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authorMax Reitz <mreitz@redhat.com>2018-04-21 15:29:24 +0200
committerMax Reitz <mreitz@redhat.com>2018-05-15 16:15:21 +0200
commit7adcf59fecf3c8ce9330430187350b53f9e50cf7 (patch)
tree437a84387ce17bac679dea75598beb0e5ee04dcb /block/io.c
parentc6035964f8316b504060618d05b5dd434f18595b (diff)
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block: Set BDRV_REQ_WRITE_UNCHANGED for COR writes
Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Message-id: 20180421132929.21610-5-mreitz@redhat.com Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'block/io.c')
-rw-r--r--block/io.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/block/io.c b/block/io.c
index 9e8449e..ca96b48 100644
--- a/block/io.c
+++ b/block/io.c
@@ -1118,13 +1118,15 @@ static int coroutine_fn bdrv_co_do_copy_on_readv(BdrvChild *child,
/* FIXME: Should we (perhaps conditionally) be setting
* BDRV_REQ_MAY_UNMAP, if it will allow for a sparser copy
* that still correctly reads as zero? */
- ret = bdrv_co_do_pwrite_zeroes(bs, cluster_offset, pnum, 0);
+ ret = bdrv_co_do_pwrite_zeroes(bs, cluster_offset, pnum,
+ BDRV_REQ_WRITE_UNCHANGED);
} else {
/* This does not change the data on the disk, it is not
* necessary to flush even in cache=writethrough mode.
*/
ret = bdrv_driver_pwritev(bs, cluster_offset, pnum,
- &local_qiov, 0);
+ &local_qiov,
+ BDRV_REQ_WRITE_UNCHANGED);
}
if (ret < 0) {