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authorChris Mason <chris.mason@oracle.com>2009-08-07 09:59:15 -0400
committerChris Mason <chris.mason@oracle.com>2009-09-11 13:31:05 -0400
commit57fd5a5ff8b48b99e90b22fc143082aba755c6c0 (patch)
tree8744002a9232d25a9ded597fa89c3f1b00ec410c /fs/btrfs/extent_map.c
parenta97adc9fffb1707da4e97f91c801660c6be92aac (diff)
Btrfs: tweak congestion backoff
The btrfs io submission thread tries to back off congested devices in favor of rotating off to another disk. But, it tries to make sure it submits at least some IO before rotating on (the others may be congested too), and so it has a magic number of requests it tries to write before it hops. This makes the magic number smaller. Testing shows that we're spending too much time on congested devices and leaving the other devices idle. Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/extent_map.c')
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