)]}' { "log": [ { "commit": "aab008db8063364dc3c8ccf4981c21124866b395", "tree": "72914203f4decb023efdaabd0301a62d742dfa8c", "parents": [ "4f5b1affdda3e0c48cac674182f52004137b0ffc", "16c0cfa425b8e1488f7a1873bd112a7a099325f0" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 19:52:47 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 22 19:52:47 2012 -0700" }, "message": "Merge tag \u0027stable/for-linus-3.4\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/mm\n\nPull cleancache changes from Konrad Rzeszutek Wilk:\n \"This has some patches for the cleancache API that should have been\n submitted a _long_ time ago. They are basically cleanups:\n\n - rename of flush to invalidate\n\n - moving reporting of statistics into debugfs\n\n - use __read_mostly as necessary.\n\n Oh, and also the MAINTAINERS file change. The files (except the\n MAINTAINERS file) have been in #linux-next for months now. The late\n addition of MAINTAINERS file is a brain-fart on my side - didn\u0027t\n realize I needed that just until I was typing this up - and I based\n that patch on v3.3 - so the tree is on top of v3.3.\"\n\n* tag \u0027stable/for-linus-3.4\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/mm:\n MAINTAINERS: Adding cleancache API to the list.\n mm: cleancache: Use __read_mostly as appropiate.\n mm: cleancache: report statistics via debugfs instead of sysfs.\n mm: zcache/tmem/cleancache: s/flush/invalidate/\n mm: cleancache: s/flush/invalidate/\n" }, { "commit": "3556485f1595e3964ba539e39ea682acbb835cee", "tree": "7f5ee254f425b1427ac0059b5f347a307f8538a1", "parents": [ "b8716614a7cc2fc15ea2a518edd04755fb08d922", "09f61cdbb32a9d812c618d3922db533542736bb0" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 13:25:04 2012 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Mar 21 13:25:04 2012 -0700" }, "message": "Merge branch \u0027next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security\n\nPull security subsystem updates for 3.4 from James Morris:\n \"The main addition here is the new Yama security module from Kees Cook,\n which was discussed at the Linux Security Summit last year. Its\n purpose is to collect miscellaneous DAC security enhancements in one\n place. This also marks a departure in policy for LSM modules, which\n were previously limited to being standalone access control systems.\n Chromium OS is using Yama, and I believe there are plans for Ubuntu,\n at least.\n\n This patchset also includes maintenance updates for AppArmor, TOMOYO\n and others.\"\n\nFix trivial conflict in \u003cnet/sock.h\u003e due to the jumo_label-\u003estatic_key\nrename.\n\n* \u0027next\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (38 commits)\n AppArmor: Fix location of const qualifier on generated string tables\n TOMOYO: Return error if fails to delete a domain\n AppArmor: add const qualifiers to string arrays\n AppArmor: Add ability to load extended policy\n TOMOYO: Return appropriate value to poll().\n AppArmor: Move path failure information into aa_get_name and rename\n AppArmor: Update dfa matching routines.\n AppArmor: Minor cleanup of d_namespace_path to consolidate error handling\n AppArmor: Retrieve the dentry_path for error reporting when path lookup fails\n AppArmor: Add const qualifiers to generated string tables\n AppArmor: Fix oops in policy unpack auditing\n AppArmor: Fix error returned when a path lookup is disconnected\n KEYS: testing wrong bit for KEY_FLAG_REVOKED\n TOMOYO: Fix mount flags checking order.\n security: fix ima kconfig warning\n AppArmor: Fix the error case for chroot relative path name lookup\n AppArmor: fix mapping of META_READ to audit and quiet flags\n AppArmor: Fix underflow in xindex calculation\n AppArmor: Fix dropping of allowed operations that are force audited\n AppArmor: Add mising end of structure test to caps unpacking\n ...\n" }, { "commit": "16c0cfa425b8e1488f7a1873bd112a7a099325f0", "tree": "eeba5728a8072096279c55ffc10a5ca7ac0ddf05", "parents": [ "94574d9a4c236e8bd19721b4adb0ea30ef446901", "072611ed1f291053a74b28b813d683a09495eba7" ], "author": { "name": "Konrad Rzeszutek Wilk", "email": "konrad.wilk@oracle.com", "time": "Mon Mar 19 12:12:19 2012 -0400" }, "committer": { "name": "Konrad Rzeszutek Wilk", "email": "konrad.wilk@oracle.com", "time": "Mon Mar 19 12:12:19 2012 -0400" }, "message": "Merge branch \u0027stable/cleancache.v13\u0027 into linux-next\n\n* stable/cleancache.v13:\n mm: cleancache: Use __read_mostly as appropiate.\n mm: cleancache: report statistics via debugfs instead of sysfs.\n mm: zcache/tmem/cleancache: s/flush/invalidate/\n mm: cleancache: s/flush/invalidate/\n" }, { "commit": "6b6dc836a195e077e76977b6c020a73de411b46d", "tree": "59920a3aab6db4997f6b7a95c753219bdc12bd64", "parents": [ "074b85175a43a23fdbde60f55feea636e0bf0f85" ], "author": { "name": "Jan Kara", "email": "jack@suse.cz", "time": "Fri Feb 10 11:03:00 2012 +0100" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Feb 13 20:45:38 2012 -0500" }, "message": "vfs: Provide function to get superblock and wait for it to thaw\n\nIn quota code we need to find a superblock corresponding to a device and wait\nfor superblock to be unfrozen. However this waiting has to happen without\ns_umount semaphore because that is required for superblock to thaw. So provide\na function in VFS for this to keep dances with s_umount where they belong.\n\n[AV: implementation switched to saner variant]\n\nSigned-off-by: Jan Kara \u003cjack@suse.cz\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "4040153087478993cbf0809f444400a3c808074c", "tree": "2dc7af85b0cf930f1656553bd38410b8c16601a6", "parents": [ "191c542442fdf53cc3c496c00be13367fd9cd42d" ], "author": { "name": "Al Viro", "email": "viro@ftp.linux.org.uk", "time": "Mon Feb 13 03:58:52 2012 +0000" }, "committer": { "name": "James Morris", "email": "jmorris@namei.org", "time": "Tue Feb 14 10:45:42 2012 +1100" }, "message": "security: trim security.h\n\nTrim security.h\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: James Morris \u003cjmorris@namei.org\u003e\n" }, { "commit": "3167760f83899ccda312b9ad9306ec9e5dda06d4", "tree": "a040add1a9b267cb0fa92847c88526c1329a258b", "parents": [ "972b2c719990f91eb3b2310d44ef8a2d38955a14" ], "author": { "name": "Dan Magenheimer", "email": "dan.magenheimer@oracle.com", "time": "Wed Sep 21 11:56:28 2011 -0400" }, "committer": { "name": "Konrad Rzeszutek Wilk", "email": "konrad.wilk@oracle.com", "time": "Mon Jan 23 16:06:24 2012 -0500" }, "message": "mm: cleancache: s/flush/invalidate/\n\nPer akpm suggestions alter the use of the term flush to be\ninvalidate. The next patch will do this across all MM.\n\nThis change is completely cosmetic.\n\n[v9: akpm@linux-foundation.org: change \"flush\" to \"invalidate\", part 3]\n\nSigned-off-by: Dan Magenheimer \u003cdan.magenheimer@oracle.com\u003e\nCc: Kamezawa Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nCc: Jan Beulich \u003cJBeulich@novell.com\u003e\nReviewed-by: Seth Jennings \u003csjenning@linux.vnet.ibm.com\u003e\nCc: Jeremy Fitzhardinge \u003cjeremy@goop.org\u003e\nCc: Hugh Dickins \u003chughd@google.com\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Nitin Gupta \u003cngupta@vflare.org\u003e\nCc: Matthew Wilcox \u003cmatthew@wil.cx\u003e\nCc: Chris Mason \u003cchris.mason@oracle.com\u003e\nCc: Rik Riel \u003criel@redhat.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\n[v10: Fixed fs: move code out of buffer.c conflict change]\nSigned-off-by: Konrad Rzeszutek Wilk \u003ckonrad.wilk@oracle.com\u003e\n" }, { "commit": "e1616300a20c80396109c1cf013ba9a36055a3da", "tree": "97d4bcef12fddf1dc1cdfd22bf226eb36850c6e6", "parents": [ "c2bc3a316a7281f67e36b34dac2802cbe36a9128" ], "author": { "name": "Kazuya Mio", "email": "k-mio@sx.jp.nec.com", "time": "Thu Dec 01 16:51:07 2011 +0900" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue Jan 17 16:38:47 2012 -0500" }, "message": "wake up s_wait_unfrozen when -\u003efreeze_fs fails\n\ndd slept infinitely when fsfeeze failed because of EIO.\nTo fix this problem, if -\u003efreeze_fs fails, freeze_super() wakes up\nthe tasks waiting for the filesystem to become unfrozen.\n\nWhen s_frozen isn\u0027t SB_UNFROZEN in __generic_file_aio_write(),\nthe function sleeps until FITHAW ioctl wakes up s_wait_unfrozen.\n\nHowever, if -\u003efreeze_fs fails, s_frozen is set to SB_UNFROZEN and then\nfreeze_super() returns an error number. In this case, FITHAW ioctl returns\nEINVAL because s_frozen is already SB_UNFROZEN. There is no way to wake up\ns_wait_unfrozen, so __generic_file_aio_write() sleeps infinitely.\n\nSigned-off-by: Kazuya Mio \u003ck-mio@sx.jp.nec.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "8e8b87964bc8dc5c14b6543fc933b7725f07d3ac", "tree": "9a14c135741f3a8ba960ff97f060a58597604a6d", "parents": [ "7ada4db88634429f4da690ad1c4eb73c93085f0c" ], "author": { "name": "Miklos Szeredi", "email": "mszeredi@suse.cz", "time": "Mon Nov 21 12:11:33 2011 +0100" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Jan 06 23:20:13 2012 -0500" }, "message": "vfs: prevent remount read-only if pending removes\n\nIf there are any inodes on the super block that have been unlinked\n(i_nlink \u003d\u003d 0) but have not yet been deleted then prevent the\nremounting the super block read-only.\n\nReported-by: Toshiyuki Okajima \u003ctoshi.okajima@jp.fujitsu.com\u003e\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nTested-by: Toshiyuki Okajima \u003ctoshi.okajima@jp.fujitsu.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "4ed5e82fe77f4147cf386327c9a63a2dd7eff518", "tree": "f4eaeefaf5d293014457892ac31f878eece07331", "parents": [ "39f7c4db1d2d9e2e2a90abdf34811783089d217d" ], "author": { "name": "Miklos Szeredi", "email": "mszeredi@suse.cz", "time": "Mon Nov 21 12:11:31 2011 +0100" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Jan 06 23:20:12 2012 -0500" }, "message": "vfs: protect remounting superblock read-only\n\nCurrently remouting superblock read-only is racy in a major way.\n\nWith the per mount read-only infrastructure it is now possible to\nprevent most races, which this patch attempts.\n\nBefore starting the remount read-only, iterate through all mounts\nbelonging to the superblock and if none of them have any pending\nwrites, set sb-\u003es_readonly_remount. This indicates that remount is in\nprogress and no further write requests are allowed. If the remount\nsucceeds set MS_RDONLY and reset s_readonly_remount.\n\nIf the remounting is unsuccessful just reset s_readonly_remount.\nThis can result in transient EROFS errors, despite the fact the\nremount failed. Unfortunately hodling off writes is difficult as\nremount itself may touch the filesystem (e.g. through load_nls())\nwhich would deadlock.\n\nA later patch deals with delayed writes due to nlink going to zero.\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nTested-by: Toshiyuki Okajima \u003ctoshi.okajima@jp.fujitsu.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "39f7c4db1d2d9e2e2a90abdf34811783089d217d", "tree": "cbc3496ce21e26b5891bb4c4d4155853317ddfb3", "parents": [ "34c80b1d93e6e20ca9dea0baf583a5b5510d92d4" ], "author": { "name": "Miklos Szeredi", "email": "mszeredi@suse.cz", "time": "Mon Nov 21 12:11:30 2011 +0100" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Jan 06 23:20:12 2012 -0500" }, "message": "vfs: keep list of mounts for each superblock\n\nKeep track of vfsmounts belonging to a superblock. List is protected\nby vfsmount_lock.\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nTested-by: Toshiyuki Okajima \u003ctoshi.okajima@jp.fujitsu.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "dabe0dc194d5d56d379a8994fff47392744b6491", "tree": "16696a688d5b6386c6183cc6137807af38e1d9d1", "parents": [ "cf31e70d6cf93f19fe9bf1144966ef40991ac723" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue Jan 03 21:01:29 2012 -0500" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue Jan 03 22:53:10 2012 -0500" }, "message": "vfs: fix the rest of sget() races\n\nunfortunately, just checking MS_BORN after having grabbed -\u003es_umount in\nsget() is not enough; places that pick superblock from a list and\ngrab s_umount shared need the same check in addition to checking for\n-\u003es_root; otherwise three-way race between failing mount, sget() and\nsuch list-walker can leave us with list-walker coming *second*, when\ntemporary active ref grabbed by sget() (to be dropped when sget()\nnotices that original mount has failed by checking MS_BORN) has\nlead to deactivate_locked_super() from failing -\u003emount() *not* doing\n-\u003ekill_sb() and just releasing -\u003es_umount. Once sget() gets through\nand notices that MS_BORN had never been set it will drop the active\nref and fs will be shut down and kicked out of all lists, but it\u0027s\ntoo late for something like sync_supers().\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "a5166169f9b920cae3c503910cb66a3ac5dd846d", "tree": "ba62f9f2227c4eff9ad6d473f674f72443fba0fb", "parents": [ "5352d3b65ae6f38e71e16f704414c1db4b4f7228" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Dec 12 22:53:00 2011 -0500" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue Jan 03 22:52:39 2012 -0500" }, "message": "vfs: convert fs_supers to hlist\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "f47ec3f28354795f000c14bf18ed967ec81a3ec3", "tree": "662d479706bd948963ad3f9f00c2e6caedbe5a92", "parents": [ "5ede7b1cfa8201418fb35e12f770e9e7c2559a4d" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Nov 21 21:15:42 2011 -0500" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue Jan 03 22:52:35 2012 -0500" }, "message": "trim fs/internal.h\n\nsome stuff in there can actually become static; some belongs to pnode.h\nas it\u0027s a private interface between namespace.c and pnode.c...\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "2833eb2b465a274d1a2529fed76c6d2904f8022b", "tree": "ac1fedbdc0468e5e9450b4a679a0ee0dc268971f", "parents": [ "1fa1e7f615f4d3ae436fa319af6e4eebdd4026a8" ], "author": { "name": "Miklos Szeredi", "email": "mszeredi@suse.cz", "time": "Fri Oct 28 14:13:20 2011 +0200" }, "committer": { "name": "Christoph Hellwig", "email": "hch@serles.lst.de", "time": "Wed Nov 02 12:53:42 2011 +0100" }, "message": "vfs: ignore error on forced remount\n\nOn emergency remount we want to force MS_RDONLY on the super block\neven if -\u003eremount_fs() failed for some reason.\n\nSigned-off-by: Miklos Szeredi \u003cmszeredi@suse.cz\u003e\nTested-by: Toshiyuki Okajima \u003ctoshi.okajima@jp.fujitsu.com\u003e\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\n" }, { "commit": "09f363c7363eb10cfb4b82094bd7064e5608258b", "tree": "4b1890150cf7f7a2339694ea97efa6c45b8705a1", "parents": [ "20c8c62891a346e09c8d26de41ce78bd7a76c5b0" ], "author": { "name": "Mikulas Patocka", "email": "mpatocka@redhat.com", "time": "Mon Oct 31 17:08:57 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Oct 31 17:30:49 2011 -0700" }, "message": "vmscan: fix shrinker callback bug in fs/super.c\n\nThe callback must not return -1 when nr_to_scan is zero. Fix the bug in\nfs/super.c and add this requirement to the callback specification.\n\nSigned-off-by: Mikulas Patocka \u003cmpatocka@redhat.com\u003e\nCc: Dave Chinner \u003cdavid@fromorbit.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "096a705bbc080a4041636d07514560da8d78acbe", "tree": "38c3c01225709ffa53419083ea6332f8a72610de", "parents": [ "fea80311a939a746533a6d7e7c3183729d6a3faf", "5757a6d76cdf6dda2a492c09b985c015e86779b1" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jul 25 10:33:36 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Jul 25 10:33:36 2011 -0700" }, "message": "Merge branch \u0027for-3.1/core\u0027 of git://git.kernel.dk/linux-block\n\n* \u0027for-3.1/core\u0027 of git://git.kernel.dk/linux-block: (24 commits)\n block: strict rq_affinity\n backing-dev: use synchronize_rcu_expedited instead of synchronize_rcu\n block: fix patch import error in max_discard_sectors check\n block: reorder request_queue to remove 64 bit alignment padding\n CFQ: add think time check for group\n CFQ: add think time check for service tree\n CFQ: move think time check variables to a separate struct\n fixlet: Remove fs_excl from struct task.\n cfq: Remove special treatment for metadata rqs.\n block: document blk_plug list access\n block: avoid building too big plug list\n compat_ioctl: fix make headers_check regression\n block: eliminate potential for infinite loop in blkdev_issue_discard\n compat_ioctl: fix warning caused by qemu\n block: flush MEDIA_CHANGE from drivers on close(2)\n blk-throttle: Make total_nr_queued unsigned\n block: Add __attribute__((format(printf...) and fix fallout\n fs/partitions/check.c: make local symbols static\n block:remove some spare spaces in genhd.c\n block:fix the comment error in blkdev.h\n ...\n" }, { "commit": "8ab47664d51a69ea79fe70bb07ca80664f74f76b", "tree": "a0cc73a909840edfb23b4b4490c39fd222cce0fa", "parents": [ "0e1fdafd93980eac62e778798549ce0f6073905c" ], "author": { "name": "Dave Chinner", "email": "dchinner@redhat.com", "time": "Fri Jul 08 14:14:45 2011 +1000" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Jul 20 20:47:41 2011 -0400" }, "message": "vfs: increase shrinker batch size\n\nNow that the per-sb shrinker is responsible for shrinking 2 or more\ncaches, increase the batch size to keep econmies of scale for\nshrinking each cache. Increase the shrinker batch size to 1024\nobjects.\n\nTo allow for a large increase in batch size, add a conditional\nreschedule to prune_icache_sb() so that we don\u0027t hold the LRU spin\nlock for too long. This mirrors the behaviour of the\n__shrink_dcache_sb(), and allows us to increase the batch size\nwithout needing to worry about problems caused by long lock hold\ntimes.\n\nTo ensure that filesystems using the per-sb shrinker callouts don\u0027t\ncause problems, document that the object freeing method must\nreschedule appropriately inside loops.\n\nSigned-off-by: Dave Chinner \u003cdchinner@redhat.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "0e1fdafd93980eac62e778798549ce0f6073905c", "tree": "a8b21525d195d436fa738e9a470e64eaa21e6736", "parents": [ "4f8c19fdf3f97402b68f058b1c72a6c7166c9e59" ], "author": { "name": "Dave Chinner", "email": "dchinner@redhat.com", "time": "Fri Jul 08 14:14:44 2011 +1000" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Jul 20 20:47:41 2011 -0400" }, "message": "superblock: add filesystem shrinker operations\n\nNow we have a per-superblock shrinker implementation, we can add a\nfilesystem specific callout to it to allow filesystem internal\ncaches to be shrunk by the superblock shrinker.\n\nRather than perpetuate the multipurpose shrinker callback API (i.e.\nnr_to_scan \u003d\u003d 0 meaning \"tell me how many objects freeable in the\ncache), two operations will be added. The first will return the\nnumber of objects that are freeable, the second is the actual\nshrinker call.\n\nSigned-off-by: Dave Chinner \u003cdchinner@redhat.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "b0d40c92adafde7c2d81203ce7c1c69275f41140", "tree": "f75a19dcd1a37aff23dc43323b58f014b1297c6b", "parents": [ "12ad3ab66103e6582ca69c0c9de18b13487eaaef" ], "author": { "name": "Dave Chinner", "email": "dchinner@redhat.com", "time": "Fri Jul 08 14:14:42 2011 +1000" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Jul 20 20:47:10 2011 -0400" }, "message": "superblock: introduce per-sb cache shrinker infrastructure\n\nWith context based shrinkers, we can implement a per-superblock\nshrinker that shrinks the caches attached to the superblock. We\ncurrently have global shrinkers for the inode and dentry caches that\nsplit up into per-superblock operations via a coarse proportioning\nmethod that does not batch very well. The global shrinkers also\nhave a dependency - dentries pin inodes - so we have to be very\ncareful about how we register the global shrinkers so that the\nimplicit call order is always correct.\n\nWith a per-sb shrinker callout, we can encode this dependency\ndirectly into the per-sb shrinker, hence avoiding the need for\nstrictly ordering shrinker registrations. We also have no need for\nany proportioning code for the shrinker subsystem already provides\nthis functionality across all shrinkers. Allowing the shrinker to\noperate on a single superblock at a time means that we do less\nsuperblock list traversals and locking and reclaim should batch more\neffectively. This should result in less CPU overhead for reclaim and\npotentially faster reclaim of items from each filesystem.\n\nSigned-off-by: Dave Chinner \u003cdchinner@redhat.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "12ad3ab66103e6582ca69c0c9de18b13487eaaef", "tree": "52d1ecd11d48faa7e6f8d6600c8e76807b0985a5", "parents": [ "09cc9fc7a7c3d872065426d7fb0f0ad6d3eb90fc" ], "author": { "name": "Dave Chinner", "email": "dchinner@redhat.com", "time": "Fri Jul 08 14:14:41 2011 +1000" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Jul 20 01:44:38 2011 -0400" }, "message": "superblock: move pin_sb_for_writeback() to fs/super.c\n\nThe per-sb shrinker has the same requirement as the writeback\nthreads of ensuring that the superblock is usable and pinned for the\ntime it takes to run the work. Both need to take a passive reference\nto the sb, take a read lock on the s_umount lock and then only\ncontinue if an unmount is not in progress.\n\npin_sb_for_writeback() does this exactly, so move it to fs/super.c\nand rename it to grab_super_passive() and exporting it via\nfs/internal.h for all the VFS code to be able to use.\n\nSigned-off-by: Dave Chinner \u003cdchinner@redhat.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "09cc9fc7a7c3d872065426d7fb0f0ad6d3eb90fc", "tree": "79f6f835dd009ac34bd35ee3ee61e616ec2b255a", "parents": [ "98b745c647a5a90c3c21ea43cbfad9a47b0dfad7" ], "author": { "name": "Dave Chinner", "email": "dchinner@redhat.com", "time": "Fri Jul 08 14:14:40 2011 +1000" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Jul 20 01:44:36 2011 -0400" }, "message": "inode: move to per-sb LRU locks\n\nWith the inode LRUs moving to per-sb structures, there is no longer\na need for a global inode_lru_lock. The locking can be made more\nfine-grained by moving to a per-sb LRU lock, isolating the LRU\noperations of different filesytsems completely from each other.\n\nSigned-off-by: Dave Chinner \u003cdchinner@redhat.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "98b745c647a5a90c3c21ea43cbfad9a47b0dfad7", "tree": "08917a620b6d15076223c1ef75996a1a76a13abd", "parents": [ "fcb94f72d3e0f4f34b326c2986da8e5996daf72c" ], "author": { "name": "Dave Chinner", "email": "dchinner@redhat.com", "time": "Fri Jul 08 14:14:39 2011 +1000" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Jul 20 01:44:35 2011 -0400" }, "message": "inode: Make unused inode LRU per superblock\n\nThe inode unused list is currently a global LRU. This does not match\nthe other global filesystem cache - the dentry cache - which uses\nper-superblock LRU lists. Hence we have related filesystem object\ntypes using different LRU reclaimation schemes.\n\nTo enable a per-superblock filesystem cache shrinker, both of these\ncaches need to have per-sb unused object LRU lists. Hence this patch\nconverts the global inode LRU to per-sb LRUs.\n\nThe patch only does rudimentary per-sb propotioning in the shrinker\ninfrastructure, as this gets removed when the per-sb shrinker\ncallouts are introduced later on.\n\nSigned-off-by: Dave Chinner \u003cdchinner@redhat.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "0ee5dc676a5f8fadede608c7281dfedb1ae714ea", "tree": "887896f0e1b51f39e9be21a1e8d960ec50a817a7", "parents": [ "fb408e6ccc32404a05783911b6f3fed56bd17b06" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Jul 07 15:44:25 2011 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Jul 20 01:44:20 2011 -0400" }, "message": "btrfs: kill magical embedded struct superblock\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "43e15cdbefea4ce6d68113de98d4f61c0cf45687", "tree": "75676aae179fc56bbb9d861c0ab656a9edaa7ca4", "parents": [ "44396f4b5cb8566f7118aec55eeac99be7ad94cb" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Jun 03 20:16:57 2011 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Jul 20 01:43:04 2011 -0400" }, "message": "new helper: iterate_supers_type()\n\nCall the given function for all superblocks of given type. Function\ngets a superblock (with s_umount locked shared) and (void *) argument\nsupplied by caller of iterator.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "4aede84b33d6beb401136a3deca0651ae07c5e99", "tree": "831266dbb15227584da5011ae4bb1e5038a69677", "parents": [ "a07405b7802691d29ab3b23bdc76ee6d006aad0b" ], "author": { "name": "Justin TerAvest", "email": "teravest@google.com", "time": "Tue Jul 12 08:31:45 2011 +0200" }, "committer": { "name": "Jens Axboe", "email": "jaxboe@fusionio.com", "time": "Tue Jul 12 08:35:10 2011 +0200" }, "message": "fixlet: Remove fs_excl from struct task.\n\nfs_excl is a poor man\u0027s priority inheritance for filesystems to hint to\nthe block layer that an operation is important. It was never clearly\nspecified, not widely adopted, and will not prevent starvation in many\ncases (like across cgroups).\n\nfs_excl was introduced with the time sliced CFQ IO scheduler, to\nindicate when a process held FS exclusive resources and thus needed\na boost.\n\nIt doesn\u0027t cover all file systems, and it was never fully complete.\nLets kill it.\n\nSigned-off-by: Justin TerAvest \u003cteravest@google.com\u003e\nSigned-off-by: Jens Axboe \u003cjaxboe@fusionio.com\u003e\n" }, { "commit": "9e1f1de02c2275d7172e18dc4e7c2065777611bf", "tree": "15e9d202e64275cdbff6ed1d54804da5966d7d8d", "parents": [ "1fa7b6a29c61358cc2ca6f64cef4aa0e1a7ca74c" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Jun 03 18:24:58 2011 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Jun 03 18:24:58 2011 -0400" }, "message": "more conservative S_NOSEC handling\n\nCaching \"we have already removed suid/caps\" was overenthusiastic as merged.\nOn network filesystems we might have had suid/caps set on another client,\nsilently picked by this client on revalidate, all of that *without* clearing\nthe S_NOSEC flag.\n\nAFAICS, the only reasonably sane way to deal with that is\n\t* new superblock flag; unless set, S_NOSEC is not going to be set.\n\t* local block filesystems set it in their -\u003emount() (more accurately,\nmount_bdev() does, so does btrfs -\u003emount(), users of mount_bdev() other than\nlocal block ones clear it)\n\t* if any network filesystem (or a cluster one) wants to use S_NOSEC,\nit\u0027ll need to set MS_NOSEC in sb-\u003es_flags *AND* take care to clear S_NOSEC when\ninode attribute changes are picked from other clients.\n\nIt\u0027s not an earth-shattering hole (anybody that can set suid on another client\nwill almost certainly be able to write to the file before doing that anyway),\nbut it\u0027s a bug that needs fixing.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "f8d613e2a665bf1be9628a3c3f9bafe7599b32c0", "tree": "98d4da8d0e1a5fb1d9064626b4b96d95ccf26375", "parents": [ "8a0599dd2471f2a2e409498c08a0ab339057ad06", "5bc20fc59706214d9591c11e1938a629d3538c12" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 26 10:50:56 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu May 26 10:50:56 2011 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/djm/tmem\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/djm/tmem:\n xen: cleancache shim to Xen Transcendent Memory\n ocfs2: add cleancache support\n ext4: add cleancache support\n btrfs: add cleancache support\n ext3: add cleancache support\n mm/fs: add hooks to support cleancache\n mm: cleancache core ops functions and config\n fs: add field to superblock to support cleancache\n mm/fs: cleancache documentation\n\nFix up trivial conflict in fs/btrfs/extent_io.c due to includes\n" }, { "commit": "c515e1fd361c2a08a9c2eb139396ec30a4f477dc", "tree": "cb1a27f27f065400fc79dc287594843e169d74ab", "parents": [ "077b1f83a69d94f2918630a882d74939baca0bce" ], "author": { "name": "Dan Magenheimer", "email": "dan.magenheimer@oracle.com", "time": "Thu May 26 10:01:43 2011 -0600" }, "committer": { "name": "Dan Magenheimer", "email": "dan.magenheimer@oracle.com", "time": "Thu May 26 10:01:43 2011 -0600" }, "message": "mm/fs: add hooks to support cleancache\n\nThis fourth patch of eight in this cleancache series provides the\ncore hooks in VFS for: initializing cleancache per filesystem;\ncapturing clean pages reclaimed by page cache; attempting to get\npages from cleancache before filesystem read; and ensuring coherency\nbetween pagecache, disk, and cleancache. Note that the placement\nof these hooks was stable from 2.6.18 to 2.6.38; a minor semantic\nchange was required due to a patchset in 2.6.39.\n\nAll hooks become no-ops if CONFIG_CLEANCACHE is unset, or become\na check of a boolean global if CONFIG_CLEANCACHE is set but no\ncleancache \"backend\" has claimed cleancache_ops.\n\nDetails and a FAQ can be found in Documentation/vm/cleancache.txt\n\n[v8: minchan.kim@gmail.com: adapt to new remove_from_page_cache function]\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\nSigned-off-by: Dan Magenheimer \u003cdan.magenheimer@oracle.com\u003e\nReviewed-by: Jeremy Fitzhardinge \u003cjeremy@goop.org\u003e\nReviewed-by: Konrad Rzeszutek Wilk \u003ckonrad.wilk@oracle.com\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Al Viro \u003cviro@ZenIV.linux.org.uk\u003e\nCc: Matthew Wilcox \u003cmatthew@wil.cx\u003e\nCc: Nick Piggin \u003cnpiggin@kernel.dk\u003e\nCc: Mel Gorman \u003cmel@csn.ul.ie\u003e\nCc: Rik Van Riel \u003criel@redhat.com\u003e\nCc: Jan Beulich \u003cJBeulich@novell.com\u003e\nCc: Andreas Dilger \u003cadilger@sun.com\u003e\nCc: Ted Ts\u0027o \u003ctytso@mit.edu\u003e\nCc: Mark Fasheh \u003cmfasheh@suse.com\u003e\nCc: Joel Becker \u003cjoel.becker@oracle.com\u003e\nCc: Nitin Gupta \u003cngupta@vflare.org\u003e\n" }, { "commit": "4358b5678b27ffe81391d84ce150df8e81010f6a", "tree": "7cda0cb7e86e0ecf5a4497c7bb3724a8a2ee6bfd", "parents": [ "b73b9a4ba753dfd7d304ee6ee4685b827524c533" ], "author": { "name": "Jeff Layton", "email": "jlayton@redhat.com", "time": "Tue Mar 29 09:33:31 2011 -0400" }, "committer": { "name": "Steve French", "email": "sfrench@us.ibm.com", "time": "Thu May 19 14:10:49 2011 +0000" }, "message": "VFS: trivial: fix comment on s_maxbytes value warning check\n\nI originally intended to remove this warning in 2.6.34, but it\u0027s not in\na high performance codepath and might help us to catch bugs later. Let\u0027s\nkeep it, but fix the comment to allay confusion about its removal.\n\nSigned-off-by: Jeff Layton \u003cjlayton@redhat.com\u003e\nSigned-off-by: Steve French \u003csfrench@us.ibm.com\u003e\n" }, { "commit": "6c5103890057b1bb781b26b7aae38d33e4c517d8", "tree": "e6e57961dcddcb5841acb34956e70b9dc696a880", "parents": [ "3dab04e6978e358ad2307bca563fabd6c5d2c58b", "9d2e157d970a73b3f270b631828e03eb452d525e" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 24 10:16:26 2011 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 24 10:16:26 2011 -0700" }, "message": "Merge branch \u0027for-2.6.39/core\u0027 of git://git.kernel.dk/linux-2.6-block\n\n* \u0027for-2.6.39/core\u0027 of git://git.kernel.dk/linux-2.6-block: (65 commits)\n Documentation/iostats.txt: bit-size reference etc.\n cfq-iosched: removing unnecessary think time checking\n cfq-iosched: Don\u0027t clear queue stats when preempt.\n blk-throttle: Reset group slice when limits are changed\n blk-cgroup: Only give unaccounted_time under debug\n cfq-iosched: Don\u0027t set active queue in preempt\n block: fix non-atomic access to genhd inflight structures\n block: attempt to merge with existing requests on plug flush\n block: NULL dereference on error path in __blkdev_get()\n cfq-iosched: Don\u0027t update group weights when on service tree\n fs: assign sb-\u003es_bdi to default_backing_dev_info if the bdi is going away\n block: Require subsystems to explicitly allocate bio_set integrity mempool\n jbd2: finish conversion from WRITE_SYNC_PLUG to WRITE_SYNC and explicit plugging\n jbd: finish conversion from WRITE_SYNC_PLUG to WRITE_SYNC and explicit plugging\n fs: make fsync_buffers_list() plug\n mm: make generic_writepages() use plugging\n blk-cgroup: Add unaccounted time to timeslice_used.\n block: fixup plugging stubs for !CONFIG_BLOCK\n block: remove obsolete comments for blkdev_issue_zeroout.\n blktrace: Use rq-\u003ecmd_flags directly in blk_add_trace_rq.\n ...\n\nFix up conflicts in fs/{aio.c,super.c}\n" }, { "commit": "9d412a43c3b26e1e549319e5eec26f0829f9f74d", "tree": "b6522b693564fed172e9f8aee2e42aa2fdd95c8a", "parents": [ "fbe0aa1f3d16fac5b641c0c1697371dcbe45b569" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Mar 17 22:08:28 2011 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Mar 17 22:10:41 2011 -0400" }, "message": "vfs: split off vfsmount-related parts of vfs_kern_mount()\n\nnew function: mount_fs(). Does all work done by vfs_kern_mount()\nexcept the allocation and filling of vfsmount; returns root dentry\nor ERR_PTR().\n\nvfs_kern_mount() switched to using it and taken to fs/namespace.c,\nalong with its wrappers.\n\nalloc_vfsmnt()/free_vfsmnt() made static.\n\nfunctions in namespace.c slightly reordered.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "95f28604a65b1c40b6c6cd95e58439cd7ded3add", "tree": "25b3be2d5505f06b2262bade8d1ecf5323c47ff8", "parents": [ "a91a2785b200864aef2270ed6a3babac7a253a20" ], "author": { "name": "Jens Axboe", "email": "jaxboe@fusionio.com", "time": "Thu Mar 17 11:13:12 2011 +0100" }, "committer": { "name": "Jens Axboe", "email": "jaxboe@fusionio.com", "time": "Thu Mar 17 11:13:12 2011 +0100" }, "message": "fs: assign sb-\u003es_bdi to default_backing_dev_info if the bdi is going away\n\nWe don\u0027t have proper reference counting for this yet, so we run into\ncases where the device is pulled and we OOPS on flushing the fs data.\nThis happens even though the dirty inodes have already been\nmigrated to the default_backing_dev_info.\n\nReported-by: Torsten Hilbrich \u003ctorsten.hilbrich@secunet.com\u003e\nTested-by: Torsten Hilbrich \u003ctorsten.hilbrich@secunet.com\u003e\nCc: stable@kernel.org\nSigned-off-by: Jens Axboe \u003cjaxboe@fusionio.com\u003e\n" }, { "commit": "1a102ff92579edeff5e3d5d3c76ca49977898f00", "tree": "5585d724c8a996b770bb7a621563a7535a8c0496", "parents": [ "011949811b946bd3b72fca71200f197c6168a5f8" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Mar 16 09:07:58 2011 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Mar 16 16:48:06 2011 -0400" }, "message": "vfs: bury -\u003eget_sb()\n\nThis is an ex-parrot.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "d863b50ab01333659314c2034890cb76d9fdc3c7", "tree": "88d27ed4717bb49ba696f2efb5ef024388412af3", "parents": [ "2dab597441667d6c04451a7dcf215241ad4c74f6" ], "author": { "name": "Boaz Harrosh", "email": "bharrosh@panasas.com", "time": "Thu Feb 10 15:01:20 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Feb 11 16:12:19 2011 -0800" }, "message": "vfs: call rcu_barrier after -\u003ekill_sb()\n\nIn commit fa0d7e3de6d6 (\"fs: icache RCU free inodes\"), we use rcu free\ninode instead of freeing the inode directly. It causes a crash when we\nrmmod immediately after we umount the volume[1].\n\nSo we need to call rcu_barrier after we kill_sb so that the inode is\nfreed before we do rmmod. The idea is inspired by Aneesh Kumar.\nrcu_barrier will wait for all callbacks to end before preceding. The\noriginal patch was done by Tao Ma, but synchronize_rcu() is not enough\nhere.\n\n1. http://marc.info/?l\u003dlinux-fsdevel\u0026m\u003d129680863330185\u0026w\u003d2\n\nTested-by: Tao Ma \u003cboyu.mt@taobao.com\u003e\nSigned-off-by: Boaz Harrosh \u003cbharrosh@panasas.com\u003e\nCc: Nick Piggin \u003cnpiggin@kernel.dk\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Chris Mason \u003cchris.mason@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": "f03c65993b98eeb909a4012ce7833c5857d74755", "tree": "a6dd5e353889b7fe4ab87c54170d09443d788fec", "parents": [ "7b8a53fd815deb39542085897743fa0063f9fe06" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Jan 14 22:30:21 2011 -0500" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Sun Jan 16 13:47:07 2011 -0500" }, "message": "sanitize vfsmount refcounting changes\n\nInstead of splitting refcount between (per-cpu) mnt_count\nand (SMP-only) mnt_longrefs, make all references contribute\nto mnt_count again and keep track of how many are longterm\nones.\n\nAccounting rules for longterm count:\n\t* 1 for each fs_struct.root.mnt\n\t* 1 for each fs_struct.pwd.mnt\n\t* 1 for having non-NULL -\u003emnt_ns\n\t* decrement to 0 happens only under vfsmount lock exclusive\n\nThat allows nice common case for mntput() - since we can\u0027t drop the\nfinal reference until after mnt_longterm has reached 0 due to the rules\nabove, mntput() can grab vfsmount lock shared and check mnt_longterm.\nIf it turns out to be non-zero (which is the common case), we know\nthat this is not the final mntput() and can just blindly decrement\npercpu mnt_count. Otherwise we grab vfsmount lock exclusive and\ndo usual decrement-and-check of percpu mnt_count.\n\nFor fs_struct.c we have mnt_make_longterm() and mnt_make_shortterm();\nnamespace.c uses the latter in places where we don\u0027t already hold\nvfsmount lock exclusive and opencodes a few remaining spots where\nwe need to manipulate mnt_longterm.\n\nNote that we mostly revert the code outside of fs/namespace.c back\nto what we used to have; in particular, normal code doesn\u0027t need\nto care about two kinds of references, etc. And we get to keep\nthe optimization Nick\u0027s variant had bought us...\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "275220f0fcff1adf28a717076e00f575edf05fda", "tree": "d249bccc80c64443dab211639050c4fb14332648", "parents": [ "fe3c560b8a22cb28e54fe8950abef38e88d75831", "81c5e2ae33c4b19e53966b427e33646bf6811830" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 10:45:01 2011 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 13 10:45:01 2011 -0800" }, "message": "Merge branch \u0027for-2.6.38/core\u0027 of git://git.kernel.dk/linux-2.6-block\n\n* \u0027for-2.6.38/core\u0027 of git://git.kernel.dk/linux-2.6-block: (43 commits)\n block: ensure that completion error gets properly traced\n blktrace: add missing probe argument to block_bio_complete\n block cfq: don\u0027t use atomic_t for cfq_group\n block cfq: don\u0027t use atomic_t for cfq_queue\n block: trace event block fix unassigned field\n block: add internal hd part table references\n block: fix accounting bug on cross partition merges\n kref: add kref_test_and_get\n bio-integrity: mark kintegrityd_wq highpri and CPU intensive\n block: make kblockd_workqueue smarter\n Revert \"sd: implement sd_check_events()\"\n block: Clean up exit_io_context() source code.\n Fix compile warnings due to missing removal of a \u0027ret\u0027 variable\n fs/block: type signature of major_to_index(int) to major_to_index(unsigned)\n block: convert !IS_ERR(p) \u0026\u0026 p to !IS_ERR_NOR_NULL(p)\n cfq-iosched: don\u0027t check cfqg in choose_service_tree()\n fs/splice: Pull buf-\u003eops-\u003econfirm() from splice_from_pipe actors\n cdrom: export cdrom_check_events()\n sd: implement sd_check_events()\n sr: implement sr_check_events()\n ...\n" }, { "commit": "b3e19d924b6eaf2ca7d22cba99a517c5171007b6", "tree": "8c1fa4074114a883a4e2de2f7d12eb29ed91bdf1", "parents": [ "c6653a838b1b2738561aff0b8c0f62a9b714bdd9" ], "author": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:50:11 2011 +1100" }, "committer": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:50:33 2011 +1100" }, "message": "fs: scale mntget/mntput\n\nThe problem that this patch aims to fix is vfsmount refcounting scalability.\nWe need to take a reference on the vfsmount for every successful path lookup,\nwhich often go to the same mount point.\n\nThe fundamental difficulty is that a \"simple\" reference count can never be made\nscalable, because any time a reference is dropped, we must check whether that\nwas the last reference. To do that requires communication with all other CPUs\nthat may have taken a reference count.\n\nWe can make refcounts more scalable in a couple of ways, involving keeping\ndistributed counters, and checking for the global-zero condition less\nfrequently.\n\n- check the global sum once every interval (this will delay zero detection\n for some interval, so it\u0027s probably a showstopper for vfsmounts).\n\n- keep a local count and only taking the global sum when local reaches 0 (this\n is difficult for vfsmounts, because we can\u0027t hold preempt off for the life of\n a reference, so a counter would need to be per-thread or tied strongly to a\n particular CPU which requires more locking).\n\n- keep a local difference of increments and decrements, which allows us to sum\n the total difference and hence find the refcount when summing all CPUs. Then,\n keep a single integer \"long\" refcount for slow and long lasting references,\n and only take the global sum of local counters when the long refcount is 0.\n\nThis last scheme is what I implemented here. Attached mounts and process root\nand working directory references are \"long\" references, and everything else is\na short reference.\n\nThis allows scalable vfsmount references during path walking over mounted\nsubtrees and unattached (lazy umounted) mounts with processes still running\nin them.\n\nThis results in one fewer atomic op in the fastpath: mntget is now just a\nper-CPU inc, rather than an atomic inc; and mntput just requires a spinlock\nand non-atomic decrement in the common case. However code is otherwise bigger\nand heavier, so single threaded performance is basically a wash.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@kernel.dk\u003e\n" }, { "commit": "ceb5bdc2d246f6d81cf61ed70f325308a11821d2", "tree": "65fc9e0227994d4ffc80530dd15bb5a9672a295e", "parents": [ "626d607435617cc0f033522083e2bb195b81813c" ], "author": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:50:05 2011 +1100" }, "committer": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Fri Jan 07 17:50:31 2011 +1100" }, "message": "fs: dcache per-bucket dcache hash locking\n\nWe can turn the dcache hash locking from a global dcache_hash_lock into\nper-bucket locking.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@kernel.dk\u003e\n" }, { "commit": "d4d77629953eabd3c14f6fa5746f6b28babfc55f", "tree": "38cce0d4764ecb34a9f7f49332959780e28bb786", "parents": [ "75f1dc0d076d1c1168f2115f1941ea627d38bd5a" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Sat Nov 13 11:55:18 2010 +0100" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Sat Nov 13 11:55:18 2010 +0100" }, "message": "block: clean up blkdev_get() wrappers and their users\n\nAfter recent blkdev_get() modifications, open_by_devnum() and\nopen_bdev_exclusive() are simple wrappers around blkdev_get().\nReplace them with blkdev_get_by_dev() and blkdev_get_by_path().\n\nblkdev_get_by_dev() is identical to open_by_devnum().\nblkdev_get_by_path() is slightly different in that it doesn\u0027t\nautomatically add %FMODE_EXCL to @mode.\n\nAll users are converted. Most conversions are mechanical and don\u0027t\nintroduce any behavior difference. There are several exceptions.\n\n* btrfs now sets FMODE_EXCL in btrfs_device-\u003emode, so there\u0027s no\n reason to OR it explicitly on blkdev_put().\n\n* gfs2, nilfs2 and the generic mount_bdev() now set FMODE_EXCL in\n sb-\u003es_mode.\n\n* With the above changes, sb-\u003es_mode now always should contain\n FMODE_EXCL. WARN_ON_ONCE() added to kill_block_super() to detect\n errors.\n\nThe new blkdev_get_*() functions are with proper docbook comments.\nWhile at it, add function description to blkdev_get() too.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nCc: Philipp Reisner \u003cphilipp.reisner@linbit.com\u003e\nCc: Neil Brown \u003cneilb@suse.de\u003e\nCc: Mike Snitzer \u003csnitzer@redhat.com\u003e\nCc: Joern Engel \u003cjoern@lazybastard.org\u003e\nCc: Chris Mason \u003cchris.mason@oracle.com\u003e\nCc: Jan Kara \u003cjack@suse.cz\u003e\nCc: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\nCc: KONISHI Ryusuke \u003ckonishi.ryusuke@lab.ntt.co.jp\u003e\nCc: reiserfs-devel@vger.kernel.org\nCc: xfs-masters@oss.sgi.com\nCc: Alexander Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "e525fd89d380c4a94c0d63913a1dd1a593ed25e7", "tree": "d226ef40d3f99e42fcf272ad432585cbd641ebec", "parents": [ "e09b457bdb7e8d23fc54dcef0930ac697d8de895" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Sat Nov 13 11:55:17 2010 +0100" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Sat Nov 13 11:55:17 2010 +0100" }, "message": "block: make blkdev_get/put() handle exclusive access\n\nOver time, block layer has accumulated a set of APIs dealing with bdev\nopen, close, claim and release.\n\n* blkdev_get/put() are the primary open and close functions.\n\n* bd_claim/release() deal with exclusive open.\n\n* open/close_bdev_exclusive() are combination of open and claim and\n the other way around, respectively.\n\n* bd_link/unlink_disk_holder() to create and remove holder/slave\n symlinks.\n\n* open_by_devnum() wraps bdget() + blkdev_get().\n\nThe interface is a bit confusing and the decoupling of open and claim\nmakes it impossible to properly guarantee exclusive access as\nin-kernel open + claim sequence can disturb the existing exclusive\nopen even before the block layer knows the current open if for another\nexclusive access. Reorganize the interface such that,\n\n* blkdev_get() is extended to include exclusive access management.\n @holder argument is added and, if is @FMODE_EXCL specified, it will\n gain exclusive access atomically w.r.t. other exclusive accesses.\n\n* blkdev_put() is similarly extended. It now takes @mode argument and\n if @FMODE_EXCL is set, it releases an exclusive access. Also, when\n the last exclusive claim is released, the holder/slave symlinks are\n removed automatically.\n\n* bd_claim/release() and close_bdev_exclusive() are no longer\n necessary and either made static or removed.\n\n* bd_link_disk_holder() remains the same but bd_unlink_disk_holder()\n is no longer necessary and removed.\n\n* open_bdev_exclusive() becomes a simple wrapper around lookup_bdev()\n and blkdev_get(). It also has an unexpected extra bdev_read_only()\n test which probably should be moved into blkdev_get().\n\n* open_by_devnum() is modified to take @holder argument and pass it to\n blkdev_get().\n\nMost of bdev open/close operations are unified into blkdev_get/put()\nand most exclusive accesses are tested atomically at the open time (as\nit should). This cleans up code and removes some, both valid and\ninvalid, but unnecessary all the same, corner cases.\n\nopen_bdev_exclusive() and open_by_devnum() can use further cleanup -\nrename to blkdev_get_by_path() and blkdev_get_by_devt() and drop\nspecial features. Well, let\u0027s leave them for another day.\n\nMost conversions are straight-forward. drbd conversion is a bit more\ninvolved as there was some reordering, but the logic should stay the\nsame.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nAcked-by: Neil Brown \u003cneilb@suse.de\u003e\nAcked-by: Ryusuke Konishi \u003ckonishi.ryusuke@lab.ntt.co.jp\u003e\nAcked-by: Mike Snitzer \u003csnitzer@redhat.com\u003e\nAcked-by: Philipp Reisner \u003cphilipp.reisner@linbit.com\u003e\nCc: Peter Osterlund \u003cpetero2@telia.com\u003e\nCc: Martin Schwidefsky \u003cschwidefsky@de.ibm.com\u003e\nCc: Heiko Carstens \u003cheiko.carstens@de.ibm.com\u003e\nCc: Jan Kara \u003cjack@suse.cz\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nCc: Andreas Dilger \u003cadilger.kernel@dilger.ca\u003e\nCc: \"Theodore Ts\u0027o\" \u003ctytso@mit.edu\u003e\nCc: Mark Fasheh \u003cmfasheh@suse.com\u003e\nCc: Joel Becker \u003cjoel.becker@oracle.com\u003e\nCc: Alex Elder \u003caelder@sgi.com\u003e\nCc: Christoph Hellwig \u003chch@infradead.org\u003e\nCc: dm-devel@redhat.com\nCc: drbd-dev@lists.linbit.com\nCc: Leo Chen \u003cleochen@broadcom.com\u003e\nCc: Scott Branden \u003csbranden@broadcom.com\u003e\nCc: Chris Mason \u003cchris.mason@oracle.com\u003e\nCc: Steven Whitehouse \u003cswhiteho@redhat.com\u003e\nCc: Dave Kleikamp \u003cshaggy@linux.vnet.ibm.com\u003e\nCc: Joern Engel \u003cjoern@logfs.org\u003e\nCc: reiserfs-devel@vger.kernel.org\nCc: Alexander Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "ceefda6931806972ecf550bd8231dce4a4178953", "tree": "46ed42a053f1ed43c3c110a21637a7b071657c8a", "parents": [ "aed1d84f98738bcc1c605e1ff442de9890441315" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Jul 26 13:16:50 2010 +0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Oct 29 04:17:03 2010 -0400" }, "message": "switch get_sb_ns() users\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "3c26ff6e499ee7e6f9f2bc7da5f2f30d80862ecf", "tree": "bd758d7f15f24aed225a64de77cc535785c50f96", "parents": [ "fc14f2fef682df677d64a145256dbd263df2aa7b" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Sun Jul 25 11:46:36 2010 +0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Oct 29 04:16:31 2010 -0400" }, "message": "convert get_sb_nodev() users\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "fc14f2fef682df677d64a145256dbd263df2aa7b", "tree": "74f6b939fbad959a43c04ec646cd0adc8af5f53a", "parents": [ "848b83a59b772b8f102bc5e3f1187c2fa5676959" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Sun Jul 25 01:48:30 2010 +0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Oct 29 04:16:28 2010 -0400" }, "message": "convert get_sb_single() users\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "152a08366671080f27b32e0c411ad620c5f88b57", "tree": "d13d16028f74839c678bce355ba8aac75d939fa8", "parents": [ "c96e41e92b4aaf11e1f9775ecf0d1c8cbff829ed" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Sun Jul 25 00:46:55 2010 +0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Oct 29 04:16:13 2010 -0400" }, "message": "new helper: mount_bdev()\n\n... and switch of the obvious get_sb_bdev() users to -\u003emount()\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "c96e41e92b4aaf11e1f9775ecf0d1c8cbff829ed", "tree": "5c24ad8aa541018a51e1704dccfc370116bb932f", "parents": [ "d893f1bc2a9f0f7dcb4b433452c59f9bedac0d7d" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Sun Jul 25 00:17:56 2010 +0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Oct 29 04:15:06 2010 -0400" }, "message": "beginning of transtion: -\u003emount()\n\neventual replacement for -\u003eget_sb() - does *not* get vfsmount,\nreturn ERR_PTR(error) or root of subtree to be mounted.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "63997e98a3be68d7cec806d22bf9b02b2e1daabb", "tree": "acd366273dc459d6b34e7f67216c06eb56117a4a", "parents": [ "9843b76aae80293f5b5a0e275360627508595ce5" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Oct 25 20:49:35 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Oct 25 21:27:18 2010 -0400" }, "message": "split invalidate_inodes()\n\nPull removal of fsnotify marks into generic_shutdown_super().\nSplit umount-time work into a new function - evict_inodes().\nMake sure that invalidate_inodes() will be able to cope with\nI_FREEING once we change locking in iput().\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "6416ccb7899960868f5016751fb81bf25213d24f", "tree": "457069571211e4ece844dc332a2f9673705a5bde", "parents": [ "2dc91abe03d8ce6dd7f9251faffafca5f6b9e85d" ], "author": { "name": "Nick Piggin", "email": "npiggin@kernel.dk", "time": "Wed Aug 18 04:37:38 2010 +1000" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Aug 18 08:35:48 2010 -0400" }, "message": "fs: scale files_lock\n\nfs: scale files_lock\n\nImprove scalability of files_lock by adding per-cpu, per-sb files lists,\nprotected with an lglock. The lglock provides fast access to the per-cpu lists\nto add and remove files. It also provides a snapshot of all the per-cpu lists\n(although this is very slow).\n\nOne difficulty with this approach is that a file can be removed from the list\nby another CPU. We must track which per-cpu list the file is on with a new\nvariale in the file struct (packed into a hole on 64-bit archs). Scalability\ncould suffer if files are frequently removed from different cpu\u0027s list.\n\nHowever loads with frequent removal of files imply short interval between\nadding and removing the files, and the scheduler attempts to avoid moving\nprocesses too far away. Also, even in the case of cross-CPU removal, the\nhardware has much more opportunity to parallelise cacheline transfers with N\ncachelines than with 1.\n\nA worst-case test of 1 CPU allocating files subsequently being freed by N CPUs\ndegenerates to contending on a single lock, which is no worse than before. When\nmore than one CPU are allocating files, even if they are always freed by\ndifferent CPUs, there will be more parallelism than the single-lock case.\n\nTesting results:\n\nOn a 2 socket, 8 core opteron, I measure the number of times the lock is taken\nto remove the file, the number of times it is removed by the same CPU that\nadded it, and the number of times it is removed by the same node that added it.\n\nBooting: locks\u003d 25049 cpu-hits\u003d 23174 (92.5%) node-hits\u003d 23945 (95.6%)\nkbuild -j16 locks\u003d2281913 cpu-hits\u003d2208126 (96.8%) node-hits\u003d2252674 (98.7%)\ndbench 64 locks\u003d4306582 cpu-hits\u003d4287247 (99.6%) node-hits\u003d4299527 (99.8%)\n\nSo a file is removed from the same CPU it was added by over 90% of the time.\nIt remains within the same node 95% of the time.\n\nTim Chen ran some numbers for a 64 thread Nehalem system performing a compile.\n\n throughput\n2.6.34-rc2 24.5\n+patch 24.9\n\n us sys idle IO wait (in %)\n2.6.34-rc2 51.25 28.25 17.25 3.25\n+patch 53.75 18.5 19 8.75\n\nSo significantly less CPU time spent in kernel code, higher idle time and\nslightly higher throughput.\n\nSingle threaded performance difference was within the noise of microbenchmarks.\nThat is not to say penalty does not exist, the code is larger and more memory\naccesses required so it will be slightly slower.\n\nCc: linux-kernel@vger.kernel.org\nCc: Tim Chen \u003ctim.c.chen@linux.intel.com\u003e\nCc: Andi Kleen \u003cak@linux.intel.com\u003e\nSigned-off-by: Nick Piggin \u003cnpiggin@kernel.dk\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "dca332528bc69e05f67161e1ed59929633d5e63d", "tree": "0ec5576d52bead57c73983d2412cfe71814b5f8d", "parents": [ "7a4dec53897ecd3367efb1e12fe8a4edc47dc0e9" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Sun Jul 25 02:31:46 2010 +0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Aug 09 16:49:02 2010 -0400" }, "message": "no need for list_for_each_entry_safe()/resetting with superblock list\n\njust delay __put_super() a bit\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "7a4dec53897ecd3367efb1e12fe8a4edc47dc0e9", "tree": "31d4639522e1453a7f5c38aa2436ffdd6df5c60b", "parents": [ "4f331f01b9c43bf001d3ffee578a97a1e0633eac" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Aug 09 12:05:43 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Aug 09 16:49:01 2010 -0400" }, "message": "Fix sget() race with failing mount\n\nIf sget() finds a matching superblock being set up, it\u0027ll\ngrab an active reference to it and grab s_umount. That\u0027s\nfine - we\u0027ll wait for completion of foofs_get_sb() that way.\nHowever, if said foofs_get_sb() fails we\u0027ll end up holding\nthe halfway-created superblock. deactivate_locked_super()\ncalled by foofs_get_sb() will just unlock the sucker since\nwe are holding another active reference to it.\n\nWhat we need is a way to tell if superblock has been successfully\nset up. Unfortunately, neither -\u003es_root nor the check for\nMS_ACTIVE quite fit. Cheap and easy way, suitable for backport:\nnew flag set by the (only) caller of -\u003eget_sb(). If that flag\nisn\u0027t present by the time sget() grabbed s_umount on preexisting\nsuperblock it has found, it\u0027s seeing a stillborn and should\njust bury it with deactivate_locked_super() (and repeat the search).\n\nLonger term we want to set that flag in -\u003eget_sb() instances (and\ncheck for it to distinguish between \"sget() found us a live sb\"\nand \"sget() has allocated an sb, we need to set it up\" in there,\ninstead of checking -\u003es_root as we do now).\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: stable@kernel.org\n" }, { "commit": "4f331f01b9c43bf001d3ffee578a97a1e0633eac", "tree": "77cd690ab7af2624e3fd7932563f6dc0f5d6441a", "parents": [ "719f2c879f4dda7d7f303bd387d37cd96db29d31" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Jul 20 15:18:07 2010 -0700" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Aug 09 16:48:59 2010 -0400" }, "message": "vfs: don\u0027t hold s_umount over close_bdev_exclusive() call\n\nFix an obscure AB-BA deadlock in get_sb_bdev().\n\nWhen a superblock is mounted more than once get_sb_bdev() calls\nclose_bdev_exclusive() to drop the extra bdev reference while holding\ns_umount. However, sb-\u003es_umount nests inside bd_mutex during\n__invalidate_device() and close_bdev_exclusive() acquires bd_mutex during\nblkdev_put(); thus creating an AB-BA deadlock.\n\nThis condition doesn\u0027t trigger frequently. For this condition to be\nvisible to lockdep, the filesystem must occupy the whole device (as\n__invalidate_device() only grabs bd_mutex for the whole device), the FS\nmust be mounted more than once and partition rescan should be issued while\nthe FS is still mounted.\n\nFix it by dropping s_umount over close_bdev_exclusive().\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nReported-by: Ciprian Docan \u003cdocan@eden.rutgers.edu\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nAcked-by: Jens Axboe \u003caxboe@kernel.dk\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "57439f878afafefad8836ebf5c49da2a0a746105", "tree": "ec11dd35704aa37d77a5fd8404fda57f297a3834", "parents": [ "5904b3b81d25166e5e39b9727645bb47937618e3" ], "author": { "name": "npiggin@suse.de", "email": "npiggin@suse.de", "time": "Thu Jun 24 13:02:14 2010 +1000" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jun 29 10:38:22 2010 -0700" }, "message": "fs: fix superblock iteration race\n\nlist_for_each_entry_safe is not suitable to protect against concurrent\nmodification of the list. 6754af6 introduced a race in sb walking.\n\nlist_for_each_entry can use the trick of pinning the current entry in\nthe list before we drop and retake the lock because it subsequently\nfollows cur-\u003enext. However list_for_each_entry_safe saves n\u003dcur-\u003enext\nfor following before entering the loop body, so when the lock is\ndropped, n may be deleted.\n\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Christoph Hellwig \u003chch@infradead.org\u003e\nCc: John Stultz \u003cjohnstul@us.ibm.com\u003e\nCc: Frank Mayhar \u003cfmayhar@google.com\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "d28619f1563140526e2f84eae436f39206f40a69", "tree": "d93284016a0983c8f27b745a3c50738617e50995", "parents": [ "021fad8b706849c091f6e682bc5df3ce4f9ab4d7", "f32764bd2bbb6ea003c158b1d276b4dc9f900348" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun May 30 09:11:11 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun May 30 09:11:11 2010 -0700" }, "message": "Merge branch \u0027for_linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6\n\n* \u0027for_linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6:\n quota: Convert quota statistics to generic percpu_counter\n ext3 uses rb_node \u003d NULL; to zero rb_root.\n quota: Fixup dquot_transfer\n reiserfs: Fix resuming of quotas on remount read-write\n pohmelfs: Remove dead quota code\n ufs: Remove dead quota code\n udf: Remove dead quota code\n quota: rename default quotactl methods to dquot_\n quota: explicitly set -\u003edq_op and -\u003es_qcop\n quota: drop remount argument to -\u003equota_on and -\u003equota_off\n quota: move unmount handling into the filesystem\n quota: kill the vfs_dq_off and vfs_dq_quota_on_remount wrappers\n quota: move remount handling into the filesystem\n ocfs2: Fix use after free on remount read-only\n\nFix up conflicts in fs/ext4/super.c and fs/ufs/file.c\n" }, { "commit": "7000d3c424e5bb350e502a477fb0e1ed42f8b10e", "tree": "1a0b27d94942969d2ff9e25cfd53f8f20992b6b4", "parents": [ "0ab7620a0cefe6982b914a830a41f65ecccd74bd" ], "author": { "name": "Randy Dunlap", "email": "randy.dunlap@oracle.com", "time": "Mon May 24 22:22:34 2010 -0700" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu May 27 22:06:23 2010 -0400" }, "message": "fs/super: fix kernel-doc warning\n\nFix fs/super.c kernel-doc warning and function notation:\nWarning(fs/super.c:957): No description found for parameter \u0027sb\u0027\n\nSigned-off-by: Randy Dunlap \u003crandy.dunlap@oracle.com\u003e\nCc: Alexander Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "123e9caf1e85008ab7eb5f6cd58c44f9a5d73b2b", "tree": "a7a49a9aabb2136e8d19a3d86096bb525a16e0b9", "parents": [ "307ae18a56e5b706056a2050d52e8cc01b5171c0" ], "author": { "name": "Christoph Hellwig", "email": "hch@infradead.org", "time": "Wed May 19 07:16:44 2010 -0400" }, "committer": { "name": "Jan Kara", "email": "jack@suse.cz", "time": "Mon May 24 14:10:17 2010 +0200" }, "message": "quota: explicitly set -\u003edq_op and -\u003es_qcop\n\nOnly set the quota operation vectors if the filesystem actually supports\nquota instead of doing it for all filesystems in alloc_super().\n\n[Jan Kara: Export dquot_operations and vfs_quotactl_ops]\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Jan Kara \u003cjack@suse.cz\u003e\n" }, { "commit": "e0ccfd959cd8907bcb66cc2042e0f4fd7fcbff2b", "tree": "a62a84034243e75e07bb063526e10ea0b837062f", "parents": [ "0f0dd62fddcbd0f6830ed8ef3d3426ccc46b9250" ], "author": { "name": "Christoph Hellwig", "email": "hch@infradead.org", "time": "Wed May 19 07:16:42 2010 -0400" }, "committer": { "name": "Jan Kara", "email": "jack@suse.cz", "time": "Mon May 24 14:09:12 2010 +0200" }, "message": "quota: move unmount handling into the filesystem\n\nCurrently the VFS calls into the quotactl interface for unmounting\nfilesystems. This means filesystems with their own quota handling\ncan\u0027t easily distinguish between user-space originating quotaoff\nand an unount. Instead move the responsibily of the unmount handling\ninto the filesystem to be consistent with all other dquot handling.\n\nNote that we do call dquot_disable a lot later now, e.g. after\na sync_filesystem. But this is fine as the quota code does all its\nwrites via blockdev\u0027s mapping and that is synced even later.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Jan Kara \u003cjack@suse.cz\u003e\n" }, { "commit": "c79d967de3741ceb60c5bbbf1b6f97eab9a89838", "tree": "5494e7b504cffb0ddc6942d1542c2b4a472207ed", "parents": [ "eea7feb072f5914ecafa95b3d83be0c229244d90" ], "author": { "name": "Christoph Hellwig", "email": "hch@infradead.org", "time": "Wed May 19 07:16:40 2010 -0400" }, "committer": { "name": "Jan Kara", "email": "jack@suse.cz", "time": "Mon May 24 14:06:39 2010 +0200" }, "message": "quota: move remount handling into the filesystem\n\nCurrently do_remount_sb calls into the dquot code to tell it about going\nfrom rw to ro and ro to rw. Move this code into the filesystem to\nnot depend on the dquot code in the VFS - note ocfs2 already ignores\nthese calls and handles remount by itself. This gets rid of overloading\nthe quotactl calls and allows to unify the VFS and XFS codepaths in\nthat area later.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Jan Kara \u003cjack@suse.cz\u003e\n" }, { "commit": "51ee049e771c14a29aaee8ecd6cbbe14db088f3a", "tree": "594c6676eb50a59ce82625ee09fee73fd700a5ed", "parents": [ "cc9106247de92549e50abb0ba12d6b2fdbf0be55" ], "author": { "name": "Roland Dreier", "email": "rdreier@cisco.com", "time": "Tue Apr 27 14:23:57 2010 -0700" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:22 2010 -0400" }, "message": "vfs: add lockdep annotation to s_vfs_rename_key for ecryptfs\n\n \u003e \u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\u003d\n \u003e [ INFO: possible recursive locking detected ]\n \u003e 2.6.31-2-generic #14~rbd3\n \u003e ---------------------------------------------\n \u003e firefox-3.5/4162 is trying to acquire lock:\n \u003e (\u0026s-\u003es_vfs_rename_mutex){+.+.+.}, at: [\u003cffffffff81139d31\u003e] lock_rename+0x41/0xf0\n \u003e\n \u003e but task is already holding lock:\n \u003e (\u0026s-\u003es_vfs_rename_mutex){+.+.+.}, at: [\u003cffffffff81139d31\u003e] lock_rename+0x41/0xf0\n \u003e\n \u003e other info that might help us debug this:\n \u003e 3 locks held by firefox-3.5/4162:\n \u003e #0: (\u0026s-\u003es_vfs_rename_mutex){+.+.+.}, at: [\u003cffffffff81139d31\u003e] lock_rename+0x41/0xf0\n \u003e #1: (\u0026sb-\u003es_type-\u003ei_mutex_key#11/1){+.+.+.}, at: [\u003cffffffff81139d5a\u003e] lock_rename+0x6a/0xf0\n \u003e #2: (\u0026sb-\u003es_type-\u003ei_mutex_key#11/2){+.+.+.}, at: [\u003cffffffff81139d6f\u003e] lock_rename+0x7f/0xf0\n \u003e\n \u003e stack backtrace:\n \u003e Pid: 4162, comm: firefox-3.5 Tainted: G C 2.6.31-2-generic #14~rbd3\n \u003e Call Trace:\n \u003e [\u003cffffffff8108ae74\u003e] print_deadlock_bug+0xf4/0x100\n \u003e [\u003cffffffff8108ce26\u003e] validate_chain+0x4c6/0x750\n \u003e [\u003cffffffff8108d2e7\u003e] __lock_acquire+0x237/0x430\n \u003e [\u003cffffffff8108d585\u003e] lock_acquire+0xa5/0x150\n \u003e [\u003cffffffff81139d31\u003e] ? lock_rename+0x41/0xf0\n \u003e [\u003cffffffff815526ad\u003e] __mutex_lock_common+0x4d/0x3d0\n \u003e [\u003cffffffff81139d31\u003e] ? lock_rename+0x41/0xf0\n \u003e [\u003cffffffff81139d31\u003e] ? lock_rename+0x41/0xf0\n \u003e [\u003cffffffff8120eaf9\u003e] ? ecryptfs_rename+0x99/0x170\n \u003e [\u003cffffffff81552b36\u003e] mutex_lock_nested+0x46/0x60\n \u003e [\u003cffffffff81139d31\u003e] lock_rename+0x41/0xf0\n \u003e [\u003cffffffff8120eb2a\u003e] ecryptfs_rename+0xca/0x170\n \u003e [\u003cffffffff81139a9e\u003e] vfs_rename_dir+0x13e/0x160\n \u003e [\u003cffffffff8113ac7e\u003e] vfs_rename+0xee/0x290\n \u003e [\u003cffffffff8113c212\u003e] ? __lookup_hash+0x102/0x160\n \u003e [\u003cffffffff8113d512\u003e] sys_renameat+0x252/0x280\n \u003e [\u003cffffffff81133eb4\u003e] ? cp_new_stat+0xe4/0x100\n \u003e [\u003cffffffff8101316a\u003e] ? sysret_check+0x2e/0x69\n \u003e [\u003cffffffff8108c34d\u003e] ? trace_hardirqs_on_caller+0x14d/0x190\n \u003e [\u003cffffffff8113d55b\u003e] sys_rename+0x1b/0x20\n \u003e [\u003cffffffff81013132\u003e] system_call_fastpath+0x16/0x1b\n\nThe trace above is totally reproducible by doing a cross-directory\nrename on an ecryptfs directory.\n\nThe issue seems to be that sys_renameat() does lock_rename() then calls\ninto the filesystem; if the filesystem is ecryptfs, then\necryptfs_rename() again does lock_rename() on the lower filesystem, and\nlockdep can\u0027t tell that the two s_vfs_rename_mutexes are different. It\nseems an annotation like the following is sufficient to fix this (it\ndoes get rid of the lockdep trace in my simple tests); however I would\nlike to make sure I\u0027m not misunderstanding the locking, hence the CC\nlist...\n\nSigned-off-by: Roland Dreier \u003crdreier@cisco.com\u003e\nCc: Tyler Hicks \u003ctyhicks@linux.vnet.ibm.com\u003e\nCc: Dustin Kirkland \u003ckirkland@canonical.com\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "18e9e5104fcd9a973ffe3eed3816c87f2a1b6cd2", "tree": "635369c866fcb384223618c878e0b4c317790634", "parents": [ "e1e46bf1866317d4f86f66bf18d3f07317d9f9ee" ], "author": { "name": "Josef Bacik", "email": "josef@redhat.com", "time": "Tue Mar 23 10:34:56 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:18 2010 -0400" }, "message": "Introduce freeze_super and thaw_super for the fsfreeze ioctl\n\nCurrently the way we do freezing is by passing sb\u003es_bdev to freeze_bdev and then\nletting it do all the work. But freezing is more of an fs thing, and doesn\u0027t\nreally have much to do with the bdev at all, all the work gets done with the\nsuper. In btrfs we do not populate s_bdev, since we can have multiple bdev\u0027s\nfor one fs and setting s_bdev makes removing devices from a pool kind of tricky.\nThis means that freezing a btrfs filesystem fails, which causes us to corrupt\nwith things like tux-on-ice which use the fsfreeze mechanism. So instead of\npopulating sb-\u003es_bdev with a random bdev in our pool, I\u0027ve broken the actual fs\nfreezing stuff into freeze_super and thaw_super. These just take the\nsuper_block that we\u0027re freezing and does the appropriate work. It\u0027s basically\njust copy and pasted from freeze_bdev. I\u0027ve then converted freeze_bdev over to\nuse the new super helpers. I\u0027ve tested this with ext4 and btrfs and verified\neverything continues to work the same as before.\n\nThe only new gotcha is multiple calls to the fsfreeze ioctl will return EBUSY if\nthe fs is already frozen. I thought this was a better solution than adding a\nfreeze counter to the super_block, but if everybody hates this idea I\u0027m open to\nsuggestions. Thanks,\n\nSigned-off-by: Josef Bacik \u003cjosef@redhat.com\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "e1e46bf1866317d4f86f66bf18d3f07317d9f9ee", "tree": "cbaf0c3d64beff26bb9e37f1640811492fb3c617", "parents": [ "d3f2147307cce9eac56dd91d381709aa3f1615b3" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue Mar 23 13:56:07 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:17 2010 -0400" }, "message": "Trim includes in fs/super.c\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "d3f2147307cce9eac56dd91d381709aa3f1615b3", "tree": "c1512bc87bdd657d379c6cf67f9c84436ad8fb52", "parents": [ "7ed1ee6118ae77330cae2a6d5e9383532f7dfb48" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue Mar 23 11:11:05 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:17 2010 -0400" }, "message": "Move grabbing s_umount to callers of grab_super()\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "7ed1ee6118ae77330cae2a6d5e9383532f7dfb48", "tree": "5f91faf8ddb9b210f9f66b15bd5c82c04e9a54e9", "parents": [ "e8c26255992474a2161c63ce9d385827302e4530" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue Mar 23 10:37:36 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:17 2010 -0400" }, "message": "Take statfs variants to fs/statfs.c\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "01a05b337a5b647909e1d6670f57e7202318a5fb", "tree": "7877f08db14877d06346c8e1ef52aa17f2483e93", "parents": [ "35cf7ba0b46dc3582a01c3860b14bff122662aa3" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue Mar 23 06:06:58 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:16 2010 -0400" }, "message": "new helper: iterate_supers()\n\n... and switch the simple \"loop over superblocks and do something\"\nloops to it.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "35cf7ba0b46dc3582a01c3860b14bff122662aa3", "tree": "2b38e9333600f468f0c8371c657c02e3aa8ec43b", "parents": [ "79893c17b45dec0d3c25bc22d28d9f319b14f573" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Mar 22 21:13:53 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:16 2010 -0400" }, "message": "Bury __put_super_and_need_restart()\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "df40c01a9249873e4ad0625ae5d9fb831962b75c", "tree": "9d049e176ad6a329e040faa32d6ee5933d1cea58", "parents": [ "1494583de59dfad2e3a6788ce9817e658d32df22" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Mar 22 20:23:25 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:16 2010 -0400" }, "message": "In get_super() and user_get_super() restarts are unconditional\n\nIf superblock had been still alive, we would\u0027ve returned it...\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "1494583de59dfad2e3a6788ce9817e658d32df22", "tree": "6f0a0fe022af703aa18ecc5f65a616fe44b9f8ad", "parents": [ "e7fe0585ca8793e2d43c57e77d4ca79042806acf" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Mar 22 20:15:33 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:15 2010 -0400" }, "message": "fix get_active_super()/umount() race\n\nThis one needs restarts...\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "e7fe0585ca8793e2d43c57e77d4ca79042806acf", "tree": "a68234ce86f5ff221f3f6260374f3a6437d77ce3", "parents": [ "6754af64641e8224c281ee5714e012e3ed41f701" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Mar 22 20:11:53 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:15 2010 -0400" }, "message": "fix do_emergency_remount()/umount() races\n\nneed list_for_each_entry_safe() here. Original didn\u0027t even\nhave restart logics, so if you race with umount() it blew up.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "6754af64641e8224c281ee5714e012e3ed41f701", "tree": "248a8c01aae46f98505d8c196393fae629f9691a", "parents": [ "8edd64bd6089e21f47dcdebb14b598b713213ddc" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Mar 22 20:09:33 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:15 2010 -0400" }, "message": "Convert simple loops over superblocks to list_for_each_entry_safe\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "8edd64bd6089e21f47dcdebb14b598b713213ddc", "tree": "c356a358c7b823433728869ff430ad205c4b8a5d", "parents": [ "551de6f34dfeefbeeadb32909c387d393114ecc8" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Mar 22 19:56:42 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:15 2010 -0400" }, "message": "get rid of restarts in sync_filesystems()\n\nAt the same time we can kill s_need_restart and local mutex in there.\n__put_super() made public for a while; will be gone later.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "551de6f34dfeefbeeadb32909c387d393114ecc8", "tree": "822af803e7e75ed476b0a176639c162e0395910d", "parents": [ "1712ac8fda7d8bc4dc921f5777b7423aacad7263" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Mar 22 19:36:35 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:14 2010 -0400" }, "message": "Leave superblocks on s_list until the end\n\nWe used to remove from s_list and s_instances at the same\ntime. So let\u0027s *not* do the former and skip superblocks\nthat have empty s_instances in the loops over s_list.\n\nThe next step, of course, will be to get rid of rescan logics\nin those loops.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "1712ac8fda7d8bc4dc921f5777b7423aacad7263", "tree": "1493bc7166ace04d9ac2f4d5383eaab1d43e17c4", "parents": [ "b20bd1a5e78af267dc4b6e1ffed48d5d776302c5" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Mar 22 15:22:31 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:14 2010 -0400" }, "message": "Saner locking around deactivate_super()\n\nMake sure that s_umount is acquired *before* we drop the final\nactive reference; we still have the fast path (atomic_dec_unless)\nand we have gotten rid of the window between the moment when\ns_active hits zero and s_umount is acquired. Which simplifies\nthe living hell out of grab_super() and inotify pin_to_kill()\nstuff.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "b20bd1a5e78af267dc4b6e1ffed48d5d776302c5", "tree": "d50982ee42500712d9add489435d4455580b9cac", "parents": [ "389b8be6ef419397e4f176652927ebad6ebb4b77" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Mon Mar 22 08:53:19 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:14 2010 -0400" }, "message": "get rid of S_BIAS\n\nuse atomic_inc_not_zero(\u0026sb-\u003es_active) instead of playing games with\nchecking -\u003es_count \u003e S_BIAS\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "389b8be6ef419397e4f176652927ebad6ebb4b77", "tree": "941037c2296b94b30f4a883235f54930b6aa485e", "parents": [ "79d7e39ee1d4b423206f6cfd2cd2eed6253d95fe" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Sun Mar 21 22:34:11 2010 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:14 2010 -0400" }, "message": "get rid of open-coded grab_super() in get_active_super()\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "a135aa2cd76a1de1a84312e0bb3498a5da76782d", "tree": "2933d7ee275896cfa3b5173fda0fc7c91fb0a398", "parents": [ "13e3c5e5b9c67e59074d24e29f3ff794bb4dfef0" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Mon Feb 01 21:55:52 2010 +0100" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 21 18:31:12 2010 -0400" }, "message": "remove incorrect comment in do_emergency_remount\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "5477d0face8a3ba4e9a1e7283692fff9c92f8e5e", "tree": "59bdad300f2be01911f9120e349b22664f199387", "parents": [ "79dba2eaa771c3173957eccfd288e0e0d12e4d3f" ], "author": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Thu Apr 29 20:33:35 2010 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Thu Apr 29 20:33:35 2010 +0200" }, "message": "fs: fs/super.c needs to include backing-dev.h for !CONFIG_BLOCK\n\nWhen CONFIG_BLOCK is set, it ends up getting backing-dev.h included.\nBut for !CONFIG_BLOCK, it isn\u0027t so lucky. The proper thing to do is\ninclude \u003clinux/backing-dev.h\u003e directly from the file it\u0027s used from,\nso do that.\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "5129a469a91a91427334c40e29e64c6d0ab68caf", "tree": "141a17cbea94c7c9c038187cc7081e1c688eac55", "parents": [ "7e2455c1a123ceadbb35150a610d61e8443fd340" ], "author": { "name": "Jörn Engel", "email": "joern@logfs.org", "time": "Sun Apr 25 08:54:42 2010 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Sun Apr 25 08:54:42 2010 +0200" }, "message": "Catch filesystems lacking s_bdi\n\nnoop_backing_dev_info is used only as a flag to mark filesystems that\ndon\u0027t have any backing store, like tmpfs, procfs, spufs, etc.\n\nSigned-off-by: Joern Engel \u003cjoern@logfs.org\u003e\n\nChanged the BUG_ON() to a WARN_ON(). Note that adding dirty inodes\nto the noop_backing_dev_info is not legal and will not result in\nthem being flushed, but we already catch this condition in\n__mark_inode_dirty() when checking for a registered bdi.\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "8089352a13b785d4e0df63d87bd2b71c76bb9aee", "tree": "e84db2c2a5c2095091d2012c00078023b90a3490", "parents": [ "d498b25a4f877be535246c4e5b6ee5890781a477" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri Feb 05 09:30:46 2010 -0500" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Mar 03 14:08:00 2010 -0500" }, "message": "Mirror MS_KERNMOUNT in -\u003emnt_flags\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "d208bbdda991b8808d9c033ce4d31cb1bd87dcfc", "tree": "8589a1f440a261008addb1ed97b75208eb37a6f1", "parents": [ "ec4f860597af41c6b71f4de86d8e86f710bfab54" ], "author": { "name": "Nick Piggin", "email": "npiggin@suse.de", "time": "Mon Dec 21 16:28:53 2009 -0800" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Mar 03 13:00:20 2010 -0500" }, "message": "fs: improve remount,ro vs buffercache coherency\n\nInvalidate sb-\u003es_bdev on remount,ro.\n\nFixes a problem reported by Jorge Boncompte who is seeing corruption\ntrying to snapshot a minix filesystem image. Some filesystems modify\ntheir metadata via a path other than the bdev buffer cache (eg. they may\nuse a private linear mapping for their metadata, or implement directories\nin pagecache, etc). Also, file data modifications usually go to the bdev\nvia their own mappings.\n\nThese updates are not coherent with buffercache IO (eg. via /dev/bdev)\nand never have been. However there could be a reasonable expectation that\nafter a mount -oremount,ro operation then the buffercache should\nsubsequently be coherent with previous filesystem modifications.\n\nSo invalidate the bdev mappings on a remount,ro operation to provide a\ncoherency point.\n\nThe problem was exposed when we switched the old rd to brd because old rd\ndidn\u0027t really function like a normal block device and updates to rd via\nmappings other than the buffercache would still end up going into its\nbuffercache. But the same problem has always affected other \"normal\"\nblock devices, including loop.\n\n[akpm@linux-foundation.org: repair comment layout]\nReported-by: \"Jorge Boncompte [DTI2]\" \u003cjorge@dti2.net\u003e\nTested-by: \"Jorge Boncompte [DTI2]\" \u003cjorge@dti2.net\u003e\nSigned-off-by: Nick Piggin \u003cnpiggin@suse.de\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "9329d1beaeed1a94f030c784dcec5ff973f402c4", "tree": "cbb0bc9153f6fc98db6156779c0265f7859bbec3", "parents": [ "f1f76f865b5f66db5b5c7f2d19874f2bb9b43b8d" ], "author": { "name": "Kay Sievers", "email": "kay.sievers@vrfy.org", "time": "Fri Dec 18 21:18:15 2009 +0100" }, "committer": { "name": "Greg Kroah-Hartman", "email": "gregkh@suse.de", "time": "Wed Dec 23 11:23:43 2009 -0800" }, "message": "vfs: get_sb_single() - do not pass options twice\n\nFilesystem code usually destroys the option buffer while\nparsing it. This leads to errors when the same buffer is\npassed twice. In case we fill a new superblock do not call\nremount.\n\nThis is needed to quite a warning that the debugfs code\ncauses every boot.\n\nCc: Miklos Szeredi \u003cmiklos@szeredi.hu\u003e\nSigned-off-by: Kay Sievers \u003ckay.sievers@vrfy.org\u003e\nSigned-off-by: Greg Kroah-Hartman \u003cgregkh@suse.de\u003e\n\n" }, { "commit": "4504230a71566785a05d3e6b53fa1ee071b864eb", "tree": "e73070fcad99b800f0324992c392d44c6dddc97c", "parents": [ "4fadd7bb20a1e7c774ed88dc703d8fbcd00ff917" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Mon Aug 03 23:28:35 2009 +0200" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Sep 24 07:47:41 2009 -0400" }, "message": "freeze_bdev: grab active reference to frozen superblocks\n\nCurrently we held s_umount while a filesystem is frozen, despite that we\nmight return to userspace and unlock it from a different process. Instead\ngrab an active reference to keep the file system busy and add an explicit\ncheck for frozen filesystems in remount and reject the remount instead\nof blocking on s_umount.\n\nAdd a new get_active_super helper to super.c for use by freeze_bdev that\ngrabs an active reference to a superblock from a given block device.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "4fadd7bb20a1e7c774ed88dc703d8fbcd00ff917", "tree": "a6f3df6f19d27e81f35a93f8858b73bd4273f420", "parents": [ "1ba50bbe93ebb98e83b174a85eff76af430c4e5b" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Mon Aug 03 23:28:06 2009 +0200" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Sep 24 07:47:39 2009 -0400" }, "message": "freeze_bdev: kill bd_mount_sem\n\nNow that we have the freeze count there is not much reason for bd_mount_sem\nanymore. The actual freeze/thaw operations are serialized using the\nbd_fsfreeze_mutex, and the only other place we take bd_mount_sem is\nget_sb_bdev which tries to prevent mounting a filesystem while the block\ndevice is frozen. Instead of add a check for bd_fsfreeze_count and\nreturn -EBUSY if a filesystem is frozen. While that is a change in user\nvisible behaviour a failing mount is much better for this case rather\nthan having the mount process stuck uninterruptible for a long time.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "42cb56ae2ab67390da34906b27bedc3f2ff1393b", "tree": "db4a6a4871feeb153f924a80a79b7790e4e2c90e", "parents": [ "5aa98b706e83da4cde4172c890d6e815915536a0" ], "author": { "name": "Jeff Layton", "email": "jlayton@redhat.com", "time": "Fri Sep 18 13:05:53 2009 -0700" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Sep 24 07:47:33 2009 -0400" }, "message": "vfs: change sb-\u003es_maxbytes to a loff_t\n\nsb-\u003es_maxbytes is supposed to indicate the maximum size of a file that can\nexist on the filesystem. It\u0027s declared as an unsigned long long.\n\nEven if a filesystem has no inherent limit that prevents it from using\nevery bit in that unsigned long long, it\u0027s still problematic to set it to\nanything larger than MAX_LFS_FILESIZE. There are places in the kernel\nthat cast s_maxbytes to a signed value. If it\u0027s set too large then this\ncast makes it a negative number and generally breaks the comparison.\n\nChange s_maxbytes to be loff_t instead. That should help eliminate the\ntemptation to set it too large by making it a signed value.\n\nAlso, add a warning for couple of releases to help catch filesystems that\nset s_maxbytes too large. Eventually we can either convert this to a\nBUG() or just remove it and in the hope that no one will get it wrong now\nthat it\u0027s a signed value.\n\nSigned-off-by: Jeff Layton \u003cjlayton@redhat.com\u003e\nCc: Johannes Weiner \u003channes@cmpxchg.org\u003e\nCc: Christoph Hellwig \u003chch@lst.de\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Robert Love \u003crlove@google.com\u003e\nCc: Mandeep Singh Baines \u003cmsb@google.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "b87221de6a4934eda856475a0065688d12973a04", "tree": "6bcf0628e106c4833538f4c23d710fbbe3d7609a", "parents": [ "0d54b217a247f39605361f867fefbb9e099a5432" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Mon Sep 21 17:01:09 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:24 2009 -0700" }, "message": "const: mark remaining super_operations const\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": "32a88aa1b6dfb901cec64e1898cac78d0f25028a", "tree": "51aa6f56ccfca53f495d015645373317bdee3647", "parents": [ "c4a77a6c7dcff04a2abc7fe4b6b2ae605be41c5b" ], "author": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Wed Sep 16 15:02:33 2009 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Wed Sep 16 15:18:51 2009 +0200" }, "message": "fs: Assign bdi in super_block\n\nWe do this automatically in get_sb_bdev() from the set_bdev_super()\ncallback. Filesystems that have their own private backing_dev_info\nmust assign that in -\u003efill_super().\n\nNote that -\u003es_bdi assignment is required for proper writeback!\n\nAcked-by: Christoph Hellwig \u003chch@infradead.org\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "03ba3782e8dcc5b0e1efe440d33084f066e38cae", "tree": "e5a6513b411de16a46199530ec98ef9b7f1efc50", "parents": [ "66f3b8e2e103a0b93b945764d98e9ba46cb926dd" ], "author": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Wed Sep 09 09:08:54 2009 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Fri Sep 11 09:20:25 2009 +0200" }, "message": "writeback: switch to per-bdi threads for flushing data\n\nThis gets rid of pdflush for bdi writeout and kupdated style cleaning.\npdflush writeout suffers from lack of locality and also requires more\nthreads to handle the same workload, since it has to work in a\nnon-blocking fashion against each queue. This also introduces lumpy\nbehaviour and potential request starvation, since pdflush can be starved\nfor queue access if others are accessing it. A sample ffsb workload that\ndoes random writes to files is about 8% faster here on a simple SATA drive\nduring the benchmark phase. File layout also seems a LOT more smooth in\nvmstat:\n\n r b swpd free buff cache si so bi bo in cs us sy id wa\n 0 1 0 608848 2652 375372 0 0 0 71024 604 24 1 10 48 42\n 0 1 0 549644 2712 433736 0 0 0 60692 505 27 1 8 48 44\n 1 0 0 476928 2784 505192 0 0 4 29540 553 24 0 9 53 37\n 0 1 0 457972 2808 524008 0 0 0 54876 331 16 0 4 38 58\n 0 1 0 366128 2928 614284 0 0 4 92168 710 58 0 13 53 34\n 0 1 0 295092 3000 684140 0 0 0 62924 572 23 0 9 53 37\n 0 1 0 236592 3064 741704 0 0 4 58256 523 17 0 8 48 44\n 0 1 0 165608 3132 811464 0 0 0 57460 560 21 0 8 54 38\n 0 1 0 102952 3200 873164 0 0 4 74748 540 29 1 10 48 41\n 0 1 0 48604 3252 926472 0 0 0 53248 469 29 0 7 47 45\n\nwhere vanilla tends to fluctuate a lot in the creation phase:\n\n r b swpd free buff cache si so bi bo in cs us sy id wa\n 1 1 0 678716 5792 303380 0 0 0 74064 565 50 1 11 52 36\n 1 0 0 662488 5864 319396 0 0 4 352 302 329 0 2 47 51\n 0 1 0 599312 5924 381468 0 0 0 78164 516 55 0 9 51 40\n 0 1 0 519952 6008 459516 0 0 4 78156 622 56 1 11 52 37\n 1 1 0 436640 6092 541632 0 0 0 82244 622 54 0 11 48 41\n 0 1 0 436640 6092 541660 0 0 0 8 152 39 0 0 51 49\n 0 1 0 332224 6200 644252 0 0 4 102800 728 46 1 13 49 36\n 1 0 0 274492 6260 701056 0 0 4 12328 459 49 0 7 50 43\n 0 1 0 211220 6324 763356 0 0 0 106940 515 37 1 10 51 39\n 1 0 0 160412 6376 813468 0 0 0 8224 415 43 0 6 49 45\n 1 1 0 85980 6452 886556 0 0 4 113516 575 39 1 11 54 34\n 0 2 0 85968 6452 886620 0 0 0 1640 158 211 0 0 46 54\n\nA 10 disk test with btrfs performs 26% faster with per-bdi flushing. A\nSSD based writeback test on XFS performs over 20% better as well, with\nthe throughput being very stable around 1GB/sec, where pdflush only\nmanages 750MB/sec and fluctuates wildly while doing so. Random buffered\nwrites to many files behave a lot better as well, as does random mmap\u0027ed\nwrites.\n\nA separate thread is added to sync the super blocks. In the long term,\nadding sync_supers_bdi() functionality could get rid of this thread again.\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "66f3b8e2e103a0b93b945764d98e9ba46cb926dd", "tree": "442bf5664214f0a1448e4010b09868cc58fdd3d1", "parents": [ "d8a8559cd7a9ccac98d5f6f13297a2ff68a43627" ], "author": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Wed Sep 02 09:19:46 2009 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Fri Sep 11 09:20:25 2009 +0200" }, "message": "writeback: move dirty inodes from super_block to backing_dev_info\n\nThis is a first step at introducing per-bdi flusher threads. We should\nhave no change in behaviour, although sb_has_dirty_inodes() is now\nridiculously expensive, as there\u0027s no easy way to answer that question.\nNot a huge problem, since it\u0027ll be deleted in subsequent patches.\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "f21f62208a6f60e2e05440b2e438d9541822dc4d", "tree": "e373be2998ac4914122f9da76398be980d0dbd47", "parents": [ "c63e09ecccb50f930e899d7005edc5411ee86d4f" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Jun 24 03:12:00 2009 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Jun 24 08:15:26 2009 -0400" }, "message": "... and the same for vfsmount id/mount group id\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "c63e09ecccb50f930e899d7005edc5411ee86d4f", "tree": "aafa5169cde98a2bb8327fcc948c76dba0746322", "parents": [ "7e325d3a6b117c7288bfc0755410e9d9d2b71326" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Jun 24 02:05:18 2009 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Jun 24 08:15:25 2009 -0400" }, "message": "Make allocation of anon devices cheaper\n\nStandard trick - add a new variable (start) such that\nfor each n \u003c start n is known to be busy. Allocation can\nskip checking everything in [0..start) and if it returns\nn, we can set start to n + 1. Freeing below start sets\nstart to what we\u0027d just freed.\n\nOf course, it still sucks if we do something like\n\tfree 0\n\tallocate\n\tallocate\nin a loop - still O(n^2) time. However, on saner loads it\nimproves the things a lot and the entire thing is not worth\nthe trouble of switching to something with better worst-case\nbehaviour.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "b0895513f499b8f786d292ce48589ca210ca1d6e", "tree": "e7e7e684f19a930ca029afa08396aa5170e7fb3d", "parents": [ "210ad6aedb332e73167ece5af9bd47f0da8c2aca" ], "author": { "name": "J. R. Okajima", "email": "hooanon05@yahoo.co.jp", "time": "Wed Jun 17 01:16:50 2009 +0900" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed Jun 17 00:36:35 2009 -0400" }, "message": "remove unlock_kernel() left accidentally\n\ncommit 337eb00a2c3a421999c39c94ce7e33545ee8baa7\nPush BKL down into -\u003eremount_fs()\nand\ncommit 4aa98cf768b6f2ea4b204620d949a665959214f6\nPush BKL down into do_remount_sb()\n\nwere uncorrectly merged.\nThe former removes one pair of lock/unlock_kernel(), but the latter adds\nseveral unlock_kernel(). Finally a few unlock_kernel() calls left.\n\nSigned-off-by: J. R. Okajima \u003chooanon05@yahoo.co.jp\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "337eb00a2c3a421999c39c94ce7e33545ee8baa7", "tree": "d9b780d095b638b1d8fa23841ff70347cf5daa08", "parents": [ "4195f73d1329e49727bcceb028e58cb38376c2b0" ], "author": { "name": "Alessio Igor Bogani", "email": "abogani@texware.it", "time": "Tue May 12 15:10:54 2009 +0200" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Jun 11 21:36:11 2009 -0400" }, "message": "Push BKL down into -\u003eremount_fs()\n\n[xfs, btrfs, capifs, shmem don\u0027t need BKL, exempt]\n\nSigned-off-by: Alessio Igor Bogani \u003cabogani@texware.it\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "ebc1ac164560a241d9bf1b7519062910c3f90a01", "tree": "db17fd3043b15f8269cce2c2d00213814022fc30", "parents": [ "01ba687577647beef6c5f2ea59bfb56fac9fcde2" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Mon May 11 23:35:03 2009 +0200" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Jun 11 21:36:09 2009 -0400" }, "message": "-\u003ewrite_super lock_super pushdown\n\nPush down lock_super into -\u003ewrite_super instances and remove it from the\ncaller.\n\nFollowing filesystem don\u0027t need -\u003es_lock in -\u003ewrite_super and are skipped:\n\n * bfs, nilfs2 - no other uses of s_lock and have internal locks in\n\t-\u003ewrite_super\n * ext2 - uses BKL in ext2_write_super and has internal calls without s_lock\n * reiserfs - no other uses of s_lock as has reiserfs_write_lock (BKL) in\n \t-\u003ewrite_super\n * xfs - no other uses of s_lock and uses internal lock (buffer lock on\n\tsuperblock buffer) to serialize -\u003ewrite_super. Also xfs_fs_write_super\n\tis superflous and will go away in the next merge window\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "4aa98cf768b6f2ea4b204620d949a665959214f6", "tree": "dd6f5be97396b9e1f24a9697524da19463e7a8da", "parents": [ "7f78d4cd4c5d01864943c22b79df1b6bde923129" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Fri May 08 13:36:58 2009 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Jun 11 21:36:08 2009 -0400" }, "message": "Push BKL down into do_remount_sb()\n\n[folded fix from Jiri Slaby]\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "bbd6851a3213a525128473e978b692ab6ac11aba", "tree": "8ebddebadd8992871ab98456187cb00849a82058", "parents": [ "6cfd0148425e528b859b26e436b01f23f6926224" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Wed May 06 10:43:07 2009 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Jun 11 21:36:08 2009 -0400" }, "message": "Push lock_super() into the -\u003eremount_fs() of filesystems that care about it\n\nNote that since we can\u0027t run into contention between remount_fs and write_super\n(due to exclusion on s_umount), we have to care only about filesystems that\ntouch lock_super() on their own. Out of those ext3, ext4, hpfs, sysv and ufs\ndo need it; fat doesn\u0027t since its -\u003eremount_fs() only accesses assign-once\ndata (basically, it\u0027s \"we have no atime on directories and only have atime on\nfiles for vfat; force nodiratime and possibly noatime into *flags\").\n\n[folded a build fix from hch]\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "6cfd0148425e528b859b26e436b01f23f6926224", "tree": "60e3257053554ff198fe5825e6f12a00c3b4422a", "parents": [ "a9e220f8322e2b0e0b8903fe00265461cffad3f0" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Tue May 05 15:40:36 2009 +0200" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Jun 11 21:36:07 2009 -0400" }, "message": "push BKL down into -\u003eput_super\n\nMove BKL into -\u003eput_super from the only caller. A couple of\nfilesystems had trivial enough -\u003eput_super (only kfree and NULLing of\ns_fs_info + stuff in there) to not get any locking: coda, cramfs, efs,\nhugetlbfs, omfs, qnx4, shmem, all others got the full treatment. Most\nof them probably don\u0027t need it, but I\u0027d rather sort that out individually.\nPreferably after all the other BKL pushdowns in that area.\n\n[AV: original used to move lock_super() down as well; these changes are\nremoved since we don\u0027t do lock_super() at all in generic_shutdown_super()\nnow]\n[AV: fuse, btrfs and xfs are known to need no damn BKL, exempt]\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "a9e220f8322e2b0e0b8903fe00265461cffad3f0", "tree": "b3be7d58b8eb9fd810636223f0458191ec1b9d75", "parents": [ "62c6943b4b1e818aea60c11c5a68a50785b83119" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue May 05 22:10:44 2009 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Jun 11 21:36:07 2009 -0400" }, "message": "No need to do lock_super() for exclusion in generic_shutdown_super()\n\nWe can\u0027t run into contention on it. All other callers of lock_super()\neither hold s_umount (and we have it exclusive) or hold an active\nreference to superblock in question, which prevents the call of\ngeneric_shutdown_super() while the reference is held. So we can\nreplace lock_super(s) with get_fs_excl() in generic_shutdown_super()\n(and corresponding change for unlock_super(), of course).\n\nSince ext4 expects s_lock held for its put_super, take lock_super()\ninto it. The rest of filesystems do not care at all.\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "443b94baaa16771e98b29ca7c24f1e305738ffca", "tree": "cf498a25d012330928e0315222c46ea90c200530", "parents": [ "5af7926ff33b68b3ba46531471c6e0564b285efc" ], "author": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Tue May 05 23:48:50 2009 -0400" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Jun 11 21:36:07 2009 -0400" }, "message": "Make sure that all callers of remount hold s_umount exclusive\n\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "e5004753388dcf5e1b8a52ac0ab807d232340fbb", "tree": "4a74a93f1468acb111ba9a3e9ed4a55f338f51fe", "parents": [ "f3da392e9ff14b9f388e74319e6d195848991c07" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Tue May 05 16:08:56 2009 +0200" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Jun 11 21:36:06 2009 -0400" }, "message": "cleanup sync_supers\n\nMerge the write_super helper into sync_super and move the check for\n-\u003ewrite_super earlier so that we can avoid grabbing a reference to\na superblock that doesn\u0027t have it.\n\nWhile we\u0027re at it also add a little comment documenting sync_supers.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "8c85e125124a473d6f3e9bb187b0b84207f81d91", "tree": "d883424a156c00c55193e46567efdffddb6ef6b9", "parents": [ "517bfae28353e996160518add4d00033d3886e61" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Tue Apr 28 18:00:26 2009 +0200" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Jun 11 21:36:06 2009 -0400" }, "message": "remove -\u003ewrite_super call in generic_shutdown_super\n\nWe just did a full fs writeout using sync_filesystem before, and if\nthat\u0027s not enough for the filesystem it can perform it\u0027s own writeout\nin -\u003eput_super, which many filesystems already do.\n\nMove a call to foofs_write_super into every foofs_put_super for now to\nguarantee identical behaviour until it\u0027s cleaned up by the individual\nfilesystem maintainers.\n\nExceptions:\n\n - affs already has identical copy \u0026 pasted code at the beginning of\n affs_put_super so no need to do it twice.\n - xfs does the right thing without it and I have changes pending for\n the xfs tree touching this are so I don\u0027t really need conflicts\n here..\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "60b0680fa236ac4e17ce31a50048c9d75f9ec831", "tree": "c8ca34340a173326694247eab779e713c57202c2", "parents": [ "c15c54f5f056ee4819da9fde59a5f2cd45445f23" ], "author": { "name": "Jan Kara", "email": "jack@suse.cz", "time": "Mon Apr 27 16:43:53 2009 +0200" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Jun 11 21:36:04 2009 -0400" }, "message": "vfs: Rename fsync_super() to sync_filesystem() (version 4)\n\nRename the function so that it better describe what it really does. Also\nremove the unnecessary include of buffer_head.h.\n\nSigned-off-by: Jan Kara \u003cjack@suse.cz\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "c15c54f5f056ee4819da9fde59a5f2cd45445f23", "tree": "0b8d142f0b8d44b71bf7ff9db7a373f90d0556a3", "parents": [ "5cee5815d1564bbbd505fea86f4550f1efdb5cd0" ], "author": { "name": "Jan Kara", "email": "jack@suse.cz", "time": "Mon Apr 27 16:43:52 2009 +0200" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Jun 11 21:36:04 2009 -0400" }, "message": "vfs: Move syncing code from super.c to sync.c (version 4)\n\nMove sync_filesystems(), __fsync_super(), fsync_super() from\nsuper.c to sync.c where it fits better.\n\n[build fixes folded]\n\nSigned-off-by: Jan Kara \u003cjack@suse.cz\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "5cee5815d1564bbbd505fea86f4550f1efdb5cd0", "tree": "ba99c38932dc534bf56f0d7dcfeeca153f50b007", "parents": [ "429479f031322a0cc5c921ffb2321a51718dc875" ], "author": { "name": "Jan Kara", "email": "jack@suse.cz", "time": "Mon Apr 27 16:43:51 2009 +0200" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu Jun 11 21:36:03 2009 -0400" }, "message": "vfs: Make sys_sync() use fsync_super() (version 4)\n\nIt is unnecessarily fragile to have two places (fsync_super() and do_sync())\ndoing data integrity sync of the filesystem. Alter __fsync_super() to\naccommodate needs of both callers and use it. So after this patch\n__fsync_super() is the only place where we gather all the calls needed to\nproperly send all data on a filesystem to disk.\n\nNice bonus is that we get a complete livelock avoidance and write_supers()\nis now only used for periodic writeback of superblocks.\n\nsync_blockdevs() introduced a couple of patches ago is gone now.\n\n[build fixes folded]\n\nSigned-off-by: Jan Kara \u003cjack@suse.cz\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" } ], "next": "429479f031322a0cc5c921ffb2321a51718dc875" }