Commit ef3be457 authored Sep 22, 2011 by Josef Bacik

Btrfs: check unused against how much space we actually want

There is a bug that may lead to early ENOSPC in our reservation code. We've
been checking against num_bytes which may be above and beyond what we want to
actually reserve, which could give us a false ENOSPC. Fix this by making sure
the unused space is above how much we want to reserve and not how much we're
trying to flush. Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>

parent a8c9e576

fs/btrfs/extent-tree.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -3472,7 +3472,7 @@ static int reserve_metadata_bytes(struct btrfs_root *root,
		*/
		if (unused <= space_info->total_bytes) {
		unused = space_info->total_bytes - unused;
		if (unused >= num_bytes) {
		if (unused >= orig_bytes) {
		space_info->bytes_may_use += orig_bytes;
		ret = 0;
		} else {