mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

block: Turn on "unmap" in active commit

Browse Source 
We already specified BDRV_O_UNMAP when opening images in 'qemu-img
commit', but didn't turn on the "unmap" in the active commit job. This
patch fixes that so that zeroed clusters in top image can be discarded
which is desired in the virt-sparsify use case, where a temporary
overlay is created and fstrim'ed before commiting back, to free space in
the original image.

This also enables it for block-commit.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1474974892-5031-1-git-send-email-famz@redhat.com
Signed-off-by: Jeff Cody <jcody@redhat.com>
This commit is contained in:
Fam Zheng 2016-09-27 19:14:52 +08:00 committed by Jeff Cody
parent 6349c15410
commit 6f13acf97e
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
block/mirror.c
View File

@ -1081,7 +1081,7 @@ void commit_active_start(const char *job_id, BlockDriverState *bs,
mirror_start_job(job_id, bs, base, NULL, speed, 0, 0,
MIRROR_LEAVE_BACKING_CHAIN,
on_error, on_error, false, cb, opaque, &local_err,
on_error, on_error, true, cb, opaque, &local_err,
&commit_active_job_driver, false, base, auto_complete);
if (local_err) {
error_propagate(errp, local_err);