)]}' { "log": [ { "commit": "eaf25d933e64c2bf3c79b83e8820404f36fdfc52", "tree": "649dc862fcc9a243bdc925db34da618b25a275fc", "parents": [ "ed3b3d314cd2f16fac42676839854a68cab2e22b" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue May 25 09:48:28 2010 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue May 25 10:34:58 2010 -0400" }, "message": "Btrfs: use async helpers for DIO write checksumming\n\nThe async helper threads offload crc work onto all the\nCPUs, and make streaming writes much faster. This\nchanges the O_DIRECT write code to use them. The only\nsmall complication was that we need to pass in the\nlogical offset in the file for each bio, because we can\u0027t\nfind it in the bio\u0027s pages.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "4a500fd178c89b96fa166a2d9e7855df33429841", "tree": "b97fe0b0c1cb19388fcf28f77cd74a645ec69a61", "parents": [ "d68fc57b7e3245cfacf2e3b47acfed1946a11786" ], "author": { "name": "Yan, Zheng", "email": "zheng.yan@oracle.com", "time": "Sun May 16 10:49:59 2010 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue May 25 10:34:53 2010 -0400" }, "message": "Btrfs: Metadata ENOSPC handling for tree log\n\nPrevious patches make the allocater return -ENOSPC if there is no\nunreserved free metadata space. This patch updates tree log code\nand various other places to propagate/handle the ENOSPC error.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "d68fc57b7e3245cfacf2e3b47acfed1946a11786", "tree": "c2572fcd935017440c8370c8a12ceb49a7fc4f1f", "parents": [ "8929ecfa50f266163832eeacfbc3642ed5eb83b6" ], "author": { "name": "Yan, Zheng", "email": "zheng.yan@oracle.com", "time": "Sun May 16 10:49:58 2010 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue May 25 10:34:52 2010 -0400" }, "message": "Btrfs: Metadata reservation for orphan inodes\n\nreserve metadata space for handling orphan inodes\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "8929ecfa50f266163832eeacfbc3642ed5eb83b6", "tree": "e0177748af36d49d5f652cff0e421a8268cf7194", "parents": [ "0ca1f7ceb1991099ed5273885ebcf4323948c72e" ], "author": { "name": "Yan, Zheng", "email": "zheng.yan@oracle.com", "time": "Sun May 16 10:49:58 2010 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue May 25 10:34:52 2010 -0400" }, "message": "Btrfs: Introduce global metadata reservation\n\nReserve metadata space for extent tree, checksum tree and root tree\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": "f0486c68e4bd9a06a5904d3eeb3a0d73a83befb8", "tree": "509428ef400ef45e875a3c448b63b86cbea36aea", "parents": [ "2ead6ae770d9f9dec9f4286bf0fd9001b4388c4b" ], "author": { "name": "Yan, Zheng", "email": "zheng.yan@oracle.com", "time": "Sun May 16 10:46:25 2010 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue May 25 10:34:50 2010 -0400" }, "message": "Btrfs: Introduce contexts for metadata reservation\n\nIntroducing metadata reseravtion contexts has two major advantages.\nFirst, it makes metadata reseravtion more traceable. Second, it can\nreclaim freed space and re-add them to the itself after transaction\ncommitted.\n\nBesides add btrfs_block_rsv structure and related helper functions,\nThis patch contains following changes:\n\nMove code that decides if freed tree block should be pinned into\nbtrfs_free_tree_block().\n\nMake space accounting more accurate, mainly for handling read only\nblock groups.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "5da9d01b66458b180a6bee0e637a1d0a3effc622", "tree": "47eca61c0ad07ddc791cb7677c548d663fbac818", "parents": [ "424499dbd0c4d88742bf581b5714b27fb44b9fef" ], "author": { "name": "Yan, Zheng", "email": "zheng.yan@oracle.com", "time": "Sun May 16 10:46:25 2010 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue May 25 10:34:48 2010 -0400" }, "message": "Btrfs: Shrink delay allocated space in a synchronized\n\nShrink delayed allocation space in a synchronized manner is more\ncontrollable than flushing all delay allocated space in an async\nthread.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "e6d086d83cf7f102d48c006f58172a69ec0c15a4", "tree": "be8cf9ab5c593982dded8585d1e9961a1e83b1e5", "parents": [ "5129a469a91a91427334c40e29e64c6d0ab68caf" ], "author": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Mon Apr 26 10:27:54 2010 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Mon Apr 26 10:27:54 2010 +0200" }, "message": "btrfs: convert to using bdi_setup_and_register()\n\nIt\u0027s now a provided helper, so get rid of the internal setup\nand btrfs atomic_t bdi enumerator.\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "795d580baec0d5386b83a8b557df47c20810e86b", "tree": "d0387c37562e9e27a4f43cf7ae425319cbdad359", "parents": [ "449cedf099b23a250e7d61982e35555ccb871182", "109f6aef5fc436f355ad027f4d97bd696df2049a" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 05 13:21:15 2010 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Mon Apr 05 13:21:15 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:\n Btrfs: add check for changed leaves in setup_leaf_for_split\n Btrfs: create snapshot references in same commit as snapshot\n Btrfs: fix small race with delalloc flushing waitqueue\u0027s\n Btrfs: use add_to_page_cache_lru, use __page_cache_alloc\n Btrfs: fix chunk allocate size calculation\n Btrfs: kill max_extent mount option\n Btrfs: fail to mount if we have problems reading the block groups\n Btrfs: check btrfs_get_extent return for IS_ERR()\n Btrfs: handle kmalloc() failure in inode lookup ioctl\n Btrfs: dereferencing freed memory\n Btrfs: Simplify num_stripes\u0027s calculation logical for __btrfs_alloc_chunk()\n Btrfs: Add error handle for btrfs_search_slot() in btrfs_read_chunk_tree()\n Btrfs: Remove unnecessary finish_wait() in wait_current_trans()\n Btrfs: add NULL check for do_walk_down()\n Btrfs: remove duplicate include in ioctl.c\n\nFix trivial conflict in fs/btrfs/compression.c due to slab.h include\ncleanups.\n" }, { "commit": "287a0ab91d25ca982f895a76402e5893b47ed7a6", "tree": "fcbe35daef2b4cbdc2bfc0c6026e7c45faef0245", "parents": [ "1b1d1f6625e517a08640ddb4b8f8a0e025243fe3" ], "author": { "name": "Josef Bacik", "email": "josef@redhat.com", "time": "Fri Mar 19 18:07:23 2010 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Mar 30 21:19:09 2010 -0400" }, "message": "Btrfs: kill max_extent mount option\n\nAs Yan pointed out, theres not much reason for all this complicated math to\naccount for file extents being split up into max_extent chunks, since they are\nlikely to all end up in the same leaf anyway. Since there isn\u0027t much reason to\nuse max_extent, just remove the option altogether so we have one less thing we\nneed to test.\n\nSigned-off-by: Josef Bacik \u003cjosef@redhat.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "1b1d1f6625e517a08640ddb4b8f8a0e025243fe3", "tree": "d662fe7e7d9ddec1214982b3dcd955228e18562f", "parents": [ "6cf8bfbf5e88edfb09a2bf0631a067060f534592" ], "author": { "name": "Josef Bacik", "email": "josef@redhat.com", "time": "Fri Mar 19 20:49:55 2010 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Mar 30 21:19:09 2010 -0400" }, "message": "Btrfs: fail to mount if we have problems reading the block groups\n\nWe don\u0027t actually check the return value of btrfs_read_block_groups, so we can\npossibly succeed to mount, but then fail to say read the superblock xattr for\nselinux which will cause the vfs code to deactivate the super.\n\nThis is a problem because in find_free_extent we just assume that we\nwill find the right space_info for the allocation we want. But if we\nfailed to read the block groups, we won\u0027t have setup any space_info\u0027s,\nand we\u0027ll hit a NULL pointer deref in find_free_extent.\n\nThis patch fixes that problem by checking the return value of\nbtrfs_read_block_groups, and failing out properly. I\u0027ve also added a\ncheck in find_free_extent so if for some reason we don\u0027t find an\nappropriate space_info, we just return -ENOSPC.\n\nSigned-off-by: Josef Bacik \u003cjosef@redhat.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": "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": "6bef4d317193d3badbbfa3f3c593758ace84a629", "tree": "8aa9fcf3297c69033b9a9a83a27ecccaab0f9d7d", "parents": [ "3f6fae9559225741c91f1320090b285da1413290" ], "author": { "name": "Eric Paris", "email": "eparis@redhat.com", "time": "Tue Feb 23 19:43:04 2010 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Mar 08 16:26:50 2010 -0500" }, "message": "Btrfs: use RB_ROOT to intialize rb_trees instead of setting rb_node to NULL\n\nbtrfs inialize rb trees in quite a number of places by settin rb_node \u003d\nNULL; The problem with this is that 17d9ddc72fb8bba0d4f678 in the\nlinux-next tree adds a new field to that struct which needs to be NULL for\nthe new rbtree library code to work properly. This patch uses RB_ROOT as\nthe intializer so all of the relevant fields will be NULL\u0027d. Without the\npatch I get a panic.\n\nSigned-off-by: Eric Paris \u003ceparis@redhat.com\u003e\nAcked-by: Venkatesh Pallipadi \u003cvenkatesh.pallipadi@intel.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "d7ce5843bb28ada6845ab2ae8510ba3f12d33154", "tree": "c7468abdcaa1d59d789af027984abfdc1bda5248", "parents": [ "014e4ac4f7d9c981750491fa40ea35efadc9ed49" ], "author": { "name": "Miao Xie", "email": "miaox@cn.fujitsu.com", "time": "Tue Feb 02 08:46:44 2010 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Feb 04 11:31:44 2010 -0500" }, "message": "Btrfs: remove BUG_ON() due to mounting bad filesystem\n\nMounting a bad filesystem caused a BUG_ON(). The following is steps to\nreproduce it.\n # mkfs.btrfs /dev/sda2\n # mount /dev/sda2 /mnt\n # mkfs.btrfs /dev/sda1 /dev/sda2\n (the program says that /dev/sda2 was mounted, and then exits. )\n # umount /mnt\n # mount /dev/sda1 /mnt\n\nAt the third step, mkfs.btrfs exited in the way of make filesystem. So the\ninitialization of the filesystem didn\u0027t finish. So the filesystem was bad, and\nit caused BUG_ON() when mounting it. But BUG_ON() should be called by the wrong\ncode, not user\u0027s operation, so I think it is a bug of btrfs.\n\nThis patch fixes it.\n\nSigned-off-by: Miao Xie \u003cmiaox@cn.fujitsu.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "e3acc2a6850efff647f1c5458524eb3a8bcba20a", "tree": "a111740f879f5f0cbbcaf079c2500535263c1278", "parents": [ "f858153c367a397235d3e81136741e40e44faf1d" ], "author": { "name": "Josef Bacik", "email": "josef@redhat.com", "time": "Tue Jan 26 14:30:53 2010 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Jan 28 16:20:39 2010 -0500" }, "message": "Btrfs: run orphan cleanup on default fs root\n\nThis patch revert\u0027s commit\n\n6c090a11e1c403b727a6a8eff0b97d5fb9e95cb5\n\nSince it introduces this problem where we can run orphan cleanup on a\nvolume that can have orphan entries re-added. Instead of my original\nfix, Yan Zheng pointed out that we can just revert my original fix and\nthen run the orphan cleanup in open_ctree after we look up the fs_root.\nI have tested this with all the tests that gave me problems and this\npatch fixes both problems. Thanks,\n\nSigned-off-by: Josef Bacik \u003cjosef@redhat.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "24bbcf0442ee04660a5a030efdbb6d03f1c275cb", "tree": "aa57d77d29cc5150b272cc3f6465f10262fcbaac", "parents": [ "f34f57a3ab4e73304d78c125682f1a53cd3975f2" ], "author": { "name": "Yan, Zheng", "email": "zheng.yan@oracle.com", "time": "Thu Nov 12 09:36:34 2009 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Dec 17 12:33:35 2009 -0500" }, "message": "Btrfs: Add delayed iput\n\niput() can trigger new transactions if we are dropping the\nfinal reference, so calling it in btrfs_commit_transaction\nmay end up deadlock. This patch adds delayed iput to avoid\nthe issue.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "c71bf099abddf3e0fdc27f251ba76fca1461d49a", "tree": "0b682ad2b49aeaf9ac774c40be4b7549c1d079fe", "parents": [ "c216775458a2ee345d9412a2770c2916acfb5d30" ], "author": { "name": "Yan, Zheng", "email": "zheng.yan@oracle.com", "time": "Thu Nov 12 09:34:40 2009 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Dec 17 12:33:33 2009 -0500" }, "message": "Btrfs: Avoid orphan inodes cleanup while replaying log\n\nWe do log replay in a single transaction, so it\u0027s not good to do unbound\noperations. This patch cleans up orphan inodes cleanup after replaying\nthe log. It also avoids doing other unbound operations such as truncating\na file during replaying log. These unbound operations are postponed to\nthe orphan inode cleanup stage.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "8cef4e160d74920ad1725f58c89fd75ec4c4ac38", "tree": "c1592369c7085e75d67a1709438a4f56351b2348", "parents": [ "22763c5cf3690a681551162c15d34d935308c8d7" ], "author": { "name": "Yan, Zheng", "email": "zheng.yan@oracle.com", "time": "Thu Nov 12 09:33:26 2009 +0000" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Dec 15 21:24:25 2009 -0500" }, "message": "Btrfs: Avoid superfluous tree-log writeout\n\nWe allow two log transactions at a time, but use same flag\nto mark dirty tree-log btree blocks. So we may flush dirty\nblocks belonging to newer log transaction when committing a\nlog transaction. This patch fixes the issue by using two\nflags to mark dirty tree-log btree blocks.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\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": "e3ccfa989752c083ceb23c823a84f7ce3a081e61", "tree": "197558cbee7b773b8270cd861f882a37beacd2ed", "parents": [ "32c00aff718bb54a214b39146bdd9ac01511cd25" ], "author": { "name": "Josef Bacik", "email": "josef@redhat.com", "time": "Wed Oct 07 20:44:34 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Oct 08 15:21:23 2009 -0400" }, "message": "Btrfs: async delalloc flushing under space pressure\n\nThis patch moves the delalloc flushing that occurs when we are under space\npressure off to a async thread pool. This helps since we only free up\nmetadata space when we actually insert the extent item, which means it takes\nquite a while for space to be free\u0027ed up if we wait on all ordered extents.\nHowever, if space is freed up due to inline extents being inserted, we can\nwake people who are waiting up early, and they can finish their work.\n\nSigned-off-by: Josef Bacik \u003cjbacik@redhat.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "61d92c328c16419fc96dc50dd16f8b8c695409ec", "tree": "e9cd82eb56ff5f38f64d9f35229d15496e5d53de", "parents": [ "fbf190874407f23d2891b53ffdf7d3c6be8d47ff" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Oct 02 19:11:56 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Oct 05 09:44:45 2009 -0400" }, "message": "Btrfs: fix deadlock on async thread startup\n\nThe btrfs async worker threads are used for a wide variety of things,\nincluding processing bio end_io functions. This means that when\nthe endio threads aren\u0027t running, the rest of the FS isn\u0027t\nable to do the final processing required to clear PageWriteback.\n\nThe endio threads also try to exit as they become idle and\nstart more as the work piles up. The problem is that starting more\nthreads means kthreadd may need to allocate ram, and that allocation\nmay wait until the global number of writeback pages on the system is\nbelow a certain limit.\n\nThe result of that throttling is that end IO threads wait on\nkthreadd, who is waiting on IO to end, which will never happen.\n\nThis commit fixes the deadlock by handing off thread startup to a\ndedicated thread. It also fixes a bug where the on-demand thread\ncreation was creating far too many threads because it didn\u0027t take into\naccount threads being started by other procs.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\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": "35d62a942db5ae03104929fe7397835b572c4bc4", "tree": "91ea5b0a79e898f57cd644e1ff0437748aa0781b", "parents": [ "dd7e0b7b02ccff73b87032e20fc5b4f2c1cfcc14" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Wed Sep 30 16:47:08 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Oct 01 10:27:01 2009 -0400" }, "message": "Btrfs: fix arguments to btrfs_wait_on_page_writeback_range\n\nwait_on_page_writeback_range/btrfs_wait_on_page_writeback_range takes\na pagecache offset, not a byte offset into the file. Shift the arguments\naround to wait for the correct range\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\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": "54bcf382daf08c1396edb8b81e650b58930ccaef", "tree": "64b941f09489b5c9ee63e4ad43d736bfce911b21", "parents": [ "94a8d5caba74211ec76dac80fc6e2d5c391530df", "c65ddb52dc412c9b67681b1aa16cd1bac8434e24" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 24 10:00:58 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 24 10:00:58 2009 -0400" }, "message": "Merge branch \u0027master\u0027 of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable into for-linus\n\nConflicts:\n\tfs/btrfs/super.c\n" }, { "commit": "c65ddb52dc412c9b67681b1aa16cd1bac8434e24", "tree": "1febb9b954e1569d46382abd741ee7bbd3670173", "parents": [ "0257bb82d21bedff26541bcf12f1461c23f9ed61" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Thu Sep 24 09:24:43 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 24 09:24:43 2009 -0400" }, "message": "Btrfs: hash the btree inode during fill_super\n\nThe snapshot deletion patches dropped this line, but the inode\nneeds to be hashed.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "7f09410bbc4306f592cfb43812389ea1c7905a20", "tree": "18f179435f70c4ec9231883501062d5ea0357af5", "parents": [ "ac4cfdd6d141c319a7af8655f750ed504c187a74" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Mon Sep 21 17:01:10 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Sep 22 07:17:24 2009 -0700" }, "message": "const: mark remaining address_space_operations const\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "76dda93c6ae2c1dc3e6cde34569d6aca26b0c918", "tree": "f5ca46ec89d4ae2c762952d5f35e2c6f95ac046a", "parents": [ "4df27c4d5cc1dda54ed7d0a8389347f2df359cf9" ], "author": { "name": "Yan, Zheng", "email": "zheng.yan@oracle.com", "time": "Mon Sep 21 16:00:26 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Sep 21 16:00:26 2009 -0400" }, "message": "Btrfs: add snapshot/subvolume destroy ioctl\n\nThis patch adds snapshot/subvolume destroy ioctl. A subvolume that isn\u0027t being\nused and doesn\u0027t contains links to other subvolumes can be destroyed.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "4df27c4d5cc1dda54ed7d0a8389347f2df359cf9", "tree": "2008f348d28c6c19e31924ae4fb414ca929a01f1", "parents": [ "13a8a7c8c47e542b3cdb45bec3f431f96af79361" ], "author": { "name": "Yan, Zheng", "email": "zheng.yan@oracle.com", "time": "Mon Sep 21 15:56:00 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Sep 21 15:56:00 2009 -0400" }, "message": "Btrfs: change how subvolumes are organized\n\nbtrfs allows subvolumes and snapshots anywhere in the directory tree.\nIf we snapshot a subvolume that contains a link to other subvolume\ncalled subvolA, subvolA can be accessed through both the original\nsubvolume and the snapshot. This is similar to creating hard link to\ndirectory, and has the very similar problems.\n\nThe aim of this patch is enforcing there is only one access point to\neach subvolume. Only the first directory entry (the one added when\nthe subvolume/snapshot was created) is treated as valid access point.\nThe first directory entry is distinguished by checking root forward\nreference. If the corresponding root forward reference is missing,\nwe know the entry is not the first one.\n\nThis patch also adds snapshot/subvolume rename support, the code\nallows rename subvolume link across subvolumes.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "13a8a7c8c47e542b3cdb45bec3f431f96af79361", "tree": "473f3cc94b4a93a0a5f6f19b1832ef2e6b7ecf62", "parents": [ "1c4850e21df8b441164d910bc611ef46a01d5d75" ], "author": { "name": "Yan, Zheng", "email": "zheng.yan@oracle.com", "time": "Mon Sep 21 15:56:00 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Sep 21 15:56:00 2009 -0400" }, "message": "Btrfs: do not reuse objectid of deleted snapshot/subvol\n\nThe new back reference format does not allow reusing objectid of\ndeleted snapshot/subvol. So we use ++highest_objectid to allocate\nobjectid for new snapshot/subvol.\n\nNow we use ++highest_objectid to allocate objectid for both new inode\nand new snapshot/subvolume, so this patch removes \u0027find hole\u0027 code in\nbtrfs_find_free_objectid.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "11833d66be94b514652466802100378046c16b72", "tree": "2b00b36d0aa42e9e10cecf3bf723eb70a607afec", "parents": [ "6e74057c4686dc12ea767b4bdc50a63876056e1c" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Fri Sep 11 16:11:19 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Sep 17 15:47:36 2009 -0400" }, "message": "Btrfs: improve async block group caching\n\nThis patch gets rid of two limitations of async block group caching.\nThe old code delays handling pinned extents when block group is in\ncaching. To allocate logged file extents, the old code need wait\nuntil block group is fully cached. To get rid of the limitations,\nThis patch introduces a data structure to track the progress of\ncaching. Base on the caching progress, we know which extents should\nbe added to the free space cache when handling the pinned extents.\nThe logged file extents are also handled in a similar way.\n\nThis patch also changes how pinned extents are tracked. The old\ncode uses one tree to track pinned extents, and copy the pinned\nextents tree at transaction commit time. This patch makes it use\ntwo trees to track pinned extents. One tree for extents that are\npinned in the running transaction, one tree for extents that can\nbe unpinned. At transaction commit time, we swap the two trees.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "32a88aa1b6dfb901cec64e1898cac78d0f25028a", "tree": "51aa6f56ccfca53f495d015645373317bdee3647", "parents": [ "c4a77a6c7dcff04a2abc7fe4b6b2ae605be41c5b" ], "author": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Wed Sep 16 15:02:33 2009 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Wed Sep 16 15:18:51 2009 +0200" }, "message": "fs: Assign bdi in super_block\n\nWe do this automatically in get_sb_bdev() from the set_bdev_super()\ncallback. Filesystems that have their own private backing_dev_info\nmust assign that in -\u003efill_super().\n\nNote that -\u003es_bdi assignment is required for proper writeback!\n\nAcked-by: Christoph Hellwig \u003chch@infradead.org\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "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": "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": "9042846bc7ae69cc3288d85af6bad16208d93a95", "tree": "d46077d217d31ce5600ef870c92fcdf330922b41", "parents": [ "ceab36edd3d3ad3ffd01d41d6d1e05ac1ff8357e" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Aug 04 16:56:34 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Sep 11 13:30:56 2009 -0400" }, "message": "Btrfs: Allow worker threads to exit when idle\n\nThe Btrfs worker threads don\u0027t currently die off after they have\nbeen idle for a while, leading to a lot of threads sitting around\ndoing nothing for each mount.\n\nAlso, they are unable to start atomically (from end_io hanlders).\n\nThis commit reworks the worker threads so they can be started\nfrom end_io handlers (just setting a flag that asks for a thread\nto be added at a later date) and so they can exit if they\nhave been idle for a long time.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "d993831fa7ffeb89e994f046f93eeb09ec91df08", "tree": "da4f94bbf022c83988bda71adf1f1b3a88cb4592", "parents": [ "f09b00d3e789a88fa6c7c03cedc62cb65c1de0cb" ], "author": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Fri Jun 12 14:45:52 2009 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Fri Sep 11 09:20:26 2009 +0200" }, "message": "writeback: add name to backing_dev_info\n\nThis enables us to track who does what and print info. Its main use\nis catching dirty inodes on the default_backing_dev_info, so we can\nfix that up.\n\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "ec6a8679fa8ce977c8b7f86238455b494699de74", "tree": "d06401567f67cd757ddf358168bdf574cb4b94f5", "parents": [ "db06816cb9ceb21a2bf24122407b7b4fe419c3fc", "f36f3042eae238bdaefe7c79310afe573bfc3622" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 30 16:46:48 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Thu Jul 30 16:46:48 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: be more polite in the async caching threads\n Btrfs: preserve commit_root for async caching\n" }, { "commit": "276e680d192a67d222fcea51af37b056feffb665", "tree": "137bae016c30f24e7fafcbc8073e3411b732eb31", "parents": [ "f25784b35f590c81d5fb8245a8cd45e1afb6f1b2" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Thu Jul 30 09:40:40 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Jul 30 09:40:40 2009 -0400" }, "message": "Btrfs: preserve commit_root for async caching\n\nThe async block group caching code uses the commit_root pointer\nto get a stable version of the extent allocation tree for scanning.\nThis copy of the tree root isn\u0027t going to change and it significantly\nreduces the complexity of the scanning code.\n\nDuring a commit, we have a loop where we update the extent allocation\ntree root. We need to loop because updating the root pointer in\nthe tree of tree roots may allocate blocks which may change the\nextent allocation tree.\n\nRight now the commit_root pointer is changed inside this loop. It\nis more correct to change the commit_root pointer only after all the\nlooping is done.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "655c5d8fc110a9d4f90cc831bd009936f3e8df28", "tree": "6acb038a6dd8831830d8ae2f5485a4e411d0b579", "parents": [ "ce4adcc6e5320062e0d993eb75152d165aaabbe6", "f25784b35f590c81d5fb8245a8cd45e1afb6f1b2" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jul 28 14:27:06 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Jul 28 14:27:06 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: (22 commits)\n Btrfs: Fix async caching interaction with unmount\n Btrfs: change how we unpin extents\n Btrfs: Correct redundant test in add_inode_ref\n Btrfs: find smallest available device extent during chunk allocation\n Btrfs: clear all space_info-\u003efull after removing a block group\n Btrfs: make flushoncommit mount option correctly wait on ordered_extents\n Btrfs: Avoid delayed reference update looping\n Btrfs: Fix ordering of key field checks in btrfs_previous_item\n Btrfs: find_free_dev_extent doesn\u0027t handle holes at the start of the device\n Btrfs: Remove code duplication in comp_keys\n Btrfs: async block group caching\n Btrfs: use hybrid extents+bitmap rb tree for free space\n Btrfs: Fix crash on read failures at mount\n Btrfs: remove of redundant btrfs_header_level\n Btrfs: adjust NULL test\n Btrfs: Remove broken sanity check from btrfs_rmap_block()\n Btrfs: convert nested spin_lock_irqsave to spin_lock\n Btrfs: make sure all dirty blocks are written at commit time\n Btrfs: fix locking issue in btrfs_find_next_key\n Btrfs: fix double increment of path-\u003eslots[0] in btrfs_next_leaf\n ...\n" }, { "commit": "f25784b35f590c81d5fb8245a8cd45e1afb6f1b2", "tree": "71306747041b6e4a5eaccc5028c770fed29b3f87", "parents": [ "68b38550ddbea13d296184bf69edff387618b1d3" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Tue Jul 28 08:41:57 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Jul 28 08:41:57 2009 -0400" }, "message": "Btrfs: Fix async caching interaction with unmount\n\n- don\u0027t stop the caching thread until btrfs_commit_super return.\n\n- if caching is interrupted by umount, set last to (u64)-1.\n otherwise the un-scanned range of block group will be considered\n as free extent.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "68b38550ddbea13d296184bf69edff387618b1d3", "tree": "c0c3901b77f273ac08c39c641586884f41a90b84", "parents": [ "631c07c8d12bcc6ce4a0fbfbd64ea843d78e2b10" ], "author": { "name": "Josef Bacik", "email": "josef@redhat.com", "time": "Mon Jul 27 13:57:01 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Jul 27 13:57:01 2009 -0400" }, "message": "Btrfs: change how we unpin extents\n\nWe are racy with async block caching and unpinning extents. This patch makes\nthings much less complicated by only unpinning the extent if the block group is\ncached. We check the block_group-\u003ecached var under the block_group-\u003elock spin\nlock. If it is set to BTRFS_CACHE_FINISHED then we update the pinned counters,\nand unpin the extent and add the free space back. If it is not set to this, we\nstart the caching of the block group so the next time we unpin extents we can\nunpin the extent. This keeps us from racing with the async caching threads,\nlets us kill the fs wide async thread counter, and keeps us from having to set\nDELALLOC bits for every extent we hit if there are caching kthreads going.\n\nOne thing that needed to be changed was btrfs_free_super_mirror_extents. Now\ninstead of just looking for LOCKED extents, we also look for DIRTY extents,\nsince we could have left some extents pinned in the previous transaction that\nwill never get freed now that we are unmounting, which would cause us to leak\nmemory. So btrfs_free_super_mirror_extents has been changed to\nbtrfs_free_pinned_extents, and it will clear the extents locked for the super\nmirror, and any remaining pinned extents that may be present. Thank you,\n\nSigned-off-by: Josef Bacik \u003cjbacik@redhat.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "817d52f8dba26d0295c26035531c30ce5f1e3c3e", "tree": "5230153e86323de48e7e1440352d1b74d2d9961d", "parents": [ "963030817060e4f109be1993b9ae8f81dbf5e11a" ], "author": { "name": "Josef Bacik", "email": "josef@redhat.com", "time": "Mon Jul 13 21:29:25 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Jul 24 09:23:39 2009 -0400" }, "message": "Btrfs: async block group caching\n\nThis patch moves the caching of the block group off to a kthread in order to\nallow people to allocate sooner. Instead of blocking up behind the caching\nmutex, we instead kick of the caching kthread, and then attempt to make an\nallocation. If we cannot, we wait on the block groups caching waitqueue, which\nthe caching kthread will wake the waiting threads up everytime it finds 2 meg\nworth of space, and then again when its finished caching. This is how I tested\nthe speedup from this\n\nmkfs the disk\nmount the disk\nfill the disk up with fs_mark\nunmount the disk\nmount the disk\ntime touch /mnt/foo\n\nWithout my changes this took 11 seconds on my box, with these changes it now\ntakes 1 second.\n\nAnother change thats been put in place is we lock the super mirror\u0027s in the\npinned extent map in order to keep us from adding that stuff as free space when\ncaching the block group. This doesn\u0027t really change anything else as far as the\npinned extent map is concerned, since for actual pinned extents we use\nEXTENT_DIRTY, but it does mean that when we unmount we have to go in and unlock\nthose extents to keep from leaking memory.\n\nI\u0027ve also added a check where when we are reading block groups from disk, if the\namount of space used \u003d\u003d the size of the block group, we go ahead and mark the\nblock group as cached. This drastically reduces the amount of time it takes to\ncache the block groups. Using the same test as above, except doing a dd to a\nfile and then unmounting, it used to take 33 seconds to umount, now it takes 3\nseconds.\n\nThis version uses the commit_root in the caching kthread, and then keeps track\nof how many async caching threads are running at any given time so if one of the\nasync threads is still running as we cross transactions we can wait until its\nfinished before handling the pinned extents. Thank you,\n\nSigned-off-by: Josef Bacik \u003cjbacik@redhat.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "83121942b28daffc9526b14b7843d8cdbd3db641", "tree": "7440a54bdc12e3aa7c268b9b747204dc0e1e2a5e", "parents": [ "c271b492419a18908ba19ee02b231fb305a27023" ], "author": { "name": "David Woodhouse", "email": "dwmw2@infradead.org", "time": "Wed Jul 22 16:52:13 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Jul 22 16:52:13 2009 -0400" }, "message": "Btrfs: Fix crash on read failures at mount\n\nIf the tree roots hit read errors during mount, btrfs is not properly\nerroring out. We need to check the uptodate bits after\nreading in the tree root node.\n\nSigned-off-by: David Woodhouse \u003cDavid.Woodhouse@intel.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "ad081f1430515d0b727eba99ec435a526c61a599", "tree": "0d76c5feb597d6b8d062699e48f695e17ce9223a", "parents": [ "0989a025d2f4f9f51ea641bd26c563c53dc63f55" ], "author": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Fri Jun 12 14:43:40 2009 +0200" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Tue Jun 16 08:21:03 2009 +0200" }, "message": "btrfs: properly register fs backing device\n\nbtrfs assigns this bdi to all inodes on that file system, so make\nsure it\u0027s registered. This isn\u0027t really important now, but will be\nwhen we put dirty inodes there. Even now, we miss the stats when the\nbdi isn\u0027t visible.\n\nAlso fixes failure to check bdi_init() return value, and bad inherit of\n-\u003ecapabilities flags from the default bdi.\n\nAcked-by: Chris Mason \u003cchris.mason@oracle.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@oracle.com\u003e\n" }, { "commit": "4eedeb75e7f15ffdb12d1ad559b565e7505bdbaf", "tree": "2f78c56c30d5f4f96b85d012bcb412262f6a735c", "parents": [ "e5e9a5206a171b2c467e494aebcdcf70c47289bc" ], "author": { "name": "Hisashi Hifumi", "email": "hifumi.hisashi@oss.ntt.co.jp", "time": "Wed Jun 10 15:28:55 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Jun 10 16:49:25 2009 -0400" }, "message": "Btrfs: pin buffers during write_dev_supers\n\nwrite_dev_supers is called in sequence. First is it called with wait \u003d\u003d 0,\nwhich starts IO on all of the super blocks for a given device. Then it is\ncalled with wait \u003d\u003d 1 to make sure they all reach the disk.\n\nIt doesn\u0027t currently pin the buffers between the two calls, and it also\nassumes the buffers won\u0027t go away between the two calls, leading to\nan oops if the VM manages to free the buffers in the middle of the sync.\n\nThis fixes that assumption and updates the code to return an error if things\nare not up to date when the wait \u003d\u003d 1 run is done.\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": "e5e9a5206a171b2c467e494aebcdcf70c47289bc", "tree": "d9a6a89cccbd084db923f1661b52d5a1dfdb83fe", "parents": [ "7df336ec1266dccbb253bac52c529d3dcc7c22d0" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Jun 10 15:17:02 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Jun 10 15:17:02 2009 -0400" }, "message": "Btrfs: avoid races between super writeout and device list updates\n\nOn multi-device filesystems, btrfs writes supers to all of the devices\nbefore considering a sync complete. There wasn\u0027t any additional\nlocking between super writeout and the device list management code\nbecause device management was done inside a transaction and\nsuper writeout only happened with no transation writers running.\n\nWith the btrfs fsync log and other async transaction updates, this\nhas been racey for some time. This adds a mutex to protect\nthe device list. The existing volume mutex could not be reused due to\ntransaction lock ordering requirements.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "163e783e6a8b1e8bcb4c9084d438091386b589df", "tree": "dd7fbe662b7c81ba8c548b309fed4376f07ea495", "parents": [ "6cbff00f4632c8060b06bfc9585805217f11e12e" ], "author": { "name": "David Woodhouse", "email": "dwmw2@infradead.org", "time": "Sun Apr 19 13:02:41 2009 +0100" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Jun 10 11:29:53 2009 -0400" }, "message": "Btrfs: remove crc32c.h and use libcrc32c directly.\n\nThere\u0027s no need to preserve this abstraction; it used to let us use\nhardware crc32c support directly, but libcrc32c is already doing that for us\nthrough the crypto API -- so we\u0027re already using the Intel crc32c\nacceleration where appropriate.\n\nSigned-off-by: David Woodhouse \u003cDavid.Woodhouse@intel.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "c289811cc096c57ff35550ee8132793a4f9b5b59", "tree": "47599d47419911c8365e0350e286dece1d5e48dd", "parents": [ "451d7585a8bb1b9bec0d676ce3dece1923164e55" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Jun 10 09:51:32 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Jun 10 11:29:52 2009 -0400" }, "message": "Btrfs: autodetect SSD devices\n\nDuring mount, btrfs will check the queue nonrot flag\nfor all the devices found in the FS. If they are all\nnon-rotating, SSD mode is enabled by default.\n\nIf the FS was mounted with -o nossd, the non-rotating\nflag is ignored.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "585ad2c3797dcaa643aeba75b9f072778adf3490", "tree": "4d48ff8f61f81a84bc620eb59215e1273f788d35", "parents": [ "2c943de6ad795a174dcc424c293bb77f15ae3b8c" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon May 18 10:41:58 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Jun 10 11:29:48 2009 -0400" }, "message": "Btrfs: fix metadata dirty throttling limits\n\nOnce a metadata block has been written, it must be recowed, so the\nbtrfs dirty balancing call has a check to make sure a fair amount of metadata\nwas actually dirty before it started writing it back to disk.\n\nA previous commit had changed the dirty tracking for metadata without\nupdating the btrfs dirty balancing checks. This commit switches it\nto use the correct counter.\n\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": "cc7b0c9b701a079016183f3546b4d720194b367f", "tree": "a68f31ebb251158dd977c84f33a35a38728fe8aa", "parents": [ "76a05b35a320e8c968d0fec8f512a1acae227309" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu May 14 13:31:21 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu May 14 14:00:33 2009 -0400" }, "message": "Btrfs: remove some WARN_ONs in the IO failure path\n\nThese debugging WARN_ONs make too much console noise during regular\nIO failures. An IO failure will still generate a number of messages\nas we verify checksums etc, but these two are not needed.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "21380931eb4da4e29ac663d0221581282cbba208", "tree": "fa8c2155784ccb0ee996e52e75d1e04b79cf2560", "parents": [ "e63b6a6c0ffa2ebd8617cc1a10969000296831aa" ], "author": { "name": "Joel Becker", "email": "joel.becker@oracle.com", "time": "Tue Apr 21 12:38:29 2009 -0700" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Apr 27 08:37:49 2009 -0400" }, "message": "Btrfs: Fix a bunch of printk() warnings.\n\nJust happened to notice a bunch of %llu vs u64 warnings. Here\u0027s a patch\nto cast them all.\n\nSigned-off-by: Joel Becker \u003cjoel.becker@oracle.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "193f284d4985db0370a8a1bbdfb20df548cf9ffb", "tree": "dfa8aec1c8000e5e00deb4eee4dc385a405d74a6", "parents": [ "b7967db75a38df4891b22efe1b0969b9357eb946" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Apr 27 07:29:05 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Apr 27 07:41:47 2009 -0400" }, "message": "Btrfs: ratelimit IO error printks\n\nBtrfs has printks for various IO errors, including bad checksums and\nmismatches between what we expect the block headers to contain and what\nwe actually find on the disk.\n\nLonger term we need a real reporting mechanism for this, but for now\nprintk is going to have to do.\n\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": "97e728d4353f38c87bf0804cdfd79a9b13fc2c3e", "tree": "853d3317ff1476e4ad28921265e28b4919196304", "parents": [ "546888da82082555a56528730a83f0afd12f33bf" ], "author": { "name": "Josef Bacik", "email": "jbacik@redhat.com", "time": "Tue Apr 21 17:40:57 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Apr 24 15:46:02 2009 -0400" }, "message": "Btrfs: try to keep a healthy ratio of metadata vs data block groups\n\nThis patch makes the chunk allocator keep a good ratio of metadata vs data\nblock groups. By default for every 8 data block groups, we\u0027ll allocate 1\nmetadata chunk, or about 12% of the disk will be allocated for metadata. This\ncan be changed by specifying the metadata_ratio mount option.\n\nThis is simply the number of data block groups that have to be allocated to\nforce a metadata chunk allocation. By making sure we allocate metadata chunks\nmore often, we are less likely to get into situations where the whole disk\nhas been allocated as data block groups.\n\nSigned-off-by: Josef Bacik \u003cjbacik@redhat.com\u003e\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": "ffbd517d5a8c8e93ddd11046434fb029f3df73aa", "tree": "9ec7b7f2efbb8950ca2654235a899398e82a68b5", "parents": [ "0882e8dd3aad33eca41696d463bb896e6c8817eb" ], "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: use WRITE_SYNC for synchronous writes\n\nPart of reducing fsync/O_SYNC/O_DIRECT latencies is using WRITE_SYNC for\nwrites we plan on waiting on in the near future. This patch\nmirrors recent changes in other filesystems and the generic code to\nuse WRITE_SYNC when WB_SYNC_ALL is passed and to use WRITE_SYNC for\nother latency critical writes.\n\nBtrfs uses async worker threads for checksumming before the write is done,\nand then again to actually submit the bios. The bio submission code just\nruns a per-device list of bios that need to be sent down the pipe.\n\nThis list is split into low priority and high priority lists so the\nWRITE_SYNC IO happens first.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "b983471794e568fd71fa767da77a62ba517c3e63", "tree": "92a1cc26c4846b49d90225d004ba1b7bd6fe3d81", "parents": [ "5a3ae276057840f0e60664c12fc3ef80aa59d1d4", "c293498be69816087746161338de4b81efdf69fc" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 15:14:44 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Apr 03 15:14:44 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: BUG to BUG_ON changes\n Btrfs: remove dead code\n Btrfs: remove dead code\n Btrfs: fix typos in comments\n Btrfs: remove unused ftrace include\n Btrfs: fix __ucmpdi2 compile bug on 32 bit builds\n Btrfs: free inode struct when btrfs_new_inode fails\n Btrfs: fix race in worker_loop\n Btrfs: add flushoncommit mount option\n Btrfs: notreelog mount option\n Btrfs: introduce btrfs_show_options\n Btrfs: rework allocation clustering\n Btrfs: Optimize locking in btrfs_next_leaf()\n Btrfs: break up btrfs_search_slot into smaller pieces\n Btrfs: kill the pinned_mutex\n Btrfs: kill the block group alloc mutex\n Btrfs: clean up find_free_extent\n Btrfs: free space cache cleanups\n Btrfs: unplug in the async bio submission threads\n Btrfs: keep processing bios for a given bdev if our proc is batching\n" }, { "commit": "3e7ad38d20ad113158d1b4c9de0f51c04f50d4f7", "tree": "5ff4dc364642eb81ae3f9d57c705234d2fde816f", "parents": [ "ff0a5836ac48554b9f3b9d3c5f5bce4ddea11f1f" ], "author": { "name": "Dan Carpenter", "email": "error27@gmail.com", "time": "Thu Apr 02 16:46:06 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Apr 02 16:46:06 2009 -0400" }, "message": "Btrfs: remove dead code\n\nRemove an unneeded return statement and conditional\n\nSigned-off-by: Dan Carpenter \u003cerror27@gmail.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" }, { "commit": "fa9c0d795f7b57c76560b7fac703f5d341210e28", "tree": "74d9d9846e21ce5b99738f3cc13b855fb63d1eba", "parents": [ "8e73f275011b3264a87339fd9f1690e944e381c9" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Apr 03 09:47:43 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Apr 03 09:47:43 2009 -0400" }, "message": "Btrfs: rework allocation clustering\n\nBecause btrfs is copy-on-write, we end up picking new locations for\nblocks very often. This makes it fairly difficult to maintain perfect\nread patterns over time, but we can at least do some optimizations\nfor writes.\n\nThis is done today by remembering the last place we allocated and\ntrying to find a free space hole big enough to hold more than just one\nallocation. The end result is that we tend to write sequentially to\nthe drive.\n\nThis happens all the time for metadata and it happens for data\nwhen mounted -o ssd. But, the way we record it is fairly racey\nand it tends to fragment the free space over time because we are trying\nto allocate fairly large areas at once.\n\nThis commit gets rid of the races by adding a free space cluster object\nwith dedicated locking to make sure that only one process at a time\nis out replacing the cluster.\n\nThe free space fragmentation is somewhat solved by allowing a cluster\nto be comprised of smaller free space extents. This part definitely\nadds some CPU time to the cluster allocations, but it allows the allocator\nto consume the small holes left behind by cow.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" }, { "commit": "04018de5d41e6490840de9399e029fd30e78576f", "tree": "4fcb979cee830884ca0d3f9636cc70ed17b3364a", "parents": [ "6226cb0a5ea3f6289883753c15d53f48a6c6bbfb" ], "author": { "name": "Josef Bacik", "email": "jbacik@redhat.com", "time": "Fri Apr 03 10:14:18 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Apr 03 10:14:18 2009 -0400" }, "message": "Btrfs: kill the pinned_mutex\n\nThis patch removes the pinned_mutex. The extent io map has an internal tree\nlock that protects the tree itself, and since we only copy the extent io map\nwhen we are committing the transaction we don\u0027t need it there. We also don\u0027t\nneed it when caching the block group since searching through the tree is also\nprotected by the internal map spin lock.\n\nSigned-off-by: Josef Bacik \u003cjbacik@redhat.com\u003e\n\n" }, { "commit": "c226fd659fa7b6a7b038df5ae6856a68514bacde", "tree": "a695689d4d8cdd927400747b94250521eb863686", "parents": [ "c09bca786ff941ed17c5f381c4eca5b106808c51", "d57e62b89796f751c9422801cbcd407a9f8dcdc4" ], "author": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 10:20:44 2009 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Wed Apr 01 10:20:44 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: try to free metadata pages when we free btree blocks\n Btrfs: add extra flushing for renames and truncates\n Btrfs: make sure btrfs_update_delayed_ref doesn\u0027t increase ref_mod\n Btrfs: optimize fsyncs on old files\n Btrfs: tree logging unlink/rename fixes\n Btrfs: Make sure i_nlink doesn\u0027t hit zero too soon during log replay\n Btrfs: limit balancing work while flushing delayed refs\n Btrfs: readahead checksums during btrfs_finish_ordered_io\n Btrfs: leave btree locks spinning more often\n Btrfs: Only let very young transactions grow during commit\n Btrfs: Check for a blocking lock before taking the spin\n Btrfs: reduce stack in cow_file_range\n Btrfs: reduce stalls during transaction commit\n Btrfs: process the delayed reference queue in clusters\n Btrfs: try to cleanup delayed refs while freeing extents\n Btrfs: reduce stack usage in some crucial tree balancing functions\n Btrfs: do extent allocation and reference count updates in the background\n Btrfs: don\u0027t preallocate metadata blocks during btrfs_search_slot\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": "6933c02e9cc47c2df3c016621a013ec79fb4203f", "tree": "d2b711f72c6d1aab317b96ff5040f3fa2ced9ec8", "parents": [ "26160158d3d3df548f4ee046cc6147fe048cfa9c" ], "author": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Tue Mar 17 09:36:37 2009 +0100" }, "committer": { "name": "Jens Axboe", "email": "jens.axboe@oracle.com", "time": "Thu Mar 26 11:01:35 2009 +0100" }, "message": "btrfs: get rid of current_is_pdflush() in btrfs_btree_balance_dirty\n\nChris says it\u0027s safe to kill.\n\nAcked-by: Chris Mason \u003cchris.mason@oracle.com\u003e\nSigned-off-by: Jens Axboe \u003cjens.axboe@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": "c3e69d58e86c3917ae4e9e31b4acf490a7cafe60", "tree": "bd4f1e62446a208bdae26f0c36d67e3afbc1cd1d", "parents": [ "1887be66dcc3140a81d1299958a41fc0eedfa64f" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Mar 13 10:17:05 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Mar 24 16:14:26 2009 -0400" }, "message": "Btrfs: process the delayed reference queue in clusters\n\nThe delayed reference queue maintains pending operations that need to\nbe done to the extent allocation tree. These are processed by\nfinding records in the tree that are not currently being processed one at\na time.\n\nThis is slow because it uses lots of time searching through the rbtree\nand because it creates lock contention on the extent allocation tree\nwhen lots of different procs are running delayed refs at the same time.\n\nThis commit changes things to grab a cluster of refs for processing,\nusing a cursor into the rbtree as the starting point of the next search.\nThis way we walk smoothly through the rbtree.\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": "b9447ef80bd301b932ac4d85c9622e929de5fd62", "tree": "6d0bb1f287ed09f7850b77e2f622c3bebb35112b", "parents": [ "4e06bdd6cbd5105376e7caf4e683ed131e777389" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Mar 09 11:45:38 2009 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Mar 09 11:45:38 2009 -0400" }, "message": "Btrfs: fix spinlock assertions on UP systems\n\nbtrfs_tree_locked was being used to make sure a given extent_buffer was\nproperly locked in a few places. But, it wasn\u0027t correct for UP compiled\nkernels.\n\nThis switches it to using assert_spin_locked instead, and renames it to\nbtrfs_assert_tree_locked to better reflect how it was really being used.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "4008c04a07c73ec3cb1be4c1391d2159a8f75d6d", "tree": "c0b10a7287ac810bfc406541e32b850ad4580248", "parents": [ "3f3420df505e47751ef76a652b5cb660e5360d6f" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Feb 12 14:09:45 2009 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Feb 12 14:09:45 2009 -0500" }, "message": "Btrfs: make a lockdep class for the extent buffer locks\n\nBtrfs is currently using spin_lock_nested with a nested value based\non the tree depth of the block. But, this doesn\u0027t quite work because\nthe max tree depth is bigger than what spin_lock_nested can deal with,\nand because locks are sometimes taken before the level field is filled in.\n\nThe solution here is to use lockdep_set_class_and_name instead, and to\nset the class before unlocking the pages when the block is read from the\ndisk and just after init of a freshly allocated tree block.\n\nbtrfs_clear_path_blocking is also changed to take the locks in the proper\norder, and it also makes sure all the locks currently held are properly\nset to blocking before it tries to retake the spinlocks. Otherwise, lockdep\ngets upset about bad lock orderin.\n\nThe lockdep magic cam from Peter Zijlstra \u003cpeterz@infradead.org\u003e\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "b4ce94de9b4d64e8ab3cf155d13653c666e22b9b", "tree": "ebc44a9554a50b495b091cb0979d79fd29e50fe7", "parents": [ "c487685d7c18a8481900755aa5c56a7a74193101" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Feb 04 09:25:08 2009 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Feb 04 09:25:08 2009 -0500" }, "message": "Btrfs: Change btree locking to use explicit blocking points\n\nMost of the btrfs metadata operations can be protected by a spinlock,\nbut some operations still need to schedule.\n\nSo far, btrfs has been using a mutex along with a trylock loop,\nmost of the time it is able to avoid going for the full mutex, so\nthe trylock loop is a big performance gain.\n\nThis commit is step one for getting rid of the blocking locks entirely.\nbtrfs_tree_lock takes a spinlock, and the code explicitly switches\nto a blocking lock when it starts an operation that can schedule.\n\nWe\u0027ll be able get rid of the blocking locks in smaller pieces over time.\nTracing allows us to find the most common cause of blocking, so we\ncan start with the hot spots first.\n\nThe basic idea is:\n\nbtrfs_tree_lock() returns with the spin lock held\n\nbtrfs_set_lock_blocking() sets the EXTENT_BUFFER_BLOCKING bit in\nthe extent buffer flags, and then drops the spin lock. The buffer is\nstill considered locked by all of the btrfs code.\n\nIf btrfs_tree_lock gets the spinlock but finds the blocking bit set, it drops\nthe spin lock and waits on a wait queue for the blocking bit to go away.\n\nMuch of the code that needs to set the blocking bit finishes without actually\nblocking a good percentage of the time. So, an adaptive spin is still\nused against the blocking bit to avoid very high context switch rates.\n\nbtrfs_clear_lock_blocking() clears the blocking bit and returns\nwith the spinlock held again.\n\nbtrfs_tree_unlock() can be called on either blocking or spinning locks,\nit does the right thing based on the blocking bit.\n\nctree.c has a helper function to set/clear all the locked buffers in a\npath as blocking.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "c487685d7c18a8481900755aa5c56a7a74193101", "tree": "f2ff6c059e24d7fdf2e1fff498bbef0bb90bfbfc", "parents": [ "3935127c50c84106d654ef14962cff28c660bc62" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Feb 04 09:24:25 2009 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Feb 04 09:24:25 2009 -0500" }, "message": "Btrfs: hash_lock is no longer needed\n\nBefore metadata is written to disk, it is updated to reflect that writeout\nhas begun. Once this update is done, the block must be cow\u0027d before it\ncan be modified again.\n\nThis update was originally synchronized by using a per-fs spinlock. Today\nthe buffers for the metadata blocks are locked before writeout begins,\nand everyone that tests the flag has the buffer locked as well.\n\nSo, the per-fs spinlock (called hash_lock for no good reason) is no\nlonger required.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "b51912c91fcf7581cc7b4550f1bb96422809d9ed", "tree": "3738e358e75088d300b289e013beccffe0af8e05", "parents": [ "0279b4cd86685b5eea467c1b74ce94f0add2c0a3" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Feb 04 09:23:24 2009 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Feb 04 09:23:24 2009 -0500" }, "message": "Btrfs: async threads should try harder to find work\n\nTracing shows the delay between when an async thread goes to sleep\nand when more work is added is often very short. This commit adds\na little bit of delay and extra checking to the code right before\nwe schedule out.\n\nIt allows more work to be added to the worker\nwithout requiring notifications from other procs.\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": "7e6628544abad773222d8b177f738ac2db1859de", "tree": "b1bdb87b850ed4639f45b1ca10d739f90e186646", "parents": [ "86288a198d8e4e8411ff02f9ab848245e8f11257" ], "author": { "name": "Qinghuang Feng", "email": "qhfeng.kernel@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: open_ctree() error handling can oops on fs_info\n\na bug in open_ctree:\n\nstruct btrfs_root *open_ctree(..)\n{\n....\n\tif (!extent_root || !tree_root || !fs_info ||\n\t !chunk_root || !dev_root || !csum_root) {\n\t\terr \u003d -ENOMEM;\n\t\tgoto fail;\n//When code flow goes to \"fail\", fs_info may be NULL or uninitialized.\n\t}\n....\n\nfail:\n\tbtrfs_close_devices(fs_info-\u003efs_devices);// !\n\tbtrfs_mapping_tree_free(\u0026fs_info-\u003emapping_tree);// !\n\n\tkfree(extent_root);\n\tkfree(tree_root);\n\tbdi_destroy(\u0026fs_info-\u003ebdi);// !\n...\n)\n\nSigned-off-by: Qinghuang Feng \u003cqhfeng.kernel@gmail.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" }, { "commit": "c6e308713a47527f88a277ee95b7c5d1db80f77b", "tree": "0a890bb3ac2ae1bb8733cf8679d1441e1b85eb81", "parents": [ "57506d50ed6db7b0e7ddc9845e86e81f140983d5" ], "author": { "name": "Qinghuang Feng", "email": "qhfeng.kernel@gmail.com", "time": "Wed Jan 21 10:59:08 2009 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Jan 21 10:59:08 2009 -0500" }, "message": "Btrfs: simplify iteration codes\n\nMerge list_for_each* and list_entry to list_for_each_entry*\n\nSigned-off-by: Qinghuang Feng \u003cqhfeng.kernel@gmail.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" }, { "commit": "57506d50ed6db7b0e7ddc9845e86e81f140983d5", "tree": "a3723a312440c883cde794f78b7cfc5e1dadab77", "parents": [ "119e10cf1b2f6a6cafff74f32373d631489f54c2" ], "author": { "name": "Qinghuang Feng", "email": "qhfeng.kernel@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: check return value for kthread_run() correctly\n\nkthread_run() returns the kthread or ERR_PTR(-ENOMEM), not NULL.\n\nSigned-off-by: Qinghuang Feng \u003cqhfeng.kernel@gmail.com\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@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": "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": "2d69a0f88459fae35df3ddef4934a2dad67e2765", "tree": "20901742766992c0b1a00e56c5c5535daa8be35b", "parents": [ "dd3fd8bdf7238f99561ee236060b04d5b9a84953" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Mon Jan 05 15:43:42 2009 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Jan 05 15:43:42 2009 -0500" }, "message": "Btrfs: avoid potential super block corruption\n\nThe data in fs_info-\u003esuper_for_commit are zeros before the\nfirst transaction commit. If tree log sync and system crash\nboth occur before the first transaction commit, super block\nwill get corrupted.\n\nThis fixes it by properly filling in the super_for_commit field at\nopen time.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "b34b086c1c1d934c5314d46ba25ccfa9acc471ae", "tree": "e95f18b5f64ac96d14189c4a5b12b34fe33b6cda", "parents": [ "1f80e4db0fcb3bdc2be51389baf558a9519682f0" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Dec 19 15:43:22 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Dec 19 15:43:22 2008 -0500" }, "message": "Btrfs: Fix compile warning around num_online_cpus() in a min statement\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "cad321ad529400c6ab24c501a67c3be720a0744c", "tree": "7ac2b81a914329b7ac78b4f2a4275d62484ef45e", "parents": [ "87b29b208c6c38f3446d2de6ece946e2459052cf" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Dec 17 14:51:42 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Dec 17 14:51:42 2008 -0500" }, "message": "Btrfs: shift all end_io work to thread pools\n\nbio_end_io for reads without checksumming on and btree writes were\nhappening without using async thread pools. This means the extent_io.c\ncode had to use spin_lock_irq and friends on the rb tree locks for\nextent state.\n\nThere were some irq safe vs unsafe lock inversions between the delallock\nlock and the extent state locks. This patch gets rid of them by moving\nall end_io code into the thread pools.\n\nTo avoid contention and deadlocks between the data end_io processing and the\nmetadata end_io processing yet another thread pool is added to finish\noff metadata writes.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" }, { "commit": "e4404d6e8da678d852b7f767f665f8edf76c9e9f", "tree": "af6b52e5251d8e939f91e1feab760c1f06021410", "parents": [ "d2fb3437e4d8d12c73c587615ad187d5288547ec" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Fri Dec 12 10:03:26 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Dec 12 10:03:26 2008 -0500" }, "message": "Btrfs: shared seed device\n\nThis patch makes seed device possible to be shared by\nmultiple mounted file systems. The sharing is achieved\nby cloning seed device\u0027s btrfs_fs_devices structure.\nThanks you,\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "0403e47ee26f26e960ee9038552bc89df4a1fb3d", "tree": "08280f23e5cadcf9610f8b80ad1de2c27059aed8", "parents": [ "459931eca5f4b8c9ad259d07cc1ca49afed54804" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Wed Dec 10 20:32:51 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Dec 10 20:32:51 2008 -0500" }, "message": "Btrfs: Add checking of csum tree in balancing code\n\nThis updates the space balancing code for the\nnew checksum format.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "a512bbf855ff0af474257475f2e6da7acd854f52", "tree": "1b2cfcf4152e09f32a6cb0bcbd798d5dab2f5490", "parents": [ "d20f7043fa65659136c1a7c3c456eeeb5c6f431f" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Mon Dec 08 16:46:26 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Dec 08 16:46:26 2008 -0500" }, "message": "Btrfs: superblock duplication\n\nThis patch implements superblock duplication. Superblocks\nare stored at offset 16K, 64M and 256G on every devices.\nSpaces used by superblocks are preserved by the allocator,\nwhich uses a reverse mapping function to find the logical\naddresses that correspond to superblocks. Thank you,\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "d20f7043fa65659136c1a7c3c456eeeb5c6f431f", "tree": "05d1031cadec6d440a97221e3a32adb504a51699", "parents": [ "c99e905c945c462085c6d64646dc5af0c0a16815" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Dec 08 16:58:54 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Dec 08 16:58:54 2008 -0500" }, "message": "Btrfs: move data checksumming into a dedicated tree\n\nBtrfs stores checksums for each data block. Until now, they have\nbeen stored in the subvolume trees, indexed by the inode that is\nreferencing the data block. This means that when we read the inode,\nwe\u0027ve probably read in at least some checksums as well.\n\nBut, this has a few problems:\n\n* The checksums are indexed by logical offset in the file. When\ncompression is on, this means we have to do the expensive checksumming\non the uncompressed data. It would be faster if we could checksum\nthe compressed data instead.\n\n* If we implement encryption, we\u0027ll be checksumming the plain text and\nstoring that on disk. This is significantly less secure.\n\n* For either compression or encryption, we have to get the plain text\nback before we can verify the checksum as correct. This makes the raid\nlayer balancing and extent moving much more expensive.\n\n* It makes the front end caching code more complex, as we have touch\nthe subvolume and inodes as we cache extents.\n\n* There is potentitally one copy of the checksum in each subvolume\nreferencing an extent.\n\nThe solution used here is to store the extent checksums in a dedicated\ntree. This allows us to index the checksums by phyiscal extent\nstart and length. It means:\n\n* The checksum is against the data stored on disk, after any compression\nor encryption is done.\n\n* The checksum is stored in a central location, and can be verified without\nfollowing back references, or reading inodes.\n\nThis makes compression significantly faster by reducing the amount of\ndata that needs to be checksummed. It will also allow much faster\nraid management code in general.\n\nThe checksums are indexed by a key with a fixed objectid (a magic value\nin ctree.h) and offset set to the starting byte of the extent. This\nallows us to copy the checksum items into the fsync log tree directly (or\nany other tree), without having to invent a second format for them.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "607d432da0542e84ddcd358adfddac6f68500e3d", "tree": "44425bf1fe8378022bc1b84425ca4ba9d0176566", "parents": [ "c6e2bac1a52ffc36dd10769b594dfa3994e95f77" ], "author": { "name": "Josef Bacik", "email": "jbacik@redhat.com", "time": "Tue Dec 02 07:17:45 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Dec 02 07:17:45 2008 -0500" }, "message": "Btrfs: add support for multiple csum algorithms\n\nThis patch gives us the space we will need in order to have different csum\nalgorithims at some point in the future. We save the csum algorithim type\nin the superblock, and use those instead of define\u0027s.\n\nSigned-off-by: Josef Bacik \u003cjbacik@redhat.com\u003e\n\n" }, { "commit": "c6e2bac1a52ffc36dd10769b594dfa3994e95f77", "tree": "a48c535515c0d9311fa770afd0696644489cf074", "parents": [ "f2b636e80d8206dd4012de6e973c2367259a7d22" ], "author": { "name": "Josef Bacik", "email": "jbacik@redhat.com", "time": "Tue Dec 02 06:36:10 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Dec 02 06:36:10 2008 -0500" }, "message": "Btrfs: fix panic on error during mount\n\nThis needs to be applied on top of my previous patches, but is needed for more\nthan just my new stuff. We\u0027re going to the wrong label when we have an error,\nwe try to stop the workers, but they are started below all of this code. This\nfixes it so we go to the right error label and not panic when we fail one of\nthese cases.\n\nSigned-off-by: Josef Bacik \u003cjbacik@redhat.com\u003e\n\n" }, { "commit": "f2b636e80d8206dd4012de6e973c2367259a7d22", "tree": "4ed39baca853608bb7b77a6d1061766690cbb32a", "parents": [ "7a865e8ac3a8ead776ea2c8c74fa2b2d00a2c9cf" ], "author": { "name": "Josef Bacik", "email": "jbacik@redhat.com", "time": "Tue Dec 02 06:36:08 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Dec 02 06:36:08 2008 -0500" }, "message": "Btrfs: add support for compat flags to btrfs\n\nThis adds the necessary disk format for handling compatibility flags\nin the future to handle disk format changes. We have a compat_flags,\ncompat_ro_flags and incompat_flags set for the super block. Compat\nflags will be to hold the features that are compatible with older\nversions of btrfs, compat_ro flags have features that are compatible\nwith older versions of btrfs if the fs is mounted read only, and\nincompat_flags has features that are incompatible with older versions\nof btrfs. This also axes the compat_flags field for the inode and\njust makes the flags field a 64bit field, and changes the root item\nflags field to 64bit.\n\nSigned-off-by: Josef Bacik \u003cjbacik@redhat.com\u003e\n\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": "b2950863c61bc24cf0f63bc05947d9d50663c4c0", "tree": "3005a034713fe86db2d64ab1b21fe8762f6a4b0c", "parents": [ "1ffa4f426c002161b7dbd58b297f5d0680e7dd6a" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Tue Dec 02 09:54:17 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Dec 02 09:54:17 2008 -0500" }, "message": "Btrfs: make things static and include the right headers\n\nShut up various sparse warnings about symbols that should be either\nstatic or have their declarations in scope.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\n\n" }, { "commit": "e556ce2c9d2163aea122e91a1512c9a110fece5d", "tree": "a9cc015cdaa47ab42b60525d1a4285cc723a21d7", "parents": [ "4b4e25f2a6ddb070bab7f7dd2bd2926fb8db9e04" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Thu Nov 20 10:25:19 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Nov 20 10:25:19 2008 -0500" }, "message": "Btrfs: Drop dirty roots created by log replay immediately when\n\nThe log replay produces dirty roots. These dirty roots\nshould be dropped immediately if the fs is mounted as\nro. Otherwise they can be added to the dirty root list\nagain when remounting the fs as rw. Thank you,\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "4b4e25f2a6ddb070bab7f7dd2bd2926fb8db9e04", "tree": "b4417e03a187efd6a88da75a41a94020a2bb76ac", "parents": [ "79683f2d685cfb6ef9c97c5194e3ce3319e80cac" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Nov 20 10:22:27 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Nov 20 10:22:27 2008 -0500" }, "message": "Btrfs: compat code fixes\n\nThe btrfs git kernel trees is used to build a standalone tree for\ncompiling against older kernels. This commit makes the standalone tree\nwork with 2.6.27\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "7c2ca4682a2b401cb0c43f96b05eced25eb83eec", "tree": "8c6cf2661f1f15869acdbbf7096bce2e19a1c1e1", "parents": [ "d2c3f4f695edac4d75c1b3eb01a1d16072de63bb" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Nov 19 15:13:35 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Nov 19 15:13:35 2008 -0500" }, "message": "Btrfs: Do fsync log replay when mount -o ro, except when on readonly media\n\nfsync log replay can change the filesystem, so it cannot be delayed until\nmount -o rw,remount, and it can\u0027t be forgotten entirely. So, this patch\nchanges btrfs to do with reiserfs, ext3 and xfs do, which is to do the\nlog replay even when mounted readonly.\n\nOn a readonly device if log replay is required, the mount is aborted.\n\nGetting all of this right had required fixing up some of the error\nhandling in open_ctree.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "d2c3f4f695edac4d75c1b3eb01a1d16072de63bb", "tree": "14a8dd519d067adbe16e8adb7342343529eb5c75", "parents": [ "105d931d482b7d1b1b2dd4b0ea30365db8630b9f" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Nov 19 12:44:22 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Nov 19 12:44:22 2008 -0500" }, "message": "Btrfs: Avoid writeback stalls\n\nWhile building large bios in writepages, btrfs may end up waiting\nfor other page writeback to finish if WB_SYNC_ALL is used.\n\nWhile it is waiting, the bio it is building has a number of pages with the\nwriteback bit set and they aren\u0027t getting to the disk any time soon. This\nlowers the latencies of writeback in general by sending down the bio being\nbuilt before waiting for other pages.\n\nThe bio submission code tries to limit the total number of async bios in\nflight by waiting when we\u0027re over a certain number of async bios. But,\nthe waits are happening while writepages is building bios, and this can easily\nlead to stalls and other problems for people calling wait_on_page_writeback.\n\nThe current fix is to let the congestion tests take care of waiting.\n\nsync() and others make sure to drain the current async requests to make\nsure that everything that was pending when the sync was started really get\nto disk. The code would drain pending requests both before and after\nsubmitting a new request.\n\nBut, if one of the requests is waiting for page writeback to finish,\nthe draining waits might block that page writeback. This changes the\ndraining code to only wait after submitting the bio being processed.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "9f0ba5bd91d42706ba78f97ec638c6a821db1c5e", "tree": "89e6c8e6d6135091ee8f1d072dc5f62506ff67d1", "parents": [ "b4eec2ca1167bae46295aeb66abd15fd52387845" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Nov 18 10:31:22 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Nov 18 10:31:22 2008 -0500" }, "message": "Btrfs: unplug all devices in the unplug call back\n\nFor larger multi-device filesystems, there was logic to limit the\nnumber of devices unplugged to just the page that was sent to our sync_page\nfunction.\n\nBut, the code wasn\u0027t always unplugging the right device. Since this was\njust an optimization, disable it for now.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" }, { "commit": "ea9e8b11bd1252dcbc23afefcf1a52ec6aa3c113", "tree": "3573c8d79e1936e8c921a3be77abda35124e0d78", "parents": [ "0660b5af3f7ac0fac69de975914e1f4a3a586fb3" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Nov 17 21:14:24 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Nov 17 21:14:24 2008 -0500" }, "message": "Btrfs: prevent loops in the directory tree when creating snapshots\n\nFor a directory tree:\n\n/mnt/subvolA/subvolB\n\nbtrfsctl -s /mnt/subvolA/subvolB /mnt\n\nWill create a directory loop with subvolA under subvolB. This\ncommit uses the forward refs for each subvol and snapshot to error out\nbefore creating the loop.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" } ], "next": "3394e1607eaf870ebba37d303fbd590a4c569908" }