)]}' { "log": [ { "commit": "44048d700bcbfaf4bcca6e2e0a73d89d01ec0878", "tree": "975427ee367023b6e3a254519d5e5fdced2c0969", "parents": [ "e6a5c27f3b0fef72e528fc35e343af4b2db790ff" ], "author": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Nov 12 14:14:44 2007 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Nov 12 14:14:44 2007 -0800" }, "message": "Revert \"Bias the placement of kernel pages at lower PFNs\"\n\nThis reverts commit 5adc5be7cd1bcef6bb64f5255d2a33f20a3cf5be.\n\nAlexey Dobriyan reports that it causes huge slowdowns under some loads,\nin his case a \"mkfs.ext2\" on a 30G partition. With the placement bias,\nthe mkfs took over four minutes, with it reverted it\u0027s back to about ten\nseconds for Alexey.\n\nReported-and-tested-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "efe44183f6bab5b8acb6a6182d95274978c8abb1", "tree": "86a1c11218644190c30a7c03931e5ca2c6e2e12e", "parents": [ "00ec99da43a7c2aed46c6595aa271b84bb1b1462" ], "author": { "name": "Denis Cheng", "email": "crquan@gmail.com", "time": "Tue Nov 13 00:49:42 2007 +0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Nov 12 10:32:29 2007 -0800" }, "message": "SLUB: killed the unused \"end\" variable\n\nSince the macro \"for_each_object\" introduced, the \"end\" variable becomes unused anymore.\n\nSigned-off-by: Denis Cheng \u003ccrquan@gmail.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "221d46841b931d0e6b11e6251e482f2afe3974dd", "tree": "feb33999f71a84003f4ac752300c81f47f9e272f", "parents": [ "4d20826ffb6fa80c71b85d2cb858ae400a59a4d5", "633872b980f55f40a5e7de374f26970e41e2137b" ], "author": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Nov 05 11:39:00 2007 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Nov 05 11:39:00 2007 -0800" }, "message": "Merge branch \u0027master\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-lguest\n\n* \u0027master\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-lguest:\n lguest: tidy up documentation\n kernel/futex.c: make 3 functions static\n unexport access_process_vm\n lguest: make async_hcall() static\n" }, { "commit": "05aa345034de6ae9c77fb93f6a796013641d57d5", "tree": "3522f909f91e14b86e8dc0cedcb8e17bc0901bbe", "parents": [ "aac9e28d2f3d3c1eacc4114d685864a2a6423b80" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Mon Nov 05 11:31:58 2007 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Nov 05 11:37:12 2007 -0800" }, "message": "SLUB: Fix memory leak by not reusing cpu_slab\n\nFix the memory leak that may occur when we attempt to reuse a cpu_slab\nthat was allocated while we reenabled interrupts in order to be able to\ngrow a slab cache.\n\nThe per cpu freelist may contain objects and in that situation we may\noverwrite the per cpu freelist pointer loosing objects. This only\noccurs if we find that the concurrently allocated slab fits our\nallocation needs.\n\nIf we simply always deactivate the slab then the freelist will be\nproperly reintegrated and the memory leak will go away.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nAcked-by: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "02c3530da6b926b31f89ba589da72eca49557edd", "tree": "51e2e041fb2872819efc214b3818946be57c17c5", "parents": [ "9b56fdb458b014bdda974b43a3e59721032898bb" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Fri Nov 02 16:43:28 2007 +0100" }, "committer": { "name": "Rusty Russell", "email": "rusty@rustcorp.com.au", "time": "Mon Nov 05 21:53:39 2007 +1100" }, "message": "unexport access_process_vm\n\nThis patch removes the no longer used EXPORT_SYMBOL_GPL(access_process_vm).\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nSigned-off-by: Rusty Russell \u003crusty@rustcorp.com.au\u003e\n" }, { "commit": "5307cc1aa53850f017c8053db034cf950b670ac9", "tree": "6fd2ff3fe382ba1aac5e8b6c703268200a80ed40", "parents": [ "bb374b7b938f73666c403b201b3dd48ec9fe118a" ], "author": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 31 09:19:46 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 31 09:19:46 2007 -0700" }, "message": "Remove broken ptrace() special-case code from file mapping\n\nThe kernel has for random historical reasons allowed ptrace() accesses\nto access (and insert) pages into the page cache above the size of the\nfile.\n\nHowever, Nick broke that by mistake when doing the new fault handling in\ncommit 54cb8821de07f2ffcd28c380ce9b93d5784b40d7 (\"mm: merge populate and\nnopage into fault (fixes nonlinear)\". The breakage caused a hang with\ngdb when trying to access the invalid page.\n\nThe ptrace \"feature\" really isn\u0027t worth resurrecting, since it really is\nwrong both from a portability _and_ from an internal page cache validity\nstandpoint. So this removes those old broken remnants, and fixes the\nptrace() hang in the process.\n\nNoticed and bisected by Duane Griffin, who also supplied a test-case\n(quoth Nick: \"Well that\u0027s probably the best bug report I\u0027ve ever had,\nthanks Duane!\").\n\nCc: Duane Griffin \u003cduaneg@dghda.com\u003e\nAcked-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "bdb76ef5a4bc8676a81034a443f1eda450b4babb", "tree": "b4ec8736e6d4bed26f96c94d5c7c8eec0896fcd0", "parents": [ "e58b7dab272ecee09cd7bafb89d6b224cd17bbe3" ], "author": { "name": "Zach Brown", "email": "zach.brown@oracle.com", "time": "Tue Oct 30 11:45:46 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 30 12:14:06 2007 -0700" }, "message": "dio: fix cache invalidation after sync writes\n\nCommit commit 65b8291c4000e5f38fc94fb2ca0cb7e8683c8a1b (\"dio: invalidate\nclean pages before dio write\") introduced a bug which stopped dio from\never invalidating the page cache after writes. It still invalidated it\nbefore writes so most users were fine.\n\nKarl Schendel reported ( http://lkml.org/lkml/2007/10/26/481 ) hitting\nthis bug when he had a buffered reader immediately reading file data\nafter an O_DIRECT wirter had written the data. The kernel issued\nread-ahead beyond the position of the reader which overlapped with the\nO_DIRECT writer. The failure to invalidate after writes caused the\nreader to see stale data from the read-ahead.\n\nThe following patch is originally from Karl. The following commentary\nis his:\n\n\tThe below 3rd try takes on your suggestion of just invalidating\n\tno matter what the retval from the direct_IO call. I ran it\n\tthru the test-case several times and it has worked every time.\n\tThe post-invalidate is probably still too early for async-directio,\n\tbut I don\u0027t have a testcase for that; just sync. And, this\n\twon\u0027t be any worse in the async case.\n\nI added a test to the aio-dio-regress repository which mimics Karl\u0027s IO\npattern. It verifed the bad behaviour and that the patch fixed it. I\nagree with Karl, this still doesn\u0027t help the case where a buffered\nreader follows an AIO O_DIRECT writer. That will require a bit more\nwork.\n\nThis gives up on the idea of returning EIO to indicate to userspace that\nstale data remains if the invalidation failed.\n\nSigned-off-by: Zach Brown \u003czach.brown@oracle.com\u003e\nCc: Karl Schendel \u003ckschendel@datallegro.com\u003e\nCc: Benjamin LaHaise \u003cbcrl@kvack.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: Leonid Ananiev \u003cleonid.i.ananiev@linux.intel.com\u003e\nCc: Chris Mason \u003cchris.mason@oracle.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "487e9bf25cbae11b131d6a14bdbb3a6a77380837", "tree": "0b6666750274aadd22b29b1282aa779831976ca1", "parents": [ "8bca44bbd39007065cc6a4e3a50201475629a6cf" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Oct 29 14:37:20 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 30 08:06:55 2007 -0700" }, "message": "fix tmpfs BUG and AOP_WRITEPAGE_ACTIVATE\n\nIt\u0027s possible to provoke unionfs (not yet in mainline, though in mm and\nsome distros) to hit shmem_writepage\u0027s BUG_ON(page_mapped(page)). I expect\nit\u0027s possible to provoke the 2.6.23 ecryptfs in the same way (but the\n2.6.24 ecryptfs no longer calls lower level\u0027s -\u003ewritepage).\n\nThis came to light with the recent find that AOP_WRITEPAGE_ACTIVATE could\nleak from tmpfs via write_cache_pages and unionfs to userspace. There\u0027s\nalready a fix (e423003028183df54f039dfda8b58c49e78c89d7 - writeback: don\u0027t\npropagate AOP_WRITEPAGE_ACTIVATE) in the tree for that, and it\u0027s okay so\nfar as it goes; but insufficient because it doesn\u0027t address the underlying\nissue, that shmem_writepage expects to be called only by vmscan (relying on\nbacking_dev_info capabilities to prevent the normal writeback path from\never approaching it).\n\nThat\u0027s an increasingly fragile assumption, and ramdisk_writepage (the other\nsource of AOP_WRITEPAGE_ACTIVATEs) is already careful to check\nwbc-\u003efor_reclaim before returning it. Make the same check in\nshmem_writepage, thereby sidestepping the page_mapped BUG also.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Erez Zadok \u003cezk@cs.sunysb.edu\u003e\nCc: \u003cstable@kernel.org\u003e\nReviewed-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8bca44bbd39007065cc6a4e3a50201475629a6cf", "tree": "ce2735c05a2ae18965505014db3a4103d75cb2dc", "parents": [ "4138f08d1c2783a28df2af6ed81aa180462ec374" ], "author": { "name": "Glauber de Oliveira Costa", "email": "gcosta@redhat.com", "time": "Mon Oct 29 14:37:19 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 30 08:06:55 2007 -0700" }, "message": "mm/sparse-vmemmap.c: make sure init_mm is included\n\nmm/sparse-vmemmap.c uses init_mm in some places. However, it is not\npresent in any of the headers currently included in the file.\n\ninit_mm is defined as extern in sched.h, so we add it to the headers list\n\nUp to now, this problem was masked by the fact that functions like\nset_pte_at() and pmd_populate_kernel() are usually macros that expand to\nsimpler variants that does not use the first parameter at all.\n\nSigned-off-by: Glauber de Oliveira Costa \u003cgcosta@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": "6a22c57b8d2a62dea7280a6b2ac807a539ef0716", "tree": "8a1da0c5de1fa8c895bd1ac052e99042afa9a454", "parents": [ "3529a233421fc43fa7bfdf7a4317daf28348a23d" ], "author": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Oct 29 11:36:04 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Oct 29 14:05:37 2007 -0700" }, "message": "Revert \"x86_64: allocate sparsemem memmap above 4G\"\n\nThis reverts commit 2e1c49db4c640b35df13889b86b9d62215ade4b6.\n\nFirst off, testing in Fedora has shown it to cause boot failures,\nbisected down by Martin Ebourne, and reported by Dave Jobes. So the\ncommit will likely be reverted in the 2.6.23 stable kernels.\n\nSecondly, in the 2.6.24 model, x86-64 has now grown support for\nSPARSEMEM_VMEMMAP, which disables the relevant code anyway, so while the\nbug is not visible any more, it\u0027s become invisible due to the code just\nbeing irrelevant and no longer enabled on the only architecture that\nthis ever affected.\n\nReported-by: Dave Jones \u003cdavej@redhat.com\u003e\nTested-by: Martin Ebourne \u003cfedora@ebourne.me.uk\u003e\nCc: Zou Nan hai \u003cnanhai.zou@intel.com\u003e\nCc: Suresh Siddha \u003csuresh.b.siddha@intel.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nAcked-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f2b8544f5f50073fcc705e16b45a6821d50eb080", "tree": "53c6d6fc035ed4d907276ef2ab2e8aab853e9919", "parents": [ "cbf67812b2f1431c5e432ddecd202984c6882f2a" ], "author": { "name": "David Howells", "email": "dhowells@redhat.com", "time": "Mon Oct 29 13:15:39 2007 +0000" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Oct 29 07:53:26 2007 -0700" }, "message": "NOMMU: mm/nommu.c needs linux/module.h\n\nmm/nommu.c needs to #include linux/module.h for it to understand EXPORT_*()\nmacros.\n\nSigned-off-by: David Howells \u003cdhowells@redhat.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cbf67812b2f1431c5e432ddecd202984c6882f2a", "tree": "a6c6fc3d65fdababe7af31433038dcc32ec05ebb", "parents": [ "20dc9f01a867318ac0bc3ea9185d71f05076aeb0", "33013a881104304fcffe817f17f22a1588908037" ], "author": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Oct 29 07:49:28 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Oct 29 07:49:28 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 compat_ioctl: fix block device compat ioctl regression\n [BLOCK] Fix bad sharing of tag busy list on queues with shared tag maps\n Fix a build error when BLOCK\u003dn\n block: use lock bitops for the tag map.\n cciss: update copyright notices\n cfq_get_queue: fix possible NULL pointer access\n blk_sync_queue() should cancel request_queue-\u003eunplug_work\n cfq_exit_queue() should cancel cfq_data-\u003eunplug_work\n block layer: remove a unused argument of drive_stat_acct()\n" }, { "commit": "27bb628a1d759cc82ff6360becf61de601907811", "tree": "ce5c354e83a48ad60c50cab2967de4f7285c703f", "parents": [ "2d8a972661832719931b0dd5b80e97215cb93d94" ], "author": { "name": "Al Viro", "email": "viro@ftp.linux.org.uk", "time": "Mon Oct 29 04:42:55 2007 +0000" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Oct 29 07:41:32 2007 -0700" }, "message": "missing atomic_read_long() in slub.c\n\nnr_slabs is atomic_long_t, not atomic_t\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3a424f2d56613acfb9e583ec9c85a2be3e3af028", "tree": "6d01585f65282ed99e422345946c2692f19d96f4", "parents": [ "adb4ddbbfb90c302e78da68b3f015588ca45d7f3" ], "author": { "name": "Emil Medve", "email": "Emilian.Medve@Freescale.com", "time": "Wed Oct 24 14:18:32 2007 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Mon Oct 29 11:33:06 2007 +0100" }, "message": "Fix a build error when BLOCK\u003dn\n\nmm/filemap.c: In function \u0027__filemap_fdatawrite_range\u0027:\nmm/filemap.c:200: error: implicit declaration of function\n\u0027mapping_cap_writeback_dirty\u0027\n\nThis happens when we don\u0027t use/have any block devices and a NFS root\nfilesystem is used.\n\nmapping_cap_writeback_dirty() is defined in linux/backing-dev.h which\nused to be provided in mm/filemap.c by linux/blkdev.h until commit\nf5ff8422bbdd59f8c1f699df248e1b7a11073027 (Fix warnings with\n!CONFIG_BLOCK).\n\nSigned-off-by: Emil Medve \u003cEmilian.Medve@Freescale.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "1ddd439ef987c9f0209e6ce824b67518f2afe67b", "tree": "1f6e0ef40c2b9cf5819d9193d7d06c6a0a33ff6c", "parents": [ "4ae3f847e49e3787eca91bced31f8fd328d50496" ], "author": { "name": "Hugh Dickins", "email": "hugh@veritas.com", "time": "Mon Oct 22 20:45:12 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 23 08:32:06 2007 -0700" }, "message": "fix mprotect vma_wants_writenotify prot\n\nFix mprotect bug in recent commit 3ed75eb8f1cd89565966599c4f77d2edb086d5b0\n(setup vma-\u003evm_page_prot by vm_get_page_prot()): the vma_wants_writenotify\ncase was setting the same prot as when not.\n\nNothing wrong with the use of protection_map[] in mmap_region(),\nbut use vm_get_page_prot() there too in the same ~VM_SHARED way.\n\nSigned-off-by: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Coly Li \u003ccoyli@suse.de\u003e\nCc: Tony Luck \u003ctony.luck@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "39655164405940d4818224a085e35420e2f97aed", "tree": "6b019b3bc77eecac1731fe64e5c031790c2b5223", "parents": [ "cfaea787c05822acbb4d8963baee5edd1cc0258f" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Sun Oct 21 16:42:17 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Oct 22 08:13:21 2007 -0700" }, "message": "exportfs: make struct export_operations const\n\nNow that nfsd has stopped writing to the find_exported_dentry member we an\nmark the export_operations const\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nCc: Neil Brown \u003cneilb@suse.de\u003e\nCc: \"J. Bruce Fields\" \u003cbfields@fieldses.org\u003e\nCc: \u003clinux-ext4@vger.kernel.org\u003e\nCc: Dave Kleikamp \u003cshaggy@austin.ibm.com\u003e\nCc: Anton Altaparmakov \u003caia21@cantab.net\u003e\nCc: David Chinner \u003cdgc@sgi.com\u003e\nCc: Timothy Shimmin \u003ctes@sgi.com\u003e\nCc: OGAWA Hirofumi \u003chirofumi@mail.parknet.co.jp\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Chris Mason \u003cmason@suse.com\u003e\nCc: Jeff Mahoney \u003cjeffm@suse.com\u003e\nCc: \"Vladimir V. Saveliev\" \u003cvs@namesys.com\u003e\nCc: Steven Whitehouse \u003cswhiteho@redhat.com\u003e\nCc: Mark Fasheh \u003cmark.fasheh@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": "480b116c98344ca246f50aade6eb7aca98151a2f", "tree": "72ba3ba17f8c5a72fbd168d1a963b06e269ad898", "parents": [ "905251a02eeccc59f8e1d743679b8edadc5f738b" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Sun Oct 21 16:42:13 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Oct 22 08:13:20 2007 -0700" }, "message": "shmem: new export ops\n\nI\u0027m not sure what people were thinking when adding support to export tmpfs,\nbut here\u0027s the conversion anyway:\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nCc: Neil Brown \u003cneilb@suse.de\u003e\nCc: \"J. Bruce Fields\" \u003cbfields@fieldses.org\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b9049e234401e1fad8459d69a952b174d76c399d", "tree": "619adc6533f33379baf25253ff56603b272453c8", "parents": [ "7b78d335ac15b10bbcb0397c635d7f0d569b0270" ], "author": { "name": "Yasunori Goto", "email": "y-goto@jp.fujitsu.com", "time": "Sun Oct 21 16:41:37 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Oct 22 08:13:17 2007 -0700" }, "message": "memory hotplug: make kmem_cache_node for SLUB on memory online avoid panic\n\nFix a panic due to access NULL pointer of kmem_cache_node at discard_slab()\nafter memory online.\n\nWhen memory online is called, kmem_cache_nodes are created for all SLUBs\nfor new node whose memory are available.\n\nslab_mem_going_online_callback() is called to make kmem_cache_node() in\ncallback of memory online event. If it (or other callbacks) fails, then\nslab_mem_offline_callback() is called for rollback.\n\nIn memory offline, slab_mem_going_offline_callback() is called to shrink\nall slub cache, then slab_mem_offline_callback() is called later.\n\n[akpm@linux-foundation.org: coding-style fixes]\n[akpm@linux-foundation.org: locking fix]\n[akpm@linux-foundation.org: build fix]\nSigned-off-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7b78d335ac15b10bbcb0397c635d7f0d569b0270", "tree": "3e49006c0166ff8bcc6e11b401437fc31d875ec8", "parents": [ "10020ca246c55744dad815ad4f15e1f488ca55a8" ], "author": { "name": "Yasunori Goto", "email": "y-goto@jp.fujitsu.com", "time": "Sun Oct 21 16:41:36 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Mon Oct 22 08:13:17 2007 -0700" }, "message": "memory hotplug: rearrange memory hotplug notifier\n\nCurrent memory notifier has some defects yet. (Fortunately, nothing uses\nit.) This patch is to fix and rearrange for them.\n\n - Add information of start_pfn, nr_pages, and node id if node status is\n changes from/to memoryless node for callback functions.\n Callbacks can\u0027t do anything without those information.\n - Add notification going-online status.\n It is necessary for creating per node structure before the node\u0027s\n pages are available.\n - Move GOING_OFFLINE status notification after page isolation.\n It is good place for return memory like cache for callback,\n because returned page is not used again.\n - Make CANCEL events for rollingback when error occurs.\n - Delete MEM_MAPPING_INVALID notification. It will be not used.\n - Fix compile error of (un)register_memory_notifier().\n\nSigned-off-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e91a810e884850781a1cada2ea81b8016881d244", "tree": "ed23efe49c12aeb8e336795bee11dde3e4ebb2ec", "parents": [ "e8b8c977734193adedf2b0f607d6252c78e86394" ], "author": { "name": "Al Viro", "email": "viro@ftp.linux.org.uk", "time": "Sat Oct 20 21:45:33 2007 +0100" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Sat Oct 20 15:04:06 2007 -0700" }, "message": "oom_kill bug\n\nWrong order of arguments\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ad3d0a3827a3ce45ee4141de81be7375157b42de", "tree": "47c96799b8108e57dd24036beae314441eb8822f", "parents": [ "2de206d8f09c8b01d3721f860c28258838953a18" ], "author": { "name": "Philipp Marek", "email": "philipp.marek@bmlv.gv.at", "time": "Sat Oct 20 02:46:58 2007 +0200" }, "committer": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Sat Oct 20 02:46:58 2007 +0200" }, "message": "small documentation fixes\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\n" }, { "commit": "e9534b3fd7843d1bd5a7a1fe2474a09f72d41ab8", "tree": "90a935afb9962ea5696149c8ca8a11b2fe97b2bd", "parents": [ "88a9b03775cbd5124c91f350b89c0dfb9d6550eb" ], "author": { "name": "Gabriel Craciunescu", "email": "nix.or.die@googlemail.com", "time": "Sat Oct 20 02:13:26 2007 +0200" }, "committer": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Sat Oct 20 02:13:26 2007 +0200" }, "message": "Typo fixes retrun -\u003e return\n\nTypo fixes retrun -\u003e return\n\nSigned-off-by: Gabriel Craciunescu \u003cnix.or.die@googlemail.com\u003e\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\n" }, { "commit": "183ff22bb6bd8188c904ebfb479656ae52230b72", "tree": "425207fc9cdca03df64ee8241ba764c75db4d8d1", "parents": [ "676b1855de0a18100b3c340084eb8ef72bde4fb1" ], "author": { "name": "Simon Arlott", "email": "simon@fire.lp0.eux", "time": "Sat Oct 20 01:27:18 2007 +0200" }, "committer": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Sat Oct 20 01:27:18 2007 +0200" }, "message": "spelling fixes: mm/\n\nSpelling fixes in mm/.\n\nSigned-off-by: Simon Arlott \u003csimon@fire.lp0.eu\u003e\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\n" }, { "commit": "8518609deeacebafd71855f87cc411adb0c3be4e", "tree": "899ae1c7eaa49aa4641351868d77fc6c60006ed7", "parents": [ "3a4fa0a25da81600ea0bcd75692ae8ca6050d165" ], "author": { "name": "Robert P. J. Day", "email": "rpjday@mindspring.com", "time": "Fri Oct 19 23:11:38 2007 +0200" }, "committer": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Fri Oct 19 23:11:38 2007 +0200" }, "message": "Explain clearly why kmalloc() can\u0027t use __GFP_HIGHMEM.\n\nFix the wishy-washy comment to clearly explain why kmalloc() can\u0027t\nuse the __GFP_HIGHMEM zone modifier.\n\nSigned-off-by: Robert P. J. Day \u003crpjday@mindspring.com\u003e\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\n" }, { "commit": "ba25f9dcc4ea6e30839fcab5a5516f2176d5bfed", "tree": "3123c03b25dd5c0cd24b6ab4fc16731217838157", "parents": [ "9a2e70572e94e21e7ec4186702d045415422bda0" ], "author": { "name": "Pavel Emelyanov", "email": "xemul@openvz.org", "time": "Thu Oct 18 23:40:40 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Oct 19 11:53:43 2007 -0700" }, "message": "Use helpers to obtain task pid in printks\n\nThe task_struct-\u003epid member is going to be deprecated, so start\nusing the helpers (task_pid_nr/task_pid_vnr/task_pid_nr_ns) in\nthe kernel.\n\nThe first thing to start with is the pid, printed to dmesg - in\nthis case we may safely use task_pid_nr(). Besides, printks produce\nmore (much more) than a half of all the explicit pid usage.\n\n[akpm@linux-foundation.org: git-drm went and changed lots of stuff]\nSigned-off-by: Pavel Emelyanov \u003cxemul@openvz.org\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": "bac0abd6174e427404dd197cdbefece31e97329b", "tree": "68ed6bd8619552c921c9fb99e83cb04fcb235a39", "parents": [ "19b9b9b54e5f115907efd56be2c3799775a46561" ], "author": { "name": "Pavel Emelyanov", "email": "xemul@openvz.org", "time": "Thu Oct 18 23:40:18 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Oct 19 11:53:40 2007 -0700" }, "message": "Isolate some explicit usage of task-\u003etgid\n\nWith pid namespaces this field is now dangerous to use explicitly, so hide\nit behind the helpers.\n\nAlso the pid and pgrp fields o task_struct and signal_struct are to be\ndeprecated. Unfortunately this patch cannot be sent right now as this\nleads to tons of warnings, so start isolating them, and deprecate later.\n\nActually the p-\u003etgid \u003d\u003d pid has to be changed to has_group_leader_pid(),\nbut Oleg pointed out that in case of posix cpu timers this is the same, and\nthread_group_leader() is more preferable.\n\nSigned-off-by: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nAcked-by: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nCc: Sukadev Bhattiprolu \u003csukadev@us.ibm.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "228ebcbe634a30aec35132ea4375721bcc41bec0", "tree": "a875976fd5bde6e2f931aa235c34c88a2738493f", "parents": [ "b488893a390edfe027bae7a46e9af8083e740668" ], "author": { "name": "Pavel Emelyanov", "email": "xemul@openvz.org", "time": "Thu Oct 18 23:40:16 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Oct 19 11:53:40 2007 -0700" }, "message": "Uninline find_task_by_xxx set of functions\n\nThe find_task_by_something is a set of macros are used to find task by pid\ndepending on what kind of pid is proposed - global or virtual one. All of\nthem are wrappers above the most generic one - find_task_by_pid_type_ns() -\nand just substitute some args for it.\n\nIt turned out, that dereferencing the current-\u003ensproxy-\u003epid_ns construction\nand pushing one more argument on the stack inline cause kernel text size to\ngrow.\n\nThis patch moves all this stuff out-of-line into kernel/pid.c. Together\nwith the next patch it saves a bit less than 400 bytes from the .text\nsection.\n\nSigned-off-by: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Sukadev Bhattiprolu \u003csukadev@us.ibm.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b488893a390edfe027bae7a46e9af8083e740668", "tree": "c469a7f99ad01005a73011c029eb5e5d15454559", "parents": [ "3eb07c8c8adb6f0572baba844ba2d9e501654316" ], "author": { "name": "Pavel Emelyanov", "email": "xemul@openvz.org", "time": "Thu Oct 18 23:40:14 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Oct 19 11:53:40 2007 -0700" }, "message": "pid namespaces: changes to show virtual ids to user\n\nThis is the largest patch in the set. Make all (I hope) the places where\nthe pid is shown to or get from user operate on the virtual pids.\n\nThe idea is:\n - all in-kernel data structures must store either struct pid itself\n or the pid\u0027s global nr, obtained with pid_nr() call;\n - when seeking the task from kernel code with the stored id one\n should use find_task_by_pid() call that works with global pids;\n - when showing pid\u0027s numerical value to the user the virtual one\n should be used, but however when one shows task\u0027s pid outside this\n task\u0027s namespace the global one is to be used;\n - when getting the pid from userspace one need to consider this as\n the virtual one and use appropriate task/pid-searching functions.\n\n[akpm@linux-foundation.org: build fix]\n[akpm@linux-foundation.org: nuther build fix]\n[akpm@linux-foundation.org: yet nuther build fix]\n[akpm@linux-foundation.org: remove unneeded casts]\nSigned-off-by: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@openvz.org\u003e\nCc: Sukadev Bhattiprolu \u003csukadev@us.ibm.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7b1915a989ea4d426d0fd98974ab80f30ef1d779", "tree": "b643758364628db742c3bdd27d0d36c9a39a95a5", "parents": [ "2e1975868ac9d41211fcaa6f2c5e44c4e7ff9e5b" ], "author": { "name": "Matthias Kaehlcke", "email": "matthias.kaehlcke@gmail.com", "time": "Thu Oct 18 23:39:58 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Oct 19 11:53:38 2007 -0700" }, "message": "mm/oom_kill.c: Use list_for_each_entry instead of list_for_each\n\nmm/oom_kill.c: Convert list_for_each to list_for_each_entry in\noom_kill_process()\n\nSigned-off-by: Matthias Kaehlcke \u003cmatthias.kaehlcke@gmail.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": "b460cbc581a53cc088ceba80608021dd49c63c43", "tree": "83c28d0adbc15f4157c77b40fa60c40a71cb8673", "parents": [ "3743ca05ff464b8a9e345c08a6c9ce30485f9805" ], "author": { "name": "Serge E. Hallyn", "email": "serue@us.ibm.com", "time": "Thu Oct 18 23:39:52 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Oct 19 11:53:37 2007 -0700" }, "message": "pid namespaces: define is_global_init() and is_container_init()\n\nis_init() is an ambiguous name for the pid\u003d\u003d1 check. Split it into\nis_global_init() and is_container_init().\n\nA cgroup init has it\u0027s tsk-\u003epid \u003d\u003d 1.\n\nA global init also has it\u0027s tsk-\u003epid \u003d\u003d 1 and it\u0027s active pid namespace\nis the init_pid_ns. But rather than check the active pid namespace,\ncompare the task structure with \u0027init_pid_ns.child_reaper\u0027, which is\ninitialized during boot to the /sbin/init process and never changes.\n\nChangelog:\n\n\t2.6.22-rc4-mm2-pidns1:\n\t- Use \u0027init_pid_ns.child_reaper\u0027 to determine if a given task is the\n\t global init (/sbin/init) process. This would improve performance\n\t and remove dependence on the task_pid().\n\n\t2.6.21-mm2-pidns2:\n\n\t- [Sukadev Bhattiprolu] Changed is_container_init() calls in {powerpc,\n\t ppc,avr32}/traps.c for the _exception() call to is_global_init().\n\t This way, we kill only the cgroup if the cgroup\u0027s init has a\n\t bug rather than force a kernel panic.\n\n[akpm@linux-foundation.org: fix comment]\n[sukadev@us.ibm.com: Use is_global_init() in arch/m32r/mm/fault.c]\n[bunk@stusta.de: kernel/pid.c: remove unused exports]\n[sukadev@us.ibm.com: Fix capability.c to work with threaded init]\nSigned-off-by: Serge E. Hallyn \u003cserue@us.ibm.com\u003e\nSigned-off-by: Sukadev Bhattiprolu \u003csukadev@us.ibm.com\u003e\nAcked-by: Pavel Emelianov \u003cxemul@openvz.org\u003e\nCc: Eric W. Biederman \u003cebiederm@xmission.com\u003e\nCc: Cedric Le Goater \u003cclg@fr.ibm.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: Herbert Poetzel \u003cherbert@13thfloor.at\u003e\nCc: Kirill Korotaev \u003cdev@sw.ru\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8793d854edbc2774943a4b0de3304dc73991159a", "tree": "380b3403a0fedfcce61d9af5af1ffbcc71017abf", "parents": [ "81a6a5cdd2c5cd70874b88afe524ab09e9e869af" ], "author": { "name": "Paul Menage", "email": "menage@google.com", "time": "Thu Oct 18 23:39:39 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Oct 19 11:53:36 2007 -0700" }, "message": "Task Control Groups: make cpusets a client of cgroups\n\nRemove the filesystem support logic from the cpusets system and makes cpusets\na cgroup subsystem\n\nThe \"cpuset\" filesystem becomes a dummy filesystem; attempts to mount it get\npassed through to the cgroup filesystem with the appropriate options to\nemulate the old cpuset filesystem behaviour.\n\nSigned-off-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Serge E. Hallyn \u003cserue@us.ibm.com\u003e\nCc: \"Eric W. Biederman\" \u003cebiederm@xmission.com\u003e\nCc: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: Paul Jackson \u003cpj@sgi.com\u003e\nCc: Kirill Korotaev \u003cdev@openvz.org\u003e\nCc: Herbert Poetzl \u003cherbert@13thfloor.at\u003e\nCc: Srivatsa Vaddagiri \u003cvatsa@in.ibm.com\u003e\nCc: Cedric Le Goater \u003cclg@fr.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": "8f731f7d83d6c6a3eeb32cce79bfcddbf7fac8cc", "tree": "706de5d8801259311a7a3b3987bc3b6e6511637d", "parents": [ "cb680c1be62e9898fc2ca2a89d9fdba7c84a5c81" ], "author": { "name": "Randy Dunlap", "email": "randy.dunlap@oracle.com", "time": "Thu Oct 18 23:39:28 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Oct 19 11:53:35 2007 -0700" }, "message": "kernel-api docbook: fix content problems\n\nFix kernel-api docbook contents problems.\n\ndocproc: linux-2.6.23-git13/include/asm-x86/unaligned_32.h: No such file or directory\nWarning(linux-2.6.23-git13//include/linux/list.h:482): bad line: \t\t\tof list entry\nWarning(linux-2.6.23-git13//mm/filemap.c:864): No description found for parameter \u0027ra\u0027\nWarning(linux-2.6.23-git13//block/ll_rw_blk.c:3760): No description found for parameter \u0027req\u0027\nWarning(linux-2.6.23-git13//include/linux/input.h:1077): No description found for parameter \u0027private\u0027\nWarning(linux-2.6.23-git13//include/linux/input.h:1077): No description found for parameter \u0027cdev\u0027\n\nSigned-off-by: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nCc: Jens Axboe \u003cjens.axboe@oracle.com\u003e\nCc: WU Fengguang \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": "3ed75eb8f1cd89565966599c4f77d2edb086d5b0", "tree": "54e77a47b40da80d76baf5eacc2259e0bc5bdf7c", "parents": [ "1c7037db50ebecf3d5cfbf7082daa5d97d900fef" ], "author": { "name": "Coly Li", "email": "coyli@suse.de", "time": "Thu Oct 18 23:39:15 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Oct 19 11:53:34 2007 -0700" }, "message": "setup vma-\u003evm_page_prot by vm_get_page_prot()\n\nThis patch uses vm_get_page_prot() to setup vma-\u003evm_page_prot.\n\nThough inside vm_get_page_prot() the protection flags is AND with\n(VM_READ|VM_WRITE|VM_EXEC|VM_SHARED), it does not hurt correct code.\n\nSigned-off-by: Coly Li \u003ccoyli@suse.de\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nCc: Tony Luck \u003ctony.luck@intel.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "1c7037db50ebecf3d5cfbf7082daa5d97d900fef", "tree": "1843c417160b79c3f79a54d546ddcf5ccdb1b44b", "parents": [ "22124c9999f00340b062fff740db30187bf18454" ], "author": { "name": "Benjamin Herrenschmidt", "email": "benh@kernel.crashing.org", "time": "Thu Oct 18 23:39:14 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Fri Oct 19 11:53:34 2007 -0700" }, "message": "remove unused flush_tlb_pgtables\n\nNobody uses flush_tlb_pgtables anymore, this patch removes all remaining\ntraces of it from all archs.\n\nSigned-off-by: Benjamin Herrenschmidt \u003cbenh@kernel.crashing.org\u003e\nCc: \u003clinux-arch@vger.kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "53253383fde9e41bc07ad4d99f1c8b537fef71d6", "tree": "69154c2bbd3ea63ed2396b2bb2e9493b2614aa91", "parents": [ "a57793651ff1a09ef18bade998632435ca2dc13f" ], "author": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Oct 18 14:47:32 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Oct 18 14:47:32 2007 -0700" }, "message": "Include \u003clinux/backing-dev.h\u003e in mm/filemap.c\n\nIt gets it indirectly from blkdev.h when CONFIG_BLOCK is enabled, but it\nneeds it unconditionally for the definition of mapping_cap_writeback_dirty.\n\nNoticed and bisected down to 4af3c9cc4fad54c3627e9afebf905aafde5690ed\n(\"Drop some headers from mm.h\") by Avuton Olrich.\n\nCc: Avuton Olrich \u003cavuton@gmail.com\u003e\nCc: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "c80544dc0b87bb65038355e7aafdc30be16b26ab", "tree": "176349304bec88a9de16e650c9919462e0dd453c", "parents": [ "0e9663ee452ffce0d429656ebbcfe69417a30e92" ], "author": { "name": "Stephen Hemminger", "email": "shemminger@linux-foundation.org", "time": "Thu Oct 18 03:07:05 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Oct 18 14:37:31 2007 -0700" }, "message": "sparse pointer use of zero as null\n\nGet rid of sparse related warnings from places that use integer as NULL\npointer.\n\n[akpm@linux-foundation.org: coding-style fixes]\nSigned-off-by: Stephen Hemminger \u003cshemminger@linux-foundation.org\u003e\nCc: Andi Kleen \u003cak@suse.de\u003e\nCc: Jeff Garzik \u003cjeff@garzik.org\u003e\nCc: Matt Mackall \u003cmpm@selenic.com\u003e\nCc: Ian Kent \u003craven@themaw.net\u003e\nCc: Arnd Bergmann \u003carnd@arndb.de\u003e\nCc: Davide Libenzi \u003cdavidel@xmailserver.org\u003e\nCc: Stephen Smalley \u003csds@tycho.nsa.gov\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "12d00f6a121877235a5cacc56386936dd9bb81af", "tree": "dc8aafc8ae729f299b43cffa73c15406e76f76a7", "parents": [ "fbf1e473bd0ecc080a4c37bb89848b16c59ac18b" ], "author": { "name": "Akinobu Mita", "email": "akinobu.mita@gmail.com", "time": "Thu Oct 18 03:05:11 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Oct 18 14:37:21 2007 -0700" }, "message": "cpu hotplug: slab: fix memory leak in cpu hotplug error path\n\nThis patch fixes memory leak in error path.\n\nIn reality, we don\u0027t need to call cpuup_canceled(cpu) for now. But upcoming\ncpu hotplug error handling change needs this.\n\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Gautham R Shenoy \u003cego@in.ibm.com\u003e\nAcked-by: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nSigned-off-by: Akinobu Mita \u003cakinobu.mita@gmail.com\u003e\nCc: Gautham R Shenoy \u003cego@in.ibm.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "fbf1e473bd0ecc080a4c37bb89848b16c59ac18b", "tree": "179a7844c0c7722c3fa61d0787845db3c225df4d", "parents": [ "6c72ffaab9851e3ee380c77169c0cfcba6b58d4c" ], "author": { "name": "Akinobu Mita", "email": "akinobu.mita@gmail.com", "time": "Thu Oct 18 03:05:09 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Thu Oct 18 14:37:21 2007 -0700" }, "message": "cpu hotplug: slab: cleanup cpuup_callback()\n\ncpuup_callback() is too long. This patch factors out CPU_UP_CANCELLED and\nCPU_UP_PREPARE handlings from cpuup_callback().\n\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Pekka Enberg \u003cpenberg@cs.helsinki.fi\u003e\nSigned-off-by: Akinobu Mita \u003cakinobu.mita@gmail.com\u003e\nCc: Gautham R Shenoy \u003cego@in.ibm.com\u003e\nCc: Oleg Nesterov \u003coleg@tv-sign.ru\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "fb9fc395174138983a49f2da982ed14caabbe741", "tree": "5d5d3643ee6853a899205613da272cc343fdc1a4", "parents": [ "0eafaae84e21ac033815cc9f33c3ae889cd7ccfe", "ace2e92e193126711cb3a83a3752b2c5b8396950" ], "author": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 11:10:11 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 11:10:11 2007 -0700" }, "message": "Merge branch \u0027xen-upstream\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen\n\n* \u0027xen-upstream\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen:\n xfs: eagerly remove vmap mappings to avoid upsetting Xen\n xen: add some debug output for failed multicalls\n xen: fix incorrect vcpu_register_vcpu_info hypercall argument\n xen: ask the hypervisor how much space it needs reserved\n xen: lock pte pages while pinning/unpinning\n xen: deal with stale cr3 values when unpinning pagetables\n xen: add batch completion callbacks\n xen: yield to IPI target if necessary\n Clean up duplicate includes in arch/i386/xen/\n remove dead code in pgtable_cache_init\n paravirt: clean up lazy mode handling\n paravirt: refactor struct paravirt_ops into smaller pv_*_ops\n" }, { "commit": "cbfee34520666862f8ff539e580c48958fbb7706", "tree": "ded5cafce333e908a0fbeda1f7c55eaf7c1fbaaa", "parents": [ "b53767719b6cd8789392ea3e7e2eb7b8906898f0" ], "author": { "name": "Adrian Bunk", "email": "bunk@kernel.org", "time": "Tue Oct 16 23:31:38 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:43:07 2007 -0700" }, "message": "security/ cleanups\n\nThis patch contains the following cleanups that are now possible:\n- remove the unused security_operations-\u003einode_xattr_getsuffix\n- remove the no longer used security_operations-\u003eunregister_security\n- remove some no longer required exit code\n- remove a bunch of no longer used exports\n\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nAcked-by: James Morris \u003cjmorris@namei.org\u003e\nCc: Chris Wright \u003cchrisw@sous-sol.org\u003e\nCc: Stephen Smalley \u003csds@tycho.nsa.gov\u003e\nCc: Serge Hallyn \u003cserue@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": "b53767719b6cd8789392ea3e7e2eb7b8906898f0", "tree": "a0279dc93c79b94d3865b0f19f6b7b353e20608c", "parents": [ "57c521ce6125e15e99e56c902cb8da96bee7b36d" ], "author": { "name": "Serge E. Hallyn", "email": "serue@us.ibm.com", "time": "Tue Oct 16 23:31:36 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:43:07 2007 -0700" }, "message": "Implement file posix capabilities\n\nImplement file posix capabilities. This allows programs to be given a\nsubset of root\u0027s powers regardless of who runs them, without having to use\nsetuid and giving the binary all of root\u0027s powers.\n\nThis version works with Kaigai Kohei\u0027s userspace tools, found at\nhttp://www.kaigai.gr.jp/index.php. For more information on how to use this\npatch, Chris Friedhoff has posted a nice page at\nhttp://www.friedhoff.org/fscaps.html.\n\nChangelog:\n\tNov 27:\n\tIncorporate fixes from Andrew Morton\n\t(security-introduce-file-caps-tweaks and\n\tsecurity-introduce-file-caps-warning-fix)\n\tFix Kconfig dependency.\n\tFix change signaling behavior when file caps are not compiled in.\n\n\tNov 13:\n\tIntegrate comments from Alexey: Remove CONFIG_ ifdef from\n\tcapability.h, and use %zd for printing a size_t.\n\n\tNov 13:\n\tFix endianness warnings by sparse as suggested by Alexey\n\tDobriyan.\n\n\tNov 09:\n\tAddress warnings of unused variables at cap_bprm_set_security\n\twhen file capabilities are disabled, and simultaneously clean\n\tup the code a little, by pulling the new code into a helper\n\tfunction.\n\n\tNov 08:\n\tFor pointers to required userspace tools and how to use\n\tthem, see http://www.friedhoff.org/fscaps.html.\n\n\tNov 07:\n\tFix the calculation of the highest bit checked in\n\tcheck_cap_sanity().\n\n\tNov 07:\n\tAllow file caps to be enabled without CONFIG_SECURITY, since\n\tcapabilities are the default.\n\tHook cap_task_setscheduler when !CONFIG_SECURITY.\n\tMove capable(TASK_KILL) to end of cap_task_kill to reduce\n\taudit messages.\n\n\tNov 05:\n\tAdd secondary calls in selinux/hooks.c to task_setioprio and\n\ttask_setscheduler so that selinux and capabilities with file\n\tcap support can be stacked.\n\n\tSep 05:\n\tAs Seth Arnold points out, uid checks are out of place\n\tfor capability code.\n\n\tSep 01:\n\tDefine task_setscheduler, task_setioprio, cap_task_kill, and\n\ttask_setnice to make sure a user cannot affect a process in which\n\tthey called a program with some fscaps.\n\n\tOne remaining question is the note under task_setscheduler: are we\n\tok with CAP_SYS_NICE being sufficient to confine a process to a\n\tcpuset?\n\n\tIt is a semantic change, as without fsccaps, attach_task doesn\u0027t\n\tallow CAP_SYS_NICE to override the uid equivalence check. But since\n\tit uses security_task_setscheduler, which elsewhere is used where\n\tCAP_SYS_NICE can be used to override the uid equivalence check,\n\tfixing it might be tough.\n\n\t task_setscheduler\n\t\t note: this also controls cpuset:attach_task. Are we ok with\n\t\t CAP_SYS_NICE being used to confine to a cpuset?\n\t task_setioprio\n\t task_setnice\n\t\t sys_setpriority uses this (through set_one_prio) for another\n\t\t process. Need same checks as setrlimit\n\n\tAug 21:\n\tUpdated secureexec implementation to reflect the fact that\n\teuid and uid might be the same and nonzero, but the process\n\tmight still have elevated caps.\n\n\tAug 15:\n\tHandle endianness of xattrs.\n\tEnforce capability version match between kernel and disk.\n\tEnforce that no bits beyond the known max capability are\n\tset, else return -EPERM.\n\tWith this extra processing, it may be worth reconsidering\n\tdoing all the work at bprm_set_security rather than\n\td_instantiate.\n\n\tAug 10:\n\tAlways call getxattr at bprm_set_security, rather than\n\tcaching it at d_instantiate.\n\n[morgan@kernel.org: file-caps clean up for linux/capability.h]\n[bunk@kernel.org: unexport cap_inode_killpriv]\nSigned-off-by: Serge E. Hallyn \u003cserue@us.ibm.com\u003e\nCc: Stephen Smalley \u003csds@tycho.nsa.gov\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nCc: Chris Wright \u003cchrisw@sous-sol.org\u003e\nCc: Andrew Morgan \u003cmorgan@kernel.org\u003e\nSigned-off-by: Andrew Morgan \u003cmorgan@kernel.org\u003e\nSigned-off-by: Adrian Bunk \u003cbunk@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8d63494f780a77f3edfe9b470d65b7f265ae8d5a", "tree": "9804470c7e12e769ea79c328f0d6f4a37dd3f8ec", "parents": [ "f32143a2fedfa299d790ca96bff9b1d2e2d6996b" ], "author": { "name": "Randy Dunlap", "email": "randy.dunlap@oracle.com", "time": "Tue Oct 16 23:31:29 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:43:07 2007 -0700" }, "message": "remap_file_pages: kernel-doc corrections\n\nFix kernel-doc for sys_remap_file_pages() and add info to the \u0027prot\u0027 NOTE.\nRename __prot parameter to prot.\n\nSigned-off-by: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nAcked-by: 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": "ce8d2cdf3d2b73e346c82e6f0a46da331df6364c", "tree": "bf3597f2d4f57d6e30a7703d7fce0dbf8c757962", "parents": [ "348366b963e4e1462c8354827a9cb910aa865bf2" ], "author": { "name": "Dave Hansen", "email": "haveblue@us.ibm.com", "time": "Tue Oct 16 23:31:13 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:43:04 2007 -0700" }, "message": "r/o bind mounts: filesystem helpers for custom \u0027struct file\u0027s\n\nWhy do we need r/o bind mounts?\n\nThis feature allows a read-only view into a read-write filesystem. In the\nprocess of doing that, it also provides infrastructure for keeping track of\nthe number of writers to any given mount.\n\nThis has a number of uses. It allows chroots to have parts of filesystems\nwritable. It will be useful for containers in the future because users may\nhave root inside a container, but should not be allowed to write to\nsomefilesystems. This also replaces patches that vserver has had out of the\ntree for several years.\n\nIt allows security enhancement by making sure that parts of your filesystem\nread-only (such as when you don\u0027t trust your FTP server), when you don\u0027t want\nto have entire new filesystems mounted, or when you want atime selectively\nupdated. I\u0027ve been using the following script to test that the feature is\nworking as desired. It takes a directory and makes a regular bind and a r/o\nbind mount of it. It then performs some normal filesystem operations on the\nthree directories, including ones that are expected to fail, like creating a\nfile on the r/o mount.\n\nThis patch:\n\nSome filesystems forego the vfs and may_open() and create their own \u0027struct\nfile\u0027s.\n\nThis patch creates a couple of helper functions which can be used by these\nfilesystems, and will provide a unified place which the r/o bind mount code\nmay patch.\n\nAlso, rename an existing, static-scope init_file() to a less generic name.\n\nSigned-off-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "369f2389e7d03022abdd25e298bffb9613cd0e54", "tree": "1071020428c8e3eaa88642682e234de95e7a77bc", "parents": [ "1c0eeaf5698597146ed9b873e2f9e0961edcf0f9" ], "author": { "name": "Fengguang Wu", "email": "wfg@mail.ustc.edu.cn", "time": "Tue Oct 16 23:30:45 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:43:02 2007 -0700" }, "message": "writeback: remove unnecessary wait in throttle_vm_writeout()\n\nWe don\u0027t want to introduce pointless delays in throttle_vm_writeout() when\nthe writeback limits are not yet exceeded, do we?\n\nCc: Nick Piggin \u003cnickpiggin@yahoo.com.au\u003e\nCc: OGAWA Hirofumi \u003chirofumi@mail.parknet.co.jp\u003e\nCc: Kumar Gala \u003cgalak@kernel.crashing.org\u003e\nCc: Pete Zaitcev \u003czaitcev@redhat.com\u003e\nCc: Greg KH \u003cgreg@kroah.com\u003e\nReviewed-by: Rik van Riel \u003criel@redhat.com\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": "1c0eeaf5698597146ed9b873e2f9e0961edcf0f9", "tree": "5265eac8437e8ce517a62db8fe2bd99db5b7019b", "parents": [ "2e6883bdf49abd0e7f0d9b6297fc3be7ebb2250b" ], "author": { "name": "Joern Engel", "email": "joern@wohnheim.fh-wedel.de", "time": "Tue Oct 16 23:30:44 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:43:02 2007 -0700" }, "message": "introduce I_SYNC\n\nI_LOCK was used for several unrelated purposes, which caused deadlock\nsituations in certain filesystems as a side effect. One of the purposes\nnow uses the new I_SYNC bit.\n\nAlso document the various bits and change their order from historical to\nlogical.\n\n[bunk@stusta.de: make fs/inode.c:wake_up_inode() static]\nSigned-off-by: Joern Engel \u003cjoern@wohnheim.fh-wedel.de\u003e\nCc: Dave Kleikamp \u003cshaggy@linux.vnet.ibm.com\u003e\nCc: David Chinner \u003cdgc@sgi.com\u003e\nCc: Anton Altaparmakov \u003caia21@cam.ac.uk\u003e\nCc: Al Viro \u003cviro@ftp.linux.org.uk\u003e\nCc: Christoph Hellwig \u003chch@infradead.org\u003e\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": "2e6883bdf49abd0e7f0d9b6297fc3be7ebb2250b", "tree": "aec0418150413c7e9f43fb2ec68bfd24738b0623", "parents": [ "1f7decf6d9f06dac008b8d66935c0c3b18e564f9" ], "author": { "name": "Fengguang Wu", "email": "wfg@mail.ustc.edu.cn", "time": "Tue Oct 16 23:30:43 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:43:02 2007 -0700" }, "message": "writeback: introduce writeback_control.more_io to indicate more io\n\nAfter making dirty a 100M file, the normal behavior is to start the writeback\nfor all data after 30s delays. But sometimes the following happens instead:\n\n\t- after 30s: ~4M\n\t- after 5s: ~4M\n\t- after 5s: all remaining 92M\n\nSome analyze shows that the internal io dispatch queues goes like this:\n\n\t\ts_io s_more_io\n\t\t-------------------------\n\t1)\t100M,1K 0\n\t2)\t1K 96M\n\t3)\t0 96M\n\n1) initial state with a 100M file and a 1K file\n2) 4M written, nr_to_write \u003c\u003d 0, so write more\n3) 1K written, nr_to_write \u003e 0, no more writes(BUG)\n\nnr_to_write \u003e 0 in (3) fools the upper layer to think that data have all been\nwritten out. The big dirty file is actually still sitting in s_more_io. We\ncannot simply splice s_more_io back to s_io as soon as s_io becomes empty, and\nlet the loop in generic_sync_sb_inodes() continue: this may starve newly\nexpired inodes in s_dirty. It is also not an option to draw inodes from both\ns_more_io and s_dirty, an let the loop go on: this might lead to live locks,\nand might also starve other superblocks in sync time(well kupdate may still\nstarve some superblocks, that\u0027s another bug).\n\nWe have to return when a full scan of s_io completes. So nr_to_write \u003e 0 does\nnot necessarily mean that \"all data are written\". This patch introduces a\nflag writeback_control.more_io to indicate this situation. With it the big\ndirty file no longer has to wait for the next kupdate invocation 5s later.\n\nCc: David Chinner \u003cdgc@sgi.com\u003e\nCc: Ken Chen \u003ckenchen@google.com\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": "bda5b655fe663c86ae16436ab983a656d73b6e62", "tree": "5c0a580aab8dba20fdd9770597706a567b6fe50c", "parents": [ "fb46f341d9868fe993626536c7449c2a1aec62a3" ], "author": { "name": "Robert P. J. Day", "email": "rpjday@mindspring.com", "time": "Tue Oct 16 23:30:05 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:58 2007 -0700" }, "message": "Delete gcc-2.95 compatible structure definition.\n\nSince nothing earlier than gcc-3.2 is supported for kernel\ncompilation, that 2.95 hack can be removed.\n\nSigned-off-by: Robert P. J. Day \u003crpjday@mindspring.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "4af3c9cc4fad54c3627e9afebf905aafde5690ed", "tree": "655364e458b8734a86c632316f4b5a1518529c60", "parents": [ "1a614f505193fcfc1b298643268a5db5b48e297f" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Tue Oct 16 23:29:23 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:55 2007 -0700" }, "message": "Drop some headers from mm.h\n\nmm.h doesn\u0027t use directly anything from mutex.h and backing-dev.h, so\nremove them and add them back to files which need them.\n\nCross-compile tested on many configs and archs.\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "040b5c6f9503f2d6b35c335f8537bb3035d35547", "tree": "71f1693fbcaf9e2a953e66fdf13bbbc20510b60e", "parents": [ "c4f3b63fe15b4629aa1ec163c95ab30423d0f76a" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@sw.ru", "time": "Tue Oct 16 23:26:10 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:47 2007 -0700" }, "message": "SLAB_PANIC more (proc, posix-timers, shmem)\n\nThese aren\u0027t modular, so SLAB_PANIC is OK.\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@sw.ru\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e423003028183df54f039dfda8b58c49e78c89d7", "tree": "56df3ebc51ff86d58b054d9833770e78fb484973", "parents": [ "7a4050791b23c55a451974027d41d72a9b78039b" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Tue Oct 16 23:26:02 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:46 2007 -0700" }, "message": "writeback: don\u0027t propagate AOP_WRITEPAGE_ACTIVATE\n\nThis is a writeback-internal marker but we\u0027re propagating it all the way back\nto userspace!.\n\nCc: \u003cstable@kernel.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7a4050791b23c55a451974027d41d72a9b78039b", "tree": "f3956a04f24a2406276804124853535a59c0cbc1", "parents": [ "d773ed6b856a96bd6d18b6e04455e3ced0876da4" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Tue Oct 16 23:26:02 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:46 2007 -0700" }, "message": "mm: document tree_lock-\u003ezone.lock lockorder\n\nzone-\u003elock is quite an \"inner\" lock and mostly constrained to page alloc as\nwell, so like slab locks, it probably isn\u0027t something that is critically\nimportant to document here. However unlike slab locks, zone lock could be\nused more widely in future, and page_alloc.c might possibly have more\nbusiness to do tricky things with pagecache than does slab. So... I don\u0027t\nthink it hurts to document it.\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": "d773ed6b856a96bd6d18b6e04455e3ced0876da4", "tree": "f0235be6843ec323aeedcdadbee34a777b6c2690", "parents": [ "ae74138da609c576b221c765efa8b81b2365f465" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:26:01 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:46 2007 -0700" }, "message": "mm: test and set zone reclaim lock before starting reclaim\n\nIntroduces new zone flag interface for testing and setting flags:\n\n\tint zone_test_and_set_flag(struct zone *zone, zone_flags_t flag)\n\nInstead of setting and clearing ZONE_RECLAIM_LOCKED each time shrink_zone() is\ncalled, this flag is test and set before starting zone reclaim. Zone reclaim\nstarts in __alloc_pages() when a zone\u0027s watermark fails and the system is in\nzone_reclaim_mode. If it\u0027s already in reclaim, there\u0027s no need to start again\nso it is simply considered full for that allocation attempt.\n\nThere is a change of behavior with regard to concurrent zone shrinking. It is\nnow possible for try_to_free_pages() or kswapd to already be shrinking a\nparticular zone when __alloc_pages() starts zone reclaim. In this case, it is\npossible for two concurrent threads to invoke shrink_zone() for a single zone.\n\nThis change forbids a zone to be in zone reclaim twice, which was always the\nbehavior, but allows for concurrent try_to_free_pages() or kswapd shrinking\nwhen starting zone reclaim.\n\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ae74138da609c576b221c765efa8b81b2365f465", "tree": "514b8ea20d97815a7dfd5fd9ebcb6377b178f2b0", "parents": [ "9aad369e5690cbd0505f75aa1d34c9cacfef48da" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:26:00 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:46 2007 -0700" }, "message": "oom: convert zone_scan_lock from mutex to spinlock\n\nThere\u0027s no reason to sleep in try_set_zone_oom() or clear_zonelist_oom() if\nthe lock can\u0027t be acquired; it will be available soon enough once the zonelist\nscanning is done. All other threads waiting for the OOM killer are also\ncontingent on the exiting task being able to acquire the lock in\nclear_zonelist_oom() so it doesn\u0027t make sense to put it to sleep.\n\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "3ff566963ce804809af9e32331b287eedeeff501", "tree": "dd71c5613b27e8c309d7bbe48798e6cd5c4145cc", "parents": [ "bbe373f2c60b2aa36c3231734a5afc5271a06718" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:25:58 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:46 2007 -0700" }, "message": "oom: do not take callback_mutex\n\nSince no task descriptor\u0027s \u0027cpuset\u0027 field is dereferenced in the execution of\nthe OOM killer anymore, it is no longer necessary to take callback_mutex.\n\n[akpm@linux-foundation.org: restore cpuset_lock for other patches]\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "bbe373f2c60b2aa36c3231734a5afc5271a06718", "tree": "00146d69594672ca41e35be8ff9b349e8751ab5c", "parents": [ "7213f5066fc8a17c78389fe245de522b5cf0648a" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:25:58 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:46 2007 -0700" }, "message": "oom: compare cpuset mems_allowed instead of exclusive ancestors\n\nInstead of testing for overlap in the memory nodes of the the nearest\nexclusive ancestor of both current and the candidate task, it is better to\nsimply test for intersection between the task\u0027s mems_allowed in their task\ndescriptors. This does not require taking callback_mutex since it is only\nused as a hint in the badness scoring.\n\nTasks that do not have an intersection in their mems_allowed with the current\ntask are not explicitly restricted from being OOM killed because it is quite\npossible that the candidate task has allocated memory there before and has\nsince changed its mems_allowed.\n\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "7213f5066fc8a17c78389fe245de522b5cf0648a", "tree": "76e33ed1e0bfa62cb6c2e05bd4bbf79f37ca4796", "parents": [ "fe071d7e8aae5745c009c808bb8933f22a9e305a" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:25:57 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:46 2007 -0700" }, "message": "oom: suppress extraneous stack and memory dump\n\nSuppresses the extraneous stack and memory dump when a parallel OOM killing\nhas been found. There\u0027s no need to fill the ring buffer with this information\nif its already been printed and the condition that triggered the previous OOM\nkiller has not yet been alleviated.\n\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "fe071d7e8aae5745c009c808bb8933f22a9e305a", "tree": "757dc7c41a7b56974c383743103fb711c976c288", "parents": [ "ff0ceb9deb6eb017f52900b708d49cfa77bf25fb" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:25:56 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:46 2007 -0700" }, "message": "oom: add oom_kill_allocating_task sysctl\n\nAdds a new sysctl, \u0027oom_kill_allocating_task\u0027, which will automatically kill\nthe OOM-triggering task instead of scanning through the tasklist to find a\nmemory-hogging target. This is helpful for systems with an insanely large\nnumber of tasks where scanning the tasklist significantly degrades\nperformance.\n\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ff0ceb9deb6eb017f52900b708d49cfa77bf25fb", "tree": "aa33fef12afb05cb2644e7ae38b79ef6dd8ba59d", "parents": [ "098d7f128a4e53cb64930628915ac767785e0e60" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:25:56 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:45 2007 -0700" }, "message": "oom: serialize out of memory calls\n\nA final allocation attempt with a very high watermark needs to be attempted\nbefore invoking out_of_memory(). OOM killer serialization needs to occur\nbefore this final attempt, otherwise tasks attempting to OOM-lock all zones in\nits zonelist may spin and acquire the lock unnecessarily after the OOM\ncondition has already been alleviated.\n\nIf the final allocation does succeed, the zonelist is simply OOM-unlocked and\n__alloc_pages() returns the page. Otherwise, the OOM killer is invoked.\n\nIf the task cannot acquire OOM-locks on all zones in its zonelist, it is put\nto sleep and the allocation is retried when it gets rescheduled. One of its\nzones is already marked as being in the OOM killer so it\u0027ll hopefully be\ngetting some free memory soon, at least enough to satisfy a high watermark\nallocation attempt. This prevents needlessly killing a task when the OOM\ncondition would have already been alleviated if it had simply been given\nenough time.\n\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "098d7f128a4e53cb64930628915ac767785e0e60", "tree": "ed3cab1daecab7f2a64b27deed190df3ec218789", "parents": [ "e815af95f94914993bbad279c71cf5fef9f4eaac" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:25:55 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:45 2007 -0700" }, "message": "oom: add per-zone locking\n\nOOM killer synchronization should be done with zone granularity so that memory\npolicy and cpuset allocations may have their corresponding zones locked and\nallow parallel kills for other OOM conditions that may exist elsewhere in the\nsystem. DMA allocations can be targeted at the zone level, which would not be\npossible if locking was done in nodes or globally.\n\nSynchronization shall be done with a variation of \"trylocks.\" The goal is to\nput the current task to sleep and restart the failed allocation attempt later\nif the trylock fails. Otherwise, the OOM killer is invoked.\n\nEach zone in the zonelist that __alloc_pages() was called with is checked for\nthe newly-introduced ZONE_OOM_LOCKED flag. If any zone has this flag present,\nthe \"trylock\" to serialize the OOM killer fails and returns zero. Otherwise,\nall the zones have ZONE_OOM_LOCKED set and the try_set_zone_oom() function\nreturns non-zero.\n\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "e815af95f94914993bbad279c71cf5fef9f4eaac", "tree": "492e0d3e8d3303f37cf9fb0beecf952a1c828c53", "parents": [ "70e24bdf6d2fead14631e72a07fba012400c521e" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:25:54 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:45 2007 -0700" }, "message": "oom: change all_unreclaimable zone member to flags\n\nConvert the int all_unreclaimable member of struct zone to unsigned long\nflags. This can now be used to specify several different zone flags such as\nall_unreclaimable and reclaim_in_progress, which can now be removed and\nconverted to a per-zone flag.\n\nFlags are set and cleared as follows:\n\n\tzone_set_flag(struct zone *zone, zone_flags_t flag)\n\tzone_clear_flag(struct zone *zone, zone_flags_t flag)\n\nDefines the first zone flags, ZONE_ALL_UNRECLAIMABLE and ZONE_RECLAIM_LOCKED,\nwhich have the same semantics as the old zone-\u003eall_unreclaimable and\nzone-\u003ereclaim_in_progress, respectively. Also converts all current users that\nset or clear either flag to use the new interface.\n\nHelper functions are defined to test the flags:\n\n\tint zone_is_all_unreclaimable(const struct zone *zone)\n\tint zone_is_reclaim_locked(const struct zone *zone)\n\nAll flag operators are of the atomic variety because there are currently\nreaders that are implemented that do not take zone-\u003elock.\n\n[akpm@linux-foundation.org: add needed include]\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "70e24bdf6d2fead14631e72a07fba012400c521e", "tree": "2c00056dfdf90f733876c717159bb8bbf9f440fe", "parents": [ "5a3135c2e77fe88cdea20b5e3f4761068b799ac2" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:25:53 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:45 2007 -0700" }, "message": "oom: move constraints to enum\n\nThe OOM killer\u0027s CONSTRAINT definitions are really more appropriate in an\nenum, so define them in include/linux/oom.h.\n\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "5a3135c2e77fe88cdea20b5e3f4761068b799ac2", "tree": "d82b0568722d285673251210716801e6fc4a90ed", "parents": [ "4ba9b9d0ba0a49d91fa6417c7510ee36f48cf957" ], "author": { "name": "David Rientjes", "email": "rientjes@google.com", "time": "Tue Oct 16 23:25:53 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:45 2007 -0700" }, "message": "oom: move prototypes to appropriate header file\n\nMove the OOM killer\u0027s extern function prototypes to include/linux/oom.h and\ninclude it where necessary.\n\n[clg@fr.ibm.com: build fix]\nCc: Andrea Arcangeli \u003candrea@suse.de\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nSigned-off-by: David Rientjes \u003crientjes@google.com\u003e\nSigned-off-by: Cedric Le Goater \u003cclg@fr.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": "4ba9b9d0ba0a49d91fa6417c7510ee36f48cf957", "tree": "191b4f45f926e44b882b1e87a9a85dc12230b892", "parents": [ "b811c202a0edadaac7242ab834fe7ba409978ae7" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Tue Oct 16 23:25:51 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:45 2007 -0700" }, "message": "Slab API: remove useless ctor parameter and reorder parameters\n\nSlab constructors currently have a flags parameter that is never used. And\nthe order of the arguments is opposite to other slab functions. The object\npointer is placed before the kmem_cache pointer.\n\nConvert\n\n ctor(void *object, struct kmem_cache *s, unsigned long flags)\n\nto\n\n ctor(struct kmem_cache *s, void *object)\n\nthroughout the kernel\n\n[akpm@linux-foundation.org: coupla fixes]\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": "b811c202a0edadaac7242ab834fe7ba409978ae7", "tree": "339a29474e6b1abfd5c172bbe57484e5569d8b7e", "parents": [ "3e26c149c358529b1605f8959341d34bc4b880a3" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Tue Oct 16 23:25:51 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:45 2007 -0700" }, "message": "SLUB: simplify IRQ off handling\n\nMove irq handling out of new slab into __slab_alloc. That is useful for\nMathieu\u0027s cmpxchg_local patchset and also allows us to remove the crude\nlocal_irq_off in early_kmem_cache_alloc().\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": "3e26c149c358529b1605f8959341d34bc4b880a3", "tree": "9d173b1753b86bcf03a8591e2509e3162234447c", "parents": [ "04fbfdc14e5f48463820d6b9807daa5e9c92c51f" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Oct 16 23:25:50 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:45 2007 -0700" }, "message": "mm: dirty balancing for tasks\n\nBased on ideas of Andrew:\n http://marc.info/?l\u003dlinux-kernel\u0026m\u003d102912915020543\u0026w\u003d2\n\nScale the bdi dirty limit inversly with the tasks dirty rate.\nThis makes heavy writers have a lower dirty limit than the occasional writer.\n\nAndrea proposed something similar:\n http://lwn.net/Articles/152277/\n\nThe main disadvantage to his patch is that he uses an unrelated quantity to\nmeasure time, which leaves him with a workload dependant tunable. Other than\nthat the two approaches appear quite similar.\n\n[akpm@linux-foundation.org: fix warning]\nSigned-off-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": "04fbfdc14e5f48463820d6b9807daa5e9c92c51f", "tree": "c62905212c8c6373b2258c7f528398d3c831b075", "parents": [ "145ca25eb2fbd20d4faf1bad4628c7650332058f" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Oct 16 23:25:50 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:45 2007 -0700" }, "message": "mm: per device dirty threshold\n\nScale writeback cache per backing device, proportional to its writeout speed.\n\nBy decoupling the BDI dirty thresholds a number of problems we currently have\nwill go away, namely:\n\n - mutual interference starvation (for any number of BDIs);\n - deadlocks with stacked BDIs (loop, FUSE and local NFS mounts).\n\nIt might be that all dirty pages are for a single BDI while other BDIs are\nidling. By giving each BDI a \u0027fair\u0027 share of the dirty limit, each one can have\ndirty pages outstanding and make progress.\n\nA global threshold also creates a deadlock for stacked BDIs; when A writes to\nB, and A generates enough dirty pages to get throttled, B will never start\nwriteback until the dirty pages go away. Again, by giving each BDI its own\n\u0027independent\u0027 dirty limit, this problem is avoided.\n\nSo the problem is to determine how to distribute the total dirty limit across\nthe BDIs fairly and efficiently. A DBI that has a large dirty limit but does\nnot have any dirty pages outstanding is a waste.\n\nWhat is done is to keep a floating proportion between the DBIs based on\nwriteback completions. This way faster/more active devices get a larger share\nthan slower/idle devices.\n\n[akpm@linux-foundation.org: fix warnings]\n[hugh@veritas.com: Fix occasional hang when a task couldn\u0027t get out of balance_dirty_pages]\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\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": "69cb51d18c1ed593009d9a620cac49d0dcf15dc8", "tree": "f26a1245b638e7421a0afd93305fd1c556867d49", "parents": [ "c9e51e4180696aa67915ec5665e4ec74125565de" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Oct 16 23:25:48 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:45 2007 -0700" }, "message": "mm: count writeback pages per BDI\n\nCount per BDI writeback pages.\n\nSigned-off-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": "c9e51e4180696aa67915ec5665e4ec74125565de", "tree": "d66e1427b16e56bc7da0dfb583a6d8edb55a2c3e", "parents": [ "b2e8fb6efa209c82203c79b491b5bc952d44aa57" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Oct 16 23:25:47 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:45 2007 -0700" }, "message": "mm: count reclaimable pages per BDI\n\nCount per BDI reclaimable pages; nr_reclaimable \u003d nr_dirty + nr_unstable.\n\nSigned-off-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": "b2e8fb6efa209c82203c79b491b5bc952d44aa57", "tree": "e4c82e3f2c70a188ced7126435bf153f5f6c4a1c", "parents": [ "e0bf68ddec4f4f90e5871404be4f1854c17f3120" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Oct 16 23:25:47 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:45 2007 -0700" }, "message": "mm: scalable bdi statistics counters\n\nProvide scalable per backing_dev_info statistics counters.\n\nSigned-off-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": "e0bf68ddec4f4f90e5871404be4f1854c17f3120", "tree": "36203a3558cbe26d698bed18be69b3822fb5eef2", "parents": [ "dc62a30e274d003a4d08fb888f1520add4b21373" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Oct 16 23:25:46 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:45 2007 -0700" }, "message": "mm: bdi init hooks\n\nprovide BDI constructor/destructor hooks\n\n[akpm@linux-foundation.org: compile fix]\nSigned-off-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": "c4dc4beed23827e155d7cbc2a1ffa3949eddd194", "tree": "b7f115c159fe26b90b7e5b7d5dcf2f9318b69bf1", "parents": [ "1f7d6668c29b1dfa307a44844f9bb38356fc989b" ], "author": { "name": "Peter Zijlstra", "email": "a.p.zijlstra@chello.nl", "time": "Tue Oct 16 23:25:41 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Wed Oct 17 08:42:44 2007 -0700" }, "message": "nfs: remove congestion_end()\n\nThese patches aim to improve balance_dirty_pages() and directly address three\nissues:\n 1) inter device starvation\n 2) stacked device deadlocks\n 3) inter process starvation\n\n1 and 2 are a direct result from removing the global dirty limit and using\nper device dirty limits. By giving each device its own dirty limit is will\nno longer starve another device, and the cyclic dependancy on the dirty limit\nis broken.\n\nIn order to efficiently distribute the dirty limit across the independant\ndevices a floating proportion is used, this will allocate a share of the total\nlimit proportional to the device\u0027s recent activity.\n\n3 is done by also scaling the dirty limit proportional to the current task\u0027s\nrecent dirty rate.\n\nThis patch:\n\nnfs: remove congestion_end(). It\u0027s redundant, clear_bdi_congested() already\nwakes the waiters.\n\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nCc: Trond Myklebust \u003ctrond.myklebust@fys.uio.no\u003e\nCc: \"J. Bruce Fields\" \u003cbfields@fieldses.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "74260714c56de4f967fcb2f17a8656bc574b75be", "tree": "f02bcd991285a20a543fae69f916577c8447b8f4", "parents": [ "9f79991d4186089e228274196413572cc000143b" ], "author": { "name": "Jeremy Fitzhardinge", "email": "jeremy@xensource.com", "time": "Tue Oct 16 11:51:30 2007 -0700" }, "committer": { "name": "Jeremy Fitzhardinge", "email": "jeremy@goop.org", "time": "Tue Oct 16 11:51:30 2007 -0700" }, "message": "xen: lock pte pages while pinning/unpinning\n\nWhen a pagetable is created, it is made globally visible in the rmap\nprio tree before it is pinned via arch_dup_mmap(), and remains in the\nrmap tree while it is unpinned with arch_exit_mmap().\n\nThis means that other CPUs may race with the pinning/unpinning\nprocess, and see a pte between when it gets marked RO and actually\npinned, causing any pte updates to fail with write-protect faults.\n\nAs a result, all pte pages must be properly locked, and only unlocked\nonce the pinning/unpinning process has finished.\n\nIn order to avoid taking spinlocks for the whole pagetable - which may\noverflow the PREEMPT_BITS portion of preempt counter - it locks and pins\neach pte page individually, and then finally pins the whole pagetable.\n\nSigned-off-by: Jeremy Fitzhardinge \u003cjeremy@xensource.com\u003e\nCc: Rik van Riel \u003criel@redhat.com\u003e\nCc: Hugh Dickens \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\n\n" }, { "commit": "92d15c2ccbb3e31a3fc71ad28fdb55e1319383c0", "tree": "8d83c0dc3c6b935d8367e331872f242b742f0a8a", "parents": [ "f20bf6125605acbbc7eb8c9420d7221c91aa83eb", "644bd2f048972d75eb1979b1fdca257d528ce687" ], "author": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 10:09:16 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 10:09:16 2007 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.dk/data/git/linux-2.6-block\n\n* \u0027for-linus\u0027 of git://git.kernel.dk/data/git/linux-2.6-block: (63 commits)\n Fix memory leak in dm-crypt\n SPARC64: sg chaining support\n SPARC: sg chaining support\n PPC: sg chaining support\n PS3: sg chaining support\n IA64: sg chaining support\n x86-64: enable sg chaining\n x86-64: update pci-gart iommu to sg helpers\n x86-64: update nommu to sg helpers\n x86-64: update calgary iommu to sg helpers\n swiotlb: sg chaining support\n i386: enable sg chaining\n i386 dma_map_sg: convert to using sg helpers\n mmc: need to zero sglist on init\n Panic in blk_rq_map_sg() from CCISS driver\n remove sglist_len\n remove blk_queue_max_phys_segments in libata\n revert sg segment size ifdefs\n Fixup u14-34f ENABLE_SG_CHAINING\n qla1280: enable use_sg_chaining option\n ...\n" }, { "commit": "e2fc88d0643ca68f2011e6db4aa31e22bd94210c", "tree": "0865518013da9b0209a3c1c55111b46cb789b712", "parents": [ "dbcb0f19c877df9026b8c1227758d38bd561e9c4" ], "author": { "name": "Adrian Bunk", "email": "bunk@stusta.de", "time": "Tue Oct 16 01:26:27 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:03 2007 -0700" }, "message": "mm/vmstat.c: cleanups\n\nThis patch contains the following cleanups:\n- make the needlessly global setup_vmstat() static\n- remove the unused refresh_vm_stats()\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": "dbcb0f19c877df9026b8c1227758d38bd561e9c4", "tree": "f58c85976906f42ff44798f514177392d7c48d0f", "parents": [ "d8dc74f212c38407fc9f4367181f8f969b719485" ], "author": { "name": "Adrian Bunk", "email": "bunk@stusta.de", "time": "Tue Oct 16 01:26:26 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:03 2007 -0700" }, "message": "mm/mempolicy.c: cleanups\n\nThis patch contains the following cleanups:\n- every file should include the headers containing the prototypes for\n its global functions\n- make the follosing needlessly global functions static:\n - migrate_to_node()\n - do_mbind()\n - sp_alloc()\n - mpol_rebind_policy()\n\n[akpm@linux-foundation.org: fix uninitialised var warning]\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": "d8dc74f212c38407fc9f4367181f8f969b719485", "tree": "2ff1ec0aaee1e6b3ee29d258a7158deb4b43688c", "parents": [ "af767cbdd78f293485c294113885d95e7f1da123" ], "author": { "name": "Adrian Bunk", "email": "bunk@stusta.de", "time": "Tue Oct 16 01:26:26 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:03 2007 -0700" }, "message": "mm/shmem.c: make 3 functions static\n\nThis patch makes three needlessly global functions static.\n\nSigned-off-by: Adrian Bunk \u003cbunk@stusta.de\u003e\nCc: Hugh Dickins \u003chugh@veritas.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "af767cbdd78f293485c294113885d95e7f1da123", "tree": "934d5c6180e808ee2062d8d2ef2ed758c452286d", "parents": [ "63b4613c3f0d4b724ba259dc6c201bb68b884e1a" ], "author": { "name": "Adam Litke", "email": "agl@us.ibm.com", "time": "Tue Oct 16 01:26:25 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:03 2007 -0700" }, "message": "hugetlb: fix dynamic pool resize failure case\n\nWhen gather_surplus_pages() fails to allocate enough huge pages to satisfy\nthe requested reservation, it frees what it did allocate back to the buddy\nallocator. put_page() should be called instead of update_and_free_page()\nto ensure that pool counters are updated as appropriate and the page\u0027s\nrefcount is decremented.\n\nSigned-off-by: Adam Litke \u003cagl@us.ibm.com\u003e\nAcked-by: Dave Hansen \u003chaveblue@us.ibm.com\u003e\nCc: David Gibson \u003chermes@gibson.dropbear.id.au\u003e\nCc: William Lee Irwin III \u003cwli@holomorphy.com\u003e\nCc: Badari Pulavarty \u003cpbadari@us.ibm.com\u003e\nCc: Ken Chen \u003ckenchen@google.com\u003e\nCc: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "63b4613c3f0d4b724ba259dc6c201bb68b884e1a", "tree": "878818a47052fd204aa0a5d34e592967732d59f9", "parents": [ "6b0c880dfefecedb9ad353014ed41505c32aca82" ], "author": { "name": "Nishanth Aravamudan", "email": "nacc@us.ibm.com", "time": "Tue Oct 16 01:26:24 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:03 2007 -0700" }, "message": "hugetlb: fix hugepage allocation with memoryless nodes\n\nAnton found a problem with the hugetlb pool allocation when some nodes have\nno memory (http://marc.info/?l\u003dlinux-mm\u0026m\u003d118133042025995\u0026w\u003d2). Lee worked\non versions that tried to fix it, but none were accepted. Christoph has\ncreated a set of patches which allow for GFP_THISNODE allocations to fail\nif the node has no memory.\n\nCurrently, alloc_fresh_huge_page() returns NULL when it is not able to\nallocate a huge page on the current node, as specified by its custom\ninterleave variable. The callers of this function, though, assume that a\nfailure in alloc_fresh_huge_page() indicates no hugepages can be allocated\non the system period. This might not be the case, for instance, if we have\nan uneven NUMA system, and we happen to try to allocate a hugepage on a\nnode with less memory and fail, while there is still plenty of free memory\non the other nodes.\n\nTo correct this, make alloc_fresh_huge_page() search through all online\nnodes before deciding no hugepages can be allocated. Add a helper function\nfor actually allocating the hugepage. Use a new global nid iterator to\ncontrol which nid to allocate on.\n\nNote: we expect particular semantics for __GFP_THISNODE, which are now\nenforced even for memoryless nodes. That is, there is should be no\nfallback to other nodes. Therefore, we rely on the nid passed into\nalloc_pages_node() to be the nid the page comes from. If this is\nincorrect, accounting will break.\n\nTested on x86 !NUMA, x86 NUMA, x86_64 NUMA and ppc64 NUMA (with 2\nmemoryless nodes).\n\nBefore on the ppc64 box:\nTrying to clear the hugetlb pool\nDone. 0 free\nTrying to resize the pool to 100\nNode 0 HugePages_Free: 25\nNode 1 HugePages_Free: 75\nNode 2 HugePages_Free: 0\nNode 3 HugePages_Free: 0\nDone. Initially 100 free\nTrying to resize the pool to 200\nNode 0 HugePages_Free: 50\nNode 1 HugePages_Free: 150\nNode 2 HugePages_Free: 0\nNode 3 HugePages_Free: 0\nDone. 200 free\n\nAfter:\nTrying to clear the hugetlb pool\nDone. 0 free\nTrying to resize the pool to 100\nNode 0 HugePages_Free: 50\nNode 1 HugePages_Free: 50\nNode 2 HugePages_Free: 0\nNode 3 HugePages_Free: 0\nDone. Initially 100 free\nTrying to resize the pool to 200\nNode 0 HugePages_Free: 100\nNode 1 HugePages_Free: 100\nNode 2 HugePages_Free: 0\nNode 3 HugePages_Free: 0\nDone. 200 free\n\nSigned-off-by: Nishanth Aravamudan \u003cnacc@us.ibm.com\u003e\nAcked-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Adam Litke \u003cagl@us.ibm.com\u003e\nCc: David Gibson \u003chermes@gibson.dropbear.id.au\u003e\nCc: Badari Pulavarty \u003cpbadari@us.ibm.com\u003e\nCc: Ken Chen \u003ckenchen@google.com\u003e\nCc: William Lee Irwin III \u003cwli@holomorphy.com\u003e\nCc: Lee Schermerhorn \u003clee.schermerhorn@hp.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6b0c880dfefecedb9ad353014ed41505c32aca82", "tree": "2cf472a539f6de265deede9fb580be821bf9dda1", "parents": [ "e63e1e5a6b75416ab758025fd80e247c4f103b1b" ], "author": { "name": "Adam Litke", "email": "agl@us.ibm.com", "time": "Tue Oct 16 01:26:23 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:03 2007 -0700" }, "message": "hugetlb: fix pool resizing corner case\n\nWhen shrinking the size of the hugetlb pool via the nr_hugepages sysctl, we\nare careful to keep enough pages around to satisfy reservations. But the\ncalculation is flawed for the following scenario:\n\nAction Pool Counters (Total, Free, Resv)\n\u003d\u003d\u003d\u003d\u003d\u003d \u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\nSet pool to 1 page 1 1 0\nMap 1 page MAP_PRIVATE 1 1 0\nTouch the page to fault it in 1 0 0\nSet pool to 3 pages 3 2 0\nMap 2 pages MAP_SHARED 3 2 2\nSet pool to 2 pages 2 1 2 \u003c-- Mistake, should be 3 2 2\nTouch the 2 shared pages 2 0 1 \u003c-- Program crashes here\n\nThe last touch above will terminate the process due to lack of huge pages.\n\nThis patch corrects the calculation so that it factors in pages being used\nfor private mappings. Andrew, this is a standalone fix suitable for\nmainline. It is also now corrected in my latest dynamic pool resizing\npatchset which I will send out soon.\n\nSigned-off-by: Adam Litke \u003cagl@us.ibm.com\u003e\nAcked-by: Ken Chen \u003ckenchen@google.com\u003e\nCc: David Gibson \u003cdavid@gibson.dropbear.id.au\u003e\nCc: Badari Pulavarty \u003cpbadari@us.ibm.com\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": "54f9f80d6543fb7b157d3b11e2e7911dc1379790", "tree": "70d34e45f4d1694609db25da0ccad90b4b0ad473", "parents": [ "e4e574b767ba63101cfda2b42d72f38546319297" ], "author": { "name": "Adam Litke", "email": "agl@us.ibm.com", "time": "Tue Oct 16 01:26:20 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:02 2007 -0700" }, "message": "hugetlb: Add hugetlb_dynamic_pool sysctl\n\nThe maximum size of the huge page pool can be controlled using the overall\nsize of the hugetlb filesystem (via its \u0027size\u0027 mount option). However in the\ncommon case the this will not be set as the pool is traditionally fixed in\nsize at boot time. In order to maintain the expected semantics, we need to\nprevent the pool expanding by default.\n\nThis patch introduces a new sysctl controlling dynamic pool resizing. When\nthis is enabled the pool will expand beyond its base size up to the size of\nthe hugetlb filesystem. It is disabled by default.\n\nSigned-off-by: Adam Litke \u003cagl@us.ibm.com\u003e\nAcked-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nAcked-by: Dave McCracken \u003cdave.mccracken@oracle.com\u003e\nCc: William Irwin \u003cbill.irwin@oracle.com\u003e\nCc: David Gibson \u003cdavid@gibson.dropbear.id.au\u003e\nCc: Ken Chen \u003ckenchen@google.com\u003e\nCc: Badari Pulavarty \u003cpbadari@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": "e4e574b767ba63101cfda2b42d72f38546319297", "tree": "084b94d01c71ccd898f8df0ec441e6726e657e75", "parents": [ "7893d1d505d59db9d4f35165c8b6d3c6dff40a32" ], "author": { "name": "Adam Litke", "email": "agl@us.ibm.com", "time": "Tue Oct 16 01:26:19 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:02 2007 -0700" }, "message": "hugetlb: Try to grow hugetlb pool for MAP_SHARED mappings\n\nShared mappings require special handling because the huge pages needed to\nfully populate the VMA must be reserved at mmap time. If not enough pages are\navailable when making the reservation, allocate all of the shortfall at once\nfrom the buddy allocator and add the pages directly to the hugetlb pool. If\nthey cannot be allocated, then fail the mapping. The page surplus is\naccounted for in the same way as for private mappings; faulted surplus pages\nwill be freed at unmap time. Reserved, surplus pages that have not been used\nmust be freed separately when their reservation has been released.\n\nSigned-off-by: Adam Litke \u003cagl@us.ibm.com\u003e\nAcked-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nAcked-by: Dave McCracken \u003cdave.mccracken@oracle.com\u003e\nCc: William Irwin \u003cbill.irwin@oracle.com\u003e\nCc: David Gibson \u003cdavid@gibson.dropbear.id.au\u003e\nCc: Ken Chen \u003ckenchen@google.com\u003e\nCc: Badari Pulavarty \u003cpbadari@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": "7893d1d505d59db9d4f35165c8b6d3c6dff40a32", "tree": "6bea3b41e111b1d1774980296a032012a3926e9c", "parents": [ "6af2acb6619688046039234f716fd003e6ed2b3f" ], "author": { "name": "Adam Litke", "email": "agl@us.ibm.com", "time": "Tue Oct 16 01:26:18 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:02 2007 -0700" }, "message": "hugetlb: Try to grow hugetlb pool for MAP_PRIVATE mappings\n\nBecause we overcommit hugepages for MAP_PRIVATE mappings, it is possible that\nthe hugetlb pool will be exhausted or completely reserved when a hugepage is\nneeded to satisfy a page fault. Before killing the process in this situation,\ntry to allocate a hugepage directly from the buddy allocator.\n\nThe explicitly configured pool size becomes a low watermark. When dynamically\ngrown, the allocated huge pages are accounted as a surplus over the watermark.\n As huge pages are freed on a node, surplus pages are released to the buddy\nallocator so that the pool will shrink back to the watermark.\n\nSurplus accounting also allows for friendlier explicit pool resizing. When\nshrinking a pool that is fully in-use, increase the surplus so pages will be\nreturned to the buddy allocator as soon as they are freed. When growing a\npool that has a surplus, consume the surplus first and then allocate new\npages.\n\nSigned-off-by: Adam Litke \u003cagl@us.ibm.com\u003e\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nAcked-by: Dave McCracken \u003cdave.mccracken@oracle.com\u003e\nCc: William Irwin \u003cbill.irwin@oracle.com\u003e\nCc: David Gibson \u003cdavid@gibson.dropbear.id.au\u003e\nCc: Ken Chen \u003ckenchen@google.com\u003e\nCc: Badari Pulavarty \u003cpbadari@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": "6af2acb6619688046039234f716fd003e6ed2b3f", "tree": "6afd273778dcbc4b2706a793c756a1ccd00a44f3", "parents": [ "98f3cfc1dc7a53b629d43b7844a9b3f786213048" ], "author": { "name": "Adam Litke", "email": "agl@us.ibm.com", "time": "Tue Oct 16 01:26:16 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:02 2007 -0700" }, "message": "hugetlb: Move update_and_free_page\n\nDynamic huge page pool resizing.\n\nIn most real-world scenarios, configuring the size of the hugetlb pool\ncorrectly is a difficult task. If too few pages are allocated to the pool,\napplications using MAP_SHARED may fail to mmap() a hugepage region and\napplications using MAP_PRIVATE may receive SIGBUS. Isolating too much memory\nin the hugetlb pool means it is not available for other uses, especially those\nprograms not using huge pages.\n\nThe obvious answer is to let the hugetlb pool grow and shrink in response to\nthe runtime demand for huge pages. The work Mel Gorman has been doing to\nestablish a memory zone for movable memory allocations makes dynamically\nresizing the hugetlb pool reliable within the limits of that zone. This patch\nseries implements dynamic pool resizing for private and shared mappings while\nbeing careful to maintain existing semantics. Please reply with your comments\nand feedback; even just to say whether it would be a useful feature to you.\nThanks.\n\nHow it works\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\n\nUpon depletion of the hugetlb pool, rather than reporting an error immediately,\nfirst try and allocate the needed huge pages directly from the buddy allocator.\nCare must be taken to avoid unbounded growth of the hugetlb pool, so the\nhugetlb filesystem quota is used to limit overall pool size.\n\nThe real work begins when we decide there is a shortage of huge pages. What\nhappens next depends on whether the pages are for a private or shared mapping.\nPrivate mappings are straightforward. At fault time, if alloc_huge_page()\nfails, we allocate a page from the buddy allocator and increment the source\nnode\u0027s surplus_huge_pages counter. When free_huge_page() is called for a page\non a node with a surplus, the page is freed directly to the buddy allocator\ninstead of the hugetlb pool.\n\nBecause shared mappings require all of the pages to be reserved up front, some\nadditional work must be done at mmap() to support them. We determine the\nreservation shortage and allocate the required number of pages all at once.\nThese pages are then added to the hugetlb pool and marked reserved. Where that\nis not possible the mmap() will fail. As with private mappings, the\nappropriate surplus counters are updated. Since reserved huge pages won\u0027t\nnecessarily be used by the process, we can\u0027t be sure that free_huge_page() will\nalways be called to return surplus pages to the buddy allocator. To prevent\nthe huge page pool from bloating, we must free unused surplus pages when their\nreservation has ended.\n\nControlling it\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\n\nWith the entire patch series applied, pool resizing is off by default so unless\nspecific action is taken, the semantics are unchanged.\n\nTo take advantage of the flexibility afforded by this patch series one must\ntolerate a change in semantics. To control hugetlb pool growth, the following\ntechniques can be employed:\n\n * A sysctl tunable to enable/disable the feature entirely\n * The size\u003d mount option for hugetlbfs filesystems to limit pool size\n\nPerformance\n\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\n\nWhen contiguous memory is readily available, it is expected that the cost of\ndynamicly resizing the pool will be small. This series has been performance\ntested with \u0027stream\u0027 to measure this cost.\n\nStream (http://www.cs.virginia.edu/stream/) was linked with libhugetlbfs to\nenable remapping of the text and data/bss segments into huge pages.\n\nStream with small array\n-----------------------\nBaseline: \tnr_hugepages \u003d 0, No libhugetlbfs segment remapping\nPreallocated:\tnr_hugepages \u003d 5, Text and data/bss remapping\nDynamic:\tnr_hugepages \u003d 0, Text and data/bss remapping\n\n\t\t\t\tRate (MB/s)\nFunction\tBaseline\tPreallocated\tDynamic\nCopy:\t\t4695.6266\t5942.8371\t5982.2287\nScale:\t\t4451.5776\t5017.1419\t5658.7843\nAdd:\t\t5815.8849\t7927.7827\t8119.3552\nTriad:\t\t5949.4144\t8527.6492\t8110.6903\n\nStream with large array\n-----------------------\nBaseline: \tnr_hugepages \u003d 0, No libhugetlbfs segment remapping\nPreallocated:\tnr_hugepages \u003d 67, Text and data/bss remapping\nDynamic:\tnr_hugepages \u003d 0, Text and data/bss remapping\n\n\t\t\t\tRate (MB/s)\nFunction\tBaseline\tPreallocated\tDynamic\nCopy:\t\t2227.8281\t2544.2732\t2546.4947\nScale:\t\t2136.3208\t2430.7294\t2421.2074\nAdd:\t\t2773.1449\t4004.0021\t3999.4331\nTriad:\t\t2748.4502\t3777.0109\t3773.4970\n\n* All numbers are averages taken from 10 consecutive runs with a maximum\n standard deviation of 1.3 percent noted.\n\nThis patch:\n\nSimply move update_and_free_page() so that it can be reused later in this\npatch series. The implementation is not changed.\n\nSigned-off-by: Adam Litke \u003cagl@us.ibm.com\u003e\nAcked-by: Andy Whitcroft \u003capw@shadowen.org\u003e\nAcked-by: Dave McCracken \u003cdave.mccracken@oracle.com\u003e\nAcked-by: William Irwin \u003cbill.irwin@oracle.com\u003e\nCc: David Gibson \u003cdavid@gibson.dropbear.id.au\u003e\nCc: Ken Chen \u003ckenchen@google.com\u003e\nCc: Badari Pulavarty \u003cpbadari@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": "98f3cfc1dc7a53b629d43b7844a9b3f786213048", "tree": "de98ff0e3c25b01863c31abc0f3054de978b9ef8", "parents": [ "48e94196a533dbee17c252bf80d0310fb8c8c2eb" ], "author": { "name": "Yasunori Goto", "email": "y-goto@jp.fujitsu.com", "time": "Tue Oct 16 01:26:14 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:02 2007 -0700" }, "message": "memory hotplug: Hot-add with sparsemem-vmemmap\n\nThis patch is to avoid panic when memory hot-add is executed with\nsparsemem-vmemmap. Current vmemmap-sparsemem code doesn\u0027t support memory\nhot-add. Vmemmap must be populated when hot-add. This is for\n2.6.23-rc2-mm2.\n\nTodo: # Even if this patch is applied, the message \"[xxxx-xxxx] potential\n offnode page_structs\" is displayed. To allocate memmap on its node,\n memmap (and pgdat) must be initialized itself like chicken and\n egg relationship.\n\n # vmemmap_unpopulate will be necessary for followings.\n - For cancel hot-add due to error.\n - For unplug.\n\nSigned-off-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nCc: Andy Whitcroft \u003capw@shadowen.org\u003e\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "48e94196a533dbee17c252bf80d0310fb8c8c2eb", "tree": "9b29060b0e2600dc7da645fd436dc94c25d1fb36", "parents": [ "de33b821f34dc9e2fabf81a8ba464f3ef039bd00" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Tue Oct 16 01:26:14 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:02 2007 -0700" }, "message": "fix memory hot remove not configured case.\n\nNow, arch dependent code around CONFIG_MEMORY_HOTREMOVE is a mess.\nThis patch cleans up them. This is against 2.6.23-rc6-mm1.\n\n - fix compile failure on ia64/ CONFIG_MEMORY_HOTPLUG \u0026\u0026 !CONFIG_MEMORY_HOTREMOVE case.\n - For !CONFIG_MEMORY_HOTREMOVE, add generic no-op remove_memory(),\n which returns -EINVAL.\n - removed remove_pages() only used in powerpc.\n - removed no-op remove_memory() in i386, sh, sparc64, x86_64.\n\n - only powerpc returns -ENOSYS at memory hot remove(no-op). changes it\n to return -EINVAL.\n\nNote:\nCurrently, only ia64 supports CONFIG_MEMORY_HOTREMOVE. I welcome other\narchs if there are requirements and testers.\n\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": "0c0e6195896535481173df98935ad8db174f4d45", "tree": "2b35d3b81ba54b5d38e691d2a2019f4bcdfd1dce", "parents": [ "a5d76b54a3f3a40385d7f76069a2feac9f1bad63" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Tue Oct 16 01:26:12 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:02 2007 -0700" }, "message": "memory unplug: page offline\n\nLogic.\n - set all pages in [start,end) as isolated migration-type.\n by this, all free pages in the range will be not-for-use.\n - Migrate all LRU pages in the range.\n - Test all pages in the range\u0027s refcnt is zero or not.\n\nTodo:\n - allocate migration destination page from better area.\n - confirm page_count(page)\u003d\u003d 0 \u0026\u0026 PageReserved(page) page is safe to be freed..\n (I don\u0027t like this kind of page but..\n - Find out pages which cannot be migrated.\n - more running tests.\n - Use reclaim for unplugging other memory type area.\n\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Yasunori Goto \u003cy-goto@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "a5d76b54a3f3a40385d7f76069a2feac9f1bad63", "tree": "f58c432a4224b3be032bd4a4afa79dfa55d198a6", "parents": [ "75884fb1c6388f3713ddcca662f3647b3129aaeb" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Tue Oct 16 01:26:11 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:02 2007 -0700" }, "message": "memory unplug: page isolation\n\nImplement generic chunk-of-pages isolation method by using page grouping ops.\n\nThis patch add MIGRATE_ISOLATE to MIGRATE_TYPES. By this\n - MIGRATE_TYPES increases.\n - bitmap for migratetype is enlarged.\n\npages of MIGRATE_ISOLATE migratetype will not be allocated even if it is free.\nBy this, you can isolated *freed* pages from users. How-to-free pages is not\na purpose of this patch. You may use reclaim and migrate codes to free pages.\n\nIf start_isolate_page_range(start,end) is called,\n - migratetype of the range turns to be MIGRATE_ISOLATE if\n its type is MIGRATE_MOVABLE. (*) this check can be updated if other\n memory reclaiming works make progress.\n - MIGRATE_ISOLATE is not on migratetype fallback list.\n - All free pages and will-be-freed pages are isolated.\nTo check all pages in the range are isolated or not, use test_pages_isolated(),\nTo cancel isolation, use undo_isolate_page_range().\n\nChanges V6 -\u003e V7\n - removed unnecessary #ifdef\n\nThere are HOLES_IN_ZONE handling codes...I\u0027m glad if we can remove them..\n\nSigned-off-by: Yasunori Goto \u003cy-goto@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": "75884fb1c6388f3713ddcca662f3647b3129aaeb", "tree": "7debdd89fd94d099de3d3763b47af00ef6359d9d", "parents": [ "48f13bf3e742fca8aab87f6c39451d03bf5952d4" ], "author": { "name": "KAMEZAWA Hiroyuki", "email": "kamezawa.hiroyu@jp.fujitsu.com", "time": "Tue Oct 16 01:26:10 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:01 2007 -0700" }, "message": "memory unplug: memory hotplug cleanup\n\nA clean up patch for \"scanning memory resource [start, end)\" operation.\n\nNow, find_next_system_ram() function is used in memory hotplug, but this\ninterface is not easy to use and codes are complicated.\n\nThis patch adds walk_memory_resouce(start,len,arg,func) function.\nThe function \u0027func\u0027 is called per valid memory resouce range in [start,pfn).\n\n[pbadari@us.ibm.com: Error handling in walk_memory_resource()]\nSigned-off-by: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Badari Pulavarty \u003cpbadari@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": "48f13bf3e742fca8aab87f6c39451d03bf5952d4", "tree": "668160019ab157500a90655cf44f798ed3c77893", "parents": [ "ea3061d227816d00717446ac12b853d7ae04b4fe" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Oct 16 01:26:10 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:01 2007 -0700" }, "message": "Breakout page_order() to internal.h to avoid special knowledge of the buddy allocator\n\nThe statistics patch later needs to know what order a free page is on the free\nlists. Rather than having special knowledge of page_private() when\nPageBuddy() is set, this patch places out page_order() in internal.h and adds\na VM_BUG_ON to catch using it on non-PageBuddy pages.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nAcked-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": "ea3061d227816d00717446ac12b853d7ae04b4fe", "tree": "fa63e359433ba09481d0c758cdf54c877b29e5f0", "parents": [ "42a9fdbb12ac6c027b4b91ab9b5a60aa3a834489" ], "author": { "name": "Andrew Morton", "email": "akpm@linux-foundation.org", "time": "Tue Oct 16 01:26:09 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:01 2007 -0700" }, "message": "slub: list_locations() can use GFP_TEMPORARY\n\nIt\u0027s a short-lived allocation.\n\nCc: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "42a9fdbb12ac6c027b4b91ab9b5a60aa3a834489", "tree": "d319573849af86fa405b93e5b93add0d34305db7", "parents": [ "4c93c355d5d563f300df7e61ef753d7a064411e9" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Tue Oct 16 01:26:09 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:01 2007 -0700" }, "message": "SLUB: Optimize cacheline use for zeroing\n\nWe touch a cacheline in the kmem_cache structure for zeroing to get the\nsize. However, the hot paths in slab_alloc and slab_free do not reference\nany other fields in kmem_cache, so we may have to just bring in the\ncacheline for this one access.\n\nAdd a new field to kmem_cache_cpu that contains the object size. That\ncacheline must already be used in the hotpaths. So we save one cacheline\non every slab_alloc if we zero.\n\nWe need to update the kmem_cache_cpu object size if an aliasing operation\nchanges the objsize of an non debug slab.\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": "4c93c355d5d563f300df7e61ef753d7a064411e9", "tree": "24bcdbed58a51c69640da9c8e220dd5ce0c054a7", "parents": [ "ee3c72a14bfecdf783738032ff3c73ef6412f5b3" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Tue Oct 16 01:26:08 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:01 2007 -0700" }, "message": "SLUB: Place kmem_cache_cpu structures in a NUMA aware way\n\nThe kmem_cache_cpu structures introduced are currently an array placed in the\nkmem_cache struct. Meaning the kmem_cache_cpu structures are overwhelmingly\non the wrong node for systems with a higher amount of nodes. These are\nperformance critical structures since the per node information has\nto be touched for every alloc and free in a slab.\n\nIn order to place the kmem_cache_cpu structure optimally we put an array\nof pointers to kmem_cache_cpu structs in kmem_cache (similar to SLAB).\n\nHowever, the kmem_cache_cpu structures can now be allocated in a more\nintelligent way.\n\nWe would like to put per cpu structures for the same cpu but different\nslab caches in cachelines together to save space and decrease the cache\nfootprint. However, the slab allocators itself control only allocations\nper node. We set up a simple per cpu array for every processor with\n100 per cpu structures which is usually enough to get them all set up right.\nIf we run out then we fall back to kmalloc_node. This also solves the\nbootstrap problem since we do not have to use slab allocator functions\nearly in boot to get memory for the small per cpu structures.\n\nPro:\n\t- NUMA aware placement improves memory performance\n\t- All global structures in struct kmem_cache become readonly\n\t- Dense packing of per cpu structures reduces cacheline\n\t footprint in SMP and NUMA.\n\t- Potential avoidance of exclusive cacheline fetches\n\t on the free and alloc hotpath since multiple kmem_cache_cpu\n\t structures are in one cacheline. This is particularly important\n\t for the kmalloc array.\n\nCons:\n\t- Additional reference to one read only cacheline (per cpu\n\t array of pointers to kmem_cache_cpu) in both slab_alloc()\n\t and slab_free().\n\n[akinobu.mita@gmail.com: fix cpu hotplug offline/online path]\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nCc: \"Pekka Enberg\" \u003cpenberg@cs.helsinki.fi\u003e\nCc: Akinobu Mita \u003cakinobu.mita@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "ee3c72a14bfecdf783738032ff3c73ef6412f5b3", "tree": "876c2c5d33058be8502504330726bb16b876ba52", "parents": [ "b3fba8da653999c67d7517050f196e92da6f8d3b" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Tue Oct 16 01:26:07 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:01 2007 -0700" }, "message": "SLUB: Avoid touching page struct when freeing to per cpu slab\n\nSet c-\u003enode to -1 if we allocate from a debug slab instead for SlabDebug\nwhich requires access the page struct cacheline.\n\nSigned-off-by: Christoph Lameter \u003cclameter@sgi.com\u003e\nTested-by: Alexey Dobriyan \u003cadobriyan@sw.ru\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b3fba8da653999c67d7517050f196e92da6f8d3b", "tree": "12ee00ca91ceafe4fa9bb75d62debaf1feebb7b9", "parents": [ "8e65d24c7caf2a4c69b3ae0ce170bf3082ba359f" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Tue Oct 16 01:26:06 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:01 2007 -0700" }, "message": "SLUB: Move page-\u003eoffset to kmem_cache_cpu-\u003eoffset\n\nWe need the offset from the page struct during slab_alloc and slab_free. In\nboth cases we also reference the cacheline of the kmem_cache_cpu structure.\nWe can therefore move the offset field into the kmem_cache_cpu structure\nfreeing up 16 bits in the page struct.\n\nMoving the offset allows an allocation from slab_alloc() without touching the\npage struct in the hot path.\n\nThe only thing left in slab_free() that touches the page struct cacheline for\nper cpu freeing is the checking of SlabDebug(page). The next patch deals with\nthat.\n\nUse the available 16 bits to broaden page-\u003einuse. More than 64k objects per\nslab become possible and we can get rid of the checks for that limitation.\n\nNo need anymore to shrink the order of slabs if we boot with 2M sized slabs\n(slub_min_order\u003d9).\n\nNo need anymore to switch off the offset calculation for very large slabs\nsince the field in the kmem_cache_cpu structure is 32 bits and so the offset\nfield can now handle slab sizes of up to 8GB.\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": "8e65d24c7caf2a4c69b3ae0ce170bf3082ba359f", "tree": "4f690448c1363bf02f74abd9293126c3e3a9e4c9", "parents": [ "dfb4f09609827301740ef0a11b37530d190f1681" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Tue Oct 16 01:26:06 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:01 2007 -0700" }, "message": "SLUB: Do not use page-\u003emapping\n\nAfter moving the lockless_freelist to kmem_cache_cpu we no longer need\npage-\u003elockless_freelist. Restructure the use of the struct page fields in\nsuch a way that we never touch the mapping field.\n\nThis is turn allows us to remove the special casing of SLUB when determining\nthe mapping of a page (needed for corner cases of virtual caches machines that\nneed to flush caches of processors mapping a page).\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": "dfb4f09609827301740ef0a11b37530d190f1681", "tree": "eb4d13d8699cf01abada9f45e1670cc601fb4b00", "parents": [ "484f51f820199ab3e0ef15d08f1b6be20f53bf39" ], "author": { "name": "Christoph Lameter", "email": "clameter@sgi.com", "time": "Tue Oct 16 01:26:05 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:01 2007 -0700" }, "message": "SLUB: Avoid page struct cacheline bouncing due to remote frees to cpu slab\n\nA remote free may access the same page struct that also contains the lockless\nfreelist for the cpu slab. If objects have a short lifetime and are freed by\na different processor then remote frees back to the slab from which we are\ncurrently allocating are frequent. The cacheline with the page struct needs\nto be repeately acquired in exclusive mode by both the allocating thread and\nthe freeing thread. If this is frequent enough then performance will suffer\nbecause of cacheline bouncing.\n\nThis patchset puts the lockless_freelist pointer in its own cacheline. In\norder to make that happen we introduce a per cpu structure called\nkmem_cache_cpu.\n\nInstead of keeping an array of pointers to page structs we now keep an array\nto a per cpu structure that--among other things--contains the pointer to the\nlockless freelist. The freeing thread can then keep possession of exclusive\naccess to the page struct cacheline while the allocating thread keeps its\nexclusive access to the cacheline containing the per cpu structure.\n\nThis works as long as the allocating cpu is able to service its request\nfrom the lockless freelist. If the lockless freelist runs empty then the\nallocating thread needs to acquire exclusive access to the cacheline with\nthe page struct lock the slab.\n\nThe allocating thread will then check if new objects were freed to the per\ncpu slab. If so it will keep the slab as the cpu slab and continue with the\nrecently remote freed objects. So the allocating thread can take a series\nof just freed remote pages and dish them out again. Ideally allocations\ncould be just recycling objects in the same slab this way which will lead\nto an ideal allocation / remote free pattern.\n\nThe number of objects that can be handled in this way is limited by the\ncapacity of one slab. Increasing slab size via slub_min_objects/\nslub_max_order may increase the number of objects and therefore performance.\n\nIf the allocating thread runs out of objects and finds that no objects were\nput back by the remote processor then it will retrieve a new slab (from the\npartial lists or from the page allocator) and start with a whole\nnew set of objects while the remote thread may still be freeing objects to\nthe old cpu slab. This may then repeat until the new slab is also exhausted.\nIf remote freeing has freed objects in the earlier slab then that earlier\nslab will now be on the partial freelist and the allocating thread will\npick that slab next for allocation. So the loop is extended. However,\nboth threads need to take the list_lock to make the swizzling via\nthe partial list happen.\n\nIt is likely that this kind of scheme will keep the objects being passed\naround to a small set that can be kept in the cpu caches leading to increased\nperformance.\n\nMore code cleanups become possible:\n\n- Instead of passing a cpu we can now pass a kmem_cache_cpu structure around.\n Allows reducing the number of parameters to various functions.\n- Can define a new node_match() function for NUMA to encapsulate locality\n checks.\n\nEffect on allocations:\n\nCachelines touched before this patch:\n\n\tWrite:\tpage cache struct and first cacheline of object\n\nCachelines touched after this patch:\n\n\tWrite:\tkmem_cache_cpu cacheline and first cacheline of object\n\tRead: page cache struct (but see later patch that avoids touching\n\t\tthat cacheline)\n\nThe handling when the lockless alloc list runs empty gets to be a bit more\ncomplicated since another cacheline has now to be written to. But that is\nhalfway out of the hot path.\n\nEffect on freeing:\n\nCachelines touched before this patch:\n\n\tWrite: page_struct and first cacheline of object\n\nCachelines touched after this patch depending on how we free:\n\n Write(to cpu_slab):\tkmem_cache_cpu struct and first cacheline of object\n Write(to other):\tpage struct and first cacheline of object\n\n Read(to cpu_slab):\tpage struct to id slab etc. (but see later patch that\n \t\t\tavoids touching the page struct on free)\n Read(to other):\tcpu local kmem_cache_cpu struct to verify its not\n \t\t\tthe cpu slab.\n\nSummary:\n\nPro:\n\t- Distinct cachelines so that concurrent remote frees and local\n\t allocs on a cpuslab can occur without cacheline bouncing.\n\t- Avoids potential bouncing cachelines because of neighboring\n\t per cpu pointer updates in kmem_cache\u0027s cpu_slab structure since\n\t it now grows to a cacheline (Therefore remove the comment\n\t that talks about that concern).\n\nCons:\n\t- Freeing objects now requires the reading of one additional\n\t cacheline. That can be mitigated for some cases by the following\n\t patches but its not possible to completely eliminate these\n\t references.\n\n\t- Memory usage grows slightly.\n\n\tThe size of each per cpu object is blown up from one word\n\t(pointing to the page_struct) to one cacheline with various data.\n\tSo this is NR_CPUS*NR_SLABS*L1_BYTES more memory use. Lets say\n\tNR_SLABS is 100 and a cache line size of 128 then we have just\n\tincreased SLAB metadata requirements by 12.8k per cpu.\n\t(Another later patch reduces these requirements)\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": "484f51f820199ab3e0ef15d08f1b6be20f53bf39", "tree": "eea15a3cb546463488595e7a5fae8628a5dd7877", "parents": [ "467c996c1e1910633fa8e7adc9b052aa3ed5f97c" ], "author": { "name": "Adrian Bunk", "email": "bunk@stusta.de", "time": "Tue Oct 16 01:26:03 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:01 2007 -0700" }, "message": "mm/page_alloc.c: make code static\n\nThis patch makes needlessly global code static.\n\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": "467c996c1e1910633fa8e7adc9b052aa3ed5f97c", "tree": "09e0e70160386be1bdaa12801afddf287e12c8a1", "parents": [ "d9c2340052278d8eb2ffb16b0484f8f794def4de" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Oct 16 01:26:02 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:00 2007 -0700" }, "message": "Print out statistics in relation to fragmentation avoidance to /proc/pagetypeinfo\n\nThis patch provides fragmentation avoidance statistics via /proc/pagetypeinfo.\n The information is collected only on request so there is no runtime overhead.\n The statistics are in three parts:\n\nThe first part prints information on the size of blocks that pages are\nbeing grouped on and looks like\n\nPage block order: 10\nPages per block: 1024\n\nThe second part is a more detailed version of /proc/buddyinfo and looks like\n\nFree pages count per migrate type at order 0 1 2 3 4 5 6 7 8 9 10\nNode 0, zone DMA, type Unmovable 0 0 0 0 0 0 0 0 0 0 0\nNode 0, zone DMA, type Reclaimable 1 0 0 0 0 0 0 0 0 0 0\nNode 0, zone DMA, type Movable 0 0 0 0 0 0 0 0 0 0 0\nNode 0, zone DMA, type Reserve 0 4 4 0 0 0 0 1 0 1 0\nNode 0, zone Normal, type Unmovable 111 8 4 4 2 3 1 0 0 0 0\nNode 0, zone Normal, type Reclaimable 293 89 8 0 0 0 0 0 0 0 0\nNode 0, zone Normal, type Movable 1 6 13 9 7 6 3 0 0 0 0\nNode 0, zone Normal, type Reserve 0 0 0 0 0 0 0 0 0 0 4\n\nThe third part looks like\n\nNumber of blocks type Unmovable Reclaimable Movable Reserve\nNode 0, zone DMA 0 1 2 1\nNode 0, zone Normal 3 17 94 4\n\nTo walk the zones within a node with interrupts disabled, walk_zones_in_node()\nis introduced and shared between /proc/buddyinfo, /proc/zoneinfo and\n/proc/pagetypeinfo to reduce code duplication. It seems specific to what\nvmstat.c requires but could be broken out as a general utility function in\nmmzone.c if there were other other potential users.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-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": "d9c2340052278d8eb2ffb16b0484f8f794def4de", "tree": "aec7e4e11473a4fcdfd389c718544780a042c6df", "parents": [ "d100313fd615cc30374ff92e0b3facb053838330" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Oct 16 01:26:01 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:00 2007 -0700" }, "message": "Do not depend on MAX_ORDER when grouping pages by mobility\n\nCurrently mobility grouping works at the MAX_ORDER_NR_PAGES level. This makes\nsense for the majority of users where this is also the huge page size.\nHowever, on platforms like ia64 where the huge page size is runtime\nconfigurable it is desirable to group at a lower order. On x86_64 and\noccasionally on x86, the hugepage size may not always be MAX_ORDER_NR_PAGES.\n\nThis patch groups pages together based on the value of HUGETLB_PAGE_ORDER. It\nuses a compile-time constant if possible and a variable where the huge page\nsize is runtime configurable.\n\nIt is assumed that grouping should be done at the lowest sensible order and\nthat the user would not want to override this. If this is not true,\npage_block order could be forced to a variable initialised via a boot-time\nkernel parameter.\n\nOne potential issue with this patch is that IA64 now parses hugepagesz with\nearly_param() instead of __setup(). __setup() is called after the memory\nallocator has been initialised and the pageblock bitmaps already setup. In\ntests on one IA64 there did not seem to be any problem with using\nearly_param() and in fact may be more correct as it guarantees the parameter\nis handled before the parsing of hugepages\u003d.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-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": "d100313fd615cc30374ff92e0b3facb053838330", "tree": "f0bcd5e3b07bee40a65182c63b54baceca366849", "parents": [ "64c5e135bf5a2a7f0ededb3435a31adbe0202f0c" ], "author": { "name": "Mel Gorman", "email": "mel@csn.ul.ie", "time": "Tue Oct 16 01:26:00 2007 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@woody.linux-foundation.org", "time": "Tue Oct 16 09:43:00 2007 -0700" }, "message": "Fix calculation in move_freepages_block for counting pages\n\nmove_freepages_block() returns the number of blocks moved. This value is used\nto determine if a block of pages should be stolen for the exclusive use of a\nmigrate type or not. However, the value returned is being used correctly.\nThis patch fixes the calculation to return the number of base pages that have\nbeen moved.\n\nThis should be considered a fix to the patch\nmove-free-pages-between-lists-on-steal.patch\n\nCredit to Andy Whitcroft for spotting the problem.\n\nSigned-off-by: Mel Gorman \u003cmel@csn.ul.ie\u003e\nAcked-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" } ], "next": "64c5e135bf5a2a7f0ededb3435a31adbe0202f0c" }