From: Don Dutile <ddutile@redhat.com>
To: "Pasi Kärkkäinen" <pasik@iki.fi>
Cc: "Zhang, Yang Z" <yang.z.zhang@intel.com>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
Ian Jackson <Ian.Jackson@eu.citrix.com>,
Ian Campbell <Ian.Campbell@citrix.com>
Subject: Re: rhel6 guest fail to do save?
Date: Thu, 13 Jan 2011 16:22:36 -0500 [thread overview]
Message-ID: <4D2F6D1C.9070905@redhat.com> (raw)
In-Reply-To: <20110113074726.GM2754@reaktio.net>
Pasi Kärkkäinen wrote:
> On Thu, Jan 13, 2011 at 07:36:02AM +0000, Ian Campbell wrote:
>> On Wed, 2011-01-12 at 17:16 +0000, Ian Jackson wrote:
>>> Zhang, Yang Z writes ("RE: [Xen-devel] rhel6 guest fail to do save?"):
>>>> From: Pasi Kärkkäinen [mailto:pasik@iki.fi]
>>>>> I think people have generally been able to save/restore with rhel6,
>>>>> but there are some issues with live migration between different MHz CPUs,
>>>>> for example: https://bugzilla.redhat.com/show_bug.cgi?id=663755
>>> ...
>>>> Sorry, I mean the HVM.
>>> This is known not to work. It fails in my automatic tests.
>>>
>>> The current RHEL6 kernel has enough pv-on-hvm drivers to get the
>>> toolstack to try to negotiate with the guest during save, but not
>>> enough (or not working enough) drivers to actually complete the
>>> negotiation. So the toolstack times out and the migrate/save fails.
>> Does any of the pv-on-hvm functionality work at all in RHEL6?
>>
>> Perhaps setting "platform_pci = 0" in the guest configuration would work
>> around this issue? In particular if RHEL6 has no useful pv-on-hvm
>> functionality in the first place then nothing is lost.
>>
>
> RHEL6 is supposed to have working PV-on-HVM drivers,
> based on Stefano's patches.
>
> Redhat has tested them with RHEL5 dom0, afaik.
>
Correct. xen-emul-unplug doesn't work, though, due to late
patch that broke that bit of it.
A fair number of upstream patches for pv-hvm & save/restore
have been backported to the next rhel6 update, so hoping this
state of missing pieces in rhel6 pv-on-hvm will be short-lived.
oh, added benefit: the patches should improve rhel6 (pv-on)hvm
on non-RHEL5 dom0's as well.
> -- Pasi
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
next prev parent reply other threads:[~2011-01-13 21:22 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-12 2:15 rhel6 guest fail to do save? Zhang, Yang Z
2011-01-12 7:37 ` Pasi Kärkkäinen
2011-01-12 7:38 ` Zhang, Yang Z
2011-01-12 17:16 ` Ian Jackson
2011-01-12 19:37 ` Pasi Kärkkäinen
2011-01-13 2:03 ` Zhang, Yang Z
2011-01-13 7:36 ` Ian Campbell
2011-01-13 7:47 ` Pasi Kärkkäinen
2011-01-13 21:22 ` Don Dutile [this message]
2011-01-13 21:45 ` Pasi Kärkkäinen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4D2F6D1C.9070905@redhat.com \
--to=ddutile@redhat.com \
--cc=Ian.Campbell@citrix.com \
--cc=Ian.Jackson@eu.citrix.com \
--cc=pasik@iki.fi \
--cc=xen-devel@lists.xensource.com \
--cc=yang.z.zhang@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.