3.16.49-rc1 review patch. If anyone has any objections, please let me know.
------------------ From: Liu Bo <[email protected]> commit 28785f70ef882e4798cd5706066a55dbf7adf80e upstream. We commit transaction in order to reclaim space from pinned bytes because it could process delayed refs, and in may_commit_transaction(), we check first if pinned bytes are enough for the required space, we then check if that plus bytes reserved for delayed insert are enough for the required space. This changes the code to the above logic. Fixes: b150a4f10d87 ("Btrfs: use a percpu to keep track of possibly pinned bytes") Tested-by: Nikolay Borisov <[email protected]> Reported-by: Nikolay Borisov <[email protected]> Reviewed-by: Nikolay Borisov <[email protected]> Signed-off-by: Liu Bo <[email protected]> Signed-off-by: David Sterba <[email protected]> Signed-off-by: Ben Hutchings <[email protected]> --- fs/btrfs/extent-tree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -4230,7 +4230,7 @@ static int may_commit_transaction(struct spin_lock(&delayed_rsv->lock); if (percpu_counter_compare(&space_info->total_bytes_pinned, - bytes - delayed_rsv->size) >= 0) { + bytes - delayed_rsv->size) < 0) { spin_unlock(&delayed_rsv->lock); return -ENOSPC; }
