)]}' { "log": [ { "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": "405f55712dfe464b3240d7816cc4fe4174831be2", "tree": "96c425ea7fa8b31058b8f83a433c5e5265c8ebc7", "parents": [ "f9fabcb58a6d26d6efde842d1703ac7cfa9427b6" ], "author": { "name": "Alexey Dobriyan", "email": "adobriyan@gmail.com", "time": "Sat Jul 11 22:08:37 2009 +0400" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Sun Jul 12 12:22:34 2009 -0700" }, "message": "headers: smp_lock.h redux\n\n* Remove smp_lock.h from files which don\u0027t need it (including some headers!)\n* Add smp_lock.h to files which do need it\n* Make smp_lock.h include conditional in hardirq.h\n It\u0027s needed only for one kernel_locked() usage which is under CONFIG_PREEMPT\n\n This will make hardirq.h inclusion cheaper for every PREEMPT\u003dn config\n (which includes allmodconfig/allyesconfig, BTW)\n\nSigned-off-by: Alexey Dobriyan \u003cadobriyan@gmail.com\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "6cbff00f4632c8060b06bfc9585805217f11e12e", "tree": "1886c4c855662172b84be2bfbd2aa5ac6a5c429d", "parents": [ "c289811cc096c57ff35550ee8132793a4f9b5b59" ], "author": { "name": "Christoph Hellwig", "email": "hch@lst.de", "time": "Fri Apr 17 10:37:41 2009 +0200" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Jun 10 11:29:52 2009 -0400" }, "message": "Btrfs: implement FS_IOC_GETFLAGS/SETFLAGS/GETVERSION\n\nAdd support for the standard attributes set via chattr and read via\nlsattr. Currently we store the attributes in the flags value in\nthe btrfs inode, but I wonder whether we should split it into two so\nthat we don\u0027t have to keep converting between the two formats.\n\nRemove the btrfs_clear_flag/btrfs_set_flag/btrfs_test_flag macros\nas they were confusing the existing code and got in the way of the\nnew additions.\n\nAlso add the FS_IOC_GETVERSION ioctl for getting i_generation as it\u0027s\ntrivial.\n\nSigned-off-by: Christoph Hellwig \u003chch@lst.de\u003e\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\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": "17d217fe970d34720f4f1633dca73a6aa2f3d9d1", "tree": "4e2e716400cc45a6697475629f4c046b96ff76e7", "parents": [ "e4404d6e8da678d852b7f767f665f8edf76c9e9f" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Fri Dec 12 10:03:38 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Dec 12 10:03:38 2008 -0500" }, "message": "Btrfs: fix nodatasum handling in balancing code\n\nChecksums on data can be disabled by mount option, so it\u0027s\npossible some data extents don\u0027t have checksums or have\ninvalid checksums. This causes trouble for data relocation.\nThis patch contains following things to make data relocation\nwork.\n\n1) make nodatasum/nodatacow mount option only affects new\nfiles. Checksums and COW on data are only controlled by the\ninode flags.\n\n2) check the existence of checksum in the nodatacow checker.\nIf checksums exist, force COW the data extent. This ensure that\nchecksum for a given block is either valid or does not exist.\n\n3) update data relocation code to properly handle the case\nof checksum missing.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "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": "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": "15916de835a683bd8133a0d1ac0c982b795ab4ff", "tree": "20603c2e0cade00d2e40a3b5390f5def36a02711", "parents": [ "ae20a6afec1cf21919d97303f2d8b737eac5acc7" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Nov 19 21:17:22 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Nov 19 21:17:22 2008 -0500" }, "message": "Btrfs: Fixes for 2.6.28-rc API changes\n\n* open/close_bdev_excl -\u003e open/close_bdev_exclusive\n* blkdev_issue_discard takes a GFP mask now\n* Fix blkdev_issue_discard usage now that it is enabled\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "5b050f04c8ce911c5b6831305a24d70eab95e732", "tree": "ebc7be1f9526a75a8d7ac7a7984c20d728ca96d1", "parents": [ "8247b41ac980d125de8aeba6f33f381056ac0ecb" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Nov 11 09:34:41 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Tue Nov 11 09:34:41 2008 -0500" }, "message": "Btrfs: Fix compile warnings on 32 bit machines\n\nSimple casting here and there to fix things up.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" }, { "commit": "e04ca626baee684bea9d6239e4e1119b696101b2", "tree": "f5327eae3e8393f19ef9f40426efb8b3488f36f6", "parents": [ "ff5b7ee33d82414bf4baf299c21fb703bcc89629" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Nov 10 11:44:58 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Nov 10 11:44:58 2008 -0500" }, "message": "Btrfs: Fix use after free during compressed reads\n\nYan\u0027s fix to use the correct file offset during compressed reads used the\nextent_map struct pointer after it had been freed. This saves the\nfields we want for later use instead.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "ff5b7ee33d82414bf4baf299c21fb703bcc89629", "tree": "926786cf57b375e5ef1f865427c910c3d4bdfc7a", "parents": [ "f2b1c41cf94d7f839fe9ede5f3ead92698a93fb3" ], "author": { "name": "Yan Zheng", "email": "zheng.yan@oracle.com", "time": "Mon Nov 10 07:34:43 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Mon Nov 10 07:34:43 2008 -0500" }, "message": "Btrfs: Fix csum error for compressed data\n\nThe decompress code doesn\u0027t take the logical offset in extent\npointer into account. If the logical offset isn\u0027t zero, data\nwill be decompressed into wrong pages.\n\nThe solution used here is to record the starting offset of the extent\nin the file separately from the logical start of the extent_map struct.\nThis allows us to avoid problems inserting overlapping extents.\n\nSigned-off-by: Yan Zheng \u003czheng.yan@oracle.com\u003e\n\n" }, { "commit": "af09abfece59aa50bfbf16f6f1f85822554e061f", "tree": "ca419511219b433a2bf45626814777df8667a19f", "parents": [ "4366211ccd050e00674b3276b5ed81981b2d7793" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Nov 07 12:35:44 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Nov 07 12:35:44 2008 -0500" }, "message": "Btrfs: make sure compressed bios don\u0027t complete too soon\n\nWhen writing a compressed extent, a number of bios are created that\npoint to a single struct compressed_bio. At end_io time an atomic counter in\nthe compressed_bio struct makes sure that all of the bios have finished\nbefore final end_io processing is done.\n\nBut when multiple bios are needed to write a compressed extent, the\ncounter was being incremented after the first bio was sent to submit_bio.\nIt is possible the bio will complete before the counter is incremented,\nmaking the end_io handler free the compressed_bio struct before\nprocessing is finished.\n\nThe fix is to increment the atomic counter before bio submission,\nboth for compressed reads and writes.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "771ed689d2cd53439e28e095bc38fbe40a71429e", "tree": "518801f7141928e398d40c2b5955720d4346ce1a", "parents": [ "4a69a41009c4ac691f7d9c289f5f37fabeddce46" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Nov 06 22:02:51 2008 -0500" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Nov 06 22:02:51 2008 -0500" }, "message": "Btrfs: Optimize compressed writeback and reads\n\nWhen reading compressed extents, try to put pages into the page cache\nfor any pages covered by the compressed extent that readpages didn\u0027t already\npreload.\n\nAdd an async work queue to handle transformations at delayed allocation processing\ntime. Right now this is just compression. The workflow is:\n\n1) Find offsets in the file marked for delayed allocation\n2) Lock the pages\n3) Lock the state bits\n4) Call the async delalloc code\n\nThe async delalloc code clears the state lock bits and delalloc bits. It is\nimportant this happens before the range goes into the work queue because\notherwise it might deadlock with other work queue items that try to lock\nthose extent bits.\n\nThe file pages are compressed, and if the compression doesn\u0027t work the\npages are written back directly.\n\nAn ordered work queue is used to make sure the inodes are written in the same\norder that pdflush or writepages sent them down.\n\nThis changes extent_write_cache_pages to let the writepage function\nupdate the wbc nr_written count.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" }, { "commit": "70b99e6959a4c28ae1b314985eca731f3db72f1d", "tree": "81578759fe422f7b17a734b8bf16b042aa02a046", "parents": [ "d899e05215178fed903ad0e7fc1cb4d8e0cc0a88" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Oct 31 12:46:39 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Fri Oct 31 12:46:39 2008 -0400" }, "message": "Btrfs: Compression corner fixes\n\nMake sure we keep page-\u003emapping NULL on the pages we\u0027re getting\nvia alloc_page. It gets set so a few of the callbacks can do the right\nthing, but in general these pages don\u0027t have a mapping.\n\nDon\u0027t try to truncate compressed inline items in btrfs_drop_extents.\nThe whole compressed item must be preserved.\n\nDon\u0027t try to create multipage inline compressed items. When we try to\noverwrite just the first page of the file, we would have to read in and recow\nall the pages after it in the same compressed inline items. For now, only\ncreate single page inline items.\n\nMake sure we lock pages in the correct order during delalloc. The\nsearch into the state tree for delalloc bytes can return bytes before\nthe page we already have locked.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n\n" }, { "commit": "cfbc246eaae2a1089911016094b74b3055e8a906", "tree": "c450f02cd605b38a578778dacd9c8768ce041789", "parents": [ "87ef2bb46bfc4be0b40799e68115cbe28d80a1bd" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Oct 30 13:22:14 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Thu Oct 30 13:22:14 2008 -0400" }, "message": "Btrfs: walk compressed pages based on the nr_pages count instead of bytes\n\nThe byte walk counting was awkward and error prone. This uses the\nnumber of pages sent the higher layer to build bios.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" }, { "commit": "c8b978188c9a0fd3d535c13debd19d522b726f1f", "tree": "873628723fb82fe2a7c77adc65fa93eca1d61c0c", "parents": [ "26ce34a9c47334ff7984769e4661b2f1883594ff" ], "author": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Oct 29 14:49:59 2008 -0400" }, "committer": { "name": "Chris Mason", "email": "chris.mason@oracle.com", "time": "Wed Oct 29 14:49:59 2008 -0400" }, "message": "Btrfs: Add zlib compression support\n\nThis is a large change for adding compression on reading and writing,\nboth for inline and regular extents. It does some fairly large\nsurgery to the writeback paths.\n\nCompression is off by default and enabled by mount -o compress. Even\nwhen the -o compress mount option is not used, it is possible to read\ncompressed extents off the disk.\n\nIf compression for a given set of pages fails to make them smaller, the\nfile is flagged to avoid future compression attempts later.\n\n* While finding delalloc extents, the pages are locked before being sent down\nto the delalloc handler. This allows the delalloc handler to do complex things\nsuch as cleaning the pages, marking them writeback and starting IO on their\nbehalf.\n\n* Inline extents are inserted at delalloc time now. This allows us to compress\nthe data before inserting the inline extent, and it allows us to insert\nan inline extent that spans multiple pages.\n\n* All of the in-memory extent representations (extent_map.c, ordered-data.c etc)\nare changed to record both an in-memory size and an on disk size, as well\nas a flag for compression.\n\nFrom a disk format point of view, the extent pointers in the file are changed\nto record the on disk size of a given extent and some encoding flags.\nSpace in the disk format is allocated for compression encoding, as well\nas encryption and a generic \u0027other\u0027 field. Neither the encryption or the\n\u0027other\u0027 field are currently used.\n\nIn order to limit the amount of data read for a single random read in the\nfile, the size of a compressed extent is limited to 128k. This is a\nsoftware only limit, the disk format supports u64 sized compressed extents.\n\nIn order to limit the ram consumed while processing extents, the uncompressed\nsize of a compressed extent is limited to 256k. This is a software only limit\nand will be subject to tuning later.\n\nChecksumming is still done on compressed extents, and it is done on the\nuncompressed version of the data. This way additional encodings can be\nlayered on without having to figure out which encoding to checksum.\n\nCompression happens at delalloc time, which is basically singled threaded because\nit is usually done by a single pdflush thread. This makes it tricky to\nspread the compression load across all the cpus on the box. We\u0027ll have to\nlook at parallel pdflush walks of dirty inodes at a later time.\n\nDecompression is hooked into readpages and it does spread across CPUs nicely.\n\nSigned-off-by: Chris Mason \u003cchris.mason@oracle.com\u003e\n" } ] }