[Xen-changelog] [qemu-xen master] block: Turn on "unmap" in active commit

[patchbot@xxxxxxx]

commit 6f13acf97efb8aade2ff7e0444c15512f9e65812
Author:     Fam Zheng <famz@xxxxxxxxxx>
AuthorDate: Tue Sep 27 19:14:52 2016 +0800
Commit:     Jeff Cody <jcody@xxxxxxxxxx>
CommitDate: Tue Nov 1 07:55:57 2016 -0400

    block: Turn on "unmap" in active commit
    
    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@xxxxxxxxxx>
    Reviewed-by: Eric Blake <eblake@xxxxxxxxxx>
    Message-id: 1474974892-5031-1-git-send-email-famz@xxxxxxxxxx
    Signed-off-by: Jeff Cody <jcody@xxxxxxxxxx>
---
 block/mirror.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/mirror.c b/block/mirror.c
index 7e99f3a..82a9529 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -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);
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#master

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