Btrfs: cache extent states in defrag code path

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When locking file ranges in the inode's io_tree, cache the first
extent state that belongs to the target range, so that when unlocking
the range we don't need to search in the io_tree again, reducing cpu
time and making and therefore holding the io_tree's lock for a shorter
period.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Chris Mason <clm@fb.com>

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Filipe Manana 2014-03-11 13:56:15 +00:00 • committed by Chris Mason

parent 3bbb24b20a

commit 308d9800b2

1 changed files with 9 additions and 4 deletions

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fs/btrfs/ioctl.c

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