| commit | 9b0d3ace33ef225690a86d7130feadb22367f496 | |
| author | Chris Mason <chris.mason@oracle.com> | |
| Wed, 4 Feb 2009 14:33:00 +0000 (4 09:33 -0500) | ||
| committer | Chris Mason <chris.mason@oracle.com> | |
| Wed, 4 Feb 2009 14:33:00 +0000 (4 09:33 -0500) | ||
| tree | eae45955a38b4d4c2515549112ec749590b56aa9 | treesnapshot (tar.gz zip) |
| parent | 7b78c170dc4f538cc7ee66f47b3aac3f3974a36c | commitdiff |
Btrfs: don't return congestion in write_cache_pages as often
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>
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>
| fs/btrfs/extent_io.c | diffblobblamehistory |