)]}' { "log": [ { "commit": "2f718ffc16c43a435d12919c75dbfad518abd056", "tree": "55588cb2815d844e9d0b2404cf8ceafe98b5c55d", "parents": [ "08291429cfa6258c4cd95d8833beb40f828b194e" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Tue Oct 16 01:24:59 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:55 2007 -0700" }, "message": "mm: buffered write iterator\n\nAdd an iterator data structure to operate over an iovec. Add usercopy\noperators needed by generic_file_buffered_write, and convert that function\nover.\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": "08291429cfa6258c4cd95d8833beb40f828b194e", "tree": "50a206f0f0e7a5400b44073107ff00517e6f50ac", "parents": [ "4a9e5ef1f4f15205e477817a5cefc34bd3f65f55" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Tue Oct 16 01:24:59 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:54 2007 -0700" }, "message": "mm: fix pagecache write deadlocks\n\nModify the core write() code so that it won\u0027t take a pagefault while holding a\nlock on the pagecache page. There are a number of different deadlocks possible\nif we try to do such a thing:\n\n1. generic_buffered_write\n2. lock_page\n3. prepare_write\n4. unlock_page+vmtruncate\n5. copy_from_user\n6. mmap_sem(r)\n7. handle_mm_fault\n8. lock_page (filemap_nopage)\n9. commit_write\n10. unlock_page\n\na. sys_munmap / sys_mlock / others\nb. mmap_sem(w)\nc. make_pages_present\nd. get_user_pages\ne. handle_mm_fault\nf. lock_page (filemap_nopage)\n\n2,8\t- recursive deadlock if page is same\n2,8;2,8\t- ABBA deadlock is page is different\n2,6;b,f\t- ABBA deadlock if page is same\n\nThe solution is as follows:\n1. If we find the destination page is uptodate, continue as normal, but use\n atomic usercopies which do not take pagefaults and do not zero the uncopied\n tail of the destination. The destination is already uptodate, so we can\n commit_write the full length even if there was a partial copy: it does not\n matter that the tail was not modified, because if it is dirtied and written\n back to disk it will not cause any problems (uptodate *means* that the\n destination page is as new or newer than the copy on disk).\n\n1a. The above requires that fault_in_pages_readable correctly returns access\n information, because atomic usercopies cannot distinguish between\n non-present pages in a readable mapping, from lack of a readable mapping.\n\n2. If we find the destination page is non uptodate, unlock it (this could be\n made slightly more optimal), then allocate a temporary page to copy the\n source data into. Relock the destination page and continue with the copy.\n However, instead of a usercopy (which might take a fault), copy the data\n from the pinned temporary page via the kernel address space.\n\n(also, rename maxlen to seglen, because it was confusing)\n\nThis increases the CPU/memory copy cost by almost 50% on the affected\nworkloads. That will be solved by introducing a new set of pagecache write\naops in a subsequent patch.\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": "4a9e5ef1f4f15205e477817a5cefc34bd3f65f55", "tree": "51f52086ecbccc3f41955d8d12293ef7a566a05b", "parents": [ "eb2be189317d031895b5ca534fbf735eb546158b" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Tue Oct 16 01:24:58 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:54 2007 -0700" }, "message": "mm: write iovec cleanup\n\nHide some of the open-coded nr_segs tests into the iovec helpers. This is all\nto simplify generic_file_buffered_write, because that gets more complex in the\nnext patch.\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": "eb2be189317d031895b5ca534fbf735eb546158b", "tree": "8f1eda7af3be7285244a6f1ad77682e90d403c7b", "parents": [ "64649a58919e66ec21792dbb6c48cb3da22cbd7f" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Tue Oct 16 01:24:57 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:54 2007 -0700" }, "message": "mm: buffered write cleanup\n\nQuite a bit of code is used in maintaining these \"cached pages\" that are\nprobably pretty unlikely to get used. It would require a narrow race where\nthe page is inserted concurrently while this process is allocating a page\nin order to create the spare page. Then a multi-page write into an uncached\npart of the file, to make use of it.\n\nNext, the buffered write path (and others) uses its own LRU pagevec when it\nshould be just using the per-CPU LRU pagevec (which will cut down on both data\nand code size cacheline footprint). Also, these private LRU pagevecs are\nemptied after just a very short time, in contrast with the per-CPU pagevecs\nthat are persistent. Net result: 7.3 times fewer lru_lock acquisitions required\nto add the pages to pagecache for a bulk write (in 4K chunks).\n\n[this gets rid of some cond_resched() calls in readahead.c and mpage.c due\n to clashes in -mm. What put them there, and why? ]\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": "64649a58919e66ec21792dbb6c48cb3da22cbd7f", "tree": "054605b7da7bad43c299ef66de9d33fda87cd38d", "parents": [ "5fe172370687e03cc6ba8dca990b75db18ff9bb3" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Tue Oct 16 01:24:56 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:54 2007 -0700" }, "message": "mm: trim more holes\n\nIf prepare_write fails with AOP_TRUNCATED_PAGE, or if commit_write fails, then\nwe may have failed the write operation despite prepare_write having\ninstantiated blocks past i_size. Fix this, and consolidate the trimming into\none place.\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": "5fe172370687e03cc6ba8dca990b75db18ff9bb3", "tree": "8ce000fee15fa9ccd4313018f7f9ab1ffbc8cdaa", "parents": [ "ae37461c70bc8c8416cad1bab13a9898ed030aa1" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Tue Oct 16 01:24:56 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:54 2007 -0700" }, "message": "mm: debug write deadlocks\n\nAllow CONFIG_DEBUG_VM to switch off the prefaulting logic, to simulate the\nMakes the race much easier to hit.\n\nThis is useful for demonstration and testing purposes, but is removed in a\nsubsequent patch.\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": "ae37461c70bc8c8416cad1bab13a9898ed030aa1", "tree": "7ba24faab6f89651fd2b3d33563847764744d544", "parents": [ "6814d7a91289ceb143285975e244a8f00fd3a830" ], "author": { "name": "Andrew Morton", "email": "akpm@osdl.org", "time": "Tue Oct 16 01:24:55 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:54 2007 -0700" }, "message": "mm: clean up buffered write code\n\nRename some variables and fix some types.\n\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6814d7a91289ceb143285975e244a8f00fd3a830", "tree": "e439e5d802d6ebaa73bac8b08c311ca60d4c8ee4", "parents": [ "4b49643fbb3fa8bf4910f82be02d45e94e8972a4" ], "author": { "name": "Andrew Morton", "email": "akpm@osdl.org", "time": "Tue Oct 16 01:24:54 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:54 2007 -0700" }, "message": "Revert \"[PATCH] generic_file_buffered_write(): deadlock on vectored write\"\n\nThis reverts commit 6527c2bdf1f833cc18e8f42bd97973d583e4aa83, which\nfixed the following bug:\n\n When prefaulting in the pages in generic_file_buffered_write(), we only\n faulted in the pages for the firts segment of the iovec. If the second of\n successive segment described a mmapping of the page into which we\u0027re\n write()ing, and that page is not up-to-date, the fault handler tries to lock\n the already-locked page (to bring it up to date) and deadlocks.\n\n An exploit for this bug is in writev-deadlock-demo.c, in\n http://www.zip.com.au/~akpm/linux/patches/stuff/ext3-tools.tar.gz.\n\n (These demos assume blocksize \u003c PAGE_CACHE_SIZE).\n\nThe problem with this fix is that it takes the kernel back to doing a single\nprepare_write()/commit_write() per iovec segment. So in the worst case we\u0027ll\nrun prepare_write+commit_write 1024 times where we previously would have run\nit once. The other problem with the fix is that it fix all the locking problems.\n\n\u003cinsert numbers obtained via ext3-tools\u0027s writev-speed.c here\u003e\n\nAnd apparently this change killed NFS overwrite performance, because, I\nsuppose, it talks to the server for each prepare_write+commit_write.\n\nSo just back that patch out - we\u0027ll be fixing the deadlock by other means.\n\nNick says: also it only ever actually papered over the bug, because after\nfaulting in the pages, they might be unmapped or reclaimed.\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": "4b49643fbb3fa8bf4910f82be02d45e94e8972a4", "tree": "ee3bc7881a1e0b71fa093254bb725ad467d8ef72", "parents": [ "41cb8ac025dbbf6782eae10d231e7e2336ad3724" ], "author": { "name": "Andrew Morton", "email": "akpm@osdl.org", "time": "Tue Oct 16 01:24:54 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:54 2007 -0700" }, "message": "Revert \"[PATCH] generic_file_buffered_write(): handle zero-length iovec segments\"\n\nThis reverts commit 81b0c8713385ce1b1b9058e916edcf9561ad76d6, which was\na bugfix against 6527c2bdf1f833cc18e8f42bd97973d583e4aa83 (\"[PATCH]\ngeneric_file_buffered_write(): deadlock on vectored write\"), which we\nalso revert.\n\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "41cb8ac025dbbf6782eae10d231e7e2336ad3724", "tree": "0070e26ee574338a4a3f56f574e1c126a4357c8e", "parents": [ "902aaed0d983dfd459fcb2b678608d4584782200" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Tue Oct 16 01:24:53 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:54 2007 -0700" }, "message": "mm: revert KERNEL_DS buffered write optimisation\n\nRevert the patch from Neil Brown to optimise NFSD writev handling.\n\nCc: Neil Brown \u003cneilb@suse.de\u003e\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "902aaed0d983dfd459fcb2b678608d4584782200", "tree": "00b18597d87101ba1b37e5dcfde1d91312870160", "parents": [ "754af6f5a85fcd1ecb456851d20c65e4c6ce10ab" ], "author": { "name": "Hisashi Hifumi", "email": "hifumi.hisashi@oss.ntt.co.jp", "time": "Tue Oct 16 01:24:52 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:54 2007 -0700" }, "message": "mm: use pagevec to rotate reclaimable page\n\nWhile running some memory intensive load, system response deteriorated just\nafter swap-out started.\n\nThe cause of this problem is that when a PG_reclaim page is moved to the tail\nof the inactive LRU list in rotate_reclaimable_page(), lru_lock spin lock is\nacquired every page writeback . This deteriorates system performance and\nmakes interrupt hold off time longer when swap-out started.\n\nFollowing patch solves this problem. I use pagevec in rotating reclaimable\npages to mitigate LRU spin lock contention and reduce interrupt hold off time.\n\nI did a test that allocating and touching pages in multiple processes, and\npinging to the test machine in flooding mode to measure response under memory\nintensive load.\n\nThe test result is:\n\n\t-2.6.23-rc5\n\t--- testmachine ping statistics ---\n\t3000 packets transmitted, 3000 received, 0% packet loss, time 53222ms\n\trtt min/avg/max/mdev \u003d 0.074/0.652/172.228/7.176 ms, pipe 11, ipg/ewma\n17.746/0.092 ms\n\n\t-2.6.23-rc5-patched\n\t--- testmachine ping statistics ---\n\t3000 packets transmitted, 3000 received, 0% packet loss, time 51924ms\n\trtt min/avg/max/mdev \u003d 0.072/0.108/3.884/0.114 ms, pipe 2, ipg/ewma\n17.314/0.091 ms\n\nMax round-trip-time was improved.\n\nThe test machine spec is that 4CPU(3.16GHz, Hyper-threading enabled)\n8GB memory , 8GB swap.\n\nI did ping test again to observe performance deterioration caused by taking\na ref.\n\n\t-2.6.23-rc6-with-modifiedpatch\n\t--- testmachine ping statistics ---\n\t3000 packets transmitted, 3000 received, 0% packet loss, time 53386ms\n\trtt min/avg/max/mdev \u003d 0.074/0.110/4.716/0.147 ms, pipe 2, ipg/ewma 17.801/0.129 ms\n\nThe result for my original patch is as follows.\n\n\t-2.6.23-rc5-with-originalpatch\n\t--- testmachine ping statistics ---\n\t3000 packets transmitted, 3000 received, 0% packet loss, time 51924ms\n\trtt min/avg/max/mdev \u003d 0.072/0.108/3.884/0.114 ms, pipe 2, ipg/ewma 17.314/0.091 ms\n\nThe influence to response was small.\n\n[akpm@linux-foundation.org: fix uninitalised var warning]\n[hugh@veritas.com: fix locking]\n[randy.dunlap@oracle.com: fix function declaration]\n[hugh@veritas.com: fix BUG at include/linux/mm.h:220!]\n[hugh@veritas.com: kill redundancy in rotate_reclaimable_page]\n[hugh@veritas.com: move_tail_pages into lru_add_drain]\nSigned-off-by: Hisashi Hifumi \u003chifumi.hisashi@oss.ntt.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": "754af6f5a85fcd1ecb456851d20c65e4c6ce10ab", "tree": "8c985bfd704a8c993d6ca992725969c6fc5c9e5a", "parents": [ "32a4330d4156e55a4888a201f484dbafed9504ed" ], "author": { "name": "Lee Schermerhorn", "email": "Lee.Schermerhorn@hp.com", "time": "Tue Oct 16 01:24:51 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:54 2007 -0700" }, "message": "Mem Policy: add MPOL_F_MEMS_ALLOWED get_mempolicy() flag\n\nAllow an application to query the memories allowed by its context.\n\nUpdated numa_memory_policy.txt to mention that applications can use this to\nobtain allowed memories for constructing valid policies.\n\nTODO: update out-of-tree libnuma wrapper[s], or maybe add a new\nwrapper--e.g., numa_get_mems_allowed() ?\n\nAlso, update numa syscall man pages.\n\nTested with memtoy V\u003e\u003d0.13.\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "32a4330d4156e55a4888a201f484dbafed9504ed", "tree": "1339473dab0fe493dc9feb59833cdf23cf2b1780", "parents": [ "8691f3a72f32f8b3ed535faa27140b3ae293c90b" ], "author": { "name": "Rik van Riel", "email": "riel@redhat.com", "time": "Tue Oct 16 01:24:50 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:54 2007 -0700" }, "message": "mm: prevent kswapd from freeing excessive amounts of lowmem\n\nThe current VM can get itself into trouble fairly easily on systems with a\nsmall ZONE_HIGHMEM, which is common on i686 computers with 1GB of memory.\n\nOn one side, page_alloc() will allocate down to zone-\u003epages_low, while on\nthe other side, kswapd() and balance_pgdat() will try to free memory from\nevery zone, until every zone has more free pages than zone-\u003epages_high.\n\nHighmem can be filled up to zone-\u003epages_low with page tables, ramfs,\nvmalloc allocations and other unswappable things quite easily and without\nmany bad side effects, since we still have a huge ZONE_NORMAL to do future\nallocations from.\n\nHowever, as long as the number of free pages in the highmem zone is below\nzone-\u003epages_high, kswapd will continue swapping things out from\nZONE_NORMAL, too!\n\nSami Farin managed to get his system into a stage where kswapd had freed\nabout 700MB of low memory and was still \"going strong\".\n\nThe attached patch will make kswapd stop paging out data from zones when\nthere is more than enough memory free. We do go above zone-\u003epages_high in\norder to keep pressure between zones equal in normal circumstances, but the\npatch should prevent the kind of excesses that made Sami\u0027s computer totally\nunusable.\n\nSigned-off-by: Rik van Riel \u003criel@redhat.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8691f3a72f32f8b3ed535faa27140b3ae293c90b", "tree": "78ed23998e99de2fb4fb5b135c1fa4ad70612ef0", "parents": [ "26fb1589cb0aaec3a0b4418c54f30c1a2b1781f6" ], "author": { "name": "Jesper Juhl", "email": "jesper.juhl@gmail.com", "time": "Tue Oct 16 01:24:49 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:54 2007 -0700" }, "message": "mm: no need to cast vmalloc() return value in zone_wait_table_init()\n\nvmalloc() returns a void pointer, so there\u0027s no need to cast its\nreturn value in mm/page_alloc.c::zone_wait_table_init().\n\nSigned-off-by: Jesper Juhl \u003cjesper.juhl@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ef8b4520bd9f8294ffce9abd6158085bde5dc902", "tree": "c099a16691ac06208f4d3d65b71e7adaf7361fcd", "parents": [ "0da7e01f5f37f441cccd7c8c0586e06db0981907" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Tue Oct 16 01:24:46 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:53 2007 -0700" }, "message": "Slab allocators: fail if ksize is called with a NULL parameter\n\nA NULL pointer means that the object was not allocated. One cannot\ndetermine the size of an object that has not been allocated. Currently we\nreturn 0 but we really should BUG() on attempts to determine the size of\nsomething nonexistent.\n\nkrealloc() interprets NULL to mean a zero sized object. Handle that\nseparately in krealloc().\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nAcked-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Matt Mackall \u003cmpm@selenic.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "0da7e01f5f37f441cccd7c8c0586e06db0981907", "tree": "3d43edc4166667948415de84254bd60cfb457734", "parents": [ "2408c55037c3f7d51a8a100025c47595e71b838c" ], "author": { "name": "Dean Nelson", "email": "dcn@sgi.com", "time": "Tue Oct 16 01:24:45 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:53 2007 -0700" }, "message": "calculation of pgoff in do_linear_fault() uses mixed units\n\nThe calculation of pgoff in do_linear_fault() should use PAGE_SHIFT and not\nPAGE_CACHE_SHIFT since vma-\u003evm_pgoff is in units of PAGE_SIZE and not\nPAGE_CACHE_SIZE. At the moment linux/pagemap.h has PAGE_CACHE_SHIFT\ndefined as PAGE_SHIFT, but should that ever change this calculation would\nbreak.\n\nSigned-off-by: Dean Nelson \u003cdcn@sgi.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": "2408c55037c3f7d51a8a100025c47595e71b838c", "tree": "71940f72dbadf6a6744ffbd062ef4fd8754aa623", "parents": [ "c92ff1bde06f69d59b40f3194016aee51cc5da55" ], "author": { "name": "Satyam Sharma", "email": "satyam@infradead.org", "time": "Tue Oct 16 01:24:44 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:53 2007 -0700" }, "message": "{slub, slob}: use unlikely() for kfree(ZERO_OR_NULL_PTR) check\n\nConsidering kfree(NULL) would normally occur only in error paths and\nkfree(ZERO_SIZE_PTR) is uncommon as well, so let\u0027s use unlikely() for the\ncondition check in SLUB\u0027s and SLOB\u0027s kfree() to optimize for the common\ncase. SLAB has this already.\n\nSigned-off-by: Satyam Sharma \u003csatyam@infradead.org\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\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": "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": "45726cb43d11b288c58243a26010f397054222f0", "tree": "ae1804a34f314be18865add063d660cf783e45be", "parents": [ "001281881067a5998384c6669bc8dbbbab8456c4" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Tue Oct 16 01:24:41 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:53 2007 -0700" }, "message": "mm: improve find_lock_page\n\nfind_lock_page does not need to recheck -\u003eindex because if the page is in the\nright mapping then the index must be the same. Also, tree_lock does not need\nto be retaken after the page is locked in order to test that -\u003emapping has not\nchanged, because holding the page lock pins its mapping.\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": "001281881067a5998384c6669bc8dbbbab8456c4", "tree": "6229d16c737782a36795354b218c74d4d2749752", "parents": [ "557ed1fa2620dc119adb86b34c614e152a629a80" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Tue Oct 16 01:24:40 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:53 2007 -0700" }, "message": "mm: use lockless radix-tree probe\n\nProbing pages and radix_tree_tagged are lockless operations with the lockless\nradix-tree. Convert these users to RCU locking rather than using tree_lock.\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": "557ed1fa2620dc119adb86b34c614e152a629a80", "tree": "d00b31a7f197583c2bd8fffa1fd135fbbb5d6abc", "parents": [ "aadb4bc4a1f9108c1d0fbd121827c936c2ed4217" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Tue Oct 16 01:24:40 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:53 2007 -0700" }, "message": "remove ZERO_PAGE\n\nThe commit b5810039a54e5babf428e9a1e89fc1940fabff11 contains the note\n\n A last caveat: the ZERO_PAGE is now refcounted and managed with rmap\n (and thus mapcounted and count towards shared rss). These writes to\n the struct page could cause excessive cacheline bouncing on big\n systems. There are a number of ways this could be addressed if it is\n an issue.\n\nAnd indeed this cacheline bouncing has shown up on large SGI systems.\nThere was a situation where an Altix system was essentially livelocked\ntearing down ZERO_PAGE pagetables when an HPC app aborted during startup.\nThis situation can be avoided in userspace, but it does highlight the\npotential scalability problem with refcounting ZERO_PAGE, and corner\ncases where it can really hurt (we don\u0027t want the system to livelock!).\n\nThere are several broad ways to fix this problem:\n1. add back some special casing to avoid refcounting ZERO_PAGE\n2. per-node or per-cpu ZERO_PAGES\n3. remove the ZERO_PAGE completely\n\nI will argue for 3. The others should also fix the problem, but they\nresult in more complex code than does 3, with little or no real benefit\nthat I can see.\n\nWhy? Inserting a ZERO_PAGE for anonymous read faults appears to be a\nfalse optimisation: if an application is performance critical, it would\nnot be doing many read faults of new memory, or at least it could be\nexpected to write to that memory soon afterwards. If cache or memory use\nis critical, it should not be working with a significant number of\nZERO_PAGEs anyway (a more compact representation of zeroes should be\nused).\n\nAs a sanity check -- mesuring on my desktop system, there are never many\nmappings to the ZERO_PAGE (eg. 2 or 3), thus memory usage here should not\nincrease much without it.\n\nWhen running a make -j4 kernel compile on my dual core system, there are\nabout 1,000 mappings to the ZERO_PAGE created per second, but about 1,000\nZERO_PAGE COW faults per second (less than 1 ZERO_PAGE mapping per second\nis torn down without being COWed). So removing ZERO_PAGE will save 1,000\npage faults per second when running kbuild, while keeping it only saves\nless than 1 page clearing operation per second. 1 page clear is cheaper\nthan a thousand faults, presumably, so there isn\u0027t an obvious loss.\n\nNeither the logical argument nor these basic tests give a guarantee of no\nregressions. However, this is a reasonable opportunity to try to remove\nthe ZERO_PAGE from the pagefault path. If it is found to cause regressions,\nwe can reintroduce it and just avoid refcounting it.\n\nThe /dev/zero ZERO_PAGE usage and TLB tricks also get nuked. I don\u0027t see\nmuch use to them except on benchmarks. All other users of ZERO_PAGE are\nconverted just to use ZERO_PAGE(0) for simplicity. We can look at\nreplacing them all and maybe ripping out ZERO_PAGE completely when we are\nmore satisfied with this solution.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus \"snif\" Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "aadb4bc4a1f9108c1d0fbd121827c936c2ed4217", "tree": "879b7c9ba11a65958e4477c563602e08d9e6635f", "parents": [ "57f6b96c09c30e444e0d3fc3080feba037657a7b" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Tue Oct 16 01:24:38 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:53 2007 -0700" }, "message": "SLUB: direct pass through of page size or higher kmalloc requests\n\nThis gets rid of all kmalloc caches larger than page size. A kmalloc\nrequest larger than PAGE_SIZE \u003e 2 is going to be passed through to the page\nallocator. This works both inline where we will call __get_free_pages\ninstead of kmem_cache_alloc and in __kmalloc.\n\nkfree is modified to check if the object is in a slab page. If not then\nthe page is freed via the page allocator instead. Roughly similar to what\nSLOB does.\n\nAdvantages:\n- Reduces memory overhead for kmalloc array\n- Large kmalloc operations are faster since they do not\n need to pass through the slab allocator to get to the\n page allocator.\n- Performance increase of 10%-20% on alloc and 50% on free for\n PAGE_SIZEd allocations.\n SLUB must call page allocator for each alloc anyways since\n the higher order pages which that allowed avoiding the page alloc calls\n are not available in a reliable way anymore. So we are basically removing\n useless slab allocator overhead.\n- Large kmallocs yields page aligned object which is what\n SLAB did. Bad things like using page sized kmalloc allocations to\n stand in for page allocate allocs can be transparently handled and are not\n distinguishable from page allocator uses.\n- Checking for too large objects can be removed since\n it is done by the page allocator.\n\nDrawbacks:\n- No accounting for large kmalloc slab allocations anymore\n- No debugging of large kmalloc slab allocations.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "57f6b96c09c30e444e0d3fc3080feba037657a7b", "tree": "4b62e2f63352b74d6c9dd1ed1142b971dcd207e3", "parents": [ "b2c3843b1e25e2c67347c4671f33fbe6f5067e6b" ], "author": { "name": "Fengguang Wu", "email": "wfg@mail.ustc.edu.cn", "time": "Tue Oct 16 01:24:37 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:53 2007 -0700" }, "message": "filemap: convert some unsigned long to pgoff_t\n\nConvert some \u0027unsigned long\u0027 to pgoff_t.\n\nSigned-off-by: Fengguang Wu \u003cwfg@mail.ustc.edu.cn\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b2c3843b1e25e2c67347c4671f33fbe6f5067e6b", "tree": "e1b161e5c7169baab8f71615879eb3b46ebe9a9e", "parents": [ "f2e189827a914b66e435e68b1c9e37775cb995ed" ], "author": { "name": "Fengguang Wu", "email": "wfg@mail.ustc.edu.cn", "time": "Tue Oct 16 01:24:37 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:53 2007 -0700" }, "message": "filemap: trivial code cleanups\n\n- remove unused local next_index in do_generic_mapping_read()\n- remove a redudant page_cache_read() declaration\n\nSigned-off-by: Fengguang Wu \u003cwfg@mail.ustc.edu.cn\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "535443f51543df61111bbd234300ae549d220448", "tree": "e9b022969776132b9fd3bde351673edc006a1bac", "parents": [ "7ff81078d8b9f3d05a27b7bd3786ffb1ef1b0d1f" ], "author": { "name": "Fengguang Wu", "email": "wfg@mail.ustc.edu.cn", "time": "Tue Oct 16 01:24:36 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:52 2007 -0700" }, "message": "readahead: remove several readahead macros\n\nRemove VM_MAX_CACHE_HIT, MAX_RA_PAGES and MIN_RA_PAGES.\n\nSigned-off-by: Fengguang Wu \u003cwfg@mail.ustc.edu.cn\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7ff81078d8b9f3d05a27b7bd3786ffb1ef1b0d1f", "tree": "ac73cf0c8325783a28c4d16c783f6fd96d17be7c", "parents": [ "6b10c6c9fbfe754e8482efb8c8b84f8e40c0f2eb" ], "author": { "name": "Fengguang Wu", "email": "wfg@mail.ustc.edu.cn", "time": "Tue Oct 16 01:24:35 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:52 2007 -0700" }, "message": "readahead: remove the local copy of ra in do_generic_mapping_read()\n\nThe local copy of ra in do_generic_mapping_read() can now go away.\n\nIt predates readanead(req_size). In a time when the readahead code was called\non *every* single page. Hence a local has to be made to reduce the chance of\nthe readahead state being overwritten by a concurrent reader. More details\nin: Linux: Random File I/O Regressions In 2.6\n\u003chttp://kerneltrap.org/node/3039\u003e\n\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nSigned-off-by: Fengguang Wu \u003cwfg@mail.ustc.edu.cn\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6b10c6c9fbfe754e8482efb8c8b84f8e40c0f2eb", "tree": "08f275b1e8d2e9c93bb46367611c43ab88f8f8dc", "parents": [ "6df8ba4f8a4c4abca9ccad10441d0dddbdff301c" ], "author": { "name": "Fengguang Wu", "email": "wfg@mail.ustc.edu.cn", "time": "Tue Oct 16 01:24:34 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:52 2007 -0700" }, "message": "readahead: basic support of interleaved reads\n\nThis is a simplified version of the pagecache context based readahead. It\nhandles the case of multiple threads reading on the same fd and invalidating\neach others\u0027 readahead state. It does the trick by scanning the pagecache and\nrecovering the current read stream\u0027s readahead status.\n\nThe algorithm works in a opportunistic way, in that it does not try to detect\ninterleaved reads _actively_, which requires a probe into the page cache\n(which means a little more overhead for random reads). It only tries to\nhandle a previously started sequential readahead whose state was overwritten\nby another concurrent stream, and it can do this job pretty well.\n\nNegative and positive examples(or what you can expect from it):\n\n1) it cannot detect and serve perfect request-by-request interleaved reads\n right:\n\ttime\tstream 1 stream 2\n\t0 \t1\n\t1 \t 1001\n\t2 \t2\n\t3 \t 1002\n\t4 \t3\n\t5 \t 1003\n\t6 \t4\n\t7 \t 1004\n\t8 \t5\n\t9\t 1005\n\nHere no single readahead will be carried out.\n\n2) However, if it\u0027s two concurrent reads by two threads, the chance of the\n initial sequential readahead be started is huge. Once the first sequential\n readahead is started for a stream, this patch will ensure that the readahead\n window continues to rampup and won\u0027t be disturbed by other streams.\n\n\ttime\tstream 1 stream 2\n\t0 \t1\n\t1 \t2\n\t2 \t 1001\n\t3 \t3\n\t4 \t 1002\n\t5 \t 1003\n\t6 \t4\n\t7 \t5\n\t8 \t 1004\n\t9 \t6\n\t10\t 1005\n\t11\t7\n\t12\t 1006\n\t13\t 1007\n\nHere stream 1 will start a readahead at page 2, and stream 2 will start its\nfirst readahead at page 1003. From then on the two streams will be served\nright.\n\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Fengguang Wu \u003cwfg@mail.ustc.edu.cn\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f4e6b498d6e06742d72706ef50593a9c4dd72214", "tree": "74a573302b2ea086c0d21907175be604f110f5b1", "parents": [ "0bb7ba6b9c358c12084a3cbc6ac08c8d1e973937" ], "author": { "name": "Fengguang Wu", "email": "wfg@mail.ustc.edu.cn", "time": "Tue Oct 16 01:24:33 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:52 2007 -0700" }, "message": "readahead: combine file_ra_state.prev_index/prev_offset into prev_pos\n\nCombine the file_ra_state members\n\t\t\t\tunsigned long prev_index\n\t\t\t\tunsigned int prev_offset\ninto\n\t\t\t\tloff_t prev_pos\n\nIt is more consistent and better supports huge files.\n\nThanks to Peter for the nice proposal!\n\n[akpm@linux-foundation.org: fix shift overflow]\nCc: Peter Zijlstra \u003cpeterz@infradead.org\u003e\nSigned-off-by: Fengguang Wu \u003cwfg@mail.ustc.edu.cn\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "0bb7ba6b9c358c12084a3cbc6ac08c8d1e973937", "tree": "81dc745c660557af4d9ea8b9816846d0395ece20", "parents": [ "937085aa35cc873d427d250a1e304d641af24628" ], "author": { "name": "Fengguang Wu", "email": "wfg@mail.ustc.edu.cn", "time": "Tue Oct 16 01:24:32 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:52 2007 -0700" }, "message": "readahead: mmap read-around simplification\n\nFold file_ra_state.mmap_hit into file_ra_state.mmap_miss and make it an int.\n\nSigned-off-by: Fengguang Wu \u003cwfg@mail.ustc.edu.cn\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "937085aa35cc873d427d250a1e304d641af24628", "tree": "99b0d2d9e6721a72e65b4cb5ad0fc30ec04f4aa2", "parents": [ "43fac94dd62667c83dd2daa5b7ac548512af780a" ], "author": { "name": "Fengguang Wu", "email": "wfg@mail.ustc.edu.cn", "time": "Tue Oct 16 01:24:31 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:52 2007 -0700" }, "message": "readahead: compacting file_ra_state\n\nUse \u0027unsigned int\u0027 instead of \u0027unsigned long\u0027 for readahead sizes.\n\nThis helps reduce memory consumption on 64bit CPU when a lot of files are\nopened.\n\nCC: Andi Kleen \u003candi@firstfloor.org\u003e\nSigned-off-by: Fengguang Wu \u003cwfg@mail.ustc.edu.cn\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "43fac94dd62667c83dd2daa5b7ac548512af780a", "tree": "68b8cf73959afd24410f3f398bda5953c7dcbadd", "parents": [ "39e91e433169bdfd5a312654e5988986662afd7f" ], "author": { "name": "Jesper Juhl", "email": "jesper.juhl@gmail.com", "time": "Tue Oct 16 01:24:30 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:52 2007 -0700" }, "message": "Clean up duplicate includes in mm/\n\nThis patch cleans up duplicate includes in\n\tmm/\n\nSigned-off-by: Jesper Juhl \u003cjesper.juhl@gmail.com\u003e\nAcked-by: Paul Mundt \u003clethal@linux-sh.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1cd7daa51baf0934882bf24a7ae378ec75df665e", "tree": "496ea3e64fc65d01e37f5013b44354ceb8ed3712", "parents": [ "d29eff7bca60c9ee401d691d4562a4abca8de543" ], "author": { "name": "Adrian Bunk", "email": "bunk@stusta.de", "time": "Tue Oct 16 01:24:18 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:51 2007 -0700" }, "message": "slub.c:early_kmem_cache_node_alloc() shouldn\u0027t be __init\n\nWARNING: mm/built-in.o(.text+0x24bd3): Section mismatch: reference to .init.text:early_kmem_cache_node_alloc (between \u0027init_kmem_cache_nodes\u0027 and \u0027calculate_sizes\u0027)\n...\n\nSigned-off-by: Adrian Bunk \u003cbunk@stusta.de\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "29c71111d0557385328211b130246a90f9223b46", "tree": "5588a49ee548d38e15bd7541cec29e069b9e457c", "parents": [ "8f6aac419bd590f535fb110875a51f7db2b62b5b" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Tue Oct 16 01:24:14 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:51 2007 -0700" }, "message": "vmemmap: generify initialisation via helpers\n\nConvert the common vmemmap population into initialisation helpers for use by\narchitecture vmemmap populators. All architecture implementing the\nSPARSEMEM_VMEMMAP variant supply an architecture specific vmemmap_populate()\ninitialiser, which may make use of the helpers.\n\nThis allows us to clean up and remove the initialisation Kconfig entries.\nWith this patch there is a single SPARSEMEM_VMEMMAP_ENABLE Kconfig option to\nindicate use of that variant.\n\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8f6aac419bd590f535fb110875a51f7db2b62b5b", "tree": "64e73e9f7a4b5a68648a2b4b16e66307c3d8d3cf", "parents": [ "540557b9439ec19668553830c90222f9fb0c2e95" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Tue Oct 16 01:24:13 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:51 2007 -0700" }, "message": "Generic Virtual Memmap support for SPARSEMEM\n\nSPARSEMEM is a pretty nice framework that unifies quite a bit of code over all\nthe arches. It would be great if it could be the default so that we can get\nrid of various forms of DISCONTIG and other variations on memory maps. So far\nwhat has hindered this are the additional lookups that SPARSEMEM introduces\nfor virt_to_page and page_address. This goes so far that the code to do this\nhas to be kept in a separate function and cannot be used inline.\n\nThis patch introduces a virtual memmap mode for SPARSEMEM, in which the memmap\nis mapped into a virtually contigious area, only the active sections are\nphysically backed. This allows virt_to_page page_address and cohorts become\nsimple shift/add operations. No page flag fields, no table lookups, nothing\ninvolving memory is required.\n\nThe two key operations pfn_to_page and page_to_page become:\n\n #define __pfn_to_page(pfn) (vmemmap + (pfn))\n #define __page_to_pfn(page) ((page) - vmemmap)\n\nBy having a virtual mapping for the memmap we allow simple access without\nwasting physical memory. As kernel memory is typically already mapped 1:1\nthis introduces no additional overhead. The virtual mapping must be big\nenough to allow a struct page to be allocated and mapped for all valid\nphysical pages. This vill make a virtual memmap difficult to use on 32 bit\nplatforms that support 36 address bits.\n\nHowever, if there is enough virtual space available and the arch already maps\nits 1-1 kernel space using TLBs (f.e. true of IA64 and x86_64) then this\ntechnique makes SPARSEMEM lookups even more efficient than CONFIG_FLATMEM.\nFLATMEM needs to read the contents of the mem_map variable to get the start of\nthe memmap and then add the offset to the required entry. vmemmap is a\nconstant to which we can simply add the offset.\n\nThis patch has the potential to allow us to make SPARSMEM the default (and\neven the only) option for most systems. It should be optimal on UP, SMP and\nNUMA on most platforms. Then we may even be able to remove the other memory\nmodels: FLATMEM, DISCONTIG etc.\n\n[apw@shadowen.org: config cleanups, resplit code etc]\n[kamezawa.hiroyu@jp.fujitsu.com: Fix sparsemem_vmemmap init]\n[apw@shadowen.org: vmemmap: remove excess debugging]\n[apw@shadowen.org: simplify initialisation code and reduce duplication]\n[apw@shadowen.org: pull out the vmemmap code into its own file]\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: \"Luck, Tony\" \u003ctony.luck@intel.com\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "540557b9439ec19668553830c90222f9fb0c2e95", "tree": "07dfa0e88580d4101dbb11ebc59348233e18b2f0", "parents": [ "cd881a6b22902b356cacf8fd2e4e895871068eec" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Tue Oct 16 01:24:11 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:51 2007 -0700" }, "message": "sparsemem: record when a section has a valid mem_map\n\nWe have flags to indicate whether a section actually has a valid mem_map\nassociated with it. This is never set and we rely solely on the present bit\nto indicate a section is valid. By definition a section is not valid if it\nhas no mem_map and there is a window during init where the present bit is set\nbut there is no mem_map, during which pfn_valid() will return true\nincorrectly.\n\nUse the existing SECTION_HAS_MEM_MAP flag to indicate the presence of a valid\nmem_map. Switch valid_section{,_nr} and pfn_valid() to this bit. Add a new\npresent_section{,_nr} and pfn_present() interfaces for those users who care to\nknow that a section is going to be valid.\n\n[akpm@linux-foundation.org: coding-syle fixes]\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: \"Luck, Tony\" \u003ctony.luck@intel.com\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cd881a6b22902b356cacf8fd2e4e895871068eec", "tree": "e26ecdf5ef148b34b1b827ce4da083194c022984", "parents": [ "74a0b5762713a26496db72eac34fbbed46f20fce" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Tue Oct 16 01:24:10 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:42:51 2007 -0700" }, "message": "sparsemem: clean up spelling error in comments\n\nSPARSEMEM is a pretty nice framework that unifies quite a bit of code over all\nthe arches. It would be great if it could be the default so that we can get\nrid of various forms of DISCONTIG and other variations on memory maps. So far\nwhat has hindered this are the additional lookups that SPARSEMEM introduces\nfor virt_to_page and page_address. This goes so far that the code to do this\nhas to be kept in a separate function and cannot be used inline.\n\nThis patch introduces a virtual memmap mode for SPARSEMEM, in which the memmap\nis mapped into a virtually contigious area, only the active sections are\nphysically backed. This allows virt_to_page page_address and cohorts become\nsimple shift/add operations. No page flag fields, no table lookups, nothing\ninvolving memory is required.\n\nThe two key operations pfn_to_page and page_to_page become:\n\n #define __pfn_to_page(pfn) (vmemmap + (pfn))\n #define __page_to_pfn(page) ((page) - vmemmap)\n\nBy having a virtual mapping for the memmap we allow simple access without\nwasting physical memory. As kernel memory is typically already mapped 1:1\nthis introduces no additional overhead. The virtual mapping must be big\nenough to allow a struct page to be allocated and mapped for all valid\nphysical pages. This vill make a virtual memmap difficult to use on 32 bit\nplatforms that support 36 address bits.\n\nHowever, if there is enough virtual space available and the arch already maps\nits 1-1 kernel space using TLBs (f.e. true of IA64 and x86_64) then this\ntechnique makes SPARSEMEM lookups even more efficient than CONFIG_FLATMEM.\nFLATMEM needs to read the contents of the mem_map variable to get the start of\nthe memmap and then add the offset to the required entry. vmemmap is a\nconstant to which we can simply add the offset.\n\nThis patch has the potential to allow us to make SPARSMEM the default (and\neven the only) option for most systems. It should be optimal on UP, SMP and\nNUMA on most platforms. Then we may even be able to remove the other memory\nmodels: FLATMEM, DISCONTIG etc.\n\nThe current aim is to bring a common virtually mapped mem_map to all\narchitectures. This should facilitate the removal of the bespoke\nimplementations from the architectures. This also brings performance\nimprovements for most architecture making sparsmem vmemmap the more desirable\nmemory model. The ultimate aim of this work is to expand sparsemem support to\nencompass all the features of the other memory models. This could allow us to\ndrop support for and remove the other models in the longer term.\n\nBelow are some comparitive kernbench numbers for various architectures,\ncomparing default memory model against SPARSEMEM VMEMMAP. All but ia64 show\nmarginal improvement; we expect the ia64 figures to be sorted out when the\nlarger mapping support returns.\n\nx86-64 non-NUMA\n Base VMEMAP % change (-ve good)\nUser 85.07 84.84 -0.26\nSystem 34.32 33.84 -1.39\nTotal 119.38 118.68 -0.59\n\nia64\n Base VMEMAP % change (-ve good)\nUser 1016.41 1016.93 0.05\nSystem 50.83 51.02 0.36\nTotal 1067.25 1067.95 0.07\n\nx86-64 NUMA\n Base VMEMAP % change (-ve good)\nUser 30.77 431.73 0.22\nSystem 45.39 43.98 -3.11\nTotal 476.17 475.71 -0.10\n\nppc64\n Base VMEMAP % change (-ve good)\nUser 488.77 488.35 -0.09\nSystem 56.92 56.37 -0.97\nTotal 545.69 544.72 -0.18\n\nBelow are some AIM bencharks on IA64 and x86-64 (thank Bob). The seems\npretty much flat as you would expect.\n\nia64 results 2 cpu non-numa 4Gb SCSI disk\n\nBenchmark\tVersion\tMachine\tRun Date\nAIM Multiuser Benchmark - Suite VII\t\"1.1\"\textreme\tJun 1 07:17:24 2007\n\nTasks\tJobs/Min\tJTI\tReal\tCPU\tJobs/sec/task\n1\t98.9\t\t100\t58.9\t1.3\t1.6482\n101\t5547.1\t\t95\t106.0\t79.4\t0.9154\n201\t6377.7\t\t95\t183.4\t158.3\t0.5288\n301\t6932.2\t\t95\t252.7\t237.3\t0.3838\n401\t7075.8\t\t93\t329.8\t316.7\t0.2941\n501\t7235.6\t\t94\t403.0\t396.2\t0.2407\n600\t7387.5\t\t94\t472.7\t475.0\t0.2052\n\nBenchmark\tVersion\tMachine\tRun Date\nAIM Multiuser Benchmark - Suite VII\t\"1.1\"\tvmemmap\tJun 1 09:59:04 2007\n\nTasks\tJobs/Min\tJTI\tReal\tCPU\tJobs/sec/task\n1\t99.1\t\t100\t58.8\t1.2\t1.6509\n101\t5480.9\t\t95\t107.2\t79.2\t0.9044\n201\t6490.3\t\t95\t180.2\t157.8\t0.5382\n301\t6886.6\t\t94\t254.4\t236.8\t0.3813\n401\t7078.2\t\t94\t329.7\t316.0\t0.2942\n501\t7250.3\t\t95\t402.2\t395.4\t0.2412\n600\t7399.1\t\t94\t471.9\t473.9\t0.2055\n\nopen power 710 2 cpu, 4 Gb, SCSI and configured physically\n\nBenchmark\tVersion\tMachine\tRun Date\nAIM Multiuser Benchmark - Suite VII\t\"1.1\"\textreme\tMay 29 15:42:53 2007\n\nTasks\tJobs/Min\tJTI\tReal\tCPU\tJobs/sec/task\n1\t25.7\t\t100\t226.3\t4.3\t0.4286\n101\t1096.0\t\t97\t536.4\t199.8\t0.1809\n201\t1236.4\t\t96\t946.1\t389.1\t0.1025\n301\t1280.5\t\t96\t1368.0\t582.3\t0.0709\n401\t1270.2\t\t95\t1837.4\t771.0\t0.0528\n501\t1251.4\t\t96\t2330.1\t955.9\t0.0416\n601\t1252.6\t\t96\t2792.4\t1139.2\t0.0347\n701\t1245.2\t\t96\t3276.5\t1334.6\t0.0296\n918\t1229.5\t\t96\t4345.4\t1728.7\t0.0223\n\nBenchmark\tVersion\tMachine\tRun Date\nAIM Multiuser Benchmark - Suite VII\t\"1.1\"\tvmemmap\tMay 30 07:28:26 2007\n\nTasks\tJobs/Min\tJTI\tReal\tCPU\tJobs/sec/task\n1\t25.6\t\t100\t226.9\t4.3\t0.4275\n101\t1049.3\t\t97\t560.2\t198.1\t0.1731\n201\t1199.1\t\t97\t975.6\t390.7\t0.0994\n301\t1261.7\t\t96\t1388.5\t591.5\t0.0699\n401\t1256.1\t\t96\t1858.1\t771.9\t0.0522\n501\t1220.1\t\t96\t2389.7\t955.3\t0.0406\n601\t1224.6\t\t96\t2856.3\t1133.4\t0.0340\n701\t1252.0\t\t96\t3258.7\t1314.1\t0.0298\n915\t1232.8\t\t96\t4319.7\t1704.0\t0.0225\n\namd64 2 2-core, 4Gb and SATA\n\nBenchmark\tVersion\tMachine\tRun Date\nAIM Multiuser Benchmark - Suite VII\t\"1.1\"\textreme\tJun 2 03:59:48 2007\n\nTasks\tJobs/Min\tJTI\tReal\tCPU\tJobs/sec/task\n1\t13.0\t\t100\t446.4\t2.1\t0.2173\n101\t533.4\t\t97\t1102.0\t110.2\t0.0880\n201\t578.3\t\t97\t2022.8\t220.8\t0.0480\n301\t583.8\t\t97\t3000.6\t332.3\t0.0323\n401\t580.5\t\t97\t4020.1\t442.2\t0.0241\n501\t574.8\t\t98\t5072.8\t558.8\t0.0191\n600\t566.5\t\t98\t6163.8\t671.0\t0.0157\n\nBenchmark\tVersion\tMachine\tRun Date\nAIM Multiuser Benchmark - Suite VII\t\"1.1\"\tvmemmap\tJun 3 04:19:31 2007\n\nTasks\tJobs/Min\tJTI\tReal\tCPU\tJobs/sec/task\n1\t13.0\t\t100\t447.8\t2.0\t0.2166\n101\t536.5\t\t97\t1095.6\t109.7\t0.0885\n201\t567.7\t\t97\t2060.5\t219.3\t0.0471\n301\t582.1\t\t96\t3009.4\t330.2\t0.0322\n401\t578.2\t\t96\t4036.4\t442.4\t0.0240\n501\t585.1\t\t98\t4983.2\t555.1\t0.0195\n600\t565.5\t\t98\t6175.2\t660.6\t0.0157\n\nThis patch:\n\nFix some spelling errors.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: \"Luck, Tony\" \u003ctony.luck@intel.com\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nCc: Paul Mackerras \u003cpaulus@samba.org\u003e\nCc: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9d966d495c4ac2fcbd010f681425f67141f80bad", "tree": "4df188540aa724b85fff6477e5315fd9ca984061", "parents": [ "411223c01a51163e995dbc2679bf8e963a136a5f" ], "author": { "name": "Al Viro", "email": "viro@ftp.linux.org.uk", "time": "Sun Oct 14 19:34:10 2007 +0100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Sun Oct 14 12:41:51 2007 -0700" }, "message": "mm/migrate.c __user annotation\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6712ecf8f648118c3363c142196418f89a510b90", "tree": "347d39a7d5a7ed96d3b1afecd28de2a0f98b98c9", "parents": [ "5bb23a688b2de23d7765a1dd439d89c038378978" ], "author": { "name": "NeilBrown", "email": "neilb@suse.de", "time": "Thu Sep 27 12:47:43 2007 +0200" }, "committer": { "name": "Jens Axboe", "email": "axboe@carl.home.kernel.dk", "time": "Wed Oct 10 09:25:57 2007 +0200" }, "message": "Drop \u0027size\u0027 argument from bio_endio and bi_end_io\n\nAs bi_end_io is only called once when the reqeust is complete,\nthe \u0027size\u0027 argument is now redundant. Remove it.\n\nNow there is no need for bio_endio to subtract the size completed\nfrom bi_size. So don\u0027t do that either.\n\nWhile we are at it, change bi_end_io to return void.\n\nSigned-off-by: Neil Brown \u003cneilb@suse.de\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "f5ff8422bbdd59f8c1f699df248e1b7a11073027", "tree": "cdd0777acc58c0badd2d0ae66f3efc2f7318e776", "parents": [ "3317fedba9446465082bcc6ce1232451ad1d51ce" ], "author": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Fri Sep 21 09:19:54 2007 +0200" }, "committer": { "name": "Jens Axboe", "email": "axboe@carl.home.kernel.dk", "time": "Wed Oct 10 09:25:57 2007 +0200" }, "message": "Fix warnings with !CONFIG_BLOCK\n\nHide everything in blkdev.h with CONFIG_BLOCK isn\u0027t set, and fixup\nthe (few) files that fail to build because they were relying on blkdev.h\npulling in extra includes for them.\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "745ad48e8cac47beec0b2f72dc3c64424bce1fec", "tree": "a16a8eedb7d6e27eaba86fd0cca8ea7bfd0cdcd8", "parents": [ "dd204d63cd11509081b41d7ab305fdc173382039" ], "author": { "name": "Yan Zheng", "email": "yanzheng@21cn.com", "time": "Mon Oct 08 10:08:37 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Oct 08 12:58:14 2007 -0700" }, "message": "fix page release issue in filemap_fault\n\nfind_lock_page increases page\u0027s usage count, we should decrease it\nbefore return VM_FAULT_SIGBUS\n\nSigned-off-by: Yan Zheng\u003cyanzheng@21cn.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "dd204d63cd11509081b41d7ab305fdc173382039", "tree": "12dcbf4b258de6962b960f4f5fdd46866d7bcdc3", "parents": [ "a200ee182a016752464a12cb2e8762e48254bb09" ], "author": { "name": "Yan Zheng", "email": "yanzheng@21cn.com", "time": "Mon Oct 08 10:05:48 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Oct 08 12:58:14 2007 -0700" }, "message": "fix VM_CAN_NONLINEAR check in sys_remap_file_pages\n\nThe test for VM_CAN_NONLINEAR always fails\n\nSigned-off-by: Yan Zheng\u003cyanzheng@21cn.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a200ee182a016752464a12cb2e8762e48254bb09", "tree": "7b273f002625a4c368f7b20b144990f7f4f81df9", "parents": [ "3eb215de26e6e94bf5fed9cb77230c383b30e53b" ], "author": { "name": "Peter Zijlstra", "email": "peterz@infradead.org", "time": "Mon Oct 08 18:54:37 2007 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Oct 08 12:58:14 2007 -0700" }, "message": "mm: set_page_dirty_balance() vs -\u003epage_mkwrite()\n\nAll the current page_mkwrite() implementations also set the page dirty. Which\nresults in the set_page_dirty_balance() call to _not_ call balance, because the\npage is already found dirty.\n\nThis allows us to dirty a _lot_ of pages without ever hitting\nbalance_dirty_pages(). Not good (tm).\n\nForce a balance call if -\u003epage_mkwrite() was successful.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "67dd5a25f4efbfccf973159429cb20acdc5b0e0e", "tree": "9965b12c0d614b7cf82dd8483cfc1671f925af4e", "parents": [ "9f34073b4e54ad58541e0e2b4a87f4f6c1460e21" ], "author": { "name": "Jeremy Fitzhardinge", "email": "jeremy@goop.org", "time": "Fri Oct 05 17:19:35 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Sat Oct 06 09:31:30 2007 -0700" }, "message": "xen: disable split pte locks for now\n\nWhen pinning and unpinning pagetables, we must protect them against\nbeing used by other CPUs, lest they see the pagetable in an\nintermediate read-only-but-not-pinned state.\n\nWhen using split pte locks, doing this properly would require taking\nall the pte locks for the pagetable while pinning, but this may overflow\nthe PREEMPT_BITS part of the preempt counter if the process has mapped\nmore than about 512M of memory.\n\nHowever, failing to take the pte locks causes write-protect faults when\nthe pageout code is trying to clear the Access bit on a pte which is part\nof a freshy created and still being pinned process after fork.\n\nThis is a short-term fix until the problem is solved properly.\n\nSigned-off-by: Jeremy Fitzhardinge \u003cjeremy@xensource.com\u003e\nAcked-by: Rik van Riel \u003criel@redhat.com\u003e\nAcked-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nCc: Keir Fraser \u003ckeir@xensource.com\u003e\nCc: Jan Beulich \u003cjbeulich@novell.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "16abfa086096895d438b19198e408ee96da7b508", "tree": "1d82091f35f069d7b2a7636b5f488987671bdade", "parents": [ "804b3f9a16e446cb023417faec58b6506c834052" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Thu Oct 04 16:56:06 2007 +0100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Oct 04 10:13:09 2007 -0700" }, "message": "Fix sys_remap_file_pages BUG at highmem.c:15!\n\nGurudas Pai reports kernel BUG at arch/i386/mm/highmem.c:15! below\nsys_remap_file_pages, while running Oracle database test on x86 in 6GB\nRAM: kunmap thinks we\u0027re in_interrupt because the preempt count has\nwrapped.\n\nThat\u0027s because __do_fault expected to unmap page_table, but one of its\ntwo callers do_nonlinear_fault already unmapped it: let do_linear_fault\nunmap it first too, and then there\u0027s no need to pass the page_table arg\ndown.\n\nWhy have we been so slow to notice this? Probably through forgetting\nthat the mapping_cap_account_dirty test means that sys_remap_file_pages\nnowadays only goes the full nonlinear vma route on a few memory-backed\nfilesystems like ramfs, tmpfs and hugetlbfs.\n\n[ It also depends on CONFIG_HIGHPTE, so it becomes even harder to\n trigger in practice. Many who have need of large memory have probably\n migrated to x86-64..\n\n Problem introduced by commit d0217ac04ca6591841e5665f518e38064f4e65bd\n (\"mm: fault feedback #1\") -- Linus ]\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: gurudas pai \u003cgurudas.pai@oracle.com\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "281e0e3b34acb76a157576d27abc85c09fcf78e3", "tree": "136dc7376976685539c132690ff74aea79642737", "parents": [ "8814842fbb6d8907cd23711cc4cbc3a6a191080f" ], "author": { "name": "Ralf Baechle", "email": "ralf@linux-mips.org", "time": "Mon Oct 01 01:20:10 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Oct 01 07:52:23 2007 -0700" }, "message": "hugetlb: fix clear_user_highpage arguments\n\nThe virtual address space argument of clear_user_highpage is supposed to be\nthe virtual address where the page being cleared will eventually be mapped.\n This allows architectures with virtually indexed caches a few clever\ntricks. That sort of trick falls over in painful ways if the virtual\naddress argument is wrong.\n\nSigned-off-by: Ralf Baechle \u003cralf@linux-mips.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "480eccf9ae1073b87bb4fe118971fbf134a5bc61", "tree": "b66cd85cd6ad9dc7c141d34837a848111d036584", "parents": [ "28f300d23674fa01ae747c66ce861d4ee6aebe8c" ], "author": { "name": "Lee Schermerhorn", "email": "Lee.Schermerhorn@hp.com", "time": "Tue Sep 18 22:46:47 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Sep 19 11:24:18 2007 -0700" }, "message": "Fix NUMA Memory Policy Reference Counting\n\nThis patch proposes fixes to the reference counting of memory policy in the\npage allocation paths and in show_numa_map(). Extracted from my \"Memory\nPolicy Cleanups and Enhancements\" series as stand-alone.\n\nShared policy lookup [shmem] has always added a reference to the policy,\nbut this was never unrefed after page allocation or after formatting the\nnuma map data.\n\nDefault system policy should not require additional ref counting, nor\nshould the current task\u0027s task policy. However, show_numa_map() calls\nget_vma_policy() to examine what may be [likely is] another task\u0027s policy.\nThe latter case needs protection against freeing of the policy.\n\nThis patch adds a reference count to a mempolicy returned by\nget_vma_policy() when the policy is a vma policy or another task\u0027s\nmempolicy. Again, shared policy is already reference counted on lookup. A\nmatching \"unref\" [__mpol_free()] is performed in alloc_page_vma() for\nshared and vma policies, and in show_numa_map() for shared and another\ntask\u0027s mempolicy. We can call __mpol_free() directly, saving an admittedly\ninexpensive inline NULL test, because we know we have a non-NULL policy.\n\nHandling policy ref counts for hugepages is a bit trickier.\nhuge_zonelist() returns a zone list that might come from a shared or vma\n\u0027BIND policy. In this case, we should hold the reference until after the\nhuge page allocation in dequeue_hugepage(). The patch modifies\nhuge_zonelist() to return a pointer to the mempolicy if it needs to be\nunref\u0027d after allocation.\n\nKernel Build [16cpu, 32GB, ia64] - average of 10 runs:\n\n\t\tw/o patch\tw/ refcount patch\n\t Avg\t Std Devn\t Avg\t Std Devn\nReal:\t 100.59\t 0.38\t 100.63\t 0.43\nUser:\t1209.60\t 0.37\t1209.91\t 0.31\nSystem: 81.52\t 0.42\t 81.64\t 0.34\n\nSigned-off-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nAcked-by: Andi Kleen \u003cak@suse.de\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ba0268a8b056f2ad846f1f8837a764c21bb6425e", "tree": "93ab7d2555a98628850dbf917a43ceddef8c980c", "parents": [ "4150d3f549fe2355625017b2a6ff72aec98bcef0" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Tue Sep 11 15:24:11 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Sep 11 17:21:27 2007 -0700" }, "message": "SLUB: accurately compare debug flags during slab cache merge\n\nThis was posted on Aug 28 and fixes an issue that could cause troubles\nwhen slab caches \u003e\u003d128k are created.\n\nhttp://marc.info/?l\u003dlinux-mm\u0026m\u003d118798149918424\u0026w\u003d2\n\nCurrently we simply add the debug flags unconditional when checking for a\nmatching slab. This creates issues for sysfs processing when slabs exist\nthat are exempt from debugging due to their huge size or because only a\nsubset of slabs was selected for debugging.\n\nWe need to only add the flags if kmem_cache_open() would also add them.\n\nCreate a function to calculate the flags that would be set\nif the cache would be opened and use that function to determine\nthe flags before looking for a compatible slab.\n\n[akpm@linux-foundation.org: fixlets]\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Chuck Ebbert \u003ccebbert@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": "3b42d28b2a04b3c9830eb865288239d45eccc402", "tree": "776a297ef8bd8a879da74290543907014abe6198", "parents": [ "dec4ad86c2fbea062e9ef9caa6d6e79f7c5e0b12" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Fri Aug 31 00:12:08 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Aug 31 01:42:23 2007 -0700" }, "message": "Page migration: Do not accept invalid nodes in the target nodeset\n\nPage migration currently does not check if the target of the move contains\nnodes that that are invalid (if root attempts to migrate pages)\nand may try to allocate from invalid nodes if these are specified\nleading to oopses.\n\nReturn -EINVAL if an offline node is specified.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Shaohua Li \u003cshaohua.li@intel.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5d540fb71552b9f2c542bea967200c48be2d8ef6", "tree": "af328bd4d12b2b91c6fa53af94a78fcc370562ce", "parents": [ "4ccdb4c8727c9963c7aa0d6301df283cf1f8a731" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Thu Aug 30 23:56:26 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Aug 31 01:42:22 2007 -0700" }, "message": "slub: do not fail if we cannot register a slab with sysfs\n\nDo not BUG() if we cannot register a slab with sysfs. Just print an error.\n The only consequence of not registering is that the slab cache is not\nvisible via /sys/slab. A BUG() may not be visible that early during boot\nand we have had multiple issues here already.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nAcked-by: David S. Miller \u003cdavem@davemloft.net\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "989f89c57e6361e7d16fbd9572b5da7d313b073d", "tree": "cd5f655709e1515568c1e1f309f169723ce3b084", "parents": [ "d1254b12c93e1e586137a2ffef71fd33cf273f35" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Thu Aug 30 23:56:21 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Aug 31 01:42:22 2007 -0700" }, "message": "fix rcu_read_lock() in page migraton\n\nIn migration fallback path, write_page() or lock_page() will be called.\nThis causes sleep with holding rcu_read_lock().\nFor avoding that, just do rcu_lock if the page is Anon.(this is enough.)\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "641916881322a2dee5b120d509a3bdd05a502510", "tree": "79c0b1f449bcf09404ba932b07330a24bce4d00d", "parents": [ "060d11b0b35d13eb2251fd08403d900b71df5791" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Thu Aug 30 23:56:17 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Aug 31 01:42:22 2007 -0700" }, "message": "process_zones(): fix recovery code\n\nDon\u0027t try to free memory which we didn\u0027t allocate.\n\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b377fd3982ad957c796758a90e2988401a884241", "tree": "3d7449ccdf7038bffffa9323873f4095cc1ac6ce", "parents": [ "8e92f21ba3ea3f54e4be062b87ef9fc4af2d33e2" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Wed Aug 22 14:02:05 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Aug 22 19:52:47 2007 -0700" }, "message": "Apply memory policies to top two highest zones when highest zone is ZONE_MOVABLE\n\nThe NUMA layer only supports NUMA policies for the highest zone. When\nZONE_MOVABLE is configured with kernelcore\u003d, the the highest zone becomes\nZONE_MOVABLE. The result is that policies are only applied to allocations\nlike anonymous pages and page cache allocated from ZONE_MOVABLE when the\nzone is used.\n\nThis patch applies policies to the two highest zones when the highest zone\nis ZONE_MOVABLE. As ZONE_MOVABLE consists of pages from the highest \"real\"\nzone, it\u0027s always functionally equivalent.\n\nThe patch has been tested on a variety of machines both NUMA and non-NUMA\ncovering x86, x86_64 and ppc64. No abnormal results were seen in\nkernbench, tbench, dbench or hackbench. It passes regression tests from\nthe numactl package with and without kernelcore\u003d once numactl tests are\npatched to wait for vmstat counters to update.\n\nakpm: this is the nasty hack to fix NUMA mempolicies in the presence of\nZONE_MOVABLE and kernelcore\u003d in 2.6.23. Christoph says \"For .24 either merge\nthe mobility or get the other solution that Mel is working on. That solution\nwould only use a single zonelist per node and filter on the fly. That may\nhelp performance and also help to make memory policies work better.\"\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nTested-by: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nCc: Paul Mundt \u003clethal@linux-sh.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a2f92ee7e704440995cf5474f4cc7b268bf380e0", "tree": "8c51ce70ddf96f0a16eccb85f7883c33e143f34e", "parents": [ "9e86943b6c74f214ce0516d56e55636d52252e19" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Wed Aug 22 14:01:57 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Aug 22 19:52:47 2007 -0700" }, "message": "SLUB: do not fail on broken memory configurations\n\nPrint a big fat warning and do what is necessary to continue if a node is\nmarked as up (meaning either node is online (upstream) or node has memory\n(Andrew\u0027s tree)) but allocations from the node do not succeed.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "9e86943b6c74f214ce0516d56e55636d52252e19", "tree": "f5ba2d57e7a5d5a031f1e6a418e7d5e2c5a838b8", "parents": [ "fe58103a56f05613cb1f0ef228354d4d5f6c2b08" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Wed Aug 22 14:01:56 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Aug 22 19:52:47 2007 -0700" }, "message": "SLUB: use atomic_long_read for atomic_long variables\n\nSLUB is using atomic_read() for variables declared atomic_long_t.\nSwitch to atomic_long_read().\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a89182c76e54134081cfec6409df06731c5cb98f", "tree": "270616c2f6a1ce63a0bbd196a00e267b27e08250", "parents": [ "d4c63b7c74507c424afcc9c80ba77a55bfb0d07e" ], "author": { "name": "Adam Litke", "email": "agl@us.ibm.com", "time": "Wed Aug 22 14:01:51 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Aug 22 19:52:46 2007 -0700" }, "message": "Fix VM_FAULT flags conversion for hugetlb\n\nIt seems a simple mistake was made when converting follow_hugetlb_page()\nover to the VM_FAULT flags bitmasks (in \"mm: fault feedback #2\", commit\n83c54070ee1a2d05c89793884bea1a03f2851ed4).\n\nBy using the wrong bitmask, hugetlb_fault() failures are not being\nrecognized. This results in an infinite loop whenever follow_hugetlb_page\nis involved in a failed fault.\n\nSigned-off-by: Adam Litke \u003cagl@us.ibm.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": "1807a1aaf5f2a35ea6d4b527b28bc8889d255a2f", "tree": "8b07b08bedebc9bc09648fa3443041a03121733f", "parents": [ "32d219854d31daba3407389ada1d454a4cd86fda" ], "author": { "name": "Siddha, Suresh B", "email": "suresh.b.siddha@intel.com", "time": "Wed Aug 22 14:01:49 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Aug 22 19:52:46 2007 -0700" }, "message": "slab: skip calling cache_free_alien() when the platform is not numa capable\n\nSkip calling cache_free_alien() when the platform is not numa capable.\nThis will avoid cache misses that happen while accessing slabp (which is\nper page memory reference) to get nodeid. Instead use a global variable to\nskip the call, which is mostly likely to be present in the cache.\n\nThis gives a 0.8% performance boost with the database oltp workload on a\nquad-core SMP platform and by any means the number is not small :)\n\nSigned-off-by: Suresh Siddha \u003csuresh.b.siddha@intel.com\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "34b4e4aa3c470ce8fa2bd78abb1741b4b58baad7", "tree": "91d620288f1aaf63c12dc84ca1015465818601f2", "parents": [ "afe1ab4d577892822de2c8e803fbfaed6ec44ba3" ], "author": { "name": "Alan Cox", "email": "alan@lxorguk.ukuu.org.uk", "time": "Wed Aug 22 14:01:28 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Aug 22 19:52:45 2007 -0700" }, "message": "fix NULL pointer dereference in __vm_enough_memory()\n\nThe new exec code inserts an accounted vma into an mm struct which is not\ncurrent-\u003emm. The existing memory check code has a hard coded assumption\nthat this does not happen as does the security code.\n\nAs the correct mm is known we pass the mm to the security method and the\nhelper function. A new security test is added for the case where we need\nto pass the mm and the existing one is modified to pass current-\u003emm to\navoid the need to change large amounts of code.\n\n(Thanks to Tobias for fixing rejects and testing)\n\nSigned-off-by: Alan Cox \u003calan@redhat.com\u003e\nCc: WU Fengguang \u003cwfg@mail.ustc.edu.cn\u003e\nCc: James Morris \u003cjmorris@redhat.com\u003e\nCc: Tobias Diedrich \u003cranma+kernel@tdiedrich.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c661b078fd62abe06fd11fab4ac5e4eeafe26b6d", "tree": "f21ffeed682900b783563e7d8a8dde906706cc88", "parents": [ "e9187bdcbbc06090757d565a3077e1b0ecab23d2" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Wed Aug 22 14:01:26 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Aug 22 19:52:45 2007 -0700" }, "message": "synchronous lumpy reclaim: wait for page writeback when directly reclaiming contiguous areas\n\nLumpy reclaim works by selecting a lead page from the LRU list and then\nselecting pages for reclaim from the order-aligned area of pages. In the\nsituation were all pages in that region are inactive and not referenced by any\nprocess over time, it works well.\n\nIn the situation where there is even light load on the system, the pages may\nnot free quickly. Out of a area of 1024 pages, maybe only 950 of them are\nfreed when the allocation attempt occurs because lumpy reclaim returned early.\n This patch alters the behaviour of direct reclaim for large contiguous\nblocks.\n\nThe first attempt to call shrink_page_list() is asynchronous but if it fails,\nthe pages are submitted a second time and the calling process waits for the IO\nto complete. This may stall allocators waiting for contiguous memory but that\nshould be expected behaviour for high-order users. It is preferable behaviour\nto potentially queueing unnecessary areas for IO. Note that kswapd will not\nstall in this fashion.\n\n[apw@shadowen.org: update to version 2]\n[apw@shadowen.org: update to version 3]\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e9187bdcbbc06090757d565a3077e1b0ecab23d2", "tree": "5393cb22c5aef33ec27fa23d633ea088a6066c13", "parents": [ "0cd82ef1fb8909d6d414f36f291c2f67ca70e2be" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Wed Aug 22 14:01:25 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Aug 22 19:52:45 2007 -0700" }, "message": "synchronous lumpy reclaim: ensure we count pages transitioning inactive via clear_active_flags\n\nAs pointed out by Mel when reclaim is applied at higher orders a significant\namount of IO may be started. As this takes finite time to drain reclaim will\nconsider more areas than ultimatly needed to satisfy the request. This leads\nto more reclaim than strictly required and reduced success rates.\n\nI was able to confirm Mel\u0027s test results on systems locally. These show that\neven under light load the success rates drop off far more than expected.\nTesting with a modified version of his patch (which follows) I was able to\nallocate almost all of ZONE_MOVABLE with a near idle system. I ran 5 test\npasses sequentially following system boot (the system has 29 hugepages in\nZONE_MOVABLE):\n\n 2.6.23-rc1 11 8 6 7 7\n sync_lumpy 28 28 29 29 26\n\nThese show that although hugely better than the near 0% success normally\nexpected we can only allocate about a 1/4 of the zone. Using synchronous\nreclaim for these allocations we get close to 100% as expected.\n\nI have also run our standard high order tests and these show no regressions in\nallocation success rates at rest, and some significant improvements under\nload.\n\nThis patch:\n\nWe are transitioning pages from active to inactive in clear_active_flags,\nthose need counting as PGDEACTIVATE vm events.\n\nSigned-off-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "85770ffe4f0cdd4396b17f14762adc25a571a348", "tree": "23f69f720e53cee67632b04c1754c3a7a64dab72", "parents": [ "df068464169a84a6a66c05d140f43a46d5eb6176" ], "author": { "name": "Andy Whitcroft", "email": "apw@shadowen.org", "time": "Wed Aug 22 14:01:03 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Aug 22 19:52:44 2007 -0700" }, "message": "sparsemem: ensure we initialise the node mapping for SPARSEMEM_STATIC\n\nBooting SPARSEMEM on NUMA systems trips a BUG in page_alloc.c:\n\n\tInitializing HighMem for node 0 (00038000:00100000)\n\tInitializing HighMem for node 1 (00100000:001ffe00)\n\t------------[ cut here ]------------\n\tkernel BUG at /home/apw/git/linux-2.6/mm/page_alloc.c:456!\n\t[...]\n\nThis occurs because the section to node id mapping is not being\nsetup correctly during init under SPARSEMEM_STATIC, leading to an\nattempt to free pages from all nodes into the zones on node 0.\n\nWhen the zone_table[] was removed in the following commit, a new\nsection to node mapping table was introduced:\n\n commit 89689ae7f95995723fbcd5c116c47933a3bb8b13\n [PATCH] Get rid of zone_table[]\n\nThat conversion inadvertantly only initialised the node mapping in\nSPARSEMEM_EXTREME. Ensure we initialise the node mapping in\nSPARSEMEM_STATIC.\n\n[akpm@linux-foundation.org: make the stubs static inline]\nSigned-off-by: 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": "dc8a7b11aa68d6795a46e0a42ce92220d1a6f0cd", "tree": "7b353684090d23b1e2e3f85bf83df491f04dcc8a", "parents": [ "d291676ce8bc1d8ef93488023d04027010596de3", "02a5e0acb3cb85d80d0fe834e366d38a92bbaa22" ], "author": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Sat Aug 11 16:01:06 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Sat Aug 11 16:01:06 2007 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.dk/linux-2.6-block\n\n* \u0027for-linus\u0027 of git://git.kernel.dk/linux-2.6-block:\n BLOCK: Hide the contents of linux/bio.h if CONFIG_BLOCK\u003dn\n sysace: HDIO_GETGEO has it\u0027s own method for ages\n drivers/block/cpqarray.c: better error handling and kmalloc + memset conversion to k[cz]alloc\n drivers/block/cciss.c: kmalloc + memset conversion to kzalloc\n Clean up duplicate includes in drivers/block/\n Fix remap handling by blktrace\n [PATCH] remove mm/filemap.c:file_send_actor()\n" }, { "commit": "f0b85c0cfdad8977d82fed88e846fc2245585d0e", "tree": "df85c3195dd46095a40be69647ee5c93911f2e03", "parents": [ "f6901e639800e745457b1dcd99c52647981438d7" ], "author": { "name": "Stephen Hemminger", "email": "shemminger@linux-foundation.org", "time": "Fri Aug 10 13:01:16 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Sat Aug 11 15:47:42 2007 -0700" }, "message": "readahead: docbook fix\n\nMinor docbook error since argument name in comment doesn\u0027t match function\n\nSigned-off-by: Stephen Hemminger \u003cshemminger@linux-foundation.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ec05b297f91a443aa26b74059b573bfad49c9ebb", "tree": "4890ea53de4373e51688e72576781909588515a3", "parents": [ "ac07860264bd2b18834d3fa3be47032115524cea" ], "author": { "name": "Adrian Bunk", "email": "bunk@stusta.de", "time": "Mon Jul 30 08:24:27 2007 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Sat Aug 11 22:34:47 2007 +0200" }, "message": "[PATCH] remove mm/filemap.c:file_send_actor()\n\nThis patch removes the no longer used file_send_actor().\n\nSigned-off-by: Adrian Bunk \u003cbunk@stusta.de\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "1ceef40249f21eceabf8633934d94962e7d8e1d7", "tree": "2b9201a2f7b102d0db7f2790df6f6456fae89e21", "parents": [ "fcda3d89bf1366f6801447eab2d8a75ac5b9c4ce" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Tue Aug 07 15:11:48 2007 -0700" }, "committer": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Thu Aug 09 21:57:16 2007 -0700" }, "message": "SLUB: Fix dynamic dma kmalloc cache creation\n\nThe dynamic dma kmalloc creation can run into trouble if a\nGFP_ATOMIC allocation is the first one performed for a certain size\nof dma kmalloc slab.\n\n- Move the adding of the slab to sysfs into a workqueue\n (sysfs does GFP_KERNEL allocations)\n- Do not call kmem_cache_destroy() (uses slub_lock)\n- Only acquire the slub_lock once and--if we cannot wait--do a trylock.\n\n This introduces a slight risk of the first kmalloc(x, GFP_DMA|GFP_ATOMIC)\n for a range of sizes failing due to another process holding the slub_lock.\n However, we only need to acquire the spinlock once in order to establish\n each power of two DMA kmalloc cache. The possible conflict is with the\n slub_lock taken during slab management actions (create / remove slab cache).\n\n It is rather typical that a driver will first fill its buffers using\n GFP_KERNEL allocations which will wait until the slub_lock can be acquired.\n Drivers will also create its slab caches first outside of an atomic\n context before starting to use atomic kmalloc from an interrupt context.\n\n If there are any failures then they will occur early after boot or when\n loading of multiple drivers concurrently. Drivers can already accomodate\n failures of GFP_ATOMIC for other reasons. Retries will then create the slab.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\n" }, { "commit": "fcda3d89bf1366f6801447eab2d8a75ac5b9c4ce", "tree": "47382ad57b48a1a0e46a6190991f88a9e6973e45", "parents": [ "6adb31c90c47262c8a25bf5097de9b3426caf3ae" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Mon Jul 30 13:06:46 2007 -0700" }, "committer": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Thu Aug 09 21:57:15 2007 -0700" }, "message": "SLUB: Remove checks for MAX_PARTIAL from kmem_cache_shrink\n\nThe MAX_PARTIAL checks were supposed to be an optimization. However, slab\nshrinking is a manually triggered process either through running slabinfo\nor by the kernel calling kmem_cache_shrink.\n\nIf one really wants to shrink a slab then all operations should be done\nregardless of the size of the partial list. This also fixes an issue that\ncould surface if the number of partial slabs was initially above MAX_PARTIAL\nin kmem_cache_shrink and later drops below MAX_PARTIAL through the\nelimination of empty slabs on the partial list (rare). In that case a few\nslabs may be left off the partial list (and only be put back when they\nare empty).\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\n" }, { "commit": "bfe0d6867e36f46836d2c3755fa8b9ef8cf143ba", "tree": "0632dc1fd135324b6e9baf9568ee2cf46cb5765b", "parents": [ "64d158bc3db121fd2bec29057a44843930b044fa" ], "author": { "name": "Randy Dunlap", "email": "randy.dunlap@oracle.com", "time": "Tue Jul 31 00:37:56 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Jul 31 15:39:38 2007 -0700" }, "message": "fix filemap.c kernel-doc\n\nFix kernel-doc warning:\nWarning(linux-2.6.23-rc1-mm1//mm/filemap.c:864): No description found for parameter \u0027ra\u0027\n\nSigned-off-by: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a5e58a61420e99dd08685f622d4dc666bf07e9a5", "tree": "e9dfbeac7648a954c927d2461016e8d0d98cca74", "parents": [ "c8ed39ebe0cf490abd7bf7c77b728dd6fefb2cf8" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Jul 31 00:37:32 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Jul 31 15:39:36 2007 -0700" }, "message": "oom: print points as unsigned long\n\nIn badness(), the automatic variable \u0027points\u0027 is unsigned long. Print it\nas such.\n\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a8bbf72ab9b3072ece630d97689145b1a2f01221", "tree": "4d55318fff1aecd3c5d2c1e877847bcb2347dd2e", "parents": [ "252e48389ed30d7c77385fb92fca765a680de408" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Jul 31 00:37:30 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Jul 31 15:39:36 2007 -0700" }, "message": "Do not trigger OOM-killer for high-order allocation failures\n\nout_of_memory() may be called when an allocation is failing and the direct\nreclaim is not making any progress. This does not take into account the\nrequested order of the allocation. If the request if for an order larger\nthan PAGE_ALLOC_COSTLY_ORDER, it is reasonable to fail the allocation\nbecause the kernel makes no guarantees about those allocations succeeding.\n\nThis false OOM situation can occur if a user is trying to grow the hugepage\npool in a script like;\n\n#!/bin/bash\nREQUIRED\u003d$1\necho 1 \u003e /proc/sys/vm/hugepages_treat_as_movable\necho $REQUIRED \u003e /proc/sys/vm/nr_hugepages\nACTUAL\u003d`cat /proc/sys/vm/nr_hugepages`\nwhile [ $REQUIRED -ne $ACTUAL ]; do\n\techo Huge page pool at $ACTUAL growing to $REQUIRED\n\techo $REQUIRED \u003e /proc/sys/vm/nr_hugepages\n\tACTUAL\u003d`cat /proc/sys/vm/nr_hugepages`\n\tsleep 1\ndone\n\nThis is a reasonable scenario when ZONE_MOVABLE is in use but triggers OOM\neasily on 2.6.23-rc1. This patch will fail an allocation for an order above\nPAGE_ALLOC_COSTLY_ORDER instead of killing processes and retrying.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nCc: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "2208b764c14d0f1ad63da64b1a42db6077b6fe42", "tree": "eb936f9fce478ffd6252e5dd2e6a88540b78a641", "parents": [ "02febdf7f62f2fbfa89ca9dc5d929beea89c96b1" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Thu Jul 26 20:54:34 2007 +0200" }, "committer": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Mon Jul 30 12:15:15 2007 -0700" }, "message": "slub: fix bug in slub debug support\n\nWe ClearSlabDebug() before the last SlabDebug() check. Clear it later.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\n" }, { "commit": "02febdf7f62f2fbfa89ca9dc5d929beea89c96b1", "tree": "8138189066b52f8a4cc4b2ad7b82ce800def8bb9", "parents": [ "9c837fb692b005203765d8a569a2fe43fdff9df1" ], "author": { "name": "Peter Zijlstra", "email": "peterz@infradead.org", "time": "Thu Jul 26 20:01:38 2007 +0200" }, "committer": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Mon Jul 30 12:12:39 2007 -0700" }, "message": "slub: add lock debugging check\n\nIngo noticed that the SLUB code does include the lock debugging free\ncheck.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nAcked-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\n" }, { "commit": "4e950f6f0189f65f8bf069cf2272649ef418f5e4", "tree": "95710bedf2a5aa3b61002f3399e0950192fdd504", "parents": [ "673d5b43daa00b42759cecc6b0760b8bf6be80d2" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Mon Jul 30 02:36:13 2007 +0400" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Sun Jul 29 17:09:29 2007 -0700" }, "message": "Remove fs.h from mm.h\n\nRemove fs.h from mm.h. For this,\n 1) Uninline vma_wants_writenotify(). It\u0027s pretty huge anyway.\n 2) Add back fs.h or less bloated headers (err.h) to files that need it.\n\nAs result, on x86_64 allyesconfig, fs.h dependencies cut down from 3929 files\nrebuilt down to 3444 (-12.3%).\n\nCross-compile tested without regressions on my two usual configs and (sigh):\n\nalpha arm-mx1ads mips-bigsur powerpc-ebony\nalpha-allnoconfig arm-neponset mips-capcella powerpc-g5\nalpha-defconfig arm-netwinder mips-cobalt powerpc-holly\nalpha-up arm-netx mips-db1000 powerpc-iseries\narm arm-ns9xxx mips-db1100 powerpc-linkstation\narm-assabet arm-omap_h2_1610 mips-db1200 powerpc-lite5200\narm-at91rm9200dk arm-onearm mips-db1500 powerpc-maple\narm-at91rm9200ek arm-picotux200 mips-db1550 powerpc-mpc7448_hpc2\narm-at91sam9260ek arm-pleb mips-ddb5477 powerpc-mpc8272_ads\narm-at91sam9261ek arm-pnx4008 mips-decstation powerpc-mpc8313_rdb\narm-at91sam9263ek arm-pxa255-idp mips-e55 powerpc-mpc832x_mds\narm-at91sam9rlek arm-realview mips-emma2rh powerpc-mpc832x_rdb\narm-ateb9200 arm-realview-smp mips-excite powerpc-mpc834x_itx\narm-badge4 arm-rpc mips-fulong powerpc-mpc834x_itxgp\narm-carmeva arm-s3c2410 mips-ip22 powerpc-mpc834x_mds\narm-cerfcube arm-shannon mips-ip27 powerpc-mpc836x_mds\narm-clps7500 arm-shark mips-ip32 powerpc-mpc8540_ads\narm-collie arm-simpad mips-jazz powerpc-mpc8544_ds\narm-corgi arm-spitz mips-jmr3927 powerpc-mpc8560_ads\narm-csb337 arm-trizeps4 mips-malta powerpc-mpc8568mds\narm-csb637 arm-versatile mips-mipssim powerpc-mpc85xx_cds\narm-ebsa110 i386 mips-mpc30x powerpc-mpc8641_hpcn\narm-edb7211 i386-allnoconfig mips-msp71xx powerpc-mpc866_ads\narm-em_x270 i386-defconfig mips-ocelot powerpc-mpc885_ads\narm-ep93xx i386-up mips-pb1100 powerpc-pasemi\narm-footbridge ia64 mips-pb1500 powerpc-pmac32\narm-fortunet ia64-allnoconfig mips-pb1550 powerpc-ppc64\narm-h3600 ia64-bigsur mips-pnx8550-jbs powerpc-prpmc2800\narm-h7201 ia64-defconfig mips-pnx8550-stb810 powerpc-ps3\narm-h7202 ia64-gensparse mips-qemu powerpc-pseries\narm-hackkit ia64-sim mips-rbhma4200 powerpc-up\narm-integrator ia64-sn2 mips-rbhma4500 s390\narm-iop13xx ia64-tiger mips-rm200 s390-allnoconfig\narm-iop32x ia64-up mips-sb1250-swarm s390-defconfig\narm-iop33x ia64-zx1 mips-sead s390-up\narm-ixp2000 m68k mips-tb0219 sparc\narm-ixp23xx m68k-amiga mips-tb0226 sparc-allnoconfig\narm-ixp4xx m68k-apollo mips-tb0287 sparc-defconfig\narm-jornada720 m68k-atari mips-workpad sparc-up\narm-kafa m68k-bvme6000 mips-wrppmc sparc64\narm-kb9202 m68k-hp300 mips-yosemite sparc64-allnoconfig\narm-ks8695 m68k-mac parisc sparc64-defconfig\narm-lart m68k-mvme147 parisc-allnoconfig sparc64-up\narm-lpd270 m68k-mvme16x parisc-defconfig um-x86_64\narm-lpd7a400 m68k-q40 parisc-up x86_64\narm-lpd7a404 m68k-sun3 powerpc x86_64-allnoconfig\narm-lubbock m68k-sun3x powerpc-cell x86_64-defconfig\narm-lusl7200 mips powerpc-celleb x86_64-up\narm-mainstone mips-atlas powerpc-chrp32\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "296699de6bdc717189a331ab6bbe90e05c94db06", "tree": "53c847ecc8cce11952502921844052e44ca60d5e", "parents": [ "b0cb1a19d05b8ea8611a9ef48a17fe417f1832e6" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Sun Jul 29 23:27:18 2007 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Sun Jul 29 16:45:38 2007 -0700" }, "message": "Introduce CONFIG_SUSPEND for suspend-to-Ram and standby\n\nIntroduce CONFIG_SUSPEND representing the ability to enter system sleep\nstates, such as the ACPI S3 state, and allow the user to choose SUSPEND\nand HIBERNATION independently of each other.\n\nMake HOTPLUG_CPU be selected automatically if SUSPEND or HIBERNATION has\nbeen chosen and the kernel is intended for SMP systems.\n\nAlso, introduce CONFIG_PM_SLEEP which is automatically selected if\nCONFIG_SUSPEND or CONFIG_HIBERNATION is set and use it to select the\ncode needed for both suspend and hibernation.\n\nThe top-level power management headers and the ACPI code related to\nsuspend and hibernation are modified to use the new definitions (the\nchanges in drivers/acpi/sleep/main.c are, mostly, moving code to reduce\nthe number of ifdefs).\n\nThere are many other files in which CONFIG_PM can be replaced with\nCONFIG_PM_SLEEP or even with CONFIG_SUSPEND, but they can be updated in\nthe future.\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b0cb1a19d05b8ea8611a9ef48a17fe417f1832e6", "tree": "895fe53e8dc4fc59d05b963ac079f6ff759ad0fb", "parents": [ "6c8dca5d53f95009d4fff00195bf38f277dc4366" ], "author": { "name": "Rafael J. Wysocki", "email": "rjw@sisk.pl", "time": "Sun Jul 29 23:24:36 2007 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Sun Jul 29 16:45:38 2007 -0700" }, "message": "Replace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBERNATION\n\nReplace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBERNATION to avoid\nconfusion (among other things, with CONFIG_SUSPEND introduced in the\nnext patch).\n\nSigned-off-by: Rafael J. Wysocki \u003crjw@sisk.pl\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b5445f956ec3c8c19b760775e9ff92a160e3a167", "tree": "034d62678f1e402e6d71b07ba0bf96544554a2ba", "parents": [ "ee2077d97b2f392cfc0b884775ac58aa9b9b8c8f" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Thu Jul 26 10:41:18 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 26 11:35:19 2007 -0700" }, "message": "Allow nodes to exist that only contain ZONE_MOVABLE\n\nWith the introduction of kernelcore\u003d, a configurable zone is created on\nrequest. In some cases, this value will be small enough that some nodes\ncontain only ZONE_MOVABLE. On some NUMA configurations when this occurs,\narch-independent zone-sizing will get the size of the memory holes within\nthe node incorrect. The value of present_pages goes negative and the boot\nfails.\n\nThis patch fixes the bug in the calculation of the size of the hole. The\ntest case is to boot test a NUMA machine with a low value of kernelcore\u003d\nbefore and after the patch is applied. While this bug exists in early\nkernel it cannot be triggered in practice.\n\nThis patch has been boot-tested on a variety machines with and without\nkernelcore\u003d set.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3dd9fe8c397df68086e6a1b2160573abbe944813", "tree": "86dda41ade146e2a403151c7ba2f7e32a930bc63", "parents": [ "dc386d4d1e98bb39fb967ee156cd456c802fc692" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Thu Jul 26 10:41:08 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 26 11:35:17 2007 -0700" }, "message": "memory unplug: isolate_lru_page fix\n\nrelease_pages() in mm/swap.c changes page_count() to be 0 without removing\nPageLRU flag...\n\nThis means isolate_lru_page() can see a page, PageLRU() \u0026\u0026\npage_count(page)\u003d\u003d0.. This is BUG. (get_page() will be called against\ncount\u003d0 page.)\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "dc386d4d1e98bb39fb967ee156cd456c802fc692", "tree": "ddd26eb0f08611a84157e4f8e1537a5127b96ea0", "parents": [ "098284020c47c1212d211e39ae2b41c21182e056" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Thu Jul 26 10:41:07 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 26 11:35:17 2007 -0700" }, "message": "memory unplug: migration by kernel\n\nIn usual, migrate_pages(page,,) is called with holding mm-\u003esem by system call.\n(mm here is a mm_struct which maps the migration target page.)\nThis semaphore helps avoiding some race conditions.\n\nBut, if we want to migrate a page by some kernel codes, we have to avoid\nsome races. This patch adds check code for following race condition.\n\n1. A page which page-\u003emapping\u003d\u003dNULL can be target of migration. Then, we have\n to check page-\u003emapping before calling try_to_unmap().\n\n2. anon_vma can be freed while page is unmapped, but page-\u003emapping remains as\n it was. We drop page-\u003emapcount to be 0. Then we cannot trust page-\u003emapping.\n So, use rcu_read_lock() to prevent anon_vma pointed by page-\u003emapping from\n being freed during migration.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b2e961eb2e7a54ffaae82f8e0198b26b54ade98e", "tree": "33e5192a4c84e717d8c2f8235f268216b01053f7", "parents": [ "b8c1c5da1520977cb55a358f20fc09567d40cad9", "71f65e6bd7651610d2d6aeb3c12aab63667ace30" ], "author": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Jul 24 12:26:44 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Jul 24 12:26:44 2007 -0700" }, "message": "Merge branch \u0027request-queue-t\u0027 of git://git.kernel.dk/linux-2.6-block\n\n* \u0027request-queue-t\u0027 of git://git.kernel.dk/linux-2.6-block:\n [BLOCK] Add request_queue_t and mark it deprecated\n [BLOCK] Get rid of request_queue_t typedef\n" }, { "commit": "b8c1c5da1520977cb55a358f20fc09567d40cad9", "tree": "c762e6ad77297beed0978337ce2f5b0c50add739", "parents": [ "01e457cfcd5b6b6f18d0bb8cec0c5d43df56557e" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Tue Jul 24 12:02:40 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Jul 24 12:24:59 2007 -0700" }, "message": "slab: correctly handle __GFP_ZERO\n\nUse the correct local variable when calling into the page allocator. Local\n`flags\u0027 can have __GFP_ZERO set, which causes us to pass __GFP_ZERO into the\npage allocator, possibly from illegal contexts. The page allocator will later\ndo prep_zero_page()-\u003ekmap_atomic(..., KM_USER0) from irq contexts and will\nthen go BUG.\n\nCc: Mike Galbraith \u003cefault@gmx.de\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5ab3ee7b1cd5c91eb2272764f9d7d1fe4749681e", "tree": "82c1fbc5e3a41651d4c0d45cf13d85760708c184", "parents": [ "be1ff386e768ee4fc19bb7da48cee4fc4cb4e75b" ], "author": { "name": "Ken Chen", "email": "kenchen@google.com", "time": "Mon Jul 23 18:44:00 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Jul 24 12:24:59 2007 -0700" }, "message": "fix hugetlb page allocation leak\n\ndequeue_huge_page() has a serious memory leak upon hugetlb page\nallocation. The for loop continues on allocating hugetlb pages out of\nall allowable zone, where this function is supposedly only dequeue one\nand only one pages.\n\nFixed it by breaking out of the for loop once a hugetlb page is found.\n\nSigned-off-by: Ken Chen \u003ckenchen@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": "165125e1e480f9510a5ffcfbfee4e3ee38c05f23", "tree": "8009c8a5ff09e26dc2418d42f66ecafb055c52a2", "parents": [ "f695baf2df9e0413d3521661070103711545207a" ], "author": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Tue Jul 24 09:28:11 2007 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Tue Jul 24 09:28:11 2007 +0200" }, "message": "[BLOCK] Get rid of request_queue_t typedef\n\nSome of the code has been gradually transitioned to using the proper\nstruct request_queue, but there\u0027s lots left. So do a full sweet of\nthe kernel and get rid of this typedef and replace its uses with\nthe proper type.\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "dec2e6b7aa5d45bc3508e19907a7716b0c5307e5", "tree": "6214a1061268c805aded57413e98544456f175ab", "parents": [ "7aa6ec56b9e9e95eb6c83516ddbb6159fd11c224" ], "author": { "name": "Sam Ravnborg", "email": "sam@ravnborg.org", "time": "Sun Jul 22 11:12:44 2007 +0200" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Sun Jul 22 11:03:38 2007 -0700" }, "message": "x86_64: fix section mismatch warning in init.c\n\nFix following warning:\nWARNING: vmlinux.o(.text+0x188ea): Section mismatch: reference to .init.text:__alloc_bootmem_core (between \u0027alloc_bootmem_high_node\u0027 and \u0027get_gate_vma\u0027)\n\nalloc_bootmem_high_node() is only used from __init scope so declare it __init.\nAnd in addition declare the weak variant __init too.\n\nSigned-off-by: Sam Ravnborg \u003csam@ravnborg.org\u003e\nSigned-off-by: Andi Kleen \u003cak@suse.de\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d6269543ef24aa012aa228c27af3adb074f7b36b", "tree": "5e0c24ce1dd5ed3947ea00b7863782e24848b8d3", "parents": [ "41f9dc5c871600f53c8912b2975971d2a11c1c25" ], "author": { "name": "Matt Mackall", "email": "mpm@selenic.com", "time": "Sat Jul 21 04:37:40 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Sat Jul 21 17:49:16 2007 -0700" }, "message": "slob: reduce list scanning\n\nThe version of SLOB in -mm always scans its free list from the beginning,\nwhich results in small allocations and free segments clustering at the\nbeginning of the list over time. This causes the average search to scan\nover a large stretch at the beginning on each allocation.\n\nBy starting each page search where the last one left off, we evenly\ndistribute the allocations and greatly shorten the average search.\n\nWithout this patch, kernel compiles on a 1.5G machine take a large amount\nof system time for list scanning. With this patch, compiles are within a\nfew seconds of performance of a SLAB kernel with no notable change in\nsystem time.\n\nSigned-off-by: Matt Mackall \u003cmpm@selenic.com\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "41f9dc5c871600f53c8912b2975971d2a11c1c25", "tree": "c87833f1e6ffd73bc99ad7c83fffbd3cd47a64ca", "parents": [ "61d488da9bad8d1511d18291006bd2dd728f173d" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Sat Jul 21 04:37:40 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Sat Jul 21 17:49:16 2007 -0700" }, "message": "remove handle_mm_fault export\n\nNow that arch/powerpc/platforms/cell/spufs/fault.c is always built in\nthe kernel there is no need to export handle_mm_fault anymore.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b50731732f926d6c49fd0724616a7344c31cd5cf", "tree": "2bc72fc6bf200b3696666ff1ef21f7e60a379d35", "parents": [ "df336d1c7b6fd510fa6d3a028f999e7586c7026e" ], "author": { "name": "Paul Mundt", "email": "lethal@linux-sh.org", "time": "Sat Jul 21 04:37:25 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Sat Jul 21 17:49:14 2007 -0700" }, "message": "nommu: vmalloc_32_user()/vm_insert_page() and symbol exports.\n\nTrying to survive an allmodconfig on a nommu platform results in many\nscreen lengths of module unhappiness. Many of the mmap related things that\nbinfmt_flat hooks in to are never exported despite being global, and there\nare also missing definitions for vmalloc_32_user() and vm_insert_page().\n\nI\u0027ve implemented vmalloc_32_user() trying to stick as close to the\nmm/vmalloc.c implementation as possible, though we don\u0027t have any need for\nVM_USERMAP, so groveling for the VMA can be skipped. vm_insert_page() has\nbeen stubbed for now in order to keep the build happy.\n\nSigned-off-by: Paul Mundt \u003clethal@linux-sh.org\u003e\nCc: David Howells \u003cdhowells@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e228929bc257b963523ed75aa60d2ad77ece2189", "tree": "d72cf8e6d8a126792565549527efc2c9a6fcdcbe", "parents": [ "8d1b87530e7df5c9541a69910ef7f786f034eca0" ], "author": { "name": "Paul Mundt", "email": "lethal@linux-sh.org", "time": "Fri Jul 20 00:31:44 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Jul 20 08:44:19 2007 -0700" }, "message": "mm: fix memory hotplug oops from ZONE_MOVABLE changes.\n\nzone_movable_pfn is presently marked as __initdata and referenced from\nadjust_zone_range_for_zone_movable(), which in turn is referenced by\nzone_spanned_pages_in_node(). Both of these are __meminit annotated. When\nmemory hotplug is enabled, this will oops on a hot-add, due to\nzone_movable_pfn having been freed.\n\n__meminitdata annotation gives the desired behaviour.\n\nThis will only impact platforms that enable both memory hotplug\nand ARCH_POPULATES_NODE_MAP.\n\nSigned-off-by: Paul Mundt \u003clethal@linux-sh.org\u003e\nAcked-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-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": "20c2df83d25c6a95affe6157a4c9cac4cf5ffaac", "tree": "415c4453d2b17a50abe7a3e515177e1fa337bd67", "parents": [ "64fb98fc40738ae1a98bcea9ca3145b89fb71524" ], "author": { "name": "Paul Mundt", "email": "lethal@linux-sh.org", "time": "Fri Jul 20 10:11:58 2007 +0900" }, "committer": { "name": "Paul Mundt", "email": "lethal@linux-sh.org", "time": "Fri Jul 20 10:11:58 2007 +0900" }, "message": "mm: Remove slab destructors from kmem_cache_create().\n\nSlab destructors were no longer supported after Christoph\u0027s\nc59def9f222d44bb7e2f0a559f2906191a0862d7 change. They\u0027ve been\nBUGs for both slab and slub, and slob never supported them\neither.\n\nThis rips out support for the dtor pointer from kmem_cache_create()\ncompletely and fixes up every single callsite in the kernel (there were\nabout 224, not including the slab allocator definitions themselves,\nor the documentation references).\n\nSigned-off-by: Paul Mundt \u003clethal@linux-sh.org\u003e\n" }, { "commit": "9550b105b8646f916862aee3ab7b25020ca14159", "tree": "d5e57db2bfd773611e2b77b4bbe6d89ba8449b45", "parents": [ "a5c96d8a1c67f31ef48935a78da2d2076513842b" ], "author": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 13:21:34 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 13:21:34 2007 -0700" }, "message": "slub: fix ksize() for zero-sized pointers\n\nThe slab and slob allocators already did this right, but slub would call\n\"get_object_page()\" on the magic ZERO_SIZE_PTR, with all kinds of nasty\nend results.\n\nNoted by Ingo Molnar.\n\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a5c96d8a1c67f31ef48935a78da2d2076513842b", "tree": "d164c6b33a1de9ea157b99bb353f84e41774164e", "parents": [ "ce8c2293be47999584908069e78bf6d94beadc53" ], "author": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 13:17:15 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 13:17:15 2007 -0700" }, "message": "Fix up non-NUMA SLAB configuration for zero-sized allocations\n\nI suspect Christoph tested his code only in the NUMA configuration, for\nthe combination of SLAB+non-NUMA the zero-sized kmalloc\u0027s would not work.\n\nOf course, this would only trigger in configurations where those zero-\nsized allocations happen (not very common), so that may explain why it\nwasn\u0027t more widely noticed.\n\nSeen by by Andi Kleen under qemu, and there seems to be a report by\nMichael Tsirkin on it too.\n\nCc: Andi Kleen \u003cak@suse.de\u003e\nCc: Roland Dreier \u003crdreier@cisco.com\u003e\nCc: Michael S. Tsirkin \u003cmst@dev.mellanox.co.il\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5992b6dac0d23a2b51a1ccbaf8f1a2e62097b12b", "tree": "47b059a9f22d6d0111c669d808617aa73a709259", "parents": [ "57deb52622f3700d154e32662f36cd5f4053f6ed" ], "author": { "name": "Rusty Russell", "email": "rusty@rustcorp.com.au", "time": "Thu Jul 19 01:49:21 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 10:04:52 2007 -0700" }, "message": "lguest: export symbols for lguest as a module\n\nlguest does some fairly lowlevel things to support a host, which\nnormal modules don\u0027t need:\n\nmath_state_restore:\n\tWhen the guest triggers a Device Not Available fault, we need\n\tto be able to restore the FPU\n\n__put_task_struct:\n\tWe need to hold a reference to another task for inter-guest\n\tI/O, and put_task_struct() is an inline function which calls\n\t__put_task_struct.\n\naccess_process_vm:\n\tWe need to access another task for inter-guest I/O.\n\nmap_vm_area \u0026 __get_vm_area:\n\tWe need to map the switcher shim (ie. monitor) at 0xFFC01000.\n\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d688abf50bd5a30d2c44dea2a72dd59052cd3cce", "tree": "2f572d18af05969b2c882970cda4860be345bdfc", "parents": [ "6819457d2cb7fe4fdb0fc3655b6b6dc71a86bee9" ], "author": { "name": "Andrew Morton", "email": "akpm@osdl.org", "time": "Thu Jul 19 01:49:17 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 10:04:52 2007 -0700" }, "message": "move page writeback acounting out of macros\n\npage-writeback accounting is presently performed in the page-flags macros.\nThis is inconsistent and a bit ugly and makes it awkward to implement\nper-backing_dev under-writeback page accounting.\n\nSo move this accounting down to the callsite(s).\n\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": "f8af0bb890d6cdcb09ec042c128e217a7c500355", "tree": "c74f53e64b74162488b7ca3f5199acf7f5b6e501", "parents": [ "7ed5cb2b73d0c4165c0504c95454fade0c0bf3d9" ], "author": { "name": "Akinobu Mita", "email": "akinobu.mita@gmail.com", "time": "Thu Jul 19 01:49:12 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 10:04:50 2007 -0700" }, "message": "hugetlb: use set_compound_page_dtor\n\nUse appropriate accessor function to set compound page destructor\nfunction.\n\nCc: William Irwin \u003cwli@holomorphy.com\u003e\nSigned-off-by: Akinobu Mita \u003cakinobu.mita@gmail.com\u003e\nAcked-by: Adam Litke \u003cagl@us.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": "7ed5cb2b73d0c4165c0504c95454fade0c0bf3d9", "tree": "37b15b57986466531c5a0debb6b52660ca47e86a", "parents": [ "e3aded3cc289113c7bc729ef4cb75e56d9aa71be" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Thu Jul 19 01:49:11 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 10:04:50 2007 -0700" }, "message": "Remove nid_lock from alloc_fresh_huge_page\n\nThe fix to that race in alloc_fresh_huge_page() which could give an illegal\nnode ID did not need nid_lock at all: the fix was to replace static int nid\nby static int prev_nid and do the work on local int nid. nid_lock did make\nsure that racers strictly roundrobin the nodes, but that\u0027s not something we\nneed to enforce strictly. Kill nid_lock.\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": "7ac674f52778b95450509357435320be1d795248", "tree": "93657e44d8d7ba7f8857ba038074e2ec4a9c2d38", "parents": [ "ea02e3dde3509ffa7fda7f8de9c8a366e03f7bbd" ], "author": { "name": "Benjamin Herrenschmidt", "email": "benh@kernel.crashing.org", "time": "Thu Jul 19 01:49:10 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 10:04:50 2007 -0700" }, "message": "vmalloc_32 should use GFP_KERNEL\n\nI\u0027ve noticed lots of failures of vmalloc_32 on machines where it\nshouldn\u0027t have failed unless it was doing an atomic operation.\n\nLooking closely, I noticed that:\n\n#if defined(CONFIG_64BIT) \u0026\u0026 defined(CONFIG_ZONE_DMA32)\n#define GFP_VMALLOC32 GFP_DMA32\n#elif defined(CONFIG_64BIT) \u0026\u0026 defined(CONFIG_ZONE_DMA)\n#define GFP_VMALLOC32 GFP_DMA\n#else\n#define GFP_VMALLOC32 GFP_KERNEL\n#endif\n\nWhich seems to be incorrect, it should always -or- in the DMA flags\non top of GFP_KERNEL, thus this patch.\n\nThis fixes frequent errors launchin X with the nouveau DRM for example.\n\nSigned-off-by: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nCc: Dave Airlie \u003cairlied@linux.ie\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ea02e3dde3509ffa7fda7f8de9c8a366e03f7bbd", "tree": "0c48aa948de8549a2b183c2ed3e5b338fa9730b7", "parents": [ "3abf7afd406866a84276d3ed04f4edf6070c9cb5" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Thu Jul 19 01:49:09 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 10:04:50 2007 -0700" }, "message": "FRV: work around a possible compiler bug\n\nWork around a possible bug in the FRV compiler.\n\nWhat appears to be happening is that gcc resolves the\n__builtin_constant_p() in kmalloc() to true, but then fails to reduce the\ntherefore constant conditions in the if-statements it guards to constant\nresults.\n\nWhen compiling with -O2 or -Os, one single spurious error crops up in\ncpuup_callback() in mm/slab.c. This can be avoided by making the memsize\nvariable const.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3abf7afd406866a84276d3ed04f4edf6070c9cb5", "tree": "4ee66f7d1a12261cbc7139b99b4fa94a8ecab122", "parents": [ "dd00cc486ab1c17049a535413d1751ef3482141c" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Thu Jul 19 01:49:08 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 10:04:50 2007 -0700" }, "message": "dequeue_huge_page() warning fix\n\nmm/hugetlb.c: In function `dequeue_huge_page\u0027:\nmm/hugetlb.c:72: warning: \u0027nid\u0027 might be used uninitialized in this function\n\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Adam Litke \u003cagl@us.ibm.com\u003e\nCc: David Gibson \u003chermes@gibson.dropbear.id.au\u003e\nCc: William Lee Irwin III \u003cwli@holomorphy.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b6a2fea39318e43fee84fa7b0b90d68bed92d2ba", "tree": "c9c3619cb2730b5c10c7427b837146bce3d69156", "parents": [ "bdf4c48af20a3b0f01671799ace345e3d49576da" ], "author": { "name": "Ollie Wild", "email": "aaw@google.com", "time": "Thu Jul 19 01:48:16 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 10:04:45 2007 -0700" }, "message": "mm: variable length argument support\n\nRemove the arg+env limit of MAX_ARG_PAGES by copying the strings directly from\nthe old mm into the new mm.\n\nWe create the new mm before the binfmt code runs, and place the new stack at\nthe very top of the address space. Once the binfmt code runs and figures out\nwhere the stack should be, we move it downwards.\n\nIt is a bit peculiar in that we have one task with two mm\u0027s, one of which is\ninactive.\n\n[a.p.zijlstra@chello.nl: limit stack size]\nSigned-off-by: Ollie Wild \u003caaw@google.com\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: \u003clinux-arch@vger.kernel.org\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\n[bunk@stusta.de: unexport bprm_mm_init]\nSigned-off-by: Adrian Bunk \u003cbunk@stusta.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f9acc8c7b35a100f3a9e0e6977f7807b0169f9a5", "tree": "6a4dcd227bb698a217a1d42d37e3f0135a444ea4", "parents": [ "cf914a7d656e62b9dd3e0dffe4f62b953ae6048d" ], "author": { "name": "Fengguang Wu", "email": "wfg@mail.ustc.edu.cn", "time": "Thu Jul 19 01:48:08 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 10:04:44 2007 -0700" }, "message": "readahead: sanify file_ra_state names\n\nRename some file_ra_state variables and remove some accessors.\n\nIt results in much simpler code.\nKudos to Rusty!\n\nSigned-off-by: Fengguang Wu \u003cwfg@mail.ustc.edu.cn\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cf914a7d656e62b9dd3e0dffe4f62b953ae6048d", "tree": "baf7e79de006ca80eac426d2d1be4c52f5f19624", "parents": [ "fe3cba17c49471e99d3421e675fc8b3deaaf0b70" ], "author": { "name": "Rusty Russell", "email": "rusty@rustcorp.com.au", "time": "Thu Jul 19 01:48:08 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 10:04:44 2007 -0700" }, "message": "readahead: split ondemand readahead interface into two functions\n\nSplit ondemand readahead interface into two functions. I think this makes it\na little clearer for non-readahead experts (like Rusty).\n\nInternally they both call ondemand_readahead(), but the page argument is\nchanged to an obvious boolean flag.\n\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Fengguang Wu \u003cwfg@mail.ustc.edu.cn\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "fe3cba17c49471e99d3421e675fc8b3deaaf0b70", "tree": "df696c4584c6db2e439f068d2474fcb946ca587d", "parents": [ "d8983910a4045fa21022cfccf76ed13eb40fd7f5" ], "author": { "name": "Fengguang Wu", "email": "wfg@mail.ustc.edu.cn", "time": "Thu Jul 19 01:48:07 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 10:04:44 2007 -0700" }, "message": "mm: share PG_readahead and PG_reclaim\n\nShare the same page flag bit for PG_readahead and PG_reclaim.\n\nOne is used only on file reads, another is only for emergency writes. One\nis used mostly for fresh/young pages, another is for old pages.\n\nCombinations of possible interactions are:\n\na) clear PG_reclaim \u003d\u003e implicit clear of PG_readahead\n\tit will delay an asynchronous readahead into a synchronous one\n\tit actually does _good_ for readahead:\n\t\tthe pages will be reclaimed soon, it\u0027s readahead thrashing!\n\t\tin this case, synchronous readahead makes more sense.\n\nb) clear PG_readahead \u003d\u003e implicit clear of PG_reclaim\n\tone(and only one) page will not be reclaimed in time\n\tit can be avoided by checking PageWriteback(page) in readahead first\n\nc) set PG_reclaim \u003d\u003e implicit set of PG_readahead\n\twill confuse readahead and make it restart the size rampup process\n\tit\u0027s a trivial problem, and can mostly be avoided by checking\n\tPageWriteback(page) first in readahead\n\nd) set PG_readahead \u003d\u003e implicit set of PG_reclaim\n\tPG_readahead will never be set on already cached pages.\n\tPG_reclaim will always be cleared on dirtying a page.\n\tso not a problem.\n\nIn summary,\n\ta) we get better behavior\n\tb,d) possible interactions can be avoided\n\tc) racy condition exists that might affect readahead, but the chance\n\t is _really_ low, and the hurt on readahead is trivial.\n\nCompound pages also use PG_reclaim, but for now they do not interact with\nreclaim/readahead code.\n\nSigned-off-by: Fengguang Wu \u003cwfg@mail.ustc.edu.cn\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c743d96b6d2ff55a94df7b5ac7c74987bb9c343b", "tree": "391e5dad21e62590e343c63e5ba05322d0fc76ad", "parents": [ "dc7868fcb9a73990e6f30371c1be465c436a7a7f" ], "author": { "name": "Fengguang Wu", "email": "wfg@mail.ustc.edu.cn", "time": "Thu Jul 19 01:48:04 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Jul 19 10:04:44 2007 -0700" }, "message": "readahead: remove the old algorithm\n\nRemove the old readahead algorithm.\n\nSigned-off-by: Fengguang Wu \u003cwfg@mail.ustc.edu.cn\u003e\nCc: Steven Pratt \u003cslpratt@austin.ibm.com\u003e\nCc: Ram Pai \u003clinuxram@us.ibm.com\u003e\nCc: Rusty Russell \u003crusty@rustcorp.com.au\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" } ], "next": "3ea89ee86a82e9fbde37018d9b9e92a552e5fd13" }