* (XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c0010000 from 0x0000000000430076 to 0x0000000000030076.
@ 2011-08-14 11:08 Mark Schneider
2011-08-14 13:48 ` Keir Fraser
0 siblings, 1 reply; 6+ messages in thread
From: Mark Schneider @ 2011-08-14 11:08 UTC (permalink / raw)
To: Xen-devel
Hello,
Where can I switch the following message off?
(XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c0010000 from
0x0000000000430076 to 0x0000000000030076.
There are many such messages in the output of "xm dmesg". What is the
reason?
Is it for debugging purposes or just an issue with my hardware? (HP
DL385g7 / AMD CPUs)
Thank you / regards, Mark
--
ms@it-infrastrukturen.org
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: (XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c0010000 from 0x0000000000430076 to 0x0000000000030076.
2011-08-14 11:08 (XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c0010000 from 0x0000000000430076 to 0x0000000000030076 Mark Schneider
@ 2011-08-14 13:48 ` Keir Fraser
2011-08-15 7:40 ` Jan Beulich
0 siblings, 1 reply; 6+ messages in thread
From: Keir Fraser @ 2011-08-14 13:48 UTC (permalink / raw)
To: Mark Schneider, Xen-devel
You can specify guest_loglvl=error to turn off warning messages, but that
would turn off other messages that might actually be interesting.
Alternatively you'd have to disable the message in source code and rebuild
the hypervisor. Possibly we should reduce this message to debug loglevel
rather than warning logelevel: I agree the message is very much not a
rarity.
-- Keir
On 14/08/2011 12:08, "Mark Schneider" <ms@it-infrastrukturen.org> wrote:
> Hello,
>
> Where can I switch the following message off?
> (XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c0010000 from
> 0x0000000000430076 to 0x0000000000030076.
>
> There are many such messages in the output of "xm dmesg". What is the
> reason?
> Is it for debugging purposes or just an issue with my hardware? (HP
> DL385g7 / AMD CPUs)
>
> Thank you / regards, Mark
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: (XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c0010000 from 0x0000000000430076 to 0x0000000000030076.
2011-08-14 13:48 ` Keir Fraser
@ 2011-08-15 7:40 ` Jan Beulich
2011-08-15 12:30 ` Konrad Rzeszutek Wilk
0 siblings, 1 reply; 6+ messages in thread
From: Jan Beulich @ 2011-08-15 7:40 UTC (permalink / raw)
To: Keir Fraser; +Cc: Xen-devel, Mark Schneider
>>> On 14.08.11 at 15:48, Keir Fraser <keir.xen@gmail.com> wrote:
> You can specify guest_loglvl=error to turn off warning messages, but that
> would turn off other messages that might actually be interesting.
> Alternatively you'd have to disable the message in source code and rebuild
> the hypervisor. Possibly we should reduce this message to debug loglevel
> rather than warning logelevel: I agree the message is very much not a
> rarity.
I tend to disagree - the kernel shouldn't really attempt these writes.
One of the things addressing of which is more cumbersome in pv-ops
(which I assume is in use here) than "classic" kernels.
Jan
> On 14/08/2011 12:08, "Mark Schneider" <ms@it-infrastrukturen.org> wrote:
>
>> Hello,
>>
>> Where can I switch the following message off?
>> (XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c0010000 from
>> 0x0000000000430076 to 0x0000000000030076.
>>
>> There are many such messages in the output of "xm dmesg". What is the
>> reason?
>> Is it for debugging purposes or just an issue with my hardware? (HP
>> DL385g7 / AMD CPUs)
>>
>> Thank you / regards, Mark
>
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: (XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c0010000 from 0x0000000000430076 to 0x0000000000030076.
2011-08-15 7:40 ` Jan Beulich
@ 2011-08-15 12:30 ` Konrad Rzeszutek Wilk
2011-08-15 12:45 ` Jan Beulich
0 siblings, 1 reply; 6+ messages in thread
From: Konrad Rzeszutek Wilk @ 2011-08-15 12:30 UTC (permalink / raw)
To: Jan Beulich; +Cc: Xen-devel, Keir Fraser, Mark Schneider
On Mon, Aug 15, 2011 at 08:40:36AM +0100, Jan Beulich wrote:
> >>> On 14.08.11 at 15:48, Keir Fraser <keir.xen@gmail.com> wrote:
> > You can specify guest_loglvl=error to turn off warning messages, but that
> > would turn off other messages that might actually be interesting.
> > Alternatively you'd have to disable the message in source code and rebuild
> > the hypervisor. Possibly we should reduce this message to debug loglevel
> > rather than warning logelevel: I agree the message is very much not a
> > rarity.
>
> I tend to disagree - the kernel shouldn't really attempt these writes.
> One of the things addressing of which is more cumbersome in pv-ops
> (which I assume is in use here) than "classic" kernels.
It might be good to find out what those calls are and see about actually
fixing it.
>
> Jan
>
> > On 14/08/2011 12:08, "Mark Schneider" <ms@it-infrastrukturen.org> wrote:
> >
> >> Hello,
> >>
> >> Where can I switch the following message off?
> >> (XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c0010000 from
> >> 0x0000000000430076 to 0x0000000000030076.
> >>
> >> There are many such messages in the output of "xm dmesg". What is the
> >> reason?
> >> Is it for debugging purposes or just an issue with my hardware? (HP
> >> DL385g7 / AMD CPUs)
> >>
> >> Thank you / regards, Mark
> >
> >
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xensource.com
> > http://lists.xensource.com/xen-devel
>
>
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: (XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c0010000 from 0x0000000000430076 to 0x0000000000030076.
2011-08-15 12:30 ` Konrad Rzeszutek Wilk
@ 2011-08-15 12:45 ` Jan Beulich
2011-08-15 15:20 ` Konrad Rzeszutek Wilk
0 siblings, 1 reply; 6+ messages in thread
From: Jan Beulich @ 2011-08-15 12:45 UTC (permalink / raw)
To: Konrad Rzeszutek Wilk; +Cc: Xen-devel, Keir Fraser, Mark Schneider
>>> On 15.08.11 at 14:30, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> wrote:
> On Mon, Aug 15, 2011 at 08:40:36AM +0100, Jan Beulich wrote:
>> >>> On 14.08.11 at 15:48, Keir Fraser <keir.xen@gmail.com> wrote:
>> > You can specify guest_loglvl=error to turn off warning messages, but that
>> > would turn off other messages that might actually be interesting.
>> > Alternatively you'd have to disable the message in source code and rebuild
>> > the hypervisor. Possibly we should reduce this message to debug loglevel
>> > rather than warning logelevel: I agree the message is very much not a
>> > rarity.
>>
>> I tend to disagree - the kernel shouldn't really attempt these writes.
>> One of the things addressing of which is more cumbersome in pv-ops
>> (which I assume is in use here) than "classic" kernels.
>
> It might be good to find out what those calls are and see about actually
> fixing it.
These are performance monitoring MSRs, and as we seem to agree the
whole perf subsystem is currently not usable with Xen.
Jan
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: (XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c0010000 from 0x0000000000430076 to 0x0000000000030076.
2011-08-15 12:45 ` Jan Beulich
@ 2011-08-15 15:20 ` Konrad Rzeszutek Wilk
0 siblings, 0 replies; 6+ messages in thread
From: Konrad Rzeszutek Wilk @ 2011-08-15 15:20 UTC (permalink / raw)
To: Jan Beulich; +Cc: Xen-devel, Mark Schneider, Keir Fraser
On Mon, Aug 15, 2011 at 01:45:11PM +0100, Jan Beulich wrote:
> >>> On 15.08.11 at 14:30, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> wrote:
> > On Mon, Aug 15, 2011 at 08:40:36AM +0100, Jan Beulich wrote:
> >> >>> On 14.08.11 at 15:48, Keir Fraser <keir.xen@gmail.com> wrote:
> >> > You can specify guest_loglvl=error to turn off warning messages, but that
> >> > would turn off other messages that might actually be interesting.
> >> > Alternatively you'd have to disable the message in source code and rebuild
> >> > the hypervisor. Possibly we should reduce this message to debug loglevel
> >> > rather than warning logelevel: I agree the message is very much not a
> >> > rarity.
> >>
> >> I tend to disagree - the kernel shouldn't really attempt these writes.
> >> One of the things addressing of which is more cumbersome in pv-ops
> >> (which I assume is in use here) than "classic" kernels.
> >
> > It might be good to find out what those calls are and see about actually
> > fixing it.
>
> These are performance monitoring MSRs, and as we seem to agree the
> whole perf subsystem is currently not usable with Xen.
I would like to see it getting usuable with Xen. Not sure if that is just
a "wish" vs a reality. The folks that published the
(http://people.cs.vt.edu/~rnikola/files/vee2011.pdf)
http://lists.xensource.com/archives/html/xen-devel/2011-05/msg01233.html
seemed to have done some work.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2011-08-15 15:20 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2011-08-14 11:08 (XEN) traps.c:2430:d0 Domain attempted WRMSR 00000000c0010000 from 0x0000000000430076 to 0x0000000000030076 Mark Schneider
2011-08-14 13:48 ` Keir Fraser
2011-08-15 7:40 ` Jan Beulich
2011-08-15 12:30 ` Konrad Rzeszutek Wilk
2011-08-15 12:45 ` Jan Beulich
2011-08-15 15:20 ` Konrad Rzeszutek Wilk
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