Re: [Xen-devel] [ANNOUNCE] Third release candidates for 4.0.4 and 4.1.3

["Ren, Yongjie" <yongjie.ren@xxxxxxxxx>]

> -----Original Message-----
> From: Jan Beulich [mailto:JBeulich@xxxxxxxx]
> Sent: Thursday, July 26, 2012 6:39 PM
> To: Ren, Yongjie
> Cc: Ian Campbell; xen-devel@xxxxxxxxxxxxx; Konrad Rzeszutek Wilk; Keir
> (Xen.org)
> Subject: Re: [Xen-devel] [ANNOUNCE] Third release candidates for 4.0.4
> and 4.1.3
> 
> >>> On 26.07.12 at 12:20, "Ren, Yongjie" <yongjie.ren@xxxxxxxxx> wrote:
> >> From: Ian Campbell [mailto:Ian.Campbell@xxxxxxxxxx]
> >> On Thu, 2012-07-26 at 11:04 +0100, Ren, Yongjie wrote:
> >> > I did a testing for 4.1.3-rc3 with Linux 3.4.6 as dom0.
> >> > I met the following 3 issues.
> >> > (1) Can't get deep C-state status via "xenpm" command.
> >> > (2) Can't get P-state info via "xenpm" command.
> >> > (3) HVM S3 resume error.
> >> > No. 1 and No. 2 exists on 4.1.3-rc3, but don't exist on latest
> xen-unstable
> >> tree.
> >> > No. 3 issue exists on both 4.1.3-rc3 and latest xen-unstable tree.
> >>
> >> What was the status of these 3 in 4.1.2? i.e. is this a regression in
> >> the 4.1.x branch or not?
> >>
> > No. 1 and 2 should be a regression, because we have automatic test
> cases to
> > cover the 2 issues.
> 
> This sort of contradicts your own suspicion that 3.4.x may not
> interact well with 4.1.x - is the known working case perhaps
> with some other kernel version used in Dom0 (albeit the support
> for this isn't that old yet in pv-ops)?
> 
Finally, I did a test with an old dom0(2.6.32.57) in the following tree.
git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git
My first suspicion is right. :-)
Issue 1 and 2 (C-state and P-state) can work well with 4.1.3-rc3 and old dom0.
And issue 3 still exists. I think it doesn't block the release of xen 4.1.3.
If using Xen 4.1.3 with Linux 3.4.x dom0, you may meet some small bugs. :-)

Both 4.1.3-rc3 and 4.2-unstable tree have the following issues.
A. HVM S3 issue as I mentioned. 
(I'll file a bug to track this.)
B. a VGA display issue with a SR-IOV hot-plug case
http://bugzilla.xen.org/bugzilla/show_bug.cgi?id=1812



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