Chris Mason 240d5d482b Btrfs: tune btrfs unplug functions for a small number of devices ...

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>

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

57 KiB

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