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btrfs: Avoid trucating page or punching hole in a already existed hole.
authorQu Wenruo <quwenruo@cn.fujitsu.com>
Fri, 30 May 2014 07:16:10 +0000 (15:16 +0800)
committerChris Mason <clm@fb.com>
Tue, 10 Jun 2014 00:21:06 +0000 (17:21 -0700)
commitd77815461f047e561f77a07754ae923ade597d4e
tree0d0a59e05a2e96aa9d6cafb7c7170877b64fb588tree | snapshot
parent3821f348889e506efbd268cc8149e0ebfa47c4e5commit | diff
btrfs: Avoid trucating page or punching hole in a already existed hole.

btrfs_punch_hole() will truncate unaligned pages or punch hole on a
already existed hole.
This will cause unneeded zero page or holes splitting the original huge
hole.

This patch will skip already existed holes before any page truncating or
hole punching.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
fs/btrfs/file.c diff | blob | blame | history
Linux kernel - Deliverables
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