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Btrfs: fix return code in drop_objectid_items

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So dpkg fsync()'s the file and the directory containing the file whenever it
writes to a file which is really slow in btrfs.  This is partly because
fsync()'ing a directory _always_ committed the transaction instead of just
going to the tree log.  This is because drop_objectid_items() would return 1
since it does a btrfs_search_slot() which returns 1.  In tree-log jargon
this means that we have to commit the transaction to be safe.  So just check
if ret is greater than 0 and set it to 0 if it does.  With this patch we now
use the tree-log instead of committing the entire transaction, which is
twice as fast on my box.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
This commit is contained in:
Josef Bacik 2012-05-29 16:59:49 -04:00
parent 22ee6985de
commit 5bdbeb2187
1 changed files with 2 additions and 0 deletions
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2
fs/btrfs/tree-log.c
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@ -2667,6 +2667,8 @@ static int drop_objectid_items(struct btrfs_trans_handle *trans,
btrfs_release_path(path);
}
btrfs_release_path(path);
if (ret > 0)
ret = 0;
return ret;
}