[PATCH v2 4/4] docs: documentation for virtio packed option

Reviewed-by: Boris Fiuczynski <fiuczy(a)linux.ibm.com&gt; Signed-off-by: Bjoern Walk <bwalk(a)linux.ibm.com&gt; --- docs/formatdomain.html.in | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index fbffb168..f0252a34 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -4372,6 +4372,16 @@ Possible values are <code>on</code> or <code>off</code>. <span class="since">Since 3.5.0</span> </p> + <p> + The attribute <code>packed</code> controls if QEMU should try to use + packed virtqueues. Compared to regular split queues, packed queues + consist of only a single descriptor ring replacing available and used + ring, index and descriptor buffer. This can result in better cache + utilization and performance. If packed virtqueues are actually used + depends on the feature negotiation between QEMU, vhost backends and guest + drivers. Possible values are <code>on</code> or <code>off</code>. + <span class="since">Since 6.3.0 (QEMU and KVM only)</span> + </p> <h4><a id="elementsVirtioTransitional">Virtio transitional devices</a></h4> -- 2.24.1