed Jan 07 18:07:56 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 08 08:31:05 2009 -0800" }, "message": "memcg: handle swap caches\n\nSwapCache support for memory resource controller (memcg)\n\nBefore mem+swap controller, memcg itself should handle SwapCache in proper\nway. This is cut-out from it.\n\nIn current memcg, SwapCache is just leaked and the user can create tons of\nSwapCache. This is a leak of account and should be handled.\n\nSwapCache accounting is done as following.\n\n charge (anon)\n\t- charged when it\u0027s mapped.\n\t (because of readahead, charge at add_to_swap_cache() is not sane)\n uncharge (anon)\n\t- uncharged when it\u0027s dropped from swapcache and fully unmapped.\n\t means it\u0027s not uncharged at unmap.\n\t Note: delete from swap cache at swap-in is done after rmap information\n\t is established.\n charge (shmem)\n\t- charged at swap-in. this prevents charge at add_to_page_cache().\n\n uncharge (shmem)\n\t- uncharged when it\u0027s dropped from swapcache and not on shmem\u0027s\n\t radix-tree.\n\n at migration, check against \u0027old page\u0027 is modified to handle shmem.\n\nComparing to the old version discussed (and caused troubles), we have\nadvantages of\n - PCG_USED bit.\n - simple migrating handling.\n\nSo, situation is much easier than several months ago, maybe.\n\n[hugh@veritas.com: memcg: handle swap caches build fix]\nReviewed-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nTested-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Pavel Emelyanov \u003cxemul@openvz.org\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": "ac47b003d03c2a4f28aef1d505b66d24ad191c4f", "tree": "12c31491b756f4dc7a55a9e11b69b193743ff647", "parents": [ "63d6c5ad7fc27455ce5cb4706884671fb7e0df08" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Tue Jan 06 14:39:39 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:59:04 2009 -0800" }, "message": "mm: remove gfp_mask from add_to_swap\n\nRemove gfp_mask argument from add_to_swap(): it\u0027s misleading because its\nonly caller, shrink_page_list(), is not atomic at that point; and in due\ncourse (implementing discard) we\u0027ll sometimes want to allocate some memory\nwith GFP_NOIO (as is used in swap_writepage) when allocating swap.\n\nNo change to the gfp_mask passed down to add_to_swap_cache(): still use\n__GFP_HIGH without __GFP_WAIT (with nomemalloc and nowarn as before):\nthough it\u0027s not obvious if that\u0027s the best combination to ask for here.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: 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": "a2c43eed8334e878702fca713b212ae2a11d84b9", "tree": "4eb3f9b9153df5e7a638b15a6f7c9aa924066a94", "parents": [ "7b1fe59793e61f826bef053107b57b23954833bb" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Tue Jan 06 14:39:36 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:59:03 2009 -0800" }, "message": "mm: try_to_free_swap replaces remove_exclusive_swap_page\n\nremove_exclusive_swap_page(): its problem is in living up to its name.\n\nIt doesn\u0027t matter if someone else has a reference to the page (raised\npage_count); it doesn\u0027t matter if the page is mapped into userspace\n(raised page_mapcount - though that hints it may be worth keeping the\nswap): all that matters is that there be no more references to the swap\n(and no writeback in progress).\n\nswapoff (try_to_unuse) has been removing pages from swapcache for years,\nwith no concern for page count or page mapcount, and we used to have a\ncomment in lookup_swap_cache() recognizing that: if you go for a page of\nswapcache, you\u0027ll get the right page, but it could have been removed from\nswapcache by the time you get page lock.\n\nSo, give up asking for exclusivity: get rid of\nremove_exclusive_swap_page(), and remove_exclusive_swap_page_ref() and\nremove_exclusive_swap_page_count() which were spawned for the recent LRU\nwork: replace them by the simpler try_to_free_swap() which just checks\npage_swapcount().\n\nSimilarly, remove the page_count limitation from free_swap_and_count(),\nbut assume that it\u0027s worth holding on to the swap if page is mapped and\nswap nowhere near full. Add a vm_swap_full() test in free_swap_cache()?\nIt would be consistent, but I think we probably have enough for now.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: 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": "51726b1222863852c46ca21ed0115b85d1edfd89", "tree": "fb9d4de47a1ee860003bc4aa7c46651a77ae7b83", "parents": [ "6d91add09f4bad5f4d4233b13faa392f0c4b16be" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Tue Jan 06 14:39:25 2009 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jan 06 15:59:02 2009 -0800" }, "message": "mm: replace some BUG_ONs by VM_BUG_ONs\n\nThe swap code is over-provisioned with BUG_ONs on assorted page flags,\nmostly dating back to 2.3. They\u0027re good documentation, and guard against\ndeveloper error, but a waste of space on most systems: change them to\nVM_BUG_ONs, conditional on CONFIG_DEBUG_VM. Just delete the PagePrivate\nones: they\u0027re later, from 2.5.69, but even less interesting now.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nReviewed-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\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": "f45840b5c128445da70e7ec33adc47b4a12bdaf4", "tree": "3815a03d12d1c69d71a48c44cd216c3e1e84272a", "parents": [ "9978ad583e100945b74e4f33e73317983ea32df9" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Sat Oct 18 20:26:57 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 20 08:52:31 2008 -0700" }, "message": "mm: pagecache insertion fewer atomics\n\nSetting and clearing the page locked when inserting it into swapcache /\npagecache when it has no other references can use non-atomic page flags\noperations because no other CPU may be operating on it at this time.\n\nThis saves one atomic operation when inserting a page into pagecache.\n\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": "c5fdae469a6a26cd882d7fe0aa3fbfffb6b72fc5", "tree": "68eff4073f0e26be5aea7a6e69f210fb0cab02ea", "parents": [ "7e9cd484204f9e5b316ed35b241abf088d76e0af" ], "author": { "name": "Rik van Riel", "email": "riel@redhat.com", "time": "Sat Oct 18 20:26:36 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 20 08:50:25 2008 -0700" }, "message": "vmscan: add newly swapped in pages to the inactive list\n\nSwapin_readahead can read in a lot of data that the processes in memory\nnever need. Adding swap cache pages to the inactive list prevents them\nfrom putting too much pressure on the working set.\n\nThis has the potential to help the programs that are already in memory,\nbut it could also be a disadvantage to processes that are trying to get\nswapped in.\n\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": "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": "07279cdfd964acc032de92a527cb11b1f40f35aa", "tree": "e1f1269b459790e45ae11057fcd5b530bcbe5fd5", "parents": [ "16f8c5b2e64dec7faa5d3c7e9bdf0765e864e481" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Wed Aug 20 14:09:05 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Aug 20 15:40:30 2008 -0700" }, "message": "mm: show free swap as signed\n\nAdjust \u003cAlt\u003e\u003cSysRq\u003em show_swap_cache_info() to show \"Free swap\" as a\nsigned long: the signed format is preferable, because during swapoff\nnr_swap_pages can legitimately go negative, so makes more sense thus\n(it used to be shown redundantly, once as signed and once as unsigned).\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nReviewed-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "529ae9aaa08378cfe2a4350bded76f32cc8ff0ce", "tree": "d3ae998f9876c72a83a022805103a92111852b21", "parents": [ "e9ba9698187ddbc0c5bfcf41de0349a662d23d02" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Sat Aug 02 12:01:03 2008 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Aug 04 21:31:34 2008 -0700" }, "message": "mm: rename page trylock\n\nConverting page lock to new locking bitops requires a change of page flag\noperation naming, so we might as well convert it to something nicer\n(!TestSetPageLocked_Lock \u003d\u003e trylock_page, SetPageLocked \u003d\u003e set_page_locked).\n\nThis also facilitates lockdeping of page lock.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nAcked-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nAcked-by: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nAcked-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nAcked-by: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2c97b7fc0d8c8661981beb9517da342ced3b3bc7", "tree": "c1cc4bd6a13624f38a7e2c7ea242efdb79193696", "parents": [ "ebcb67341fee34061430f3367f2e507e52ee051b" ], "author": { "name": "Johannes Weiner", "email": "hannes@saeurebad.de", "time": "Fri Jul 25 19:46:01 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Jul 26 12:00:10 2008 -0700" }, "message": "mm: print swapcache page count in show_swap_cache_info()\n\nEvery arch implements its own show_mem() function. Most of them share\nquite some code, some of them are completely identical.\n\nThis series implements a generic version of this function and migrates\nalmost all architectures to it.\n\nThis patch:\n\nMost show_mem() implementations calculate the amount of pages within\nthe swapcache every time. Move the output to a more appropriate place\nand use the anyway available total_swapcache_pages variable.\n\nSigned-off-by: Johannes Weiner \u003channes@saeurebad.de\u003e\nCc: Richard Henderson \u003crth@twiddle.net\u003e\nCc: Ivan Kokshaysky \u003cink@jurassic.park.msu.ru\u003e\nCc: Haavard Skinnemoen \u003chskinnemoen@atmel.com\u003e\nCc: Bryan Wu \u003ccooloney@kernel.org\u003e\nCc: Chris Zankel \u003cchris@zankel.net\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Jeff Dike \u003cjdike@addtoit.com\u003e\nCc: David S. Miller \u003cdavem@davemloft.net\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: David Howells \u003cdhowells@redhat.com\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Yoshinori Sato \u003cysato@users.sourceforge.jp\u003e\nCc: Ralf Baechle \u003cralf@linux-mips.org\u003e\nCc: Greg Ungerer \u003cgerg@uclinux.org\u003e\nCc: Geert Uytterhoeven \u003cgeert@linux-m68k.org\u003e\nCc: Roman Zippel \u003czippel@linux-m68k.org\u003e\nCc: Hirokazu Takata \u003ctakata@linux-m32r.org\u003e\nCc: Mikael Starvik \u003cstarvik@axis.com\u003e\nCc: 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": "19fd6231279be3c3bdd02ed99f9b0eb195978064", "tree": "ee09121054262d73c551b57114acd855b82a7a82", "parents": [ "a60637c85893e7191faaafa6a72e197c24386727" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Fri Jul 25 19:45:32 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Jul 26 12:00:06 2008 -0700" }, "message": "mm: spinlock tree_lock\n\nmapping-\u003etree_lock has no read lockers. convert the lock from an rwlock\nto a spinlock.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\nReviewed-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e286781d5f2e9c846e012a39653a166e9d31777d", "tree": "14958fe6d8f3e0459c96c68b3034ea2433ab85ac", "parents": [ "47feff2c8eefe85099f87c43d3096855f0085ca0" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Fri Jul 25 19:45:30 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sat Jul 26 12:00:06 2008 -0700" }, "message": "mm: speculative page references\n\nIf we can be sure that elevating the page_count on a pagecache page will\npin it, we can speculatively run this operation, and subsequently check to\nsee if we hit the right page rather than relying on holding a lock or\notherwise pinning a reference to the page.\n\nThis can be done if get_page/put_page behaves consistently throughout the\nwhole tree (ie. if we \"get\" the page after it has been used for something\nelse, we must be able to free it with a put_page).\n\nActually, there is a period where the count behaves differently: when the\npage is free or if it is a constituent page of a compound page. We need\nan atomic_inc_not_zero operation to ensure we don\u0027t try to grab the page\nin either case.\n\nThis patch introduces the core locking protocol to the pagecache (ie.\nadds page_cache_get_speculative, and tweaks some update-side code to make\nit work).\n\nThanks to Hugh for pointing out an improvement to the algorithm setting\npage_count to zero when we have control of all references, in order to\nhold off speculative getters.\n\n[kamezawa.hiroyu@jp.fujitsu.com: fix migration_entry_wait()]\n[hugh@veritas.com: fix add_to_page_cache]\n[akpm@linux-foundation.org: repair a comment]\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Jeff Garzik \u003cjeff@garzik.org\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: \"Paul E. McKenney\" \u003cpaulmck@us.ibm.com\u003e\nReviewed-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Daisuke Nishimura \u003cnishimura@mxp.nes.nec.co.jp\u003e\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: KOSAKI Motohiro \u003ckosaki.motohiro@jp.fujitsu.com\u003e\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nAcked-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": "e4ad08fe64afca4ef79ecc4c624e6e871688da0d", "tree": "5b8b390b874700041dc0c095e8ba9ac3ed42ea77", "parents": [ "76f1418b485da2707531178e517bbb5cf06b3c76" ], "author": { "name": "Miklos Szeredi", "email": "mszeredi@suse.cz", "time": "Wed Apr 30 00:54:37 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 30 08:29:50 2008 -0700" }, "message": "mm: bdi: add separate writeback accounting capability\n\nAdd a new BDI capability flag: BDI_CAP_NO_ACCT_WB. If this flag is\nset, then don\u0027t update the per-bdi writeback stats from\ntest_set_page_writeback() and test_clear_page_writeback().\n\nMisc cleanups:\n\n - convert bdi_cap_writeback_dirty() and friends to static inline functions\n - create a flag that includes all three dirty/writeback related flags,\n since almst all users will want to have them toghether\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7682486b3ee06f800d5b11033371c7c5e92e3057", "tree": "d0c2eda3204b085fc63200c787b2cf04f0298729", "parents": [ "6cb2a21049b8990df4576c5fce4d48d0206c22d5" ], "author": { "name": "Randy Dunlap", "email": "randy.dunlap@oracle.com", "time": "Wed Mar 19 17:00:40 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 19 18:53:35 2008 -0700" }, "message": "mm: fix various kernel-doc comments\n\nFix various kernel-doc notation in mm/:\n\nfilemap.c: add function short description; convert 2 to kernel-doc\nfremap.c: change parameter \u0027prot\u0027 to @prot\npagewalk.c: change \"-\" in function parameters to \":\"\nslab.c: fix short description of kmem_ptr_validate()\nswap.c: fix description \u0026 parameters of put_pages_list()\nswap_state.c: fix function parameters\nvmalloc.c: change \"@returns\" to \"Returns:\" since that is not a parameter\n\nSigned-off-by: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "fa1de9008c9bcce8ab5122529dd19b24c273eba2", "tree": "5afd94b03265ae4d9173ef471b6d5a30ed6d4ff3", "parents": [ "436c6541b13a73790646eb11429bdc8ee50eec41" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Thu Feb 07 00:14:13 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Feb 07 08:42:20 2008 -0800" }, "message": "memcgroup: revert swap_state mods\n\nIf we\u0027re charging rss and we\u0027re charging cache, it seems obvious that we\nshould be charging swapcache - as has been done. But in practice that\ndoesn\u0027t work out so well: both swapin readahead and swapoff leave the\nmajority of pages charged to the wrong cgroup (the cgroup that happened to\nread them in, rather than the cgroup to which they belong).\n\n(Which is why unuse_pte\u0027s GFP_KERNEL while holding pte lock never showed up\nas a problem: no allocation was ever done there, every page read being\nalready charged to the cgroup which initiated the swapoff.)\n\nIt all works rather better if we leave the charging to do_swap_page and\nunuse_pte, and do nothing for swapcache itself: revert mm/swap_state.c to\nwhat it was before the memory-controller patches. This also speeds up\nsignificantly a contained process working at its limit: because it no\nlonger needs to keep waiting for swap writeback to complete.\n\nIs it unfair that swap pages become uncharged once they\u0027re unmapped, even\nthough they\u0027re still clearly private to particular cgroups? For a short\nwhile, yes; but PageReclaim arranges for those pages to go to the end of\nthe inactive list and be reclaimed soon if necessary.\n\nshmem/tmpfs pages are a distinct case: their charging also benefits from\nthis change, but their second life on the lists as swapcache pages may\nprove more unfair - that I need to check next.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Pavel Emelianov \u003cxemul@openvz.org\u003e\nAcked-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Kirill Korotaev \u003cdev@sw.ru\u003e\nCc: Herbert Poetzl \u003cherbert@13thfloor.at\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Vaidyanathan Srinivasan \u003csvaidy@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": "35c754d79f4da80d5e8972f6403dd26f7962fd88", "tree": "5e497fd0ac832b5c832044d0267170d7144e1a0e", "parents": [ "044d66c1d2b1c5aa50b4d6d68c21c6c93dd678da" ], "author": { "name": "Balbir Singh", "email": "balbir@linux.vnet.ibm.com", "time": "Thu Feb 07 00:14:05 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Feb 07 08:42:19 2008 -0800" }, "message": "memory controller BUG_ON()\n\nMove mem_controller_cache_charge() above radix_tree_preload().\nradix_tree_preload() disables preemption, even though the gfp_mask passed\ncontains __GFP_WAIT, we cannot really do __GFP_WAIT allocations, thus we\nhit a BUG_ON() in kmem_cache_alloc().\n\nThis patch moves mem_controller_cache_charge() to above radix_tree_preload()\nfor cache charging.\n\nSigned-off-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e1a1cd590e3fcb0d2e230128daf2337ea55387dc", "tree": "eb660ab340c657a1eb595b2d4d8e8b62783bf6fb", "parents": [ "bed7161a519a2faef53e1bce1b47595e297c1d14" ], "author": { "name": "Balbir Singh", "email": "balbir@linux.vnet.ibm.com", "time": "Thu Feb 07 00:14:02 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Feb 07 08:42:19 2008 -0800" }, "message": "Memory controller: make charging gfp mask aware\n\nNick Piggin pointed out that swap cache and page cache addition routines\ncould be called from non GFP_KERNEL contexts. This patch makes the\ncharging routine aware of the gfp context. Charging might fail if the\ncgroup is over it\u0027s limit, in which case a suitable error is returned.\n\nThis patch was tested on a Powerpc box. I am still looking at being able\nto test the path, through which allocations happen in non GFP_KERNEL\ncontexts.\n\n[kamezawa.hiroyu@jp.fujitsu.com: problem with ZONE_MOVABLE]\nSigned-off-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Pavel Emelianov \u003cxemul@openvz.org\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Kirill Korotaev \u003cdev@sw.ru\u003e\nCc: Herbert Poetzl \u003cherbert@13thfloor.at\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Vaidyanathan Srinivasan \u003csvaidy@linux.vnet.ibm.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": "8697d33194faae6fdd6b2e799f6308aa00cfdf67", "tree": "edf6b3e4698b80aac6f1d1f2b9e5698ce8dfa6e5", "parents": [ "c7ba5c9e8176704bfac0729875fa62798037584d" ], "author": { "name": "Balbir Singh", "email": "balbir@linux.vnet.ibm.com", "time": "Thu Feb 07 00:13:59 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Feb 07 08:42:19 2008 -0800" }, "message": "Memory controller: add switch to control what type of pages to limit\n\nChoose if we want cached pages to be accounted or not. By default both are\naccounted for. A new set of tunables are added.\n\necho -n 1 \u003e mem_control_type\n\nswitches the accounting to account for only mapped pages\n\necho -n 3 \u003e mem_control_type\n\nswitches the behaviour back\n\n[bunk@kernel.org: mm/memcontrol.c: clenups]\n[akpm@linux-foundation.org: fix sparc32 build]\nSigned-off-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Pavel Emelianov \u003cxemul@openvz.org\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Kirill Korotaev \u003cdev@sw.ru\u003e\nCc: Herbert Poetzl \u003cherbert@13thfloor.at\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Vaidyanathan Srinivasan \u003csvaidy@linux.vnet.ibm.com\u003e\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": "8a9f3ccd24741b50200c3f33d62534c7271f3dfc", "tree": "066aabd8d2952299501f067a91cbfd6f47ee62f6", "parents": [ "78fb74669e80883323391090e4d26d17fe29488f" ], "author": { "name": "Balbir Singh", "email": "balbir@linux.vnet.ibm.com", "time": "Thu Feb 07 00:13:53 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Feb 07 08:42:18 2008 -0800" }, "message": "Memory controller: memory accounting\n\nAdd the accounting hooks. The accounting is carried out for RSS and Page\nCache (unmapped) pages. There is now a common limit and accounting for both.\nThe RSS accounting is accounted at page_add_*_rmap() and page_remove_rmap()\ntime. Page cache is accounted at add_to_page_cache(),\n__delete_from_page_cache(). Swap cache is also accounted for.\n\nEach page\u0027s page_cgroup is protected with the last bit of the\npage_cgroup pointer, this makes handling of race conditions involving\nsimultaneous mappings of a page easier. A reference count is kept in the\npage_cgroup to deal with cases where a page might be unmapped from the RSS\nof all tasks, but still lives in the page cache.\n\nCredits go to Vaidyanathan Srinivasan for helping with reference counting work\nof the page cgroup. Almost all of the page cache accounting code has help\nfrom Vaidyanathan Srinivasan.\n\n[hugh@veritas.com: fix swapoff breakage]\n[akpm@linux-foundation.org: fix locking]\nSigned-off-by: Vaidyanathan Srinivasan \u003csvaidy@linux.vnet.ibm.com\u003e\nSigned-off-by: Balbir Singh \u003cbalbir@linux.vnet.ibm.com\u003e\nCc: Pavel Emelianov \u003cxemul@openvz.org\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Kirill Korotaev \u003cdev@sw.ru\u003e\nCc: Herbert Poetzl \u003cherbert@13thfloor.at\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: \u003cValdis.Kletnieks@vt.edu\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": "0ed361dec36945f3116ee1338638ada9a8920905", "tree": "3e0fc6319ef49f6cac82e8203a8aa199302ab9c5", "parents": [ "62e1c55300f306e06478f460a7eefba085206e0b" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Mon Feb 04 22:29:34 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:19 2008 -0800" }, "message": "mm: fix PageUptodate data race\n\nAfter running SetPageUptodate, preceeding stores to the page contents to\nactually bring it uptodate may not be ordered with the store to set the\npage uptodate.\n\nTherefore, another CPU which checks PageUptodate is true, then reads the\npage contents can get stale data.\n\nFix this by having an smp_wmb before SetPageUptodate, and smp_rmb after\nPageUptodate.\n\nMany places that test PageUptodate, do so with the page locked, and this\nwould be enough to ensure memory ordering in those places if\nSetPageUptodate were only called while the page is locked. Unfortunately\nthat is not always the case for some filesystems, but it could be an idea\nfor the future.\n\nAlso bring the handling of anonymous page uptodateness in line with that of\nfile backed page management, by marking anon pages as uptodate when they\n_are_ uptodate, rather than when our implementation requires that they be\nmarked as such. Doing allows us to get rid of the smp_wmb\u0027s in the page\ncopying functions, which were especially added for anonymous pages for an\nanalogous memory ordering problem. Both file and anonymous pages are\nhandled with the same barriers.\n\nFAQ:\nQ. Why not do this in flush_dcache_page?\nA. Firstly, flush_dcache_page handles only one side (the smb side) of the\nordering protocol; we\u0027d still need smp_rmb somewhere. Secondly, hiding away\nmemory barriers in a completely unrelated function is nasty; at least in the\nPageUptodate macros, they are located together with (half) the operations\ninvolved in the ordering. Thirdly, the smp_wmb is only required when first\nbringing the page uptodate, wheras flush_dcache_page should be called each time\nit is written to through the kernel mapping. It is logically the wrong place to\nput it.\n\nQ. Why does this increase my text size / reduce my performance / etc.\nA. Because it is adding the necessary instructions to eliminate the data-race.\n\nQ. Can it be improved?\nA. Yes, eg. if you were to create a rule that all SetPageUptodate operations\nrun under the page lock, we could avoid the smp_rmb places where PageUptodate\nis queried under the page lock. Requires audit of all filesystems and at least\nsome would need reworking. That\u0027s great you\u0027re interested, I\u0027m eagerly awaiting\nyour patches.\n\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": "73b1262fa43a778b1e154deea632cdef5009d6a1", "tree": "409f14e78e23cd999e8c3d1e0945f0fa9b67048f", "parents": [ "f000944d03a5b74ab3c92b2fcdf0e944cc898065" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:28:50 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:15 2008 -0800" }, "message": "tmpfs: move swap swizzling into shmem\n\nmove_to_swap_cache and move_from_swap_cache functions (which swizzle a page\nbetween tmpfs page cache and swap cache, to avoid page copying) are only used\nby shmem.c; and our subsequent fix for unionfs needs different treatments in\nthe two instances of move_from_swap_cache. Move them from swap_state.c into\ntheir callsites shmem_writepage, shmem_unuse_inode and shmem_getpage, making\nadd_to_swap_cache externally visible.\n\nshmem.c likes to say set_page_dirty where swap_state.c liked to say\nSetPageDirty: respect that diversity, which __set_page_dirty_no_writeback\nmakes moot (and implies we should lose that \"shift page from clean_pages to\ndirty_pages list\" comment: it\u0027s on neither).\n\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": "f000944d03a5b74ab3c92b2fcdf0e944cc898065", "tree": "07b64eeed416f3869a3fc4f06d00bd1fb1321f20", "parents": [ "bb63be0a091c512fb566ee235eb8320d5831b6e2" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:28:49 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:15 2008 -0800" }, "message": "tmpfs: shuffle add_to_swap_caches\n\nadd_to_swap_cache doesn\u0027t amount to much: merge it into its sole caller\nread_swap_cache_async. But we\u0027ll be needing to call __add_to_swap_cache from\nshmem.c, so promote it to the new add_to_swap_cache. Both were static, so\nthere\u0027s no interface confusion to worry about.\n\nAnd lose that inappropriate \"Anon pages are already on the LRU\" comment in the\nmerging: they\u0027re not already on the LRU, as Nick Piggin noticed.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nNo-problems-with: 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": "bb63be0a091c512fb566ee235eb8320d5831b6e2", "tree": "3fc58d190902417429228c3066b6093a848c5974", "parents": [ "818db35992c249dc32c1d86daf7d533fb0952f5d" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:28:49 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:15 2008 -0800" }, "message": "tmpfs: move swap_state stats update\n\nBoth unionfs and memcgroups pose challenges to tmpfs and shmem. To help fix,\nit\u0027s best to move the swap swizzling functions from swap_state.c to shmem.c.\nAs a preliminary to that, move swap stats updating down into\n__add_to_swap_cache, which will remain internal to swap_state.c.\n\nWell, actually, just move down the incrementation of add_total: remove\nnoent_race and exist_race completely, they are relics of my 2.4.11 testing.\nAlt-SysRq-m users will be thrilled if 2.6.25 is at last free of \"race M+N\"s.\n\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": "02098feaa42b2e0087fbbe6c6ab9a23e4653b16a", "tree": "494eaf13f204c9384d4316202fd76cd1b5d960ad", "parents": [ "46017e954826ac59e91df76341a3f76b45467847" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:28:42 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:14 2008 -0800" }, "message": "swapin needs gfp_mask for loop on tmpfs\n\nBuilding in a filesystem on a loop device on a tmpfs file can hang when\nswapping, the loop thread caught in that infamous throttle_vm_writeout.\n\nIn theory this is a long standing problem, which I\u0027ve either never seen in\npractice, or long ago suppressed the recollection, after discounting my load\nand my tmpfs size as unrealistically high. But now, with the new aops, it has\nbecome easy to hang on one machine.\n\nLoop used to grab_cache_page before the old prepare_write to tmpfs, which\nseems to have been enough to free up some memory for any swapin needed; but\nthe new write_begin lets tmpfs find or allocate the page (much nicer, since\ngrab_cache_page missed tmpfs pages in swapcache).\n\nWhen allocating a fresh page, tmpfs respects loop\u0027s mapping_gfp_mask, which\nhas __GFP_IO|__GFP_FS stripped off, and throttle_vm_writeout is designed to\nbreak out when __GFP_IO or GFP_FS is unset; but when tmfps swaps in,\nread_swap_cache_async allocates with GFP_HIGHUSER_MOVABLE regardless of the\nmapping_gfp_mask - hence the hang.\n\nSo, pass gfp_mask down the line from shmem_getpage to shmem_swapin to\nswapin_readahead to read_swap_cache_async to add_to_swap_cache.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "46017e954826ac59e91df76341a3f76b45467847", "tree": "711a35e3936118665d0eac2afeef8758b4f4e95f", "parents": [ "c4cc6d07b2f465fbf5efd99bbe772a49c515f3f2" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Feb 04 22:28:41 2008 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Feb 05 09:44:14 2008 -0800" }, "message": "swapin_readahead: move and rearrange args\n\nswapin_readahead has never sat well in mm/memory.c: move it to mm/swap_state.c\nbeside its kindred read_swap_cache_async. Why were its args in a different\norder? rearrange them. And since it was always followed by a\nread_swap_cache_async of the target page, fold that in and return struct\npage*. Then CONFIG_SWAP\u003dn no longer needs valid_swaphandles and\nread_swap_cache_async stubs.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nAcked-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": "b55ed816235cf41c29159d22a4cdeec7deb5821c", "tree": "73245c1da2c5352c526d4d25f02e69943b4b0b15", "parents": [ "45726cb43d11b288c58243a26010f397054222f0" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Tue Oct 16 01:24:42 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:53 2007 -0700" }, "message": "mm: clarify __add_to_swap_cache locking\n\n__add_to_swap_cache unconditionally sets the page locked, which can be a bit\nalarming to the unsuspecting reader: in the code paths where the page is\nvisible to other CPUs, the page should be (and is) already locked.\n\nInstead, just add a check to ensure the page is locked here, and teach the one\npath relying on the old behaviour to call SetPageLocked itself.\n\n[hugh@veritas.com: locking fix]\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\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": "769848c03895b63e5662eb7e4ec8c4866f7d0183", "tree": "8911c7c312c8b8b172795fa2874c8162e1d3d15a", "parents": [ "a32ea1e1f925399e0d81ca3f7394a44a6dafa12c" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jul 17 04:03:05 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Jul 17 10:22:59 2007 -0700" }, "message": "Add __GFP_MOVABLE for callers to flag allocations from high memory that may be migrated\n\nIt is often known at allocation time whether a page may be migrated or not.\nThis patch adds a flag called __GFP_MOVABLE and a new mask called\nGFP_HIGH_MOVABLE. Allocations using the __GFP_MOVABLE can be either migrated\nusing the page migration mechanism or reclaimed by syncing with backing\nstorage and discarding.\n\nAn API function very similar to alloc_zeroed_user_highpage() is added for\n__GFP_MOVABLE allocations called alloc_zeroed_user_highpage_movable(). The\nflags used by alloc_zeroed_user_highpage() are not changed because it would\nchange the semantics of an existing API. After this patch is applied there\nare no in-kernel users of alloc_zeroed_user_highpage() so it probably should\nbe marked deprecated if this patch is merged.\n\nNote that this patch includes a minor cleanup to the use of __GFP_ZERO in\nshmem.c to keep all flag modifications to inode-\u003emapping in the\nshmem_dir_alloc() helper function. This clean-up suggestion is courtesy of\nHugh Dickens.\n\nAdditional credit goes to Christoph Lameter and Linus Torvalds for shaping the\nconcept. Credit to Hugh Dickens for catching issues with shmem swap vector\nand ramfs allocations.\n\n[akpm@linux-foundation.org: build fix]\n[hugh@veritas.com: __GFP_ZERO cleanup]\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andy Whitcroft \u003capw@shadowen.org\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2706a1b89b1a3e7434a668d4a9d15f616da96685", "tree": "6b8d8b8d24811c7f8b4593e0b600533f9d5329f6", "parents": [ "553948491c18413928b85a9025b92af80e7d61d6" ], "author": { "name": "Anderson Briglia", "email": "briglia.anderson@gmail.com", "time": "Sun Jul 15 23:38:09 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Jul 16 09:05:35 2007 -0700" }, "message": "vmscan: fix comments related to shrink_list()\n\nFix the shrink_list name on some files under mm/ directory.\n\nSigned-off-by: Anderson Briglia \u003canderson.briglia@indt.org.br\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e4d919188554a77c798a267e098059bc9aa39726", "tree": "bb5e47e09f5d107db44358ad668988f5ae768ade", "parents": [ "9cebb5526833059f327d237a032422c762378b2a" ], "author": { "name": "Ingo Molnar", "email": "mingo@elte.hu", "time": "Mon Jul 03 00:24:34 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Jul 03 15:27:02 2006 -0700" }, "message": "[PATCH] lockdep: locking init debugging improvement\n\nLocking init improvement:\n\n - introduce and use __SPIN_LOCK_UNLOCKED for array initializations,\n to pass in the name string of locks, used by debugging\n\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Arjan van de Ven \u003carjan@linux.intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "347ce434d57da80fd5809c0c836f206a50999c26", "tree": "f730d151be77977f594e5cc083a93bbeb4c602cc", "parents": [ "65ba55f500a37272985d071c9bbb35256a2f7c14" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Fri Jun 30 01:55:35 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Jun 30 11:25:34 2006 -0700" }, "message": "[PATCH] zoned vm counters: conversion of nr_pagecache to per zone counter\n\nCurrently a single atomic variable is used to establish the size of the page\ncache in the whole machine. The zoned VM counters have the same method of\nimplementation as the nr_pagecache code but also allow the determination of\nthe pagecache size per zone.\n\nRemove the special implementation for nr_pagecache and make it a zoned counter\nnamed NR_FILE_PAGES.\n\nUpdates of the page cache counters are always performed with interrupts off.\nWe can therefore use the __ variant here.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Trond Myklebust \u003ctrond.myklebust@fys.uio.no\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "f5e54d6e53a20cef45af7499e86164f0e0d16bb2", "tree": "cb92acbb89b84796261bf5563182261ec5654127", "parents": [ "a052b68b1e7a31f1e6a721290035e9deb0f6fed9" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Wed Jun 28 04:26:44 2006 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Jun 28 14:59:04 2006 -0700" }, "message": "[PATCH] mark address_space_operations const\n\nSame as with already do with the file operations: keep them in .rodata and\nprevents people from doing runtime patching.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nCc: Steven French \u003csfrench@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "e74ca2b49b8a38e9ba0bc039a00498c21140f1d6", "tree": "6700884d9dea7d382d09abd9b79ea931390f3ccc", "parents": [ "46a350ef9803a2526a128c55cdb27dd73b2ad966" ], "author": { "name": "Eric Sesterhenn", "email": "snakebyte@gmx.de", "time": "Sat Apr 01 01:25:12 2006 +0200" }, "committer": { "name": "Adrian Bunk", "email": "bunk@stusta.de", "time": "Sat Apr 01 01:25:12 2006 +0200" }, "message": "BUG_ON() Conversion in mm/swap_state.c\n\nthis changes if() BUG(); constructs to BUG_ON() which is\ncleaner, contains unlikely() and can better optimized away.\n\nSigned-off-by: Eric Sesterhenn \u003csnakebyte@gmx.de\u003e\nSigned-off-by: Adrian Bunk \u003cbunk@stusta.de\u003e\n" }, { "commit": "b20a35035f983f4ac7e29c4a68f30e43510007e0", "tree": "fdf090ddddbcc275349f62f71adc98649e2c683b", "parents": [ "442295c94bf650221af3ef20fc68fa3e93876818" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Wed Mar 22 00:09:12 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Mar 22 07:54:06 2006 -0800" }, "message": "[PATCH] page migration reorg\n\nCentralize the page migration functions in anticipation of additional\ntinkering. Creates a new file mm/migrate.c\n\n1. Extract buffer_migrate_page() from fs/buffer.c\n\n2. Extract central migration code from vmscan.c\n\n3. Extract some components from mempolicy.c\n\n4. Export pageout() and remove_from_swap() from vmscan.c\n\n5. Make it possible to configure NUMA systems without page migration\n and non-NUMA systems with page migration.\n\nI had to so some #ifdeffing in mempolicy.c that may need a cleanup.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "e965f9630c651fa4249039fd4b80c9392d07a856", "tree": "1353dd536d0ee549c30e462086624c21788ee9d2", "parents": [ "7e2ab150d1b3b286a4c864c60a549b2601777b63" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Wed Feb 01 03:05:41 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Wed Feb 01 08:53:17 2006 -0800" }, "message": "[PATCH] Direct Migration V9: Avoid writeback / page_migrate() method\n\nMigrate a page with buffers without requiring writeback\n\nThis introduces a new address space operation migratepage() that may be used\nby a filesystem to implement its own version of page migration.\n\nA version is provided that migrates buffers attached to pages. Some\nfilesystems (ext2, ext3, xfs) are modified to utilize this feature.\n\nThe swapper address space operation are modified so that a regular\nmigrate_page() will occur for anonymous pages without writeback (migrate_pages\nforces every anonymous page to have a swap entry).\n\nSigned-off-by: Mike Kravetz \u003ckravetz@us.ibm.com\u003e\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "1480a540c98525640174a7eadd712378fcd6fd63", "tree": "28f2cc0aa819ff0aed30dd85bb16177d4a73002b", "parents": [ "8419c3181086c86664e8246bc997afc2e4ffba4f" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Sun Jan 08 01:00:53 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sun Jan 08 20:12:42 2006 -0800" }, "message": "[PATCH] SwapMig: add_to_swap() avoid atomic allocations\n\nAdd gfp_mask to add_to_swap\n\nadd_to_swap does allocations with GFP_ATOMIC in order not to interfere with\nswapping. During migration we may have use add_to_swap extensively which may\nlead to out of memory errors.\n\nThis patch makes add_to_swap take a parameter that specifies the gfp mask.\nThe page migration code can then make add_to_swap use GFP_KERNEL.\n\nSigned-off-by: Hirokazu Takahashi \u003ctaka@valinux.co.jp\u003e\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "c484d41042e6ccb88089ca41e3b3eed1bafdae21", "tree": "c65e522698456899ed5ab058373d3ca2aad1650b", "parents": [ "161599ff39a3c3cdea0a1be05ac53accd2c45cdd" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Fri Jan 06 00:10:55 2006 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Fri Jan 06 08:33:24 2006 -0800" }, "message": "[PATCH] mm: free_pages_and_swap_cache opt\n\nMinor optimization (though it doesn\u0027t help in the PREEMPT case, severely\nconstrained by small ZAP_BLOCK_SIZE). free_pages_and_swap_cache works in\nchunks of 16, calling release_pages which works in chunks of PAGEVEC_SIZE.\nBut PAGEVEC_SIZE was dropped from 16 to 14 in 2.6.10, so we\u0027re now doing more\nspin_lock_irq\u0027ing than necessary: use PAGEVEC_SIZE throughout.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "4936967374c1ad0eb3b734f24875e2484c3786cc", "tree": "99d7edc8c2730d68ca4b4ef7ee26b8401667b521", "parents": [ "e2de225710b0f7480c29700bf93326b078657db8" ], "author": { "name": "Adrian Bunk", "email": "bunk@stusta.de", "time": "Mon Nov 07 01:01:41 2005 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Mon Nov 07 07:54:07 2005 -0800" }, "message": "[PATCH] mm/swap_state.c: unexport swapper_space\n\nI didn\u0027t find any possible modular usage in the kernel.\n\nSigned-off-by: Adrian Bunk \u003cbunk@stusta.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "b8072f099b7829a6ff3eba618e1d079a81f753f8", "tree": "80bf801b68ecf5f29a61f0f4fd5976b4daa91c6a", "parents": [ "f412ac08c9861b4791af0145934c22f1458686da" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Sat Oct 29 18:16:41 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Oct 29 21:40:42 2005 -0700" }, "message": "[PATCH] mm: update comments to pte lock\n\nUpdated several references to page_table_lock in common code comments.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "4c21e2f2441dc5fbb957b030333f5a3f2d02dea7", "tree": "1f76d33bb1d76221c6424bc5fed080a4f91349a6", "parents": [ "b38c6845b695141259019e2b7c0fe6c32a6e720d" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Sat Oct 29 18:16:40 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Oct 29 21:40:42 2005 -0700" }, "message": "[PATCH] mm: split page table lock\n\nChristoph Lameter demonstrated very poor scalability on the SGI 512-way, with\na many-threaded application which concurrently initializes different parts of\na large anonymous area.\n\nThis patch corrects that, by using a separate spinlock per page table page, to\nguard the page table entries in that page, instead of using the mm\u0027s single\npage_table_lock. (But even then, page_table_lock is still used to guard page\ntable allocation, and anon_vma allocation.)\n\nIn this implementation, the spinlock is tucked inside the struct page of the\npage table page: with a BUILD_BUG_ON in case it overflows - which it would in\nthe case of 32-bit PA-RISC with spinlock debugging enabled.\n\nSplitting the lock is not quite for free: another cacheline access. Ideally,\nI suppose we would use split ptlock only for multi-threaded processes on\nmulti-cpu machines; but deciding that dynamically would have its own costs.\nSo for now enable it by config, at some number of cpus - since the Kconfig\nlanguage doesn\u0027t support inequalities, let preprocessor compare that with\nNR_CPUS. But I don\u0027t think it\u0027s worth being user-configurable: for good\ntesting of both split and unsplit configs, split now at 4 cpus, and perhaps\nchange that to 8 later.\n\nThere is a benefit even for singly threaded processes: kswapd can be attacking\none part of the mm while another part is busy faulting.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "dd0fc66fb33cd610bc1a5db8a5e232d34879b4d7", "tree": "51f96a9db96293b352e358f66032e1f4ff79fafb", "parents": [ "3b0e77bd144203a507eb191f7117d2c5004ea1de" ], "author": { "name": "Al Viro", "email": "viro@ftp.linux.org.uk", "time": "Fri Oct 07 07:46:04 2005 +0100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Oct 08 15:00:57 2005 -0700" }, "message": "[PATCH] gfp flags annotations - part 1\n\n - added typedef unsigned int __nocast gfp_t;\n\n - replaced __nocast uses for gfp flags with gfp_t - it gives exactly\n the same warnings as far as sparse is concerned, doesn\u0027t change\n generated code (from gcc point of view we replaced unsigned int with\n typedef) and documents what\u0027s going on far better.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "9de75d110c9681d4aaa7fe87b8db99d5562012a2", "tree": "33c4c1fcfc8ed6b38c062f0aaf31c8f84d8eb946", "parents": [ "e776eba0feaea9a3eba7aff73f50701b9804b57f" ], "author": { "name": "Victor Fusco", "email": "victor@cetuc.puc-rio.br", "time": "Sat Sep 10 00:26:46 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@g5.osdl.org", "time": "Sat Sep 10 10:06:28 2005 -0700" }, "message": "[PATCH] mm/swap_state: Fix \"nocast type\" warnings\n\nFix the sparse warning \"implicit cast to nocast type\"\n\nSigned-off-by: Victor Fusco \u003cvictor@cetuc.puc-rio.br\u003e\nSigned-off-by: Domen Puncer \u003cdomen@coderock.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "3279ffd97f1b3962e40d3c5f09495ef8320b180b", "tree": "56c72808c731a73fd50f3df37fd3af770812a7ee", "parents": [ "dae06ac43d56d23e50a2300d511b32a9e38cd657" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Sat Sep 03 15:54:43 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@evo.osdl.org", "time": "Mon Sep 05 00:05:42 2005 -0700" }, "message": "[PATCH] delete from_swap_cache BUG_ONs\n\nThree of the four BUG_ONs in delete_from_swap_cache are immediately\nrepeated in __delete_from_swap_cache: delete those and add the one. But\nperhaps mm/ is altogether overprovisioned with historic BUGs?\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "bd53b714d32a29bdf33009f812e295667e92b930", "tree": "b8b6e72fcda7b40d2273498bfa16ba53e15e7917", "parents": [ "20a77776c24800d1e40a73f520cfcb32239568a9" ], "author": { "name": "Nick Piggin", "email": "nickpiggin@yahoo.com.au", "time": "Sun May 01 08:58:37 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sun May 01 08:58:37 2005 -0700" }, "message": "[PATCH] mm: use __GFP_NOMEMALLOC\n\nUse the new __GFP_NOMEMALLOC to simplify the previous handling of\nPF_MEMALLOC.\n\nSigned-off-by: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n" }, { "commit": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "tree": "0bba044c4ce775e45a88a51686b5d9f90697ea9d", "parents": [], "author": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Apr 16 15:20:36 2005 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@ppc970.osdl.org", "time": "Sat Apr 16 15:20:36 2005 -0700" }, "message": "Linux-2.6.12-rc2\n\nInitial git repository build. I\u0027m not bothering with the full history,\neven though we have it. We can create a separate \"historical\" git\narchive of that later if we want to, and in the meantime it\u0027s about\n3.2GB when imported into git - space that would just make the early\ngit days unnecessarily complicated, when we don\u0027t have a lot of good\ninfrastructure for it.\n\nLet it rip!\n" } ] }