[libvirt] [PATCH] doc: blkio: add some notification

If the I/O elevator of disk is not cfq, the setting of blkio.weight is ineffective. And the setting up blkio.weight_device will fail. Add notification for this situation. Signed-off-by: Gao feng <gaofeng(a)cn.fujitsu.com&gt; --- docs/formatdomain.html.in | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index 47d91ab..8d048be 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -740,7 +740,8 @@ <dd> The optional <code>blkiotune</code> element provides the ability to tune Blkio cgroup tunable parameters for the domain. If this is omitted, it defaults to the OS provided - defaults. <span class="since">Since 0.8.8</span></dd> + defaults. Notice: blkiotune is effective only when the I/O elevator + of disk is cfq. <span class="since">Since 0.8.8</span></dd> <dt><code>weight</code></dt> <dd> The optional <code>weight</code> element is the overall I/O weight of the guest. The value should be in the range [100, @@ -761,7 +762,8 @@ mandatory sub-elements, <code>path</code> describing the absolute path of the device, and <code>weight</code> giving the relative weight of that device, in the range [100, - 1000]. <span class="since">Since 0.9.8</span></dd> + 1000]. The setting up device.weight will fail if the I/O elevator + of this disk device is not cfq. <span class="since">Since 0.9.8</span></dd> </dl> -- 1.8.1.4