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authorChris Mason <chris.mason@oracle.com>2009-02-04 09:33:00 -0500
committerChris Mason <chris.mason@oracle.com>2009-02-04 09:33:00 -0500
commit9b0d3ace33ef225690a86d7130feadb22367f496 (patch)
treeeae45955a38b4d4c2515549112ec749590b56aa9 /fs
parent7b78c170dc4f538cc7ee66f47b3aac3f3974a36c (diff)
downloadlinux-9b0d3ace33ef225690a86d7130feadb22367f496.tar.gz
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>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/extent_io.c5
1 files changed, 0 insertions, 5 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index dd5df53e045..37d43b516b7 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2377,11 +2377,6 @@ static int extent_write_cache_pages(struct extent_io_tree *tree,
int scanned = 0;
int range_whole = 0;
- if (wbc->nonblocking && bdi_write_congested(bdi)) {
- wbc->encountered_congestion = 1;
- return 0;
- }
-
pagevec_init(&pvec, 0);
if (wbc->range_cyclic) {
index = mapping->writeback_index; /* Start from prev offset */