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| author | Chris Mason <chris.mason@oracle.com> | 2007-11-27 11:16:35 -0500 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:03:58 -0400 |
| commit | ca6646264b7dab662d84435441164bb2a8e8885a (patch) | |
| tree | 166c8be6d3b941fac96bceaea1db8d4616d7442c /fs/btrfs/disk-io.c | |
| parent | 448d640b668dae3928591e83f2bf4ca9f4c06e52 (diff) | |
| download | lwn-ca6646264b7dab662d84435441164bb2a8e8885a.tar.gz lwn-ca6646264b7dab662d84435441164bb2a8e8885a.zip | |
Btrfs: Add efficient dirty accounting to the extent_map tree
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index de0552532d23..eef4ab56b9ca 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -210,7 +210,7 @@ static int btree_writepages(struct address_space *mapping, { struct extent_map_tree *tree; tree = &BTRFS_I(mapping->host)->extent_tree; - if (wbc->sync_mode == WB_SYNC_NONE && current_is_pdflush()) { + if (wbc->sync_mode == WB_SYNC_NONE) { u64 num_dirty; u64 start = 0; unsigned long thresh = 96 * 1024 * 1024; @@ -218,6 +218,11 @@ static int btree_writepages(struct address_space *mapping, if (wbc->for_kupdate) return 0; + if (current_is_pdflush()) { + thresh = 96 * 1024 * 1024; + } else { + thresh = 8 * 1024 * 1024; + } num_dirty = count_range_bits(tree, &start, thresh, EXTENT_DIRTY); if (num_dirty < thresh) { return 0; |