xfs: plug directory buffer readahead

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Similar to bulkstat inode chunk readahead, we need to plug directory
data buffer readahead during getdents to ensure that we can merge
adjacent readahead requests and sort out of order requests optimally
before they are dispatched. This improves the readahead efficiency
and reduces the IO load it generates as the IO patterns are
significantly better for both contiguous and fragmented directories.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

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Dave Chinner 2013-06-27 16:04:47 +10:00 • committed by Ben Myers

parent cbb2864aa4

commit 34eefc06a0

1 changed files with 3 additions and 0 deletions

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fs/xfs/xfs_dir2_leaf.c

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