[PATCH] docs: formatdomain: Mention the QEMU requirement for discard_no_unref

Signed-off-by: Han Han <hhan(a)redhat.com&gt; --- docs/formatdomain.rst | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst index 973de8dd4f..cd9cb02bf8 100644 --- a/docs/formatdomain.rst +++ b/docs/formatdomain.rst @@ -3296,7 +3296,8 @@ paravirtualized driver is specified via the ``disk`` element. image. When enabled, a discard request from within the guest will mark the qcow2 cluster as zero, but will keep the reference/offset of that cluster. But it will still pass the discard further to the lower layer. - This will resolve fragmentation within the qcow2 image. :since:`Since 9.5.0` + This will resolve fragmentation within the qcow2 image. :since:`Since 9.5.0 + (QEMU 8.1)` In the majority of cases the default configuration used by the hypervisor is sufficient so modifying this setting should not be necessary. For -- 2.41.0