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(parent: 545069a) | patch
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)
commit8279cca74a43b6a432763e396f67456d44f184de
tree0d0a59e05a2e96aa9d6cafb7c7170877b64fb588tree | snapshot
parent545069a512fa0d284e426ff953d990f92996b0b5commit | 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 | history
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