Btrfs: tune btrfs unplug functions for a small number of devices

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When btrfs unplugs, it tries to find the correct device to unplug
via search through the extent_map tree.  This avoids unplugging
a device that doesn't need it, but is a waste of time for filesystems
with a small number of devices.

This patch checks the total number of devices before doing the
search.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

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Chris Mason 2008-11-10 13:08:31 -05:00

parent b47eda8690

commit 240d5d482b

1 changed files with 10 additions and 0 deletions

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fs/btrfs/disk-io.c

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