)]}' { "log": [ { "commit": "914ee295af418e936ec20a08c1663eaabe4cd07a", "tree": "2e880ea913b8cbadf22b2288b5c278c2e5eadb60", "parents": [ "f106e82caaa0d943e47cacc184f5b40d538e0044" ], "author": { "name": "Xin Zhong", "email": "xin.zhong@intel.com", "time": "Thu Dec 09 09:30:14 2010 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Dec 10 16:29:10 2010 -0500" }, "message": "Btrfs: pwrite blocked when writing from the mmaped buffer of the same page\n\nThis problem is found in meego testing:\nhttp://bugs.meego.com/show_bug.cgi?id\u003d6672\nA file in btrfs is mmaped and the mmaped buffer is passed to pwrite to write to the same page\nof the same file. In btrfs_file_aio_write(), the pages is locked by prepare_pages(). So when\nbtrfs_copy_from_user() is called, page fault happens and the same page needs to be locked again\nin filemap_fault(). The fix is to move iov_iter_fault_in_readable() before prepage_pages() to make page\nfault happen before pages are locked. And also disable page fault in critical region in\nbtrfs_copy_from_user().\n\nReviewed-by: Yan, Zheng\u003czheng.z.yan@intel.com\u003e\nSigned-off-by: Zhong, Xin \u003cxin.zhong@intel.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "495e86779f4f319828bc10dfc0c9ac2161868077", "tree": "62729f2b65c9565fadb551bd8d343d6c57d7cb85", "parents": [ "6a912213046ecb6511fdf35531a0c7de3de963c9" ], "author": { "name": "Josef Bacik", "email": "josef@redhat.com", "time": "Fri Nov 19 20:36:10 2010 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Sun Nov 21 22:26:09 2010 -0500" }, "message": "Btrfs: hold i_mutex when calling btrfs_log_dentry_safe\n\nSince we walk up the path logging all of the parts of the inode\u0027s path, we need\nto hold i_mutex to make sure that the inode is not renamed while we\u0027re logging\neverything. btrfs_log_dentry_safe does dget_parent and all of that jazz, but we\nmay get unexpected results if the rename changes the inode\u0027s location while\nwe\u0027re higher up the path logging those dentries, so do this for safety reasons.\nThanks,\n\nSigned-off-by: Josef Bacik \u003cjosef@redhat.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "b25b550bb153626df6a48eb8583e923e3dfcf64a", "tree": "baca9843877b8b3a254cde92ac2a9072014b5621", "parents": [ "eda054770e5cd0e9ee1568dfcbcf39f9ade4f545", "6f902af400b2499c80865c62a06fbbd15cf804fd" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jun 11 14:18:47 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jun 11 14:18:47 2010 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:\n Btrfs: The file argument for fsync() is never null\n Btrfs: handle ERR_PTR from posix_acl_from_xattr()\n Btrfs: avoid BUG when dropping root and reference in same transaction\n Btrfs: prohibit a operation of changing acl\u0027s mask when noacl mount option used\n Btrfs: should add a permission check for setfacl\n Btrfs: btrfs_lookup_dir_item() can return ERR_PTR\n Btrfs: btrfs_read_fs_root_no_name() returns ERR_PTRs\n Btrfs: unwind after btrfs_start_transaction() errors\n Btrfs: btrfs_iget() returns ERR_PTR\n Btrfs: handle kzalloc() failure in open_ctree()\n Btrfs: handle error returns from btrfs_lookup_dir_item()\n Btrfs: Fix BUG_ON for fs converted from extN\n Btrfs: Fix null dereference in relocation.c\n Btrfs: fix remap_file_pages error\n Btrfs: uninitialized data is check_path_shared()\n Btrfs: fix fallocate regression\n Btrfs: fix loop device on top of btrfs\n" }, { "commit": "6f902af400b2499c80865c62a06fbbd15cf804fd", "tree": "9bd7ee1dd243b5513ebad74b2870950a6d427d3c", "parents": [ "834e74759a473f8101a273e843d1edec2778801d" ], "author": { "name": "Dan Carpenter", "email": "error27@gmail.com", "time": "Sat May 29 09:49:07 2010 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Jun 11 15:57:40 2010 -0400" }, "message": "Btrfs: The file argument for fsync() is never null\n\nThe \"file\" argument for fsync is never null so we can remove this check.\n\nWhat drew my attention here is that 7ea8085910e: \"drop unused dentry\nargument to -\u003efsync\" introduced an unconditional dereference at the\nstart of the function and that generated a smatch warning.\n\nSigned-off-by: Dan Carpenter \u003cerror27@gmail.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "058a457ef0ce28d595af53d6103db73332383cbc", "tree": "7f17117d57c90839cd6d50e588cba0bca97a0de6", "parents": [ "0e4dcbef1c0c3e29f9c7f824359445d385b2649a" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Thu May 20 07:21:50 2010 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Jun 11 11:46:12 2010 -0400" }, "message": "Btrfs: fix remap_file_pages error\n\nwhen we use remap_file_pages() to remap a file, remap_file_pages always return\nerror. It is because btrfs didn\u0027t set VM_CAN_NONLINEAR for vma.\n\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "4a001071d3549f596c7c3736c5dda8a3a4aba9ed", "tree": "f835cbd0779a8912aa65669bbd44ce3f756c919f", "parents": [ "9aeead73782c4b8e2a91def36dbf95db28605c95" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Mon Jun 07 03:38:51 2010 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Jun 11 11:46:11 2010 -0400" }, "message": "Btrfs: fix loop device on top of btrfs\n\nWe cannot use the loop device which has been connected to a file in the btrf\n\nThe reproduce steps is following:\n # dd if\u003d/dev/zero of\u003dvdev0 bs\u003d1M count\u003d1024\n # losetup /dev/loop0 vdev0\n # mkfs.btrfs /dev/loop0\n ...\n failed to zero device start -5\n\nThe reason is that the btrfs don\u0027t implement either -\u003ewrite_begin or -\u003ewrite\nthe VFS API, so we fix it by setting -\u003ewrite to do_sync_write().\n\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "7ea8085910ef3dd4f3cad6845aaa2b580d39b115", "tree": "d9c1edb5906f943f7d70bfb4b65106e29772d379", "parents": [ "cc967be54710d97c05229b2e5ba2d00df84ddd64" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Wed May 26 17:53:25 2010 +0200" }, "committer": { "name": "Al Viro", "email": "viro@zeniv.linux.org.uk", "time": "Thu May 27 22:05:02 2010 -0400" }, "message": "drop unused dentry argument to -\u003efsync\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\n" }, { "commit": "3f7c579c41a3d20af76fd6ff1f6b949edf105fd1", "tree": "374d50346763fb37299f5de93f48901596f21e59", "parents": [ "4845e44ffdb26be9b25610664228e8ecaf949a0d" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed May 26 10:59:53 2010 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed May 26 10:59:53 2010 -0400" }, "message": "Btrfs: move O_DIRECT space reservation to btrfs_direct_IO\n\nThis moves the delalloc space reservation done for O_DIRECT\ninto btrfs_direct_IO. This way we don\u0027t leak reserved space\nif the generic O_DIRECT write code errors out before it\ncalls into btrfs_direct_IO.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "4845e44ffdb26be9b25610664228e8ecaf949a0d", "tree": "8852e175b6b02a36df6b47c54d574f3365ddb34f", "parents": [ "eaf25d933e64c2bf3c79b83e8820404f36fdfc52" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue May 25 20:56:50 2010 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue May 25 21:52:08 2010 -0400" }, "message": "Btrfs: rework O_DIRECT enospc handling\n\nThis changes O_DIRECT write code to mark extents as delalloc\nwhile it is processing them. Yan Zheng has reworked the\nenospc accounting based on tracking delalloc extents and\nthis makes it much easier to track enospc in the O_DIRECT code.\n\nThere are a few space cases with the O_DIRECT code though,\nit only sets the EXTENT_DELALLOC bits, instead of doing\nEXTENT_DELALLOC | EXTENT_DIRTY | EXTENT_UPTODATE, because\nwe don\u0027t want to mess with clearing the dirty and uptodate\nbits when things go wrong. This is important because there\nare no pages in the page cache, so any extent state structs\nthat we put in the tree won\u0027t get freed by releasepage. We have\nto clear them ourselves as the DIO ends.\n\nWith this commit, we reserve space at in btrfs_file_aio_write,\nand then as each btrfs_direct_IO call progresses it sets\nEXTENT_DELALLOC on the range.\n\nbtrfs_get_blocks_direct is responsible for clearing the delalloc\nat the same time it drops the extent lock.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "11c65dccf70be9ace5dbd3906778e1a099b1fee1", "tree": "1289f139ddf652e39672374b6f9051994c21ce57", "parents": [ "4b46fce23349bfca781a32e2707a18328ca5ae22" ], "author": { "name": "Josef Bacik", "email": "josef@redhat.com", "time": "Sun May 23 11:07:21 2010 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue May 25 10:34:57 2010 -0400" }, "message": "Btrfs: do aio_write instead of write\n\nIn order for AIO to work, we need to implement aio_write. This patch converts\nour btrfs_file_write to btrfs_aio_write. I\u0027ve tested this with xfstests and\nnothing broke, and the AIO stuff magically started working. Thanks,\n\nSigned-off-by: Josef Bacik \u003cjosef@redhat.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "4b46fce23349bfca781a32e2707a18328ca5ae22", "tree": "68f1200f2bc82d3f35218aef38e6d5d92bff4aca", "parents": [ "c2c6ca417e2db7a519e6e92c82f4a933d940d076" ], "author": { "name": "Josef Bacik", "email": "josef@redhat.com", "time": "Sun May 23 11:00:55 2010 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue May 25 10:34:57 2010 -0400" }, "message": "Btrfs: add basic DIO read/write support\n\nThis provides basic DIO support for reading and writing. It does not do the\nwork to recover from mismatching checksums, that will come later. A few design\nchanges have been made from Jim\u0027s code (sorry Jim!)\n\n1) Use the generic direct-io code. Jim originally re-wrote all the generic DIO\ncode in order to account for all of BTRFS\u0027s oddities, but thanks to that work it\nseems like the best bet is to just ignore compression and such and just opt to\nfallback on buffered IO.\n\n2) Fallback on buffered IO for compressed or inline extents. Jim\u0027s code did\nit\u0027s own buffering to make dio with compressed extents work. Now we just\nfallback onto normal buffered IO.\n\n3) Use ordered extents for the writes so that all of the\n\nlock_extent()\nlookup_ordered()\n\ntype checks continue to work.\n\n4) Do the lock_extent() lookup_ordered() loop in readpage so we don\u0027t race with\nDIO writes.\n\nI\u0027ve tested this with fsx and everything works great. This patch depends on my\ndio and filemap.c patches to work. Thanks,\n\nSigned-off-by: Josef Bacik \u003cjosef@redhat.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "0ca1f7ceb1991099ed5273885ebcf4323948c72e", "tree": "10758d6a55c529aced177da3f6bf45cf26361913", "parents": [ "a22285a6a32390195235171b89d157ed1a1fe932" ], "author": { "name": "Yan, Zheng", "email": "zheng.yan@oracle.com", "time": "Sun May 16 10:48:47 2010 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue May 25 10:34:51 2010 -0400" }, "message": "Btrfs: Update metadata reservation for delayed allocation\n\nIntroduce metadata reservation context for delayed allocation\nand update various related functions.\n\nThis patch also introduces EXTENT_FIRST_DELALLOC control bit for\nset/clear_extent_bit. It tells set/clear_bit_hook whether they\nare processing the first extent_state with EXTENT_DELALLOC bit\nset. This change is important if set/clear_extent_bit involves\nmultiple extent_state.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "a22285a6a32390195235171b89d157ed1a1fe932", "tree": "3fabc88a029e1af4f2fdcc708e7b62ef3cf3703a", "parents": [ "f0486c68e4bd9a06a5904d3eeb3a0d73a83befb8" ], "author": { "name": "Yan, Zheng", "email": "zheng.yan@oracle.com", "time": "Sun May 16 10:48:46 2010 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue May 25 10:34:50 2010 -0400" }, "message": "Btrfs: Integrate metadata reservation with start_transaction\n\nBesides simplify the code, this change makes sure all metadata\nreservation for normal metadata operations are released after\ncommitting transaction.\n\nChanges since V1:\n\nAdd code that check if unlink and rmdir will free space.\n\nAdd ENOSPC handling for clone ioctl.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "5a0e3ad6af8660be21ca98a971cd00f331318c05", "tree": "5bfb7be11a03176a87296a43ac6647975c00a1d1", "parents": [ "ed391f4ebf8f701d3566423ce8f17e614cde9806" ], "author": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Wed Mar 24 17:04:11 2010 +0900" }, "committer": { "name": "Tejun Heo", "email": "tj@kernel.org", "time": "Tue Mar 30 22:02:32 2010 +0900" }, "message": "include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h\n\npercpu.h is included by sched.h and module.h and thus ends up being\nincluded when building most .c files. percpu.h includes slab.h which\nin turn includes gfp.h making everything defined by the two files\nuniversally available and complicating inclusion dependencies.\n\npercpu.h -\u003e slab.h dependency is about to be removed. Prepare for\nthis change by updating users of gfp and slab facilities include those\nheaders directly instead of assuming availability. As this conversion\nneeds to touch large number of source files, the following script is\nused as the basis of conversion.\n\n http://userweb.kernel.org/~tj/misc/slabh-sweep.py\n\nThe script does the followings.\n\n* Scan files for gfp and slab usages and update includes such that\n only the necessary includes are there. ie. if only gfp is used,\n gfp.h, if slab is used, slab.h.\n\n* When the script inserts a new include, it looks at the include\n blocks and try to put the new include such that its order conforms\n to its surrounding. It\u0027s put in the include block which contains\n core kernel includes, in the same order that the rest are ordered -\n alphabetical, Christmas tree, rev-Xmas-tree or at the end if there\n doesn\u0027t seem to be any matching order.\n\n* If the script can\u0027t find a place to put a new include (mostly\n because the file doesn\u0027t have fitting include block), it prints out\n an error message indicating which .h file needs to be added to the\n file.\n\nThe conversion was done in the following steps.\n\n1. The initial automatic conversion of all .c files updated slightly\n over 4000 files, deleting around 700 includes and adding ~480 gfp.h\n and ~3000 slab.h inclusions. The script emitted errors for ~400\n files.\n\n2. Each error was manually checked. Some didn\u0027t need the inclusion,\n some needed manual addition while adding it to implementation .h or\n embedding .c file was more appropriate for others. This step added\n inclusions to around 150 files.\n\n3. The script was run again and the output was compared to the edits\n from #2 to make sure no file was left behind.\n\n4. Several build tests were done and a couple of problems were fixed.\n e.g. lib/decompress_*.c used malloc/free() wrappers around slab\n APIs requiring slab.h to be added manually.\n\n5. The script was run on all .h files but without automatically\n editing them as sprinkling gfp.h and slab.h inclusions around .h\n files could easily lead to inclusion dependency hell. Most gfp.h\n inclusion directives were ignored as stuff from gfp.h was usually\n wildly available and often used in preprocessor macros. Each\n slab.h inclusion directive was examined and added manually as\n necessary.\n\n6. percpu.h was updated not to include slab.h.\n\n7. Build test were done on the following configurations and failures\n were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my\n distributed build env didn\u0027t work with gcov compiles) and a few\n more options had to be turned off depending on archs to make things\n build (like ipr on powerpc/64 which failed due to missing writeq).\n\n * x86 and x86_64 UP and SMP allmodconfig and a custom test config.\n * powerpc and powerpc64 SMP allmodconfig\n * sparc and sparc64 SMP allmodconfig\n * ia64 SMP allmodconfig\n * s390 SMP allmodconfig\n * alpha SMP allmodconfig\n * um on x86_64 SMP allmodconfig\n\n8. percpu.h modifications were reverted so that it could be applied as\n a separate patch and serve as bisection point.\n\nGiven the fact that I had only a couple of failures from tests on step\n6, I\u0027m fairly confident about the coverage of this conversion patch.\nIf there is a breakage, it\u0027s likely to be something in one of the arch\nheaders which should be easily discoverable easily on most builds of\nthe specific arch.\n\nSigned-off-by: Tejun Heo \u003ctj@kernel.org\u003e\nGuess-its-ok-by: Christoph Lameter \u003ccl@linux-foundation.org\u003e\nCc: Ingo Molnar \u003cmingo@redhat.com\u003e\nCc: Lee Schermerhorn \u003cLee.Schermerhorn@hp.com\u003e\n" }, { "commit": "441f4058a04b2943685ff94e0f5f1992b0b3649e", "tree": "80a61f6dddcf7d5831a8bd3771ffa2b430af3935", "parents": [ "7c34691abe23741bfc7d2514efd5a39f0e0ecb06", "8ad6fcab564c5bc956bdc3dfa440ab152b6e780f" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 18 16:50:55 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Mar 18 16:50:55 2010 -0700" }, "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: (30 commits)\n Btrfs: fix the inode ref searches done by btrfs_search_path_in_tree\n Btrfs: allow treeid\u003d\u003d0 in the inode lookup ioctl\n Btrfs: return keys for large items to the search ioctl\n Btrfs: fix key checks and advance in the search ioctl\n Btrfs: buffer results in the space_info ioctl\n Btrfs: use __u64 types in ioctl.h\n Btrfs: fix search_ioctl key advance\n Btrfs: fix gfp flags masking in the compression code\n Btrfs: don\u0027t look at bio flags after submit_bio\n btrfs: using btrfs_stack_device_id() get devid\n btrfs: use memparse\n Btrfs: add a \"df\" ioctl for btrfs\n Btrfs: cache the extent state everywhere we possibly can V2\n Btrfs: cache ordered extent when completing io\n Btrfs: cache extent state in find_delalloc_range\n Btrfs: change the ordered tree to use a spinlock instead of a mutex\n Btrfs: finish read pages in the order they are submitted\n btrfs: fix btrfs_mkdir goto for no free objectids\n Btrfs: flush data on snapshot creation\n Btrfs: make df be a little bit more understandable\n ...\n" }, { "commit": "2ac55d41b5d6bf49e76bc85db5431240617e2f8f", "tree": "ee8e2a716ef0b50388ef5e4a86387ec0499bca89", "parents": [ "5a1a3df1f6c86926cfe8657e6f9b4b4c2f467d60" ], "author": { "name": "Josef Bacik", "email": "josef@redhat.com", "time": "Wed Feb 03 19:33:23 2010 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Mar 15 11:00:13 2010 -0400" }, "message": "Btrfs: cache the extent state everywhere we possibly can V2\n\nThis patch just goes through and fixes everybody that does\n\nlock_extent()\nblah\nunlock_extent()\n\nto use\n\nlock_extent_bits()\nblah\nunlock_extent_cached()\n\nand pass around a extent_state so we only have to do the searches once per\nfunction. This gives me about a 3 mb/s boots on my random write test. I have\nnot converted some things, like the relocation and ioctl\u0027s, since they aren\u0027t\nheavily used and the relocation stuff is in the middle of being re-written. I\nalso changed the clear_extent_bit() to only unset the cached state if we are\nclearing EXTENT_LOCKED and related stuff, so we can do things like this\n\nlock_extent_bits()\nclear delalloc bits\nunlock_extent_cached()\n\nwithout losing our cached state. I tested this thoroughly and turned on\nLEAK_DEBUG to make sure we weren\u0027t leaking extent states, everything worked out\nfine.\n\nSigned-off-by: Josef Bacik \u003cjosef@redhat.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "0813e22d4e0d618eac9b47bec942bf856adca4c5", "tree": "4d2b1a9717e6cdbab7966ce2d0ae698a52d46ae0", "parents": [ "382640b3372405c40b7646c68a50ca91358027e4", "3f6fae9559225741c91f1320090b285da1413290" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Feb 15 19:56:21 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Feb 15 19:56:21 2010 -0800" }, "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:\n Btrfs: btrfs_mark_extent_written uses the wrong slot\n" }, { "commit": "3f6fae9559225741c91f1320090b285da1413290", "tree": "94c1a90aaed740d80cfa701b8c4abad5bbb699df", "parents": [ "23b5c50945f2294add0137799400329c0ebba290" ], "author": { "name": "Shaohua Li", "email": "shaohua.li@intel.com", "time": "Thu Feb 11 07:43:00 2010 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Feb 12 16:47:19 2010 -0500" }, "message": "Btrfs: btrfs_mark_extent_written uses the wrong slot\n\nMy test do: fallocate a big file and do write. The file is 512M, but\nafter file write is done btrfs-debug-tree shows:\nitem 6 key (257 EXTENT_DATA 0) itemoff 3516 itemsize 53\n extent data disk byte 1103101952 nr 536870912\n extent data offset 0 nr 399634432 ram 536870912\n extent compression 0\nLooks like a regression introducted by\n6c7d54ac87f338c479d9729e8392eca3f76e11e1, where we set wrong slot.\n\nSigned-off-by: Shaohua Li \u003cshaohua.li@intel.com\u003e\nAcked-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "adbfbcd12af3d183957622a99ca009b665639b81", "tree": "830e5cc6a0dbd5cb590b8484c4234bd65073d1d7", "parents": [ "fc76be434d90bcd57a0ea6b93a2e66a3fec4b664", "23b5c50945f2294add0137799400329c0ebba290" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Feb 05 07:23:03 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Feb 05 07:23:03 2010 -0800" }, "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:\n Btrfs: apply updated fallocate i_size fix\n Btrfs: do not try and lookup the file extent when finishing ordered io\n Btrfs: Fix oopsen when dropping empty tree.\n Btrfs: remove BUG_ON() due to mounting bad filesystem\n Btrfs: make error return negative in btrfs_sync_file()\n Btrfs: fix race between allocate and release extent buffer.\n" }, { "commit": "014e4ac4f7d9c981750491fa40ea35efadc9ed49", "tree": "23f98b1cac63db1f12060d3a2d2dbc77b49019b3", "parents": [ "f044ba7835b84e69c68b620ca8fa27e5ef67759d" ], "author": { "name": "Roel Kluin", "email": "roel.kluin@gmail.com", "time": "Fri Jan 29 10:42:11 2010 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Feb 04 11:31:44 2010 -0500" }, "message": "Btrfs: make error return negative in btrfs_sync_file()\n\nIt appears the error return should be negative\n\nSigned-off-by: Roel Kluin \u003croel.kluin@gmail.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "30a0f5e1fb510f17c25ff159a9fffbe01ae0f34e", "tree": "3392e115d4d5767c8bdaeac8696a2465d65a1e91", "parents": [ "88f5004430babb836cfce886d5d54c82166f8ba4", "11dfe35a0108097f2df1f042c485fa7f758c2cdf" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 21 07:28:05 2010 -0800" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jan 21 07:28:05 2010 -0800" }, "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:\n Btrfs: fix possible panic on unmount\n Btrfs: deal with NULL acl sent to btrfs_set_acl\n Btrfs: fix regression in orphan cleanup\n Btrfs: Fix race in btrfs_mark_extent_written\n Btrfs, fix memory leaks in error paths\n Btrfs: align offsets for btrfs_ordered_update_i_size\n btrfs: fix missing last-entry in readdir(3)\n" }, { "commit": "6c7d54ac87f338c479d9729e8392eca3f76e11e1", "tree": "3815913df585d7cbc8ba6a4c151328daa4720c7c", "parents": [ "2423fdfb96e3f9ff3baeb6c4c78d74145547891d" ], "author": { "name": "Yan, Zheng", "email": "zheng.yan@oracle.com", "time": "Fri Jan 15 08:43:09 2010 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Sun Jan 17 20:40:21 2010 -0500" }, "message": "Btrfs: Fix race in btrfs_mark_extent_written\n\nFix bug reported by Johannes Hirte. The reason of that bug\nis btrfs_del_items is called after btrfs_duplicate_item and\nbtrfs_del_items triggers tree balance. The fix is check that\ncase and call btrfs_search_slot when needed.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "ebfee3d71d5a29102aac1fb2e756b8258f753592", "tree": "fa18938a56d452eb02c24f106dd06cc78f475e4b", "parents": [ "b8a7f3cd7e8212e5c572178ff3b5a514861036a5", "83d3c9696fed237a3d96fce18299e2fcf112109f" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Dec 17 15:02:22 2009 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Dec 17 15:02:22 2009 -0500" }, "message": "Merge branch btrfs-master into for-linus\n\nConflicts:\n\tfs/btrfs/acl.c\n" }, { "commit": "55ef68990029fcd8d04d42fc184aa7fb18cf309e", "tree": "0487a5d15586e94de29be3c8701cb64eb1ae2f9b", "parents": [ "24bbcf0442ee04660a5a030efdbb6d03f1c275cb" ], "author": { "name": "Yan, Zheng", "email": "zheng.yan@oracle.com", "time": "Thu Nov 12 09:36:44 2009 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Dec 17 12:33:35 2009 -0500" }, "message": "Btrfs: Fix btrfs_drop_extent_cache for skip pinned case\n\nThe check for skip pinned case is wrong, it may breaks the\nwhile loop too soon.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "920bbbfb05c9fce22e088d20eb9dcb8f96342de9", "tree": "b972b3f39ebefb9c026300c1981d18cad769e431", "parents": [ "ad48fd754676bfae4139be1a897b1ea58f9aaf21" ], "author": { "name": "Yan, Zheng", "email": "zheng.yan@oracle.com", "time": "Thu Nov 12 09:34:08 2009 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Dec 15 21:24:52 2009 -0500" }, "message": "Btrfs: Rewrite btrfs_drop_extents\n\nRewrite btrfs_drop_extents by using btrfs_duplicate_item, so we can\navoid calling lock_extent within transaction.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "6b2f3d1f769be5779b479c37800229d9a4809fc3", "tree": "046ef6736ec6c25ab1c68741ba715d13645af336", "parents": [ "59bc055211b8d266ab6089158058bf8268e02006" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Tue Oct 27 11:05:28 2009 +0100" }, "committer": { "name": "Jan Kara", "email": "jack@suse.cz", "time": "Thu Dec 10 15:02:50 2009 +0100" }, "message": "vfs: Implement proper O_SYNC semantics\n\nWhile Linux provided an O_SYNC flag basically since day 1, it took until\nLinux 2.4.0-test12pre2 to actually get it implemented for filesystems,\nsince that day we had generic_osync_around with only minor changes and the\ngreat \"For now, when the user asks for O_SYNC, we\u0027ll actually give\nO_DSYNC\" comment. This patch intends to actually give us real O_SYNC\nsemantics in addition to the O_DSYNC semantics. After Jan\u0027s O_SYNC\npatches which are required before this patch it\u0027s actually surprisingly\nsimple, we just need to figure out when to set the datasync flag to\nvfs_fsync_range and when not.\n\nThis patch renames the existing O_SYNC flag to O_DSYNC while keeping it\u0027s\nnumerical value to keep binary compatibility, and adds a new real O_SYNC\nflag. To guarantee backwards compatiblity it is defined as expanding to\nboth the O_DSYNC and the new additional binary flag (__O_SYNC) to make\nsure we are backwards-compatible when compiled against the new headers.\n\nThis also means that all places that don\u0027t care about the differences can\njust check O_DSYNC and get the right behaviour for O_SYNC, too - only\nplaces that actuall care need to check __O_SYNC in addition. Drivers and\nnetwork filesystems have been updated in a fail safe way to always do the\nfull sync magic if O_DSYNC is set. The few places setting O_SYNC for\nlower layers are kept that way for now to stay failsafe.\n\nWe enforce that O_DSYNC is set when __O_SYNC is set early in the open path\nto make sure we always get these sane options.\n\nNote that parisc really screwed up their headers as they already define a\nO_DSYNC that has always been a no-op. We try to repair it by using it for\nthe new O_DSYNC and redefinining O_SYNC to send both the traditional\nO_SYNC numerical value _and_ the O_DSYNC one.\n\nCc: Richard Henderson \u003crth@twiddle.net\u003e\nCc: Ivan Kokshaysky \u003cink@jurassic.park.msu.ru\u003e\nCc: Grant Grundler \u003cgrundler@parisc-linux.org\u003e\nCc: \"David S. Miller\" \u003cdavem@davemloft.net\u003e\nCc: Ingo Molnar \u003cmingo@elte.hu\u003e\nCc: \"H. Peter Anvin\" \u003chpa@zytor.com\u003e\nCc: Thomas Gleixner \u003ctglx@linutronix.de\u003e\nCc: Al Viro \u003cviro@zeniv.linux.org.uk\u003e\nCc: Andreas Dilger \u003cadilger@sun.com\u003e\nAcked-by: Trond Myklebust \u003cTrond.Myklebust@netapp.com\u003e\nAcked-by: Kyle McMartin \u003ckyle@mcmartin.ca\u003e\nAcked-by: Ulrich Drepper \u003cdrepper@redhat.com\u003e\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Jan Kara \u003cjack@suse.cz\u003e\n" }, { "commit": "dcbeb0bec5f2695c3ff53f174efb8e03c209f3f3", "tree": "30d223a3a3c7470c657284ef030657bd1753d4d3", "parents": [ "2b650df2cea96e487f2fd9ecaa68e533ea9b5ed7", "444528b3e614f7f2391488d9bca8e0b872db909b" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 15 15:06:37 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 15 15:06:37 2009 -0700" }, "message": "Merge branch \u0027master\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable\n\n* \u0027master\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:\n Btrfs: always pin metadata in discard mode\n Btrfs: enable discard support\n Btrfs: add -o discard option\n Btrfs: properly wait log writers during log sync\n Btrfs: fix possible ENOSPC problems with truncate\n Btrfs: fix btrfs acl #ifdef checks\n Btrfs: streamline tree-log btree block writeout\n Btrfs: avoid tree log commit when there are no changes\n Btrfs: only write one super copy during fsync\n" }, { "commit": "257c62e1bce03e5b9f3f069fd52ad73a56de71fd", "tree": "ad047fe5796156aa88e3f3600111bf2b8d12759f", "parents": [ "4722607db6a78bd7748c51fa4c8d7371da797254" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Oct 13 13:21:08 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Oct 13 13:35:12 2009 -0400" }, "message": "Btrfs: avoid tree log commit when there are no changes\n\nrpm has a habit of running fdatasync when the file hasn\u0027t\nchanged. We already detect if a file hasn\u0027t been changed\nin the current transaction but it might have been sent to\nthe tree-log in this transaction and not changed since\nthe last call to fsync.\n\nIn this case, we want to avoid a tree log sync, which includes\na number of synchronous writes and barriers. This commit\nextends the existing tracking of the last transaction to change\na file to also track the last sub-transaction.\n\nThe end result is that rpm -ivh and -Uvh are roughly twice as fast,\nand on par with ext3.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "474a503d4bf77ae0cbe484dd0842a2648c0b1c28", "tree": "70e3e4023209e741546491a58622bd45fb13e308", "parents": [ "d43c36dc6b357fa1806800f18aa30123c747a6d1", "ac6889cbb254be1ffea376bea4a96ce9be0e0ed0" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Oct 11 11:23:13 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Oct 11 11:23:13 2009 -0700" }, "message": "Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable\n\n* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:\n Btrfs: fix file clone ioctl for bookend extents\n Btrfs: fix uninit compiler warning in cow_file_range_nocow\n Btrfs: constify dentry_operations\n Btrfs: optimize back reference update during btrfs_drop_snapshot\n Btrfs: remove negative dentry when deleting subvolumne\n Btrfs: optimize fsync for the single writer case\n Btrfs: async delalloc flushing under space pressure\n Btrfs: release delalloc reservations on extent item insertion\n Btrfs: delay clearing EXTENT_DELALLOC for compressed extents\n Btrfs: cleanup extent_clear_unlock_delalloc flags\n Btrfs: fix possible softlockup in the allocator\n Btrfs: fix deadlock on async thread startup\n" }, { "commit": "32c00aff718bb54a214b39146bdd9ac01511cd25", "tree": "c094ee494723a9ebc9d83cb95607f06351665639", "parents": [ "a3429ab70b04363c6190964e82f04f44f3e34cf0" ], "author": { "name": "Josef Bacik", "email": "josef@redhat.com", "time": "Thu Oct 08 13:34:05 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Oct 08 15:21:10 2009 -0400" }, "message": "Btrfs: release delalloc reservations on extent item insertion\n\nThis patch fixes an issue with the delalloc metadata space reservation\ncode. The problem is we used to free the reservation as soon as we\nallocated the delalloc region. The problem with this is if we are not\ninserting an inline extent, we don\u0027t actually insert the extent item until\nafter the ordered extent is written out. This patch does 3 things,\n\n1) It moves the reservation clearing stuff into the ordered code, so when\nwe remove the ordered extent we remove the reservation.\n2) It adds a EXTENT_DO_ACCOUNTING flag that gets passed when we clear\ndelalloc bits in the cases where we want to clear the metadata reservation\nwhen we clear the delalloc extent, in the case that we do an inline extent\nor we invalidate the page.\n3) It adds another waitqueue to the space info so that when we start a fs\nwide delalloc flush, anybody else who also hits that area will simply wait\nfor the flush to finish and then try to make their allocation.\n\nThis has been tested thoroughly to make sure we did not regress on\nperformance.\n\nSigned-off-by: Josef Bacik \u003cjbacik@redhat.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "0efe5e32c8729ef44b00d9a7203e4c99a6378b27", "tree": "8df3309198b2ab87f549c82c59125d2b106bcdbe", "parents": [ "e6a0a8bfef1094084e53bfaad6d512c23da7a6dd", "9c2693c9243b81802c6860570557165e874779a7" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 01 20:23:15 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 01 20:23:15 2009 -0700" }, "message": "Merge branch \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable\n\n* \u0027for-linus\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:\n Btrfs: fix data space leak fix\n Btrfs: remove duplicates of filemap_ helpers\n Btrfs: take i_mutex before generic_write_checks\n Btrfs: fix arguments to btrfs_wait_on_page_writeback_range\n Btrfs: fix deadlock with free space handling and user transactions\n Btrfs: fix error cases for ioctl transactions\n Btrfs: Use CONFIG_BTRFS_POSIX_ACL to enable ACL code\n Btrfs: introduce missing kfree\n Btrfs: Fix setting umask when POSIX ACLs are not enabled\n Btrfs: proper -ENOSPC handling\n" }, { "commit": "828c09509b9695271bcbdc53e9fc9a6a737148d2", "tree": "072ffad6f02db7bf4095e07e2b90247cfa042998", "parents": [ "1c4115e595dec42aa0e81ba47ef46e35b34ed428" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Thu Oct 01 15:43:56 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Oct 01 16:11:11 2009 -0700" }, "message": "const: constify remaining file_operations\n\n[akpm@linux-foundation.org: fix KVM]\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nAcked-by: Mike Frysinger \u003cvapier@gentoo.org\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "8aa38c31b7659e338fee4d9af4c3805acbd9806f", "tree": "44d20f44a432ba05cfcfcd093428e777e4d3fd9e", "parents": [ "25472b880c69c0daa485c4f80a6550437ed1149f" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Thu Oct 01 12:58:30 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Oct 01 12:58:30 2009 -0400" }, "message": "Btrfs: remove duplicates of filemap_ helpers\n\nUse filemap_fdatawrite_range and filemap_fdatawait_range instead of\nlocal copies of the functions. For filemap_fdatawait_range that\nalso means replacing the awkward old wait_on_page_writeback_range\ncalling convention with the regular filemap byte offsets.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "25472b880c69c0daa485c4f80a6550437ed1149f", "tree": "d12bc091e8991513db0d2891111ba773eb5c52e2", "parents": [ "17d857be649a21ca90008c6dc425d849fa83db5c", "ab93dbecfba72bbc04b7036343d180aaff1b61a3" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Oct 01 12:58:13 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Oct 01 12:58:13 2009 -0400" }, "message": "Merge branch \u0027master\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable into for-linus\n" }, { "commit": "ab93dbecfba72bbc04b7036343d180aaff1b61a3", "tree": "6bb523dcf9be0885b6fa9cb6cc9ac694ee089028", "parents": [ "35d62a942db5ae03104929fe7397835b572c4bc4" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Oct 01 12:29:10 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Oct 01 12:29:10 2009 -0400" }, "message": "Btrfs: take i_mutex before generic_write_checks\n\nbtrfs_file_write was incorrectly calling generic_write_checks without\ntaking i_mutex. This lead to problems with racing around i_size when\ndoing O_APPEND writes.\n\nThe fix here is to move i_mutex higher.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "9ed74f2dba6ebf9f30b80554290bfc73cc3ef083", "tree": "763d58a4a11ceca26dcdaedefb1fd662c4e2fa8b", "parents": [ "c65ddb52dc412c9b67681b1aa16cd1bac8434e24" ], "author": { "name": "Josef Bacik", "email": "josef@redhat.com", "time": "Fri Sep 11 16:12:44 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Sep 28 16:29:42 2009 -0400" }, "message": "Btrfs: proper -ENOSPC handling\n\nAt the start of a transaction we do a btrfs_reserve_metadata_space() and\nspecify how many items we plan on modifying. Then once we\u0027ve done our\nmodifications and such, just call btrfs_unreserve_metadata_space() for\nthe same number of items we reserved.\n\nFor keeping track of metadata needed for data I\u0027ve had to add an extent_io op\nfor when we merge extents. This lets us track space properly when we are doing\nsequential writes, so we don\u0027t end up reserving way more metadata space than\nwhat we need.\n\nThe only place where the metadata space accounting is not done is in the\nrelocation code. This is because Yan is going to be reworking that code in the\nnear future, so running btrfs-vol -b could still possibly result in a ENOSPC\nrelated panic. This patch also turns off the metadata_ratio stuff in order to\nallow users to more efficiently use their disk space.\n\nThis patch makes it so we track how much metadata we need for an inode\u0027s\ndelayed allocation extents by tracking how many extents are currently\nwaiting for allocation. It introduces two new callbacks for the\nextent_io tree\u0027s, merge_extent_hook and split_extent_hook. These help\nus keep track of when we merge delalloc extents together and split them\nup. Reservations are handled prior to any actually dirty\u0027ing occurs,\nand then we unreserve after we dirty.\n\nbtrfs_unreserve_metadata_for_delalloc() will make the appropriate\nunreservations as needed based on the number of reservations we\ncurrently have and the number of extents we currently have. Doing the\nreservation outside of doing any of the actual dirty\u0027ing lets us do\nthings like filemap_flush() the inode to try and force delalloc to\nhappen, or as a last resort actually start allocation on all delalloc\ninodes in the fs. This has survived dbench, fs_mark and an fsx torture\ntest.\n\nSigned-off-by: Josef Bacik \u003cjbacik@redhat.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "f0f37e2f77731b3473fa6bd5ee53255d9a9cdb40", "tree": "3c26d3ed1a453156e9c208ccb5567a8954dba064", "parents": [ "6f5071020d5ec89b5d095aa488db604adb921aec" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Sun Sep 27 22:29:37 2009 +0400" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Sep 27 11:39:25 2009 -0700" }, "message": "const: mark struct vm_struct_operations\n\n* mark struct vm_area_struct::vm_ops as const\n* mark vm_ops in AGP code\n\nBut leave TTM code alone, something is fishy there with global vm_ops\nbeing used.\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "83ebade34bc1a90d0c3f77b87b940f336d075fda", "tree": "99b6366c52e6bec88119ae995399c985fc61e900", "parents": [ "74fca6a42863ffacaf7ba6f1936a9f228950f657", "93c82d575055f1bd0277acae6f966bebafd80dd5" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Sep 11 19:07:25 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Sep 11 19:07:25 2009 -0400" }, "message": "Merge branch \u0027master\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable\n" }, { "commit": "a1ed835e1ab5795f91b198d08c43e2f56848dcf3", "tree": "ac3b370823fa76c5be7698e3663306badbbd622d", "parents": [ "8b62b72b26bcd72082c4a69d179dd906bcc22200" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Sep 11 12:27:37 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Sep 11 13:31:07 2009 -0400" }, "message": "Btrfs: Fix extent replacment race\n\nData COW means that whenever we write to a file, we replace any old\nextent pointers with new ones. There was a window where a readpage\nmight find the old extent pointers on disk and cache them in the\nextent_map tree in ram in the middle of a given write replacing them.\n\nEven though both the readpage and the write had their respective bytes\nin the file locked, the extent readpage inserts may cover more bytes than\nit had locked down.\n\nThis commit closes the race by keeping the new extent pinned in the extent\nmap tree until after the on-disk btree is properly setup with the new\nextent pointers.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "1edbb734b4e010974c41d2859d22a43d04f5f1cf", "tree": "4f43aea677f7206707540dd8622fa4cac099057a", "parents": [ "e48c465bb366c0169f7908bfe62ae7080874ee7d" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Sep 02 13:24:36 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Sep 11 13:31:06 2009 -0400" }, "message": "Btrfs: reduce CPU usage in the extent_state tree\n\nBtrfs is currently mirroring some of the page state bits into\nits extent state tree. The goal behind this was to use it in supporting\nblocksizes other than the page size.\n\nBut, we don\u0027t currently support that, and we\u0027re using quite a lot of CPU\non the rb tree and its spin lock. This commit starts a series of\ncleanups to reduce the amount of work done in the extent state tree as\npart of each IO.\n\nThis commit:\n\n* Adds the ability to lock an extent in the state tree and also set\nother bits. The idea is to do locking and delalloc in one call\n\n* Removes the EXTENT_WRITEBACK and EXTENT_DIRTY bits. Btrfs is using\na combination of the page bits and the ordered write code for this\ninstead.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "890871be854b5f5e43e7ba2475f706209906cc24", "tree": "9d087adf7a28bb910992d07d93ea2a992e394110", "parents": [ "57fd5a5ff8b48b99e90b22fc143082aba755c6c0" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Sep 02 16:24:52 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Sep 11 13:31:05 2009 -0400" }, "message": "Btrfs: switch extent_map to a rw lock\n\nThere are two main users of the extent_map tree. The\nfirst is regular file inodes, where it is evenly spread\nbetween readers and writers.\n\nThe second is the chunk allocation tree, which maps blocks from\nlogical addresses to phyiscal ones, and it is 99.99% reads.\n\nThe mapping tree is a point of lock contention during heavy IO\nworkloads, so this commit switches things to a rw lock.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "40431d6c1288793a682fc6f5e5b5c9d5cac34608", "tree": "a840fb38459476ff0aecda8369f965c344a25562", "parents": [ "9042846bc7ae69cc3288d85af6bad16208d93a95" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Aug 05 12:57:59 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Sep 11 13:31:03 2009 -0400" }, "message": "Btrfs: optimize set extent bit\n\nThe Btrfs set_extent_bit call currently searches the rbtree\nevery time it needs to find more extent_state objects to fill\nthe requested operation.\n\nThis adds a simple test with rb_next to see if the next object\nin the tree was adjacent to the one we just found. If so,\nwe skip the search and just use the next object.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "405f55712dfe464b3240d7816cc4fe4174831be2", "tree": "96c425ea7fa8b31058b8f83a433c5e5265c8ebc7", "parents": [ "f9fabcb58a6d26d6efde842d1703ac7cfa9427b6" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Sat Jul 11 22:08:37 2009 +0400" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Jul 12 12:22:34 2009 -0700" }, "message": "headers: smp_lock.h redux\n\n* Remove smp_lock.h from files which don\u0027t need it (including some headers!)\n* Add smp_lock.h to files which do need it\n* Make smp_lock.h include conditional in hardirq.h\n It\u0027s needed only for one kernel_locked() usage which is under CONFIG_PREEMPT\n\n This will make hardirq.h inclusion cheaper for every PREEMPT\u003dn config\n (which includes allmodconfig/allyesconfig, BTW)\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "f597bb19ccd034cbcf05e1194238e2c8d9505a8a", "tree": "7389f4fab4606b95e4985403f21f0e851ab050ab", "parents": [ "978d910d31c5202e251298bf3f603300a54605dd" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Sat Jun 27 21:06:22 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Jul 02 13:41:16 2009 -0400" }, "message": "Btrfs: don\u0027t log the inode in file_write while growing the file\n" }, { "commit": "524724ed1f224875a117be593540591ed050c73d", "tree": "80f02291dc9f991dfd788d9ec6f4c8ee155997c7", "parents": [ "163e783e6a8b1e8bcb4c9084d438091386b589df" ], "author": { "name": "Hisashi Hifumi", "email": "hifumi.hisashi@oss.ntt.co.jp", "time": "Wed Jun 10 11:13:17 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Jun 10 11:29:53 2009 -0400" }, "message": "Btrfs: fdatasync should skip metadata writeout\n\nIn btrfs, fdatasync and fsync are identical, but\nfdatasync should skip committing transaction when\ninode-\u003ei_state is set just I_DIRTY_SYNC and this indicates\nonly atime or/and mtime updates.\nFollowing patch improves fdatasync throughput.\n\n--file-block-size\u003d4K --file-total-size\u003d16G --file-test-mode\u003drndwr\n--file-fsync-mode\u003dfdatasync run\n\nResults:\n-2.6.30-rc8\nTest execution summary:\n total time: 1980.6540s\n total number of events: 10001\n total time taken by event execution: 1192.9804\n per-request statistics:\n min: 0.0000s\n avg: 0.1193s\n max: 15.3720s\n approx. 95 percentile: 0.7257s\n\nThreads fairness:\n events (avg/stddev): 625.0625/151.32\n execution time (avg/stddev): 74.5613/9.46\n\n-2.6.30-rc8-patched\nTest execution summary:\n total time: 1695.9118s\n total number of events: 10000\n total time taken by event execution: 871.3214\n per-request statistics:\n min: 0.0000s\n avg: 0.0871s\n max: 10.4644s\n approx. 95 percentile: 0.4787s\n\nThreads fairness:\n events (avg/stddev): 625.0000/131.86\n execution time (avg/stddev): 54.4576/8.98\n\nSigned-off-by: Hisashi Hifumi \u003chifumi.hisashi@oss.ntt.co.jp\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "5d4f98a28c7d334091c1b7744f48a1acdd2a4ae0", "tree": "c611d7d824cbcdb777dd2d8e33e2ed1c5df8a9c6", "parents": [ "5c939df56c3ea018b58e5aa76181284c2053d699" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Wed Jun 10 10:45:14 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Jun 10 11:29:46 2009 -0400" }, "message": "Btrfs: Mixed back reference (FORWARD ROLLING FORMAT CHANGE)\n\nThis commit introduces a new kind of back reference for btrfs metadata.\nOnce a filesystem has been mounted with this commit, IT WILL NO LONGER\nBE MOUNTABLE BY OLDER KERNELS.\n\nWhen a tree block in subvolume tree is cow\u0027d, the reference counts of all\nextents it points to are increased by one. At transaction commit time,\nthe old root of the subvolume is recorded in a \"dead root\" data structure,\nand the btree it points to is later walked, dropping reference counts\nand freeing any blocks where the reference count goes to 0.\n\nThe increments done during cow and decrements done after commit cancel out,\nand the walk is a very expensive way to go about freeing the blocks that\nare no longer referenced by the new btree root. This commit reduces the\ntransaction overhead by avoiding the need for dead root records.\n\nWhen a non-shared tree block is cow\u0027d, we free the old block at once, and the\nnew block inherits old block\u0027s references. When a tree block with reference\ncount \u003e 1 is cow\u0027d, we increase the reference counts of all extents\nthe new block points to by one, and decrease the old block\u0027s reference count by\none.\n\nThis dead tree avoidance code removes the need to modify the reference\ncounts of lower level extents when a non-shared tree block is cow\u0027d.\nBut we still need to update back ref for all pointers in the block.\nThis is because the location of the block is recorded in the back ref\nitem.\n\nWe can solve this by introducing a new type of back ref. The new\nback ref provides information about pointer\u0027s key, level and in which\ntree the pointer lives. This information allow us to find the pointer\nby searching the tree. The shortcoming of the new back ref is that it\nonly works for pointers in tree blocks referenced by their owner trees.\n\nThis is mostly a problem for snapshots, where resolving one of these\nfuzzy back references would be O(number_of_snapshots) and quite slow.\nThe solution used here is to use the fuzzy back references in the common\ncase where a given tree block is only referenced by one root,\nand use the full back references when multiple roots have a reference\non a given block.\n\nThis commit adds per subvolume red-black tree to keep trace of cached\ninodes. The red-black tree helps the balancing code to find cached\ninodes whose inode numbers within a given range.\n\nThis commit improves the balancing code by introducing several data\nstructures to keep the state of balancing. The most important one\nis the back ref cache. It caches how the upper level tree blocks are\nreferenced. This greatly reduce the overhead of checking back ref.\n\nThe improved balancing code scales significantly better with a large\nnumber of snapshots.\n\nThis is a very large commit and was written in a number of\npieces. But, they depend heavily on the disk format change and were\nsquashed together to make sure git bisect didn\u0027t end up in a\nbad state wrt space balancing or the format change.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "b7967db75a38df4891b22efe1b0969b9357eb946", "tree": "63ce1e5394446d65111fbc768e44845c295c1049", "parents": [ "d6397baee468809ef311e763dfc6e9f73418f8a6" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Apr 27 07:29:04 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Apr 27 07:40:52 2009 -0400" }, "message": "Btrfs: remove #if 0 code\n\nBtrfs had some old code sitting around under #if 0, this drops it.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "e980b50cda1610f1c17978d9b7fd311a9dd93877", "tree": "a5ab72fa4b791758e25fd6ece6f1aedd29954e7b", "parents": [ "9601e3f6336f6ca66929f451b1f66085e68e36e3" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Apr 24 14:39:24 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Apr 24 15:46:05 2009 -0400" }, "message": "Btrfs: fix fallocate deadlock on inode extent lock\n\nThe btrfs fallocate call takes an extent lock on the entire range\nbeing fallocated, and then runs through insert_reserved_extent on each\nextent as they are allocated.\n\nThe problem with this is that btrfs_drop_extents may decide to try\nand take the same extent lock fallocate was already holding. The solution\nused here is to push down knowledge of the range that is already locked\ngoing into btrfs_drop_extents.\n\nIt turns out that at least one other caller had the same bug.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "546888da82082555a56528730a83f0afd12f33bf", "tree": "98ee868d1b8a4bd390a980fed707f91419b79fb5", "parents": [ "8c594ea81d7abbbffdda447b127f8ba8d76f319d" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Apr 21 11:53:38 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Apr 21 12:45:12 2009 -0400" }, "message": "Btrfs: fix btrfs fallocate oops and deadlock\n\nBtrfs fallocate was incorrectly starting a transaction with a lock held\non the extent_io tree for the file, which could deadlock. Strictly\nspeaking it was using join_transaction which would be safe, but it is better\nto move the transaction outside of the lock.\n\nWhen preallocated extents are overwritten, btrfs_mark_buffer_dirty was\nbeing called on an unlocked buffer. This was triggering an assertion and\noops because the lock is supposed to be held.\n\nThe bug was calling btrfs_mark_buffer_dirty on a leaf after btrfs_del_item had\nbeen run. btrfs_del_item takes care of dirtying things, so the solution is a\nto skip the btrfs_mark_buffer_dirty call in this case.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "d313d7a31a752c88f7288692bd98e66d0789779b", "tree": "e26f332abd22d3bf5a57f09f94ad883d0f0c54c2", "parents": [ "ffbd517d5a8c8e93ddd11046434fb029f3df73aa" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Apr 20 15:50:09 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Apr 20 15:53:08 2009 -0400" }, "message": "Btrfs: add a priority queue to the async thread helpers\n\nBtrfs is using WRITE_SYNC_PLUG to send down synchronous IOs with a\nhigher priority. But, the checksumming helper threads prevent it\nfrom being fully effective.\n\nThere are two problems. First, a big queue of pending checksumming\nwill delay the synchronous IO behind other lower priority writes. Second,\nthe checksumming uses an ordered async work queue. The ordering makes sure\nthat IOs are sent to the block layer in the same order they are sent\nto the checksumming threads. Usually this gives us less seeky IO.\n\nBut, when we start mixing IO priorities, the lower priority IO can delay\nthe higher priority IO.\n\nThis patch solves both problems by adding a high priority list to the async\nhelper threads, and a new btrfs_set_work_high_prio(), which is used\nto make put a new async work item onto the higher priority list.\n\nThe ordering is still done on high priority IO, but all of the high\npriority bios are ordered separately from the low priority bios. This\nordering is purely an IO optimization, it is not involved in data\nor metadata integrity.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "5a3f23d515a2ebf0c750db80579ca57b28cbce6d", "tree": "e0ffb43dd35f1c3def9a74ec7a6f4470902c9761", "parents": [ "1a81af4d1d9c60d4313309f937a1fc5567205a87" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Mar 31 13:27:11 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Mar 31 14:27:58 2009 -0400" }, "message": "Btrfs: add extra flushing for renames and truncates\n\nRenames and truncates are both common ways to replace old data with new\ndata. The filesystem can make an effort to make sure the new data is\non disk before actually replacing the old data.\n\nThis is especially important for rename, which many application use as\nthough it were atomic for both the data and the metadata involved. The\ncurrent btrfs code will happily replace a file that is fully on disk\nwith one that was just created and still has pending IO.\n\nIf we crash after transaction commit but before the IO is done, we\u0027ll end\nup replacing a good file with a zero length file. The solution used\nhere is to create a list of inodes that need special ordering and force\nthem to disk before the commit is done. This is similar to the\next3 style data\u003dordering, except it is only done on selected files.\n\nBtrfs is able to get away with this because it does not wait on commits\nvery often, even for fsync (which use a sub-commit).\n\nFor renames, we order the file when it wasn\u0027t already\non disk and when it is replacing an existing file. Larger files\nare sent to filemap_flush right away (before the transaction handle is\nopened).\n\nFor truncates, we order if the file goes from non-zero size down to\nzero size. This is a little different, because at the time of the\ntruncate the file has no dirty bytes to order. But, we flag the inode\nso that it is added to the ordered list on close (via release method). We\nalso immediately add it to the ordered list of the current transaction\nso that we can try to flush down any writes the application sneaks in\nbefore commit.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "12fcfd22fe5bf4fe74710232098bc101af497995", "tree": "b01ba82147ea76c89149e54d475ed97121387261", "parents": [ "a74ac3220774d33db967088906dc3351829e2d3a" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Mar 24 10:24:20 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Mar 24 16:14:52 2009 -0400" }, "message": "Btrfs: tree logging unlink/rename fixes\n\nThe tree logging code allows individual files or directories to be logged\nwithout including operations on other files and directories in the FS.\nIt tries to commit the minimal set of changes to disk in order to\nfsync the single file or directory that was sent to fsync or O_SYNC.\n\nThe tree logging code was allowing files and directories to be unlinked\nif they were part of a rename operation where only one directory\nin the rename was in the fsync log. This patch adds a few new rules\nto the tree logging.\n\n1) on rename or unlink, if the inode being unlinked isn\u0027t in the fsync\nlog, we must force a full commit before doing an fsync of the directory\nwhere the unlink was done. The commit isn\u0027t done during the unlink,\nbut it is forced the next time we try to log the parent directory.\n\nSolution: record transid of last unlink/rename per directory when the\ndirectory wasn\u0027t already logged. For renames this is only done when\nrenaming to a different directory.\n\nmkdir foo/some_dir\nnormal commit\nrename foo/some_dir foo2/some_dir\nmkdir foo/some_dir\nfsync foo/some_dir/some_file\n\nThe fsync above will unlink the original some_dir without recording\nit in its new location (foo2). After a crash, some_dir will be gone\nunless the fsync of some_file forces a full commit\n\n2) we must log any new names for any file or dir that is in the fsync\nlog. This way we make sure not to lose files that are unlinked during\nthe same transaction.\n\n2a) we must log any new names for any file or dir during rename\nwhen the directory they are being removed from was logged.\n\n2a is actually the more important variant. Without the extra logging\na crash might unlink the old name without recreating the new one\n\n3) after a crash, we must go through any directories with a link count\nof zero and redo the rm -rf\n\nmkdir f1/foo\nnormal commit\nrm -rf f1/foo\nfsync(f1)\n\nThe directory f1 was fully removed from the FS, but fsync was never\ncalled on f1, only its parent dir. After a crash the rm -rf must\nbe replayed. This must be able to recurse down the entire\ndirectory tree. The inode link count fixup code takes care of the\nugly details.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "b9473439d3e84d9fc1a0a83faca69cc1b7566341", "tree": "bef8321b80589026b617d61d0fabaf545d459269", "parents": [ "89573b9c516b24af8a3b9958dd5afca8fa874e3d" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Mar 13 11:00:37 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Mar 24 16:14:28 2009 -0400" }, "message": "Btrfs: leave btree locks spinning more often\n\nbtrfs_mark_buffer dirty would set dirty bits in the extent_io tree\nfor the buffers it was dirtying. This may require a kmalloc and it\nwas not atomic. So, anyone who called btrfs_mark_buffer_dirty had to\nset any btree locks they were holding to blocking first.\n\nThis commit changes dirty tracking for extent buffers to just use a flag\nin the extent buffer. Now that we have one and only one extent buffer\nper page, this can be safely done without losing dirty bits along the way.\n\nThis also introduces a path-\u003eleave_spinning flag that callers of\nbtrfs_search_slot can use to indicate they will properly deal with a\npath returned where all the locks are spinning instead of blocking.\n\nMany of the btree search callers now expect spinning paths,\nresulting in better btree concurrency overall.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "56bec294dea971335d4466b30f2d959f28f6e36d", "tree": "fc0b5bbf4bb6ab35582a4c7f58f5ac88f71c38bf", "parents": [ "9fa8cfe706f9c20067c042a064999d5825a35330" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Mar 13 10:10:06 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Mar 24 16:14:25 2009 -0400" }, "message": "Btrfs: do extent allocation and reference count updates in the background\n\nThe extent allocation tree maintains a reference count and full\nback reference information for every extent allocated in the\nfilesystem. For subvolume and snapshot trees, every time\na block goes through COW, the new copy of the block adds a reference\non every block it points to.\n\nIf a btree node points to 150 leaves, then the COW code needs to go\nand add backrefs on 150 different extents, which might be spread all\nover the extent allocation tree.\n\nThese updates currently happen during btrfs_cow_block, and most COWs\nhappen during btrfs_search_slot. btrfs_search_slot has locks held\non both the parent and the node we are COWing, and so we really want\nto avoid IO during the COW if we can.\n\nThis commit adds an rbtree of pending reference count updates and extent\nallocations. The tree is ordered by byte number of the extent and byte number\nof the parent for the back reference. The tree allows us to:\n\n1) Modify back references in something close to disk order, reducing seeks\n2) Significantly reduce the number of modifications made as block pointers\nare balanced around\n3) Do all of the extent insertion and back reference modifications outside\nof the performance critical btrfs_search_slot code.\n\n#3 has the added benefit of greatly reducing the btrfs stack footprint.\nThe extent allocation tree modifications are done without the deep\n(and somewhat recursive) call chains used in the past.\n\nThese delayed back reference updates must be done before the transaction\ncommits, and so the rbtree is tied to the transaction. Throttling is\nimplemented to help keep the queue of backrefs at a reasonable size.\n\nSince there was a similar mechanism in place for the extent tree\nextents, that is removed and replaced by the delayed reference tree.\n\nYan Zheng \u003cyan.zheng@oracle.com\u003e helped review and fixup this code.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "6a63209fc02d5483371f07e4913ee8abad608051", "tree": "7595e0df452928b677b66a64baf0cb3b7ec53dfc", "parents": [ "2cfbd50b536c878e58ab3681c4e944fa3d99b415" ], "author": { "name": "Josef Bacik", "email": "jbacik@redhat.com", "time": "Fri Feb 20 11:00:09 2009 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Feb 20 11:00:09 2009 -0500" }, "message": "Btrfs: add better -ENOSPC handling\n\nThis is a step in the direction of better -ENOSPC handling. Instead of\nchecking the global bytes counter we check the space_info bytes counters to\nmake sure we have enough space.\n\nIf we don\u0027t we go ahead and try to allocate a new chunk, and then if that fails\nwe return -ENOSPC. This patch adds two counters to btrfs_space_info,\nbytes_delalloc and bytes_may_use.\n\nbytes_delalloc account for extents we\u0027ve actually setup for delalloc and will\nbe allocated at some point down the line. \n\nbytes_may_use is to keep track of how many bytes we may use for delalloc at\nsome point. When we actually set the extent_bit for the delalloc bytes we\nsubtract the reserved bytes from the bytes_may_use counter. This keeps us from\nnot actually being able to allocate space for any delalloc bytes.\n\nSigned-off-by: Josef Bacik \u003cjbacik@redhat.com\u003e\n\n\n\n\n" }, { "commit": "2cfbd50b536c878e58ab3681c4e944fa3d99b415", "tree": "af29d7c8a094b0560c3ed04aebacdea23ae1177f", "parents": [ "2456242530a21cfee82646ebeeda65d3f74faa4c" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Feb 20 10:55:10 2009 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Feb 20 10:55:10 2009 -0500" }, "message": "Btrfs: check file pointer in btrfs_sync_file\n\nfsync can be called by NFS with a null file pointer, and btrfs was\noopsing in this case.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "7237f1833601dcc435a64176c2c347ec4bd959f9", "tree": "5e12b9a7655f03181605e02fd91b42e68ee92c2e", "parents": [ "7e6628544abad773222d8b177f738ac2db1859de" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Wed Jan 21 12:54:03 2009 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Jan 21 12:54:03 2009 -0500" }, "message": "Btrfs: fix tree logs parallel sync\n\nTo improve performance, btrfs_sync_log merges tree log sync\nrequests. But it wrongly merges sync requests for different\ntree logs. If multiple tree logs are synced at the same time,\nonly one of them actually gets synced.\n\nThis patch has following changes to fix the bug:\n\nMove most tree log related fields in btrfs_fs_info to\nbtrfs_root. This allows merging sync requests separately\nfor each tree log.\n\nDon\u0027t insert root item into the log root tree immediately\nafter log tree is allocated. Root item for log tree is\ninserted when log tree get synced for the first time. This\nallows syncing the log root tree without first syncing all\nlog trees.\n\nAt tree-log sync, btrfs_sync_log first sync the log tree;\nthen updates corresponding root item in the log root tree;\nsync the log root tree; then update the super block.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "7eaebe7d503c3ef240ac7b3efc5433fe647c0298", "tree": "6e54b7766559555d3a4e205a0524a4df02f6cf5b", "parents": [ "070604040b86511cc2df0f25f98e26c5529bd928" ], "author": { "name": "Huang Weiyi", "email": "weiyi.huang@gmail.com", "time": "Wed Jan 21 10:49:16 2009 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Jan 21 10:49:16 2009 -0500" }, "message": "Btrfs: removed unused #include \u003cversion.h\u003e\u0027s\n\nRemoved unused #include \u003cversion.h\u003e\u0027s in btrfs\n\nSigned-off-by: Huang Weiyi \u003cweiyi.huang@gmail.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" }, { "commit": "1ba12553f3600ffebad226c5204ab0e46df98161", "tree": "081d39d935782a34d4726a55f608de3237b57d9d", "parents": [ "180591bcfed1a2cec048abb21d3dab840625caab" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Tue Jan 06 09:58:02 2009 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Jan 06 09:58:02 2009 -0500" }, "message": "Btrfs: don\u0027t change file extent\u0027s ram_bytes in btrfs_drop_extents\n\nbtrfs_drop_extents doesn\u0027t change file extent\u0027s ram_bytes\nin the case of booked extent. To be consistent, we should\nalso not change ram_bytes when truncating existing extent.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "d397712bcc6a759a560fd247e6053ecae091f958", "tree": "9da8daebb870d8b8b1843507c4621715e23dd31a", "parents": [ "1f3c79a28c8837e8572b98f6d14142d9a6133c56" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Jan 05 21:25:51 2009 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Jan 05 21:25:51 2009 -0500" }, "message": "Btrfs: Fix checkpatch.pl warnings\n\nThere were many, most are fixed now. struct-funcs.c generates some warnings\nbut these are bogus.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "9aead43588f4bdb1bb61e348ad0f33794bbddc0f", "tree": "294c6333192d15cbf7ff8323920e8bc99e70f91c", "parents": [ "52c2617990fed072220708d6b771dc10f37547b0" ], "author": { "name": "yanhai zhu", "email": "zhu.yanhai@gmail.com", "time": "Mon Jan 05 15:49:11 2009 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Jan 05 15:49:11 2009 -0500" }, "message": "Btrfs: Fix memset length in btrfs_file_write\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" }, { "commit": "17d217fe970d34720f4f1633dca73a6aa2f3d9d1", "tree": "4e2e716400cc45a6697475629f4c046b96ff76e7", "parents": [ "e4404d6e8da678d852b7f767f665f8edf76c9e9f" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Fri Dec 12 10:03:38 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Dec 12 10:03:38 2008 -0500" }, "message": "Btrfs: fix nodatasum handling in balancing code\n\nChecksums on data can be disabled by mount option, so it\u0027s\npossible some data extents don\u0027t have checksums or have\ninvalid checksums. This causes trouble for data relocation.\nThis patch contains following things to make data relocation\nwork.\n\n1) make nodatasum/nodatacow mount option only affects new\nfiles. Checksums and COW on data are only controlled by the\ninode flags.\n\n2) check the existence of checksum in the nodatacow checker.\nIf checksums exist, force COW the data extent. This ensure that\nchecksum for a given block is either valid or does not exist.\n\n3) update data relocation code to properly handle the case\nof checksum missing.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "580afd76e451deb6772d0507de580fb1df14da6c", "tree": "ea112be78807b07f617efffefb532e19778dc9bb", "parents": [ "c3027eb5523d6983f12628f3fe13d8a7576db701" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Dec 08 19:15:39 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Dec 08 19:15:39 2008 -0500" }, "message": "Btrfs: Fix compressed checksum fsync log copies\n\nThe fsync logging code makes sure to onl copy the relevant checksum for each\nextent based on the file extent pointers it finds.\n\nBut for compressed extents, it needs to copy the checksum for the\nentire extent.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" }, { "commit": "c3027eb5523d6983f12628f3fe13d8a7576db701", "tree": "6a912094818ff261667228a4f6d83ecc4513ac43", "parents": [ "934d375bacf9ea8a37fbfff5f3cf1c093f324095" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Dec 08 16:40:21 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Dec 08 16:40:21 2008 -0500" }, "message": "Btrfs: Add inode sequence number for NFS and reserved space in a few structs\n\nThis adds a sequence number to the btrfs inode that is increased on\nevery update. NFS will be able to use that to detect when an inode has\nchanged, without relying on inaccurate time fields.\n\nWhile we\u0027re here, this also:\n\nPuts reserved space into the super block and inode\n\nAdds a log root transid to the super so we can pick the newest super\nbased on the fsync log as well as the main transaction ID. For now\nthe log root transid is always zero, but that\u0027ll get fixed.\n\nAdds a starting offset to the dev_item. This will let us do better\nalignment calculations if we know the start of a partition on the disk.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "6e430f94e508fee1aefd1dfec88da3c24ce64433", "tree": "a93d163dbd42a16750f4ecbf4a333d8ea6ec1c0d", "parents": [ "b2950863c61bc24cf0f63bc05947d9d50663c4c0" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Tue Dec 02 06:36:09 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Dec 02 06:36:09 2008 -0500" }, "message": "Btrfs: fix shadowed variable declarations\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" }, { "commit": "c36047d729a3fa080dd194b20b684cc9fe73e90c", "tree": "ac1ac2a3a5e3b9ecb1caf29fde32c00959006ec3", "parents": [ "2b82032c34ec40515d3c45c36cd1961f37977de8" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Wed Nov 12 14:19:50 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Nov 12 14:19:50 2008 -0500" }, "message": "Btrfs: Fix race in btrfs_mark_extent_written\n\nWhen extent needs to be split, btrfs_mark_extent_written truncates the extent\nfirst, then inserts a new extent and increases the reference count.\n\nThe race happens if someone else deletes the old extent before the new extent\nis inserted. The fix here is increase the reference count in advance. This race\nis similar to the race in btrfs_drop_extents that was recently fixed.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "8247b41ac980d125de8aeba6f33f381056ac0ecb", "tree": "40b8ddab6be8ec6766007b22db9a6b898ff1a960", "parents": [ "8a1413a296d38b54ded651e76ef16c033d38fd5d" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Tue Nov 11 09:33:29 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Nov 11 09:33:29 2008 -0500" }, "message": "Btrfs: Fix starting search offset inside btrfs_drop_extents\n\nbtrfs_drop_extents will drop paths and search again when it needs to\nforce COW of higher nodes. It was using the key it found during the last\nsearch as the offset for the next search.\n\nBut, this wasn\u0027t always correct. The key could be from before our desired\nrange, and because we\u0027re dropping the path, it is possible for file\u0027s items\nto change while we do the search again.\n\nThe fix here is to make sure we don\u0027t search for something smaller than\nthe offset btrfs_drop_extents was called with.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" }, { "commit": "445a69449994a37615cd47e47bcab2e42a070adf", "tree": "eb41f8246fe64bd32c1bb9ee544b1b27866ec79b", "parents": [ "39be25cd89450940b0e5f8a6aad71d1ec99b17bf" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Nov 10 11:53:33 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Nov 10 11:53:33 2008 -0500" }, "message": "Btrfs: Fix usage of struct extent_map-\u003eorig_start\n\nThis makes sure the orig_start field in struct extent_map gets set\neverywhere the extent_map structs are created or modified.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "ff5b7ee33d82414bf4baf299c21fb703bcc89629", "tree": "926786cf57b375e5ef1f865427c910c3d4bdfc7a", "parents": [ "f2b1c41cf94d7f839fe9ede5f3ead92698a93fb3" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Mon Nov 10 07:34:43 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Nov 10 07:34:43 2008 -0500" }, "message": "Btrfs: Fix csum error for compressed data\n\nThe decompress code doesn\u0027t take the logical offset in extent\npointer into account. If the logical offset isn\u0027t zero, data\nwill be decompressed into wrong pages.\n\nThe solution used here is to record the starting offset of the extent\nin the file separately from the logical start of the extent_map struct.\nThis allows us to avoid problems inserting overlapping extents.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "771ed689d2cd53439e28e095bc38fbe40a71429e", "tree": "518801f7141928e398d40c2b5955720d4346ce1a", "parents": [ "4a69a41009c4ac691f7d9c289f5f37fabeddce46" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Nov 06 22:02:51 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Nov 06 22:02:51 2008 -0500" }, "message": "Btrfs: Optimize compressed writeback and reads\n\nWhen reading compressed extents, try to put pages into the page cache\nfor any pages covered by the compressed extent that readpages didn\u0027t already\npreload.\n\nAdd an async work queue to handle transformations at delayed allocation processing\ntime. Right now this is just compression. The workflow is:\n\n1) Find offsets in the file marked for delayed allocation\n2) Lock the pages\n3) Lock the state bits\n4) Call the async delalloc code\n\nThe async delalloc code clears the state lock bits and delalloc bits. It is\nimportant this happens before the range goes into the work queue because\notherwise it might deadlock with other work queue items that try to lock\nthose extent bits.\n\nThe file pages are compressed, and if the compression doesn\u0027t work the\npages are written back directly.\n\nAn ordered work queue is used to make sure the inodes are written in the same\norder that pdflush or writepages sent them down.\n\nThis changes extent_write_cache_pages to let the writepage function\nupdate the wbc nr_written count.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" }, { "commit": "70b99e6959a4c28ae1b314985eca731f3db72f1d", "tree": "81578759fe422f7b17a734b8bf16b042aa02a046", "parents": [ "d899e05215178fed903ad0e7fc1cb4d8e0cc0a88" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Oct 31 12:46:39 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Oct 31 12:46:39 2008 -0400" }, "message": "Btrfs: Compression corner fixes\n\nMake sure we keep page-\u003emapping NULL on the pages we\u0027re getting\nvia alloc_page. It gets set so a few of the callbacks can do the right\nthing, but in general these pages don\u0027t have a mapping.\n\nDon\u0027t try to truncate compressed inline items in btrfs_drop_extents.\nThe whole compressed item must be preserved.\n\nDon\u0027t try to create multipage inline compressed items. When we try to\noverwrite just the first page of the file, we would have to read in and recow\nall the pages after it in the same compressed inline items. For now, only\ncreate single page inline items.\n\nMake sure we lock pages in the correct order during delalloc. The\nsearch into the state tree for delalloc bytes can return bytes before\nthe page we already have locked.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" }, { "commit": "d899e05215178fed903ad0e7fc1cb4d8e0cc0a88", "tree": "2969e3558f5c50ec0f9ac4201099c0d5d1d6e2c2", "parents": [ "80ff385665b7fca29fefe358a60ab0d09f9b8e87" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Thu Oct 30 14:25:28 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Oct 30 14:25:28 2008 -0400" }, "message": "Btrfs: Add fallocate support v2\nThis patch updates btrfs-progs for fallocate support.\n\nfallocate is a little different in Btrfs because we need to tell the\nCOW system that a given preallocated extent doesn\u0027t need to be\ncow\u0027d as long as there are no snapshots of it. This leverages the\n-o nodatacow checks.\n \nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "6643558db29006825dbb10012b3f8890aca4bcd5", "tree": "0c0f4f7a0011749cda998431828cb9161747b51a", "parents": [ "9036c10208e1fc496cef7692ba66a78699b360dc" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Thu Oct 30 14:19:50 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Oct 30 14:19:50 2008 -0400" }, "message": "Btrfs: Fix bookend extent race v2\n\nWhen dropping middle part of an extent, btrfs_drop_extents truncates\nthe extent at first, then inserts a bookend extent.\n\nSince truncation and insertion can\u0027t be done atomically, there is a small\nperiod that the bookend extent isn\u0027t in the tree. This causes problem for\nfunctions that search the tree for file extent item. The way to fix this is\nlock the range of the bookend extent before truncation.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "9036c10208e1fc496cef7692ba66a78699b360dc", "tree": "a5b272158acc0e01e71731f5ccbc895a8eee1151", "parents": [ "19b9bdb054895ba07086f0264641c9f80e0eb2c4" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Thu Oct 30 14:19:41 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Oct 30 14:19:41 2008 -0400" }, "message": "Btrfs: update hole handling v2\n\nThis patch splits the hole insertion code out of btrfs_setattr\ninto btrfs_cont_expand and updates btrfs_get_extent to properly\nhandle the case that file extent items are not continuous.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "c8b978188c9a0fd3d535c13debd19d522b726f1f", "tree": "873628723fb82fe2a7c77adc65fa93eca1d61c0c", "parents": [ "26ce34a9c47334ff7984769e4661b2f1883594ff" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Oct 29 14:49:59 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Oct 29 14:49:59 2008 -0400" }, "message": "Btrfs: Add zlib compression support\n\nThis is a large change for adding compression on reading and writing,\nboth for inline and regular extents. It does some fairly large\nsurgery to the writeback paths.\n\nCompression is off by default and enabled by mount -o compress. Even\nwhen the -o compress mount option is not used, it is possible to read\ncompressed extents off the disk.\n\nIf compression for a given set of pages fails to make them smaller, the\nfile is flagged to avoid future compression attempts later.\n\n* While finding delalloc extents, the pages are locked before being sent down\nto the delalloc handler. This allows the delalloc handler to do complex things\nsuch as cleaning the pages, marking them writeback and starting IO on their\nbehalf.\n\n* Inline extents are inserted at delalloc time now. This allows us to compress\nthe data before inserting the inline extent, and it allows us to insert\nan inline extent that spans multiple pages.\n\n* All of the in-memory extent representations (extent_map.c, ordered-data.c etc)\nare changed to record both an in-memory size and an on disk size, as well\nas a flag for compression.\n\nFrom a disk format point of view, the extent pointers in the file are changed\nto record the on disk size of a given extent and some encoding flags.\nSpace in the disk format is allocated for compression encoding, as well\nas encryption and a generic \u0027other\u0027 field. Neither the encryption or the\n\u0027other\u0027 field are currently used.\n\nIn order to limit the amount of data read for a single random read in the\nfile, the size of a compressed extent is limited to 128k. This is a\nsoftware only limit, the disk format supports u64 sized compressed extents.\n\nIn order to limit the ram consumed while processing extents, the uncompressed\nsize of a compressed extent is limited to 256k. This is a software only limit\nand will be subject to tuning later.\n\nChecksumming is still done on compressed extents, and it is done on the\nuncompressed version of the data. This way additional encodings can be\nlayered on without having to figure out which encoding to checksum.\n\nCompression happens at delalloc time, which is basically singled threaded because\nit is usually done by a single pdflush thread. This makes it tricky to\nspread the compression load across all the cpus on the box. We\u0027ll have to\nlook at parallel pdflush walks of dirty inodes at a later time.\n\nDecompression is hooked into readpages and it does spread across CPUs nicely.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "3bb1a1bc42f2ae9582c28adf620484efcd4da38d", "tree": "4e65ee859e73ea9558e33a02ba10e1d9d54756f3", "parents": [ "a76a3cd40c1127ca199d4f7f37bf0d541bf44eb2" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Thu Oct 09 11:46:24 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Oct 09 11:46:24 2008 -0400" }, "message": "Btrfs: Remove offset field from struct btrfs_extent_ref\n\nThe offset field in struct btrfs_extent_ref records the position\ninside file that file extent is referenced by. In the new back\nreference system, tree leaves holding references to file extent\nare recorded explicitly. We can scan these tree leaves very quickly, so the\noffset field is not required.\n\nThis patch also makes the back reference system check the objectid\nwhen extents are in deleting.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "a76a3cd40c1127ca199d4f7f37bf0d541bf44eb2", "tree": "a91e91d9f67ce8bd314cebdacc458315d3e54275", "parents": [ "a62b940160d8125016e85046e68ae621c99e751f" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Thu Oct 09 11:46:29 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Oct 09 11:46:29 2008 -0400" }, "message": "Btrfs: Count space allocated to file in bytes\n\nThis patch makes btrfs count space allocated to file in bytes instead\nof 512 byte sectors.\n\nEverything else in btrfs uses a byte count instead of sector sizes or\nblocks sizes, so this fits better.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "cb843a6f513a1a91c54951005e60bd9b95bdf973", "tree": "12edfb1154691f1a8aaeeadb97899397574aa785", "parents": [ "323ac95bce442bbde514e3ce57e840402f80d909" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Oct 03 12:30:02 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Oct 03 12:30:02 2008 -0400" }, "message": "Btrfs: O_DIRECT writes via buffered writes + invaldiate\n\nThis reworks the btrfs O_DIRECT write code a bit. It had always fallen\nback to buffered IO and done an invalidate, but needed to be updated\nfor the data\u003dordered code. The invalidate wasn\u0027t actually removing pages\nbecause they were still inside an ordered extent.\n\nThis also combines the O_DIRECT/O_SYNC paths where possible, and kicks\noff IO in the main btrfs_file_write loop to keep the pipe down the the\ndisk full as we process long writes.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "d352ac68148b69937d39ca5d48bcc4478e118dbf", "tree": "7951dd7311999d9e77766acdc7f8e93de97874d8", "parents": [ "9a5e1ea1e1e539e244a54afffc330fc368376ab9" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Sep 29 15:18:18 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Sep 29 15:18:18 2008 -0400" }, "message": "Btrfs: add and improve comments\n\nThis improves the comments at the top of many functions. It didn\u0027t\ndive into the guts of functions because I was trying to\navoid merging problems with the new allocator and back reference work.\n\nextent-tree.c and volumes.c were both skipped, and there is definitely\nmore work todo in cleaning and commenting the code.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "5b21f2ed3f2947b5195b65c9fdbdd9e52904cc03", "tree": "9af8f539ac487c163f3207bc065767c3c8b37ae7", "parents": [ "e465768938f95388723b0fd3c50a0ae48173edb9" ], "author": { "name": "Zheng Yan", "email": "zheng.yan@oracle.com", "time": "Fri Sep 26 10:05:38 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Sep 26 10:05:38 2008 -0400" }, "message": "Btrfs: extent_map and data\u003dordered fixes for space balancing\n\n* Add an EXTENT_BOUNDARY state bit to keep the writepage code\nfrom merging data extents that are in the process of being\nrelocated. This allows us to do accounting for them properly.\n\n* The balancing code relocates data extents indepdent of the underlying\ninode. The extent_map code was modified to properly account for\nthings moving around (invalidating extent_map caches in the inode).\n\n* Don\u0027t take the drop_mutex in the create_subvol ioctl. It isn\u0027t\nrequired.\n\n* Fix walking of the ordered extent list to avoid races with sys_unlink\n\n* Change the lock ordering rules. Transaction start goes outside\nthe drop_mutex. This allows btrfs_commit_transaction to directly\ndrop the relocation trees.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "2b1f55b0f0d0d1a66470ef4ea2696cd5dd741a12", "tree": "980019fac9b0891e682bc7d9a8c8a58284b467fc", "parents": [ "9b49c9b9f93e148815f2544d0c91f43b6d72eea9" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Sep 24 11:48:04 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 15:41:59 2008 -0400" }, "message": "Remove Btrfs compat code for older kernels\n\nBtrfs had compatibility code for kernels back to 2.6.18. These have\nbeen removed, and will be maintained in a separate backport\ngit tree from now on.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "31840ae1a6b433ca0e6a8d341756ff478bbf959e", "tree": "9343db596aec175e9640aa2800b80f01496d7047", "parents": [ "1c2308f8e7d8491467e0095af2b01500f1b70819" ], "author": { "name": "Zheng Yan", "email": "zheng.yan@oracle.com", "time": "Tue Sep 23 13:14:14 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:07 2008 -0400" }, "message": "Btrfs: Full back reference support\n\nThis patch makes the back reference system to explicit record the\nlocation of parent node for all types of extents. The location of\nparent node is placed into the offset field of backref key. Every\ntime a tree block is balanced, the back references for the affected\nlower level extents are updated.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "49eb7e46d47ea72a9bd2a5f8cedb04f5159cc277", "tree": "c3d05588c3cf73453673206214fadedc07bd79d7", "parents": [ "98509cfc5a6857bddcfe4b19a9539726655ec9bd" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 11 15:53:12 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:07 2008 -0400" }, "message": "Btrfs: Dir fsync optimizations\n\nDrop i_mutex during the commit\n\nDon\u0027t bother doing the fsync at all unless the dir is marked as dirtied\nand needing fsync in this transaction. For directories, this means\nthat someone has unlinked a file from the dir without fsyncing the\nfile.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "e02119d5a7b4396c5a872582fddc8bd6d305a70a", "tree": "825efe2a79dbca8d61256183f3526a5b5dc40dc6", "parents": [ "a1b32a5932cfac7c38b442582285f3da2a09dfd8" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Sep 05 16:13:11 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:07 2008 -0400" }, "message": "Btrfs: Add a write ahead tree log to optimize synchronous operations\n\nFile syncs and directory syncs are optimized by copying their\nitems into a special (copy-on-write) log tree. There is one log tree per\nsubvolume and the btrfs super block points to a tree of log tree roots.\n\nAfter a crash, items are copied out of the log tree and back into the\nsubvolume. See tree-log.c for all the details.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "a1b32a5932cfac7c38b442582285f3da2a09dfd8", "tree": "d468c51c7391ee1a0cfcc6ff1e76e11c01646efe", "parents": [ "95819c05732c511338b43c115ffbcee978c02888" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Sep 05 16:09:51 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:07 2008 -0400" }, "message": "Btrfs: Add debugging checks to track down corrupted metadata\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "ea8c281947950fac5f78818b767821d696c9512a", "tree": "a30e9da5371d9a694a8f73d450231107ccad1dcb", "parents": [ "d7a029a89ef370e74b63f18b81498d90d1ee3cc1" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Aug 04 23:17:27 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:06 2008 -0400" }, "message": "Btrfs: Maintain a list of inodes that are delalloc and a way to wait on them\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "f87f057b49ee52cf5c627ab27a706e3252767c9f", "tree": "4f8cc04e91ae836f4dd1b2151f47cbd1bd1b9367", "parents": [ "492bb6deee3416ad792dcd8584ebd95c463af1a6" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Aug 01 11:27:23 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:06 2008 -0400" }, "message": "Btrfs: Improve and cleanup locking done by walk_down_tree\n\nWhile dropping snapshots, walk_down_tree does most of the work of checking\nreference counts and limiting tree traversal to just the blocks that\nwe are freeing.\n\nIt dropped and held the allocation mutex in strange and confusing ways,\nthis commit changes it to only hold the mutex while actually freeing a block.\n\nThe rest of the checks around reference counts should be safe without the lock\nbecause we only allow one process in btrfs_drop_snapshot at a time. Other\nprocesses dropping reference counts should not drop it to 1 because\ntheir tree roots already have an extra ref on the block.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "3ce7e67a069b919be774a341b82fc20978b7f69d", "tree": "c1f346ab7c61f51a4de0328ba0890be68038ad50", "parents": [ "61b4944018449003ac5f9757f4d125dce519cf51" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Jul 31 15:42:54 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:05 2008 -0400" }, "message": "Btrfs: Drop some debugging around the extent_map pinned flag\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "37d1aeee3990385e9bb436c50c2f7e120a668df6", "tree": "6fc0e7beba7161e0400e743b31030b8cbbe29885", "parents": [ "47ac14fa0f5306c6b97203f4f086bf1fa21dfddb" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Jul 31 10:48:37 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:05 2008 -0400" }, "message": "Btrfs: Throttle tuning\n\nThis avoids waiting for transactions with pages locked by breaking out\nthe code to wait for the current transaction to close into a function\ncalled by btrfs_throttle.\n\nIt also lowers the limits for where we start throttling.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "0ee0fda06b943d7ef65f3cec50ab9d427a2baf97", "tree": "342ac5337dc72cf18b683f7f79b497db98a6062e", "parents": [ "bcc63abbf3e9bf948a1b0129b3e6120ec7d7f698" ], "author": { "name": "Sven Wegener", "email": "sven.wegener@stealer.net", "time": "Wed Jul 30 16:54:26 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:05 2008 -0400" }, "message": "Btrfs: Add compatibility for kernels \u003e\u003d 2.6.27-rc1\n\nAdd a couple of #if\u0027s to follow API changes.\n\nSigned-off-by: Sven Wegener \u003csven.wegener@stealer.net\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "bcc63abbf3e9bf948a1b0129b3e6120ec7d7f698", "tree": "1c66dc210f948f79c86786368d2c75b57482875d", "parents": [ "33958dc6d38fb4ca7e62273855fcb2db7e616263" ], "author": { "name": "Yan", "email": "zheng.yan@oracle.com", "time": "Wed Jul 30 16:29:20 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:05 2008 -0400" }, "message": "Btrfs: implement memory reclaim for leaf reference cache\n\nThe memory reclaiming issue happens when snapshot exists. In that\ncase, some cache entries may not be used during old snapshot dropping,\nso they will remain in the cache until umount.\n\nThe patch adds a field to struct btrfs_leaf_ref to record create time. Besides,\nthe patch makes all dead roots of a given snapshot linked together in order of\ncreate time. After a old snapshot was completely dropped, we check the dead\nroot list and remove all cache entries created before the oldest dead root in\nthe list.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "ab78c84de1ce4db1b2a2cef361625ad80abbab3f", "tree": "a9726645832b50da1da9a9690c4200c0f198ce7d", "parents": [ "1a3f5d0400d786aec41ede15fec5710ad1a1d18b" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Jul 29 16:15:18 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:05 2008 -0400" }, "message": "Btrfs: Throttle operations if the reference cache gets too large\n\nA large reference cache is directly related to a lot of work pending\nfor the cleaner thread. This throttles back new operations based on\nthe size of the reference cache so the cleaner thread will be able to keep\nup.\n\nOverall, this actually makes the FS faster because the cleaner thread will\nbe more likely to find things in cache.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "017e5369eb353559d68a11d4a718faa634533821", "tree": "c339f2f4a59e403c7f9bfa8d137663c6bf260537", "parents": [ "31153d81284934601d08110ac7698fd9a535e4c0" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Jul 28 15:32:51 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:05 2008 -0400" }, "message": "Btrfs: Leaf reference cache update\n\nThis changes the reference cache to make a single cache per root\ninstead of one cache per transaction, and to key by the byte number\nof the disk block instead of the keys inside.\n\nThis makes it much less likely to have cache misses if a snapshot\nor something has an extra reference on a higher node or a leaf while\nthe first transaction that added the leaf into the cache is dropping.\n\nSome throttling is added to functions that free blocks heavily so they\nwait for old transactions to drop.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "f421950f86bf96a11fef932e167ab2e70d4c43a0", "tree": "a2b62b942b023e37b6aae39891c2b314d8d8a3fb", "parents": [ "a61e6f29dc7c9d56a776a518eed92bbc61848263" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Jul 22 11:18:09 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:05 2008 -0400" }, "message": "Btrfs: Fix some data\u003dordered related data corruptions\n\nStress testing was showing data checksum errors, most of which were caused\nby a lookup bug in the extent_map tree. The tree was caching the last\npointer returned, and searches would check the last pointer first.\n\nBut, search callers also expect the search to return the very first\nmatching extent in the range, which wasn\u0027t always true with the last\npointer usage.\n\nFor now, the code to cache the last return value is just removed. It is\neasy to fix, but I think lookups are rare enough that it isn\u0027t required anymore.\n\nThis commit also replaces do_sync_mapping_range with a local copy of the\nrelated functions.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "4a09675279674041862d2210635b0cc1f60be28e", "tree": "19e4736c062f87729dcdc1bd57f4919b3227ec32", "parents": [ "e5a2217ef6ff088d08a27208929a6f9c635d672c" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Jul 21 10:29:44 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:05 2008 -0400" }, "message": "Btrfs: Data ordered fixes\n\n* In btrfs_delete_inode, wait for ordered extents after calling\ntruncate_inode_pages. This is much faster, and more correct\n\n* Properly clear our the PageChecked bit everywhere we redirty the page.\n\n* Change the writepage fixup handler to lock the page range and check to\nsee if an ordered extent had been inserted since the improperly dirtied\npage was discovered\n\n* Wait for ordered extents outside the transaction. This isn\u0027t required\nfor locking rules but does improve transaction latencies\n\n* Reduce contention on the alloc_mutex by dropping it while incrementing\nrefs on a node/leaf and while dropping refs on a leaf.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "7f3c74fb831fa19bafe087e817c0a5ff3883f1ea", "tree": "416e95db10e408240916d5061caf1e5d1182b330", "parents": [ "211f90e68b679d27fe23c5505f86d6ce62c98bae" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Jul 18 12:01:11 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:05 2008 -0400" }, "message": "Btrfs: Keep extent mappings in ram until pending ordered extents are done\n\nIt was possible for stale mappings from disk to be used instead of the\nnew pending ordered extent. This adds a flag to the extent map struct\nto keep it pinned until the pending ordered extent is actually on disk.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "ee6e6504e147a59a9f4d582662c105e9d72ae638", "tree": "be932cc04abb860ed76ab8d4c4c28353ed50bebb", "parents": [ "ba1da2f442ec91a1534afa893f9bef7e33056ace" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Jul 17 12:54:40 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:04 2008 -0400" }, "message": "Add a per-inode lock around btrfs_drop_extents\n\nbtrfs_drop_extents is always called with a range lock held on the inode.\nBut, it may operate on extents outside that range as it drops and splits\nthem.\n\nThis patch adds a per-inode mutex that is held while calling\nbtrfs_drop_extents and while inserting new extents into the tree. It\nprevents races from two procs working against adjacent ranges in the tree.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "ba1da2f442ec91a1534afa893f9bef7e33056ace", "tree": "bc567aa83da6d709d3762f7e0bf9a5fe4d16de11", "parents": [ "f9295749388f82c8d2f485e99c72cd7c7876a99b" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Jul 17 12:54:15 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:04 2008 -0400" }, "message": "Btrfs: Don\u0027t pin pages in ram until the entire ordered extent is on disk.\n\nChecksum items are not inserted until the entire ordered extent is on disk,\nbut individual pages might be clean and available for reclaim long before\nthe whole extent is on disk.\n\nIn order to allow those pages to be freed, we need to be able to search\nthe list of ordered extents to find the checksum that is going to be inserted\nin the tree. This way if the page needs to be read back in before\nthe checksums are in the btree, we\u0027ll be able to verify the checksum on\nthe page.\n\nThis commit adds the ability to search the pending ordered extents for\na given offset in the file, and changes btrfs_releasepage to allow\nordered pages to be freed.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "f9295749388f82c8d2f485e99c72cd7c7876a99b", "tree": "5089b0f723583d262116775b8b9fb5b4b8d291e0", "parents": [ "dbe674a99c8af088faa4c95eddaeb271a3140ab6" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Jul 17 12:54:14 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:04 2008 -0400" }, "message": "btrfs_start_transaction: wait for commits in progress to finish\n\nbtrfs_commit_transaction has to loop waiting for any writers in the\ntransaction to finish before it can proceed. btrfs_start_transaction\nshould be polite and not join a transaction that is in the process\nof being finished off.\n\nThere are a few places that can\u0027t wait, basically the ones doing IO that\nmight be needed to finish the transaction. For them, btrfs_join_transaction\nis added.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "dbe674a99c8af088faa4c95eddaeb271a3140ab6", "tree": "c6b5a08e93d0b09df873fd5c304156622d03368a", "parents": [ "247e743cbe6e655768c3679f84821e03c1577902" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Jul 17 12:54:05 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 25 11:04:04 2008 -0400" }, "message": "Btrfs: Update on disk i_size only after pending ordered extents are done\n\nThis changes the ordered data code to update i_size after the extent\nis on disk. An on disk i_size is maintained in the in-memory btrfs inode\nstructures, and this is updated as extents finish.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" } ], "next": "247e743cbe6e655768c3679f84821e03c1577902" }