diff options
| author | Max Reitz <mreitz@redhat.com> | 2017-05-04 01:11:18 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2017-05-11 12:08:24 +0200 |
| commit | 564a6b693828ac38f3f562eed9e8b1dc62f45253 (patch) | |
| tree | 466aa3bfb92a455ccb0648dea25659b3563e22df /tpm.c | |
| parent | 92413c16be8eee53a3b60739f2a28a1463651f47 (diff) | |
qcow2: Reuse preallocated zero clusters
Instead of just freeing preallocated zero clusters and completely
allocating them from scratch, reuse them.
We cannot do this in handle_copied(), however, since this is a COW
operation. Therefore, we have to add the new logic to handle_alloc() and
simply return the existing offset if it exists. The only catch is that
we have to convince qcow2_alloc_cluster_link_l2() not to free the old
clusters (because we have reused them).
Reported-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'tpm.c')
0 files changed, 0 insertions, 0 deletions