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Date: Fri, 27 May 2011 16:44:46 -0500 From: Chester <somethingsome2000@...il.com> To: Chris Mason <chris.mason@...cle.com> Cc: Linus Torvalds <torvalds@...ux-foundation.org>, linux-btrfs <linux-btrfs@...r.kernel.org>, linux-kernel <linux-kernel@...r.kernel.org> Subject: Re: [GIT PULL] Btrfs updates One question. Will the autodefrag option be snapshot aware? Would enabling this option double the amount of used space if there is a snapshot present? On Fri, May 27, 2011 at 2:55 PM, Chris Mason <chris.mason@...cle.com> wrote: > > Hi everyone, > > I always thought that I'd be retired and with my flying car at the > beach by the time 3.0 came out, but I've setup the for-linus branch of > the btrfs-unstable tree for pulling: > > git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable.git for-linus > > This pull request is probably the biggest I've sent, but it isn't > a code dump into our shiny new .0 rc. The bulk of the changes are > three separate projects that have been going on for 6-8 months: > > A new btrfs inode allocation cache (Li Zefan) > Delayed metadata insertion into the btree (Miao Xe) > Device scrubbing (Arne Jansen) > > On top of that Dave Sterba kicked in a series of code cleanups and Josef > Bacik did some really nice tuning. The short log lists a few other > cleanups and fixes too. > > I coded up a mount -o autodefrag that will detect random writes > into existing files and kick off background defragging. It is well > suited to bdb or sqlite databases, but not virtualization images or big > databases (yet). Once I make sure it doesn't defrag files over and over > again, I'll move this toward the default. > > David Sterba (17) commits (+310/-3253): > btrfs: rename variables clashing with global function names (+53/-53) > btrfs: use printk_ratelimited instead of printk_ratelimit (+10/-24) > btrfs: drop unused parameter from btrfs_release_path (+160/-160) > btrfs: drop unused parameter from extent_map_tree_init (+5/-7) > btrfs: drop unused argument from extent_io_tree_init (+10/-12) > btrfs: remove nested duplicate variable declarations (+0/-4) > btrfs: drop gfp parameter from alloc_extent_buffer (+7/-9) > btrfs: drop gfp parameter from find_extent_buffer (+4/-6) > btrfs: drop gfp parameter from alloc_extent_map (+16/-17) > btrfs: use unsigned type for single bit bitfield (+4/-4) > btrfs: remove old unused commented out code (+1/-2071) > btrfs: Document a mutex lock/unlock sequence (+12/-0) > btrfs: make functions static when possible (+7/-7) > btrfs: unify checking of IS_ERR and null (+17/-17) > btrfs: remove unused function prototypes (+0/-43) > btrfs: remove all unused functions (+1/-817) > btrfs: fix dereference before check (+3/-2) > > Li Zefan (8) commits (+1449/-665): > Btrfs: Make the code for reading/writing free space cache generic (+204/-154) > Btrfs: setup free ino caching in a more asynchronous way (+22/-6) > Btrfs: Support reading/writing on disk free ino cache (+236/-19) > Btrfs: Remove unused btrfs_block_group_free_space() (+0/-16) > Btrfs: Make free space cache code generic (+271/-223) > Btrfs: Cache free inode numbers in memory (+500/-53) > Btrfs: Always use 64bit inode number (+208/-182) > Btrfs: Use bitmap_set/clear() (+8/-12) > > Xiao Guangrong (7) commits (+134/-59): > Btrfs: allocate extent state and check the result properly (+26/-8) > Btrfs: using rcu lock in the reader side of devices list (+72/-36) > Btrfs: fix the race between reading and updating devices (+9/-0) > Btrfs: fix the race between remove dev and alloc chunk (+6/-0) > Btrfs: fix bh leak on __btrfs_open_devices path (+1/-0) > Btrfs: fix unsafe usage of merge_state (+14/-8) > Btrfs: drop unnecessary device lock (+6/-7) > > Arne Jansen (6) commits (+1822/-361): > btrfs scrub: don't coalesce pages that are logically discontiguous (+2/-1) > btrfs: move btrfs_cmp_device_free_bytes to super.c (+26/-28) > btrfs: quasi-round-robin for chunk allocation (+177/-305) > btrfs: add readonly flag (+16/-12) > btrfs: heed alloc_start (+1/-4) > btrfs: scrub (+1600/-11) > > Tsutomu Itoh (5) commits (+43/-36): > Btrfs: BUG_ON is deleted from the caller of btrfs_truncate_item & btrfs_extend_item (+2/-17) > Btrfs: return error code to caller when btrfs_previous_item fails (+3/-2) > Btrfs: return error code to caller when btrfs_del_item fails (+19/-11) > Btrfs: return error to caller if read_one_inode() fails (+18/-6) > Btrfs: check return value of btrfs_inc_extent_ref() (+1/-0) > > Chris Mason (4) commits (+689/-144): > Btrfs: update the delayed inode code to use the btrfs_ino helper. (+7/-6) > Btrfs: use the device_list_mutex during write_dev_supers (+2/-2) > Btrfs: return -ENOMEM in clear_extent_bit (+2/-1) > Btrfs: add mount -o auto_defrag (+678/-135) > > Sergei Trofimovich (3) commits (+7/-3): > btrfs: don't spin in shrink_delalloc if there is nothing to free (+4/-0) > btrfs: fix typo 'testeing' -> 'testing' (+2/-2) > btrfs: typo: 'btrfS' -> 'btrfs' (+1/-1) > > Jan Schmidt (1) commits (+169/-2): > btrfs: new ioctls for scrub > > liubo (1) commits (+3/-0): > Btrfs: do not flush csum items of unchanged file data during treelog > > Miao Xie (1) commits (+2074/-91): > btrfs: implement delayed inode items operation > > Julia Lawall (1) commits (+4/-1): > fs/btrfs: Add missing btrfs_free_path > > Andi Kleen (1) commits (+0/-4): > BTRFS: Remove unused node_lock > > Ilya Dryomov (1) commits (+80/-207): > btrfs scrub: make fixups sync > > Jamey Sharp (1) commits (+0/-43): > btrfs: Delete unused version.sh script. > > Hugo Mills (1) commits (+1/-3): > btrfs: Ensure the tree search ioctl returns the right number of records > > Total: (58) commits > > fs/btrfs/Makefile | 2 +- > fs/btrfs/acl.c | 2 +- > fs/btrfs/btrfs_inode.h | 15 + > fs/btrfs/compression.c | 47 +- > fs/btrfs/compression.h | 2 +- > fs/btrfs/ctree.c | 51 +- > fs/btrfs/ctree.h | 244 +++--- > fs/btrfs/delayed-inode.c | 1695 ++++++++++++++++++++++++++++++++++++ > fs/btrfs/delayed-inode.h | 141 +++ > fs/btrfs/delayed-ref.c | 114 --- > fs/btrfs/delayed-ref.h | 6 - > fs/btrfs/dir-item.c | 39 +- > fs/btrfs/disk-io.c | 210 +++-- > fs/btrfs/disk-io.h | 19 +- > fs/btrfs/export.c | 25 +- > fs/btrfs/extent-tree.c | 2014 ++++--------------------------------------- > fs/btrfs/extent_io.c | 324 ++------ > fs/btrfs/extent_io.h | 40 +- > fs/btrfs/extent_map.c | 8 +- > fs/btrfs/extent_map.h | 4 +- > fs/btrfs/file-item.c | 38 +- > fs/btrfs/file.c | 302 ++++++- > fs/btrfs/free-space-cache.c | 993 +++++++++++++--------- > fs/btrfs/free-space-cache.h | 48 +- > fs/btrfs/inode-item.c | 2 - > fs/btrfs/inode-map.c | 444 ++++++++++- > fs/btrfs/inode-map.h | 13 + > fs/btrfs/inode.c | 700 ++++++--------- > fs/btrfs/ioctl.c | 624 +++++++++++--- > fs/btrfs/ioctl.h | 107 ++- > fs/btrfs/locking.c | 25 - > fs/btrfs/locking.h | 2 - > fs/btrfs/ref-cache.c | 164 ---- > fs/btrfs/ref-cache.h | 24 - > fs/btrfs/relocation.c | 67 +- > fs/btrfs/root-tree.c | 61 +-- > fs/btrfs/scrub.c | 1369 +++++++++++++++++++++++++++++ > fs/btrfs/super.c | 51 +- > fs/btrfs/sysfs.c | 77 -- > fs/btrfs/transaction.c | 196 ++--- > fs/btrfs/transaction.h | 5 +- > fs/btrfs/tree-defrag.c | 2 +- > fs/btrfs/tree-log.c | 208 +++-- > fs/btrfs/tree-log.h | 1 - > fs/btrfs/version.sh | 43 - > fs/btrfs/volumes.c | 657 ++++++--------- > fs/btrfs/volumes.h | 27 +- > fs/btrfs/xattr.c | 12 +- > 48 files changed, 6594 insertions(+), 4670 deletions(-) > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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