Re: [Xen-devel] VMX status report. Xen:25334 & Dom0:568b445...

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2012-05-22 at 08:19 +0100, Ren, Yongjie wrote:
> > -----Original Message-----
> > From: Konrad Rzeszutek Wilk [mailto:konrad.wilk@xxxxxxxxxx]
> > Sent: Monday, May 21, 2012 10:22 PM
> > To: Wu, GabrielX
> > Cc: 'xen-devel@xxxxxxxxxxxxx'; Ren, Yongjie; Liu, SongtaoX; Zhou, Chao
> > Subject: Re: [Xen-devel] VMX status report. Xen:25334 & Dom0:568b445...
> > 
> > On Mon, May 21, 2012 at 03:05:28AM +0000, Wu, GabrielX wrote:
> > > Hi all,
> > >
> > > This is the test report of xen-unstable tree.
> > > There are two issues found and one issue got fixed.
> > >
> > > Version Info:
> > >
> > ============================================================
> > =====
> > > xen-changeset:   25334:f8279258e3c9
> > > Dom0:          linux.git  3.4.0-rc7+ (commit: 568b445...)
> > >
> > ============================================================
> > =====
> > >
> > > New issues(2)
> > > ==============
> > > 1. long stop during the guest boot process with qcow image
> > >   http://bugzilla.xen.org/bugzilla/show_bug.cgi?id=1821
> > > 2. vcpu-set doesn't take effect on guest
> > >   http://bugzilla.xen.org/bugzilla/show_bug.cgi?id=1822
> > 
> > Does it work if you (in the guest) do
> > echo 1 > /sys/../cpu9/online ?
> > 
> The problem is there's no hot-add vCPU in /sys/devices/system/cpu directory.
> e.g. I start a guest with 2 vCPU,

Do you mean with maxvcpu=4 vcpus=2 in your config?

>  then I run command 'xl vcpu-set $domID 4'. 

>     There are only 2 CPUs(cpu0 and cpu1) listed in /sys/devices/system/cpu 
> directory.

The bugzilla says "But it'll effect to dom0.", does this mean that
        xl vcpu-set domU 4
will actually set dom0 to 12 vcpus? Or does it just mean that
        xl vcpu-set 0 4
works where
        xl vcpu-set domU 4
does not?

There's quite a bit of potentially useful info missing from the bug
report, like guest config details, xenstore content etc,
http://wiki.xen.org/wiki/Reporting_Bugs_against_Xen has a list of
various log files which are often useful to help solve bugs, please do
consider including those which seem relevant on future bug reports.

Ian.

> 
> > There is a race in the generic hotplug code.
> 
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