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@xxxxxxxxxx> --- fs/btrfs/tree-log.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 425014b..2017d0f 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -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; } -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
