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From: Andrew Cooper <andrew.cooper3@citrix.com> To: "Ing. Ricardo Brisighelli" <ricardo@estilo.com.ar>, xen-devel@lists.xen.org Cc: Julien Grall <julien.grall@arm.com> Subject: Re: [Xen-devel] [xl restore and migrating problem - hardware compatibility] Date: Fri, 23 Dec 2016 17:00:31 +0000 Message-ID: <a182bc22-6954-5adb-8872-56bf531eaadc@citrix.com>
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On 23/12/16 16:32, Ing. Ricardo Brisighelli wrote:
> Hi, i'm gentoo user and try with xen 4.6.3 and 4.7.1 in both version have the
> same problem.
>
> My cpu is AMD A10-7860K
This issue has been reported before ("[Xen-devel] "X86_PV_VCPU_MSRS
record truncated" during domain restore").
I submitted patches to fix it ("Fix issues with zero-length records in
migration v2" in July even), which made no progress. As the author of
migration v2, and unfortunately of this bug, I stand by v1 of my fix
without any further modification.
You can find the patches here:
https://xenbits.xen.org/gitweb/?p=people/andrewcoop/xen.git;a=shortlog;h=refs/heads/tools-fix-zero-length-records
Julien: As 4.9 RM, please mark this as a release blocker. It is very
poor that we as a community had this reported and fixed 6 months ago,
and yet it still didn't make it into 4.8
~Andrew
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From: Andrew Cooper <andrew.cooper3@citrix.com> To: "Ing. Ricardo Brisighelli" <ricardo@estilo.com.ar>, xen-devel@lists.xen.org Cc: Julien Grall <julien.grall@arm.com> Subject: Re: [Xen-devel] [xl restore and migrating problem - hardware compatibility] Date: Fri, 23 Dec 2016 17:16:32 +0000 Message-ID: <a0a173e8-fc15-68e9-8e71-46135c8dad6a@citrix.com>
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On 23/12/16 17:00, Andrew Cooper wrote:
> On 23/12/16 16:32, Ing. Ricardo Brisighelli wrote:
>> Hi, i'm gentoo user and try with xen 4.6.3 and 4.7.1 in both version
>> have the
>> same problem.
>>
>> My cpu is AMD A10-7860K
>
> This issue has been reported before ("[Xen-devel] "X86_PV_VCPU_MSRS
> record truncated" during domain restore").
>
> I submitted patches to fix it ("Fix issues with zero-length records in
> migration v2" in July even), which made no progress. As the author of
> migration v2, and unfortunately of this bug, I stand by v1 of my fix
> without any further modification.
>
> You can find the patches here:
> https://xenbits.xen.org/gitweb/?p=people/andrewcoop/xen.git;a=shortlog;h=refs/heads/tools-fix-zero-length-records
If you don't want to take patches, you should be able to work around the
issue by booting Xen with
cpuid_mask_ext_ecx=fbffffff
Specifically, you are looking to hide the DBEXT feature from Xen so it
doesn't choose to insert them into the migration stream to start with.
This migration bug only manifests when the hardware is capable, but the
VM isn't using the feature.
~Andrew
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From: "Ing. Ricardo Brisighelli" <ricardo@estilo.com.ar> To: Andrew Cooper <andrew.cooper3@citrix.com> Cc: xen-devel@lists.xen.org, Julien Grall <julien.grall@arm.com> Subject: Re: [Xen-devel] [xl restore and migrating problem - hardware compatibility] Date: Fri, 23 Dec 2016 19:56:19 -0300 Message-ID: <11067138.3bJAmV3OH1@rick>
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El Vie 23 Dic 2016 17:16:32 Andrew Cooper escribió:
> On 23/12/16 17:00, Andrew Cooper wrote:
> > On 23/12/16 16:32, Ing. Ricardo Brisighelli wrote:
> >> Hi, i'm gentoo user and try with xen 4.6.3 and 4.7.1 in both version
> >> have the
> >> same problem.
> >>
> >> My cpu is AMD A10-7860K
> >
> > This issue has been reported before ("[Xen-devel] "X86_PV_VCPU_MSRS
> > record truncated" during domain restore").
> >
> > I submitted patches to fix it ("Fix issues with zero-length records in
> > migration v2" in July even), which made no progress. As the author of
> > migration v2, and unfortunately of this bug, I stand by v1 of my fix
> > without any further modification.
> >
> > You can find the patches here:
> > https://xenbits.xen.org/gitweb/?p=people/andrewcoop/xen.git;a=shortlog;h=r
> > efs/heads/tools-fix-zero-length-records
> If you don't want to take patches, you should be able to work around the
> issue by booting Xen with
>
> cpuid_mask_ext_ecx=fbffffff
>
> Specifically, you are looking to hide the DBEXT feature from Xen so it
> doesn't choose to insert them into the migration stream to start with.
> This migration bug only manifests when the hardware is capable, but the
> VM isn't using the feature.
>
> ~Andrew
Hi Andrew, first i try boot xen with cpuid_mask_ext_ecx=fbffffff, restore and
migration works well, then try apply the patchs
tools/python: Adjust migration v2 library to warn about...
tools/libxc: Avoid generating inappropriate zero-length...
tools/libxc: Tolerate zero-length records in migration...
remove cpuid_mask, recompile and install xen-4.7.1, reboot and the problem
persist. I'm missing something?
Regards
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From: Andrew Cooper <andrew.cooper3@citrix.com> To: "Ing. Ricardo Brisighelli" <ricardo@estilo.com.ar> Cc: Julien Grall <julien.grall@arm.com>, xen-devel@lists.xen.org Subject: Re: [Xen-devel] [xl restore and migrating problem - hardware compatibility] Date: Fri, 23 Dec 2016 23:22:17 +0000 Message-ID: <1488cbde-b327-82c8-fc5c-4ba717f9fcbb@citrix.com>
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On 23/12/16 22:56, Ing. Ricardo Brisighelli wrote:
> El Vie 23 Dic 2016 17:16:32 Andrew Cooper escribió:
>> On 23/12/16 17:00, Andrew Cooper wrote:
>>> On 23/12/16 16:32, Ing. Ricardo Brisighelli wrote:
>>>> Hi, i'm gentoo user and try with xen 4.6.3 and 4.7.1 in both version
>>>> have the
>>>> same problem.
>>>>
>>>> My cpu is AMD A10-7860K
>>> This issue has been reported before ("[Xen-devel] "X86_PV_VCPU_MSRS
>>> record truncated" during domain restore").
>>>
>>> I submitted patches to fix it ("Fix issues with zero-length records in
>>> migration v2" in July even), which made no progress. As the author of
>>> migration v2, and unfortunately of this bug, I stand by v1 of my fix
>>> without any further modification.
>>>
>>> You can find the patches here:
>>> https://xenbits.xen.org/gitweb/?p=people/andrewcoop/xen.git;a=shortlog;h=r
>>> efs/heads/tools-fix-zero-length-records
>> If you don't want to take patches, you should be able to work around the
>> issue by booting Xen with
>>
>> cpuid_mask_ext_ecx=fbffffff
>>
>> Specifically, you are looking to hide the DBEXT feature from Xen so it
>> doesn't choose to insert them into the migration stream to start with.
>> This migration bug only manifests when the hardware is capable, but the
>> VM isn't using the feature.
>>
>> ~Andrew
> Hi Andrew, first i try boot xen with cpuid_mask_ext_ecx=fbffffff, restore and
> migration works well, then try apply the patchs
>
> tools/python: Adjust migration v2 library to warn about...
> tools/libxc: Avoid generating inappropriate zero-length...
> tools/libxc: Tolerate zero-length records in migration...
>
> remove cpuid_mask, recompile and install xen-4.7.1, reboot and the problem
> persist. I'm missing something?
Does Gentoo split the various parts of Xen apart into sub-packages? This
needs to be the dom0 tools build, not the hypervisor build.
~Andrew
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From: "Ing. Ricardo Brisighelli" <ricardo@estilo.com.ar> To: xen-devel@lists.xen.org Cc: Andrew Cooper <andrew.cooper3@citrix.com>, Julien Grall <julien.grall@arm.com> Subject: Re: [Xen-devel] [xl restore and migrating problem - hardware compatibility] Date: Sat, 24 Dec 2016 10:24:30 -0300 Message-ID: <11963615.l4C2HeH9aP@rick>
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El Vie 23 Dic 2016 23:22:17 Andrew Cooper escribió:
> On 23/12/16 22:56, Ing. Ricardo Brisighelli wrote:
> > El Vie 23 Dic 2016 17:16:32 Andrew Cooper escribió:
> >> On 23/12/16 17:00, Andrew Cooper wrote:
> >>> On 23/12/16 16:32, Ing. Ricardo Brisighelli wrote:
> >>>> Hi, i'm gentoo user and try with xen 4.6.3 and 4.7.1 in both version
> >>>> have the
> >>>> same problem.
> >>>>
> >>>> My cpu is AMD A10-7860K
> >>>
> >>> This issue has been reported before ("[Xen-devel] "X86_PV_VCPU_MSRS
> >>> record truncated" during domain restore").
> >>>
> >>> I submitted patches to fix it ("Fix issues with zero-length records in
> >>> migration v2" in July even), which made no progress. As the author of
> >>> migration v2, and unfortunately of this bug, I stand by v1 of my fix
> >>> without any further modification.
> >>>
> >>> You can find the patches here:
> >>> https://xenbits.xen.org/gitweb/?p=people/andrewcoop/xen.git;a=shortlog;h
> >>> =r
> >>> efs/heads/tools-fix-zero-length-records
> >>
> >> If you don't want to take patches, you should be able to work around the
> >> issue by booting Xen with
> >>
> >> cpuid_mask_ext_ecx=fbffffff
> >>
> >> Specifically, you are looking to hide the DBEXT feature from Xen so it
> >> doesn't choose to insert them into the migration stream to start with.
> >> This migration bug only manifests when the hardware is capable, but the
> >> VM isn't using the feature.
> >>
> >> ~Andrew
> >
> > Hi Andrew, first i try boot xen with cpuid_mask_ext_ecx=fbffffff, restore
> > and migration works well, then try apply the patchs
> >
> > tools/python: Adjust migration v2 library to warn about...
> > tools/libxc: Avoid generating inappropriate zero-length...
> > tools/libxc: Tolerate zero-length records in migration...
> >
> > remove cpuid_mask, recompile and install xen-4.7.1, reboot and the problem
> > persist. I'm missing something?
>
> Does Gentoo split the various parts of Xen apart into sub-packages? This
> needs to be the dom0 tools build, not the hypervisor build.
>
> ~Andrew
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> https://lists.xen.org/xen-devel
>
I recompile xen-tools and all works well.
Thanks very much Andrew
Regards
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From: Doug Goldstein <cardoe@cardoe.com> To: xen-devel@lists.xen.org, "Ing. Ricardo Brisighelli" <ricardo@estilo.com.ar> Cc: Andrew Cooper <andrew.cooper3@citrix.com>, Julien Grall <julien.grall@arm.com> Subject: Re: [Xen-devel] [xl restore and migrating problem - hardware compatibility] Date: Mon, 26 Dec 2016 14:43:03 -0600 Message-ID: <076f39eb-9a89-8b67-b682-95f640e17d70@cardoe.com>
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[Part 1 (text/plain, inline)]
>>>>> This issue has been reported before ("[Xen-devel] "X86_PV_VCPU_MSRS
>>>>> record truncated" during domain restore").
>>>>>
>>>>> I submitted patches to fix it ("Fix issues with zero-length records in
>>>>> migration v2" in July even), which made no progress. As the author of
>>>>> migration v2, and unfortunately of this bug, I stand by v1 of my fix
>>>>> without any further modification.
>>>>>
>>>>> You can find the patches here:
>>>>> https://xenbits.xen.org/gitweb/?p=people/andrewcoop/xen.git;a=shortlog;h
>>>>> =r
>>>>> efs/heads/tools-fix-zero-length-records
>>>>
FWIW, this is fixed in Gentoo now with xen-4.8.0-r1 or xen-4.7.1-r5 and
newer.
https://github.com/gentoo/gentoo/commit/ea2b45715c75943192933e14b58a348027927f2a
--
Doug Goldstein
[signature.asc (application/pgp-signature, attachment)]
[Part 3 (text/plain, inline)]
From: Julien Grall <julien.grall@arm.com> To: Andrew Cooper <andrew.cooper3@citrix.com>, "Ing. Ricardo Brisighelli" <ricardo@estilo.com.ar>, xen-devel@lists.xen.org Cc: Wei Liu <wei.liu2@citrix.com>, Ian Jackson <Ian.Jackson@eu.citrix.com> Subject: Re: [Xen-devel] [xl restore and migrating problem - hardware compatibility] Date: Wed, 28 Dec 2016 14:50:07 +0000 Message-ID: <daef8bbe-4bb2-03c6-4802-492b3b995ec3@arm.com>
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(Adding Ian and Wei)
Hi Andrew,
On 23/12/16 17:00, Andrew Cooper wrote:
> On 23/12/16 16:32, Ing. Ricardo Brisighelli wrote:
>> Hi, i'm gentoo user and try with xen 4.6.3 and 4.7.1 in both version
>> have the
>> same problem.
>>
>> My cpu is AMD A10-7860K
>
> This issue has been reported before ("[Xen-devel] "X86_PV_VCPU_MSRS
> record truncated" during domain restore").
>
> I submitted patches to fix it ("Fix issues with zero-length records in
> migration v2" in July even), which made no progress. As the author of
> migration v2, and unfortunately of this bug, I stand by v1 of my fix
> without any further modification.
>
> You can find the patches here:
> https://xenbits.xen.org/gitweb/?p=people/andrewcoop/xen.git;a=shortlog;h=refs/heads/tools-fix-zero-length-records
>
>
> Julien: As 4.9 RM, please mark this as a release blocker. It is very
> poor that we as a community had this reported and fixed 6 months ago,
> and yet it still didn't make it into 4.8
Sounds sensible. I will create an entry in the bug tracker.
Cheers,
--
Julien Grall
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From: Julien Grall <julien.grall@arm.com> To: Andrew Cooper <andrew.cooper3@citrix.com>, xen-devel@lists.xen.org, "Ing. Ricardo Brisighelli" <ricardo@estilo.com.ar> Subject: Re: [Xen-devel] [xl restore and migrating problem - hardware compatibility] Date: Wed, 28 Dec 2016 14:58:12 +0000 Message-ID: <f61005fa-891a-0ce9-be40-371d4e9fe817@arm.com>
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create ^
severity it blocker
affects it 4.6, 4.7, 4.8
thanks
On 23/12/16 17:00, Andrew Cooper wrote:
> On 23/12/16 16:32, Ing. Ricardo Brisighelli wrote:
>> Hi, i'm gentoo user and try with xen 4.6.3 and 4.7.1 in both version
>> have the
>> same problem.
>>
>> My cpu is AMD A10-7860K
>
> This issue has been reported before ("[Xen-devel] "X86_PV_VCPU_MSRS
> record truncated" during domain restore").
>
> I submitted patches to fix it ("Fix issues with zero-length records in
> migration v2" in July even), which made no progress. As the author of
> migration v2, and unfortunately of this bug, I stand by v1 of my fix
> without any further modification.
>
> You can find the patches here:
> https://xenbits.xen.org/gitweb/?p=people/andrewcoop/xen.git;a=shortlog;h=refs/heads/tools-fix-zero-length-records
>
>
> Julien: As 4.9 RM, please mark this as a release blocker. It is very
> poor that we as a community had this reported and fixed 6 months ago,
> and yet it still didn't make it into 4.8
>
> ~Andrew
--
Julien Grall
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https://lists.xen.org/xen-devel
Control reply; (Full Text)
From: Wei Liu <wei.liu2@citrix.com> To: Julien Grall <julien.grall@arm.com> Cc: Wei Liu <wei.liu2@citrix.com>, xen-devel@lists.xen.org, "Ing. Ricardo Brisighelli" <ricardo@estilo.com.ar>, Andrew Cooper <andrew.cooper3@citrix.com>, Ian Jackson <Ian.Jackson@eu.citrix.com> Subject: Re: [Xen-devel] [xl restore and migrating problem - hardware compatibility] Date: Wed, 4 Jan 2017 11:00:13 +0000 Message-ID: <20170104110013.GF13806@citrix.com>
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On Wed, Dec 28, 2016 at 02:50:07PM +0000, Julien Grall wrote:
> (Adding Ian and Wei)
>
> Hi Andrew,
>
> On 23/12/16 17:00, Andrew Cooper wrote:
> >On 23/12/16 16:32, Ing. Ricardo Brisighelli wrote:
> >>Hi, i'm gentoo user and try with xen 4.6.3 and 4.7.1 in both version
> >>have the
> >>same problem.
> >>
> >>My cpu is AMD A10-7860K
> >
> >This issue has been reported before ("[Xen-devel] "X86_PV_VCPU_MSRS
> >record truncated" during domain restore").
> >
> >I submitted patches to fix it ("Fix issues with zero-length records in
> >migration v2" in July even), which made no progress. As the author of
> >migration v2, and unfortunately of this bug, I stand by v1 of my fix
> >without any further modification.
> >
> >You can find the patches here:
> >https://xenbits.xen.org/gitweb/?p=people/andrewcoop/xen.git;a=shortlog;h=refs/heads/tools-fix-zero-length-records
> >
> >
> >Julien: As 4.9 RM, please mark this as a release blocker. It is very
> >poor that we as a community had this reported and fixed 6 months ago,
> >and yet it still didn't make it into 4.8
>
> Sounds sensible. I will create an entry in the bug tracker.
>
Ian made some comments on the old thread but Andrew didn't reply back.
We should resurrect the discussion there.
Wei.
> Cheers,
>
> --
> Julien Grall
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