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Btrfs: don't call btrfs_throttle in file write 

Btrfs_throttle will make us wait if there is a currently committing transaction
until we can open new transactions, which is ridiculous since we don't actually
start any transactions within the file write path anyway, so all this does is
introduce big latencies if we have a sync/fsync heavy workload going on while
somebody else is trying to do work.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Josef Bacik 2012-01-12 19:10:12 -05:00 committed by Chris Mason
parent ec39e180fd
commit 45a8090e62
1 changed files with 0 additions and 1 deletions
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fs/btrfs/file.c
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@ -1273,7 +1273,6 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
dirty_pages); dirty_pages);
if (dirty_pages < (root->leafsize >> PAGE_CACHE_SHIFT) + 1) if (dirty_pages < (root->leafsize >> PAGE_CACHE_SHIFT) + 1)
btrfs_btree_balance_dirty(root, 1); btrfs_btree_balance_dirty(root, 1);
btrfs_throttle(root);
pos += copied; pos += copied;
num_written += copied; num_written += copied;