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| author | Chris Mason <clm@fb.com> | 2014-08-12 10:47:42 -0700 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-08-15 07:43:42 -0700 |
| commit | 8d875f95da43c6a8f18f77869f2ef26e9594fecc (patch) | |
| tree | 601416f676c0e2291bdbed359092eb284f1c32dc /fs/btrfs/ordered-data.h | |
| parent | 27b9a8122ff71a8cadfbffb9c4f0694300464f3b (diff) | |
| download | linux-8d875f95da43c6a8f18f77869f2ef26e9594fecc.tar.gz linux-8d875f95da43c6a8f18f77869f2ef26e9594fecc.tar.bz2 linux-8d875f95da43c6a8f18f77869f2ef26e9594fecc.zip | |
btrfs: disable strict file flushes for renames and truncates
Truncates and renames are often used to replace old versions of a file
with new versions. Applications often expect this to be an atomic
replacement, even if they haven't done anything to make sure the new
version is fully on disk.
Btrfs has strict flushing in place to make sure that renaming over an
old file with a new file will fully flush out the new file before
allowing the transaction commit with the rename to complete.
This ordering means the commit code needs to be able to lock file pages,
and there are a few paths in the filesystem where we will try to end a
transaction with the page lock held. It's rare, but these things can
deadlock.
This patch removes the ordered flushes and switches to a best effort
filemap_flush like ext4 uses. It's not perfect, but it should fix the
deadlocks.
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/ordered-data.h')
| -rw-r--r-- | fs/btrfs/ordered-data.h | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h index 246897058efb..d81a274d621e 100644 --- a/fs/btrfs/ordered-data.h +++ b/fs/btrfs/ordered-data.h @@ -190,11 +190,6 @@ int btrfs_ordered_update_i_size(struct inode *inode, u64 offset, struct btrfs_ordered_extent *ordered); int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr, u32 *sum, int len); -int btrfs_run_ordered_operations(struct btrfs_trans_handle *trans, - struct btrfs_root *root, int wait); -void btrfs_add_ordered_operation(struct btrfs_trans_handle *trans, - struct btrfs_root *root, - struct inode *inode); int btrfs_wait_ordered_extents(struct btrfs_root *root, int nr); void btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, int nr); void btrfs_get_logged_extents(struct inode *inode, |