On Mon, Jan 06, 2014 at 09:18:44AM -0800, Dirk Brandewie wrote:
> On 01/03/2014 02:06 PM, Paolo Bonzini wrote:
> >Il 03/01/2014 21:00, Dirk Brandewie ha scritto:
> >>+case MSR_IA32_MPERF:
> >>+case MSR_IA32_APERF:
> >
> OK I will spin the patch to only add MSR_PLATFORM_INFO.
>
> >These sho
On 01/06/2014 03:37 AM, Rafael J. Wysocki wrote:
On Monday, January 06, 2014 12:20:32 PM Paolo Bonzini wrote:
Il 04/01/2014 22:38, Rafael J. Wysocki ha scritto:
On Saturday, January 04, 2014 07:48:13 PM Gleb Natapov wrote:
On Sat, Jan 04, 2014 at 06:38:59PM +0100, Paolo Bonzini wrote:
Il 04/0
On 01/03/2014 02:06 PM, Paolo Bonzini wrote:
Il 03/01/2014 21:00, Dirk Brandewie ha scritto:
+case MSR_IA32_MPERF:
+case MSR_IA32_APERF:
OK I will spin the patch to only add MSR_PLATFORM_INFO.
These should never be accessed. A KVM VM will always have
CPUID[06H].ECX = 0, and the Int
On Monday, January 06, 2014 12:20:32 PM Paolo Bonzini wrote:
> Il 04/01/2014 22:38, Rafael J. Wysocki ha scritto:
> > On Saturday, January 04, 2014 07:48:13 PM Gleb Natapov wrote:
> >> On Sat, Jan 04, 2014 at 06:38:59PM +0100, Paolo Bonzini wrote:
> >>> Il 04/01/2014 15:38, Rafael J. Wysocki ha scr
Il 04/01/2014 22:38, Rafael J. Wysocki ha scritto:
> On Saturday, January 04, 2014 07:48:13 PM Gleb Natapov wrote:
>> On Sat, Jan 04, 2014 at 06:38:59PM +0100, Paolo Bonzini wrote:
>>> Il 04/01/2014 15:38, Rafael J. Wysocki ha scritto:
Well, it's just a sanity check and it makes the problem go
On Saturday, January 04, 2014 07:48:13 PM Gleb Natapov wrote:
> On Sat, Jan 04, 2014 at 06:38:59PM +0100, Paolo Bonzini wrote:
> > Il 04/01/2014 15:38, Rafael J. Wysocki ha scritto:
> > > Well, it's just a sanity check and it makes the problem go away for the
> > > reporter.
> > >
> > >> > Your p
On Sat, Jan 04, 2014 at 06:38:59PM +0100, Paolo Bonzini wrote:
> Il 04/01/2014 15:38, Rafael J. Wysocki ha scritto:
> > Well, it's just a sanity check and it makes the problem go away for the
> > reporter.
> >
> >> > Your patch is welcome but perhaps it should have a WARN_ON too.
> > It has been
Il 04/01/2014 15:38, Rafael J. Wysocki ha scritto:
> Well, it's just a sanity check and it makes the problem go away for the
> reporter.
>
>> > Your patch is welcome but perhaps it should have a WARN_ON too.
> It has been pulled in already, so the WARN_ON() can only be added via a
> separate
> p
On Saturday, January 04, 2014 09:35:58 AM Paolo Bonzini wrote:
> Il 03/01/2014 23:46, Rafael J. Wysocki ha scritto:
> > Well, fixing the KVM bug is surely welcome.
> >
> > That said, adding checks to ensure that your assumptions are valid is rarely
> > wrong, especially if they are done once per k
Il 03/01/2014 23:46, Rafael J. Wysocki ha scritto:
> Well, fixing the KVM bug is surely welcome.
>
> That said, adding checks to ensure that your assumptions are valid is rarely
> wrong, especially if they are done once per kernel boot. And the kernel only
> should panic if it cannot continue to
On Friday, January 03, 2014 08:04:36 PM Gleb Natapov wrote:
> On Fri, Jan 03, 2014 at 09:30:28AM -0800, Dirk Brandewie wrote:
> > Hi All,
> >
> > Sorry for being late to the party but I just got back from vacation.
> >
> > There is something deeply wrong here. We should have never gotten to
> >
Il 03/01/2014 21:00, Dirk Brandewie ha scritto:
> +case MSR_IA32_MPERF:
> +case MSR_IA32_APERF:
These should never be accessed. A KVM VM will always have
CPUID[06H].ECX = 0, and the Intel manual says that the MSRs are only
present if CPUID returns that value with bit 0 set.
I think the a
On 01/03/2014 10:04 AM, Gleb Natapov wrote:
On Fri, Jan 03, 2014 at 09:30:28AM -0800, Dirk Brandewie wrote:
Hi All,
Sorry for being late to the party but I just got back from vacation.
There is something deeply wrong here. We should have never gotten to
intel_pstate_init_cpu(). The VM had to
On Fri, Jan 03, 2014 at 09:30:28AM -0800, Dirk Brandewie wrote:
> Hi All,
>
> Sorry for being late to the party but I just got back from vacation.
>
> There is something deeply wrong here. We should have never gotten to
> intel_pstate_init_cpu(). The VM had to have returned value from the read
Hi All,
Sorry for being late to the party but I just got back from vacation.
There is something deeply wrong here. We should have never gotten to
intel_pstate_init_cpu(). The VM had to have returned value from the read
of the max pstate at driver init time and 0 when the CPU was being brought
On Monday, December 30, 2013 03:58:43 PM Kashyap Chamarthy wrote:
> On 12/29/2013 04:04 PM, Rafael J. Wysocki wrote:
> > On Sunday, December 29, 2013 01:12:18 PM Kashyap Chamarthy wrote:
> >> [. . .]
> >>
> Here's host dmesg: https://bugzilla.kernel.org/attachment.cgi?id=119751
>
> >>
On 12/29/2013 04:04 PM, Rafael J. Wysocki wrote:
> On Sunday, December 29, 2013 01:12:18 PM Kashyap Chamarthy wrote:
>> [. . .]
>>
Here's host dmesg: https://bugzilla.kernel.org/attachment.cgi?id=119751
>> Can you ftrace the failure?
Can try, need some time (rest of the day
On Sunday, December 29, 2013 01:12:18 PM Kashyap Chamarthy wrote:
> [. . .]
>
> >> Here's host dmesg: https://bugzilla.kernel.org/attachment.cgi?id=119751
> >>
> Can you ftrace the failure?
> >>
> >> Can try, need some time (rest of the day I'll be away travelling,
> >> will try to do it over
[. . .]
>> Here's host dmesg: https://bugzilla.kernel.org/attachment.cgi?id=119751
>>
Can you ftrace the failure?
>>
>> Can try, need some time (rest of the day I'll be away travelling,
>> will try to do it over the weekend, and update the Kernel
>> bugzilla with observations).
>>
>>> Ug
On Friday, December 27, 2013 06:17:47 PM Kashyap Chamarthy wrote:
> On 12/27/2013 06:01 PM, Gleb Natapov wrote:
> > On Fri, Dec 27, 2013 at 06:52:48PM +0200, Gleb Natapov wrote:
> >> On Fri, Dec 27, 2013 at 03:15:39PM +0100, Kashyap Chamarthy wrote:
> >>> [. . .]
> >>>
> > KVM does not emulate
On 12/27/2013 06:01 PM, Gleb Natapov wrote:
> On Fri, Dec 27, 2013 at 06:52:48PM +0200, Gleb Natapov wrote:
>> On Fri, Dec 27, 2013 at 03:15:39PM +0100, Kashyap Chamarthy wrote:
>>> [. . .]
>>>
> KVM does not emulate P-states at all. intel_pstate_init() calls
> intel_pstate_msrs_not_valid()
On Fri, Dec 27, 2013 at 07:01:48PM +0200, Gleb Natapov wrote:
> On Fri, Dec 27, 2013 at 06:52:48PM +0200, Gleb Natapov wrote:
> > On Fri, Dec 27, 2013 at 03:15:39PM +0100, Kashyap Chamarthy wrote:
> > > [. . .]
> > >
> > > >> KVM does not emulate P-states at all. intel_pstate_init() calls
> > > >>
On Fri, Dec 27, 2013 at 06:52:48PM +0200, Gleb Natapov wrote:
> On Fri, Dec 27, 2013 at 03:15:39PM +0100, Kashyap Chamarthy wrote:
> > [. . .]
> >
> > >> KVM does not emulate P-states at all. intel_pstate_init() calls
> > >> intel_pstate_msrs_not_valid() before printing "Intel P-state driver
> > >
On Fri, Dec 27, 2013 at 03:15:39PM +0100, Kashyap Chamarthy wrote:
> [. . .]
>
> >> KVM does not emulate P-states at all. intel_pstate_init() calls
> >> intel_pstate_msrs_not_valid() before printing "Intel P-state driver
> >> initializing." which suppose to fail since it checks that two reads of
Probably the qemu command line is more interesting, which is in this
comment and reproduced below.
https://bugzilla.redhat.com/show_bug.cgi?id=1046317#c1
/usr/bin/qemu-kvm \
-global virtio-blk-pci.scsi=off \
-nodefconfig \
-enable-fips \
-nodefaults \
-display none \
-mach
On Tuesday, December 24, 2013 09:36:01 PM Viresh Kumar wrote:
> Adding Dirk..
>
> On 24 December 2013 20:06, Josh Boyer wrote:
> > Hi All,
> >
> > We've had a report [1] that the pstate driver causes KVM guests to
> > fail to boot because of a divide error. See the backtrace below.
> >
> > 4
[. . .]
>> KVM does not emulate P-states at all. intel_pstate_init() calls
>> intel_pstate_msrs_not_valid() before printing "Intel P-state driver
>> initializing." which suppose to fail since it checks that two reads of
>> MSR_IA32_APERF return different values, but KVM does not emulate this msr
On Fri, Dec 27, 2013 at 7:47 AM, Gleb Natapov wrote:
> On Fri, Dec 27, 2013 at 12:24:22PM +, One Thousand Gnomes wrote:
>> On Tue, 24 Dec 2013 21:36:01 +0530
>> Viresh Kumar wrote:
>>
>> > Adding Dirk..
>> >
>> > On 24 December 2013 20:06, Josh Boyer wrote:
>> > > Hi All,
>> > >
>> > > We've
On Fri, Dec 27, 2013 at 12:24:22PM +, One Thousand Gnomes wrote:
> On Tue, 24 Dec 2013 21:36:01 +0530
> Viresh Kumar wrote:
>
> > Adding Dirk..
> >
> > On 24 December 2013 20:06, Josh Boyer wrote:
> > > Hi All,
> > >
> > > We've had a report [1] that the pstate driver causes KVM guests to
>
On Tue, 24 Dec 2013 21:36:01 +0530
Viresh Kumar wrote:
> Adding Dirk..
>
> On 24 December 2013 20:06, Josh Boyer wrote:
> > Hi All,
> >
> > We've had a report [1] that the pstate driver causes KVM guests to
> > fail to boot because of a divide error. See the backtrace below.
> >
> > 4.8397
Adding Dirk..
On 24 December 2013 20:06, Josh Boyer wrote:
> Hi All,
>
> We've had a report [1] that the pstate driver causes KVM guests to
> fail to boot because of a divide error. See the backtrace below.
>
> 4.839784] Intel P-state driver initializing.
> [4.859972] Intel pstate contro
Hi All,
We've had a report [1] that the pstate driver causes KVM guests to
fail to boot because of a divide error. See the backtrace below.
4.839784] Intel P-state driver initializing.
[4.859972] Intel pstate controlling: cpu 0
[4.867653] cpufreq: __cpufreq_add_dev: ->get() failed
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