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Btrfs: check unused against how much space we actually want

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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>
This commit is contained in:
Josef Bacik 2011-09-22 14:30:02 -04:00
parent a8c9e57697
commit ef3be45722
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/extent-tree.c
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@ -3472,7 +3472,7 @@ again:
*/
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 {