Btrfs: don't return congestion in write_cache_pages as often

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On fast devices that go from congested to uncongested very quickly, pdflush
is waiting too often in congestion_wait, and the FS is backing off to
easily in write_cache_pages.

For now, fix this on the btrfs side by only checking congestion after
some bios have already gone down.  Longer term a real fix is needed
for pdflush, but that is a larger project.

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

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This commit is contained in:

Chris Mason 2009-02-04 09:33:00 -05:00

parent 7b78c170dc

commit 9b0d3ace33

1 changed files with 0 additions and 5 deletions

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fs/btrfs/extent_io.c

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