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| author | Mark Fasheh <mfasheh@suse.de> | 2015-06-08 22:05:25 (GMT) |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2015-06-10 14:02:50 (GMT) |
| commit | e1d227a42ea2b4664f94212bd1106b9a3413ffb8 (patch) | |
| tree | e14df0ebdf2241ee848607f06fc39cef6d5c1db4 /lib/decompress_unlzma.c | |
| parent | 070034bdf98544b23a7fcf500618fd31dec06ab2 (diff) | |
| download | linux-e1d227a42ea2b4664f94212bd1106b9a3413ffb8.tar.xz | |
btrfs: Handle unaligned length in extent_same
The extent-same code rejects requests with an unaligned length. This
poses a problem when we want to dedupe the tail extent of files as we
skip cloning the portion between i_size and the extent boundary.
If we don't clone the entire extent, it won't be deleted. So the
combination of these behaviors winds up giving us worst-case dedupe on
many files.
We can fix this by allowing a length that extents to i_size and
internally aligining those to the end of the block. This is what
btrfs_ioctl_clone() so we can just copy that check over.
Signed-off-by: Mark Fasheh <mfasheh@suse.de>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'lib/decompress_unlzma.c')
0 files changed, 0 insertions, 0 deletions