From: Chen Hanxiao <chenhanxiao@xxxxxxxxxxxxxx>
Since 2.6.39, kernel changed the minimum weight of device blkio.
Update related docs.
Signed-off-by: Gao feng <gaofeng@xxxxxxxxxxxxxx>
Signed-off-by: Chen Hanxiao <chenhanxiao@xxxxxxxxxxxxxx>
---
docs/formatdomain.html.in | 6 ++++--
tools/virsh.pod | 11 ++++++-----
2 files changed, 10 insertions(+), 7 deletions(-)
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 3689399..6458567 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -772,7 +772,8 @@
<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,
- 1000].</dd>
+ 1000]. After kernel 2.6.39, the value could be in the
+ range [10, 1000].</dd>
<dt><code>device</code></dt>
<dd>The domain may have multiple <code>device</code> elements
that further tune the weights for each host block device in
@@ -789,7 +790,8 @@
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]. After kernel 2.6.39, the value could be in the
+ range [10, 1000].<span class="since">Since 0.9.8</span></dd>
</dl>
diff --git a/tools/virsh.pod b/tools/virsh.pod
index e12a800..4114ab6 100644
--- a/tools/virsh.pod
+++ b/tools/virsh.pod
@@ -1623,14 +1623,15 @@ Specifying -1 as a value for these limits is interpreted as unlimited.
[I<--live>] | [I<--current>]]
Display or set the blkio parameters. QEMU/KVM supports I<--weight>.
-I<--weight> is in range [100, 1000].
+I<--weight> is in range [100, 1000]. After kernel 2.6.39, the value
+could be in the range [10, 1000].
B<device-weights> is a single string listing one or more device/weight
pairs, in the format of /path/to/device,weight,/path/to/device,weight.
-Each weight is in the range [100, 1000], or the value 0 to remove that
-device from per-device listings. Only the devices listed in the string
-are modified; any existing per-device weights for other devices remain
-unchanged.
+Each weight is in the range [100, 1000], [10, 1000] after kernel 2.6.39,
+or the value 0 to remove that device from per-device listings.
+Only the devices listed in the string are modified;
+any existing per-device weights for other devices remain unchanged.
If I<--live> is specified, affect a running guest.
If I<--config> is specified, affect the next boot of a persistent guest.
--
1.8.2.1
--
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