tree 5f69342df0c457aca31176234a801bf3607978c5
parent ccf0e72537a9f68611ca575121afd08e2b4d0fb0
author Josef Bacik <josef@redhat.com> 1257906228 -0500
committer Chris Mason <chris.mason@oracle.com> 1257967220 -0500

Btrfs: fallback on uncompressed io if compressed io fails

Currently compressed IO does not deal with not having its entire extent able to
be allocated.  So if we have enough free space to allocate for the extent, but
its not contiguous, it will fail spectacularly.  This patch fixes this by
falling back on uncompressed IO which lets us spread the delalloc extent across
multiple extents.  I tested this by making us randomly think the reservation had
failed to make it fallback on the uncompressed io way and it seemed to work
fine.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>