From: Avi Kivity <avi@redhat.com>
To: Steven Rostedt <srostedt@redhat.com>
Cc: Luis Henriques <henrix@sapo.pt>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@elte.hu>
Subject: Re: [BUG] kvm crashes in 2.6.28-rc6-00007-ged31348
Date: Tue, 02 Dec 2008 22:56:31 +0200 [thread overview]
Message-ID: <4935A0FF.7070105@redhat.com> (raw)
In-Reply-To: <1228250921.4886.14.camel@localhost.localdomain>
Steven Rostedt wrote:
>> In arch/x86/kvm/svm.c, function svm_vcpu_run(), everything between the
>> vmrun instruction and the call to load_host_msrs() is executed without a
>> live pda, so no smp_processor_id(). Could easily be fixed by
>> rearranging things.
>>
>
> That would be best, but if you have trouble, you could surround the
> trouble area with a: tracing_stop(); tracing_start(); That will prevent
> tracing within those locations. The function tracer will still be
> called, but it will exit the function without doing anything else.
>
> Note: that stops tracing on all CPUS, not just the CPU that called it.
>
The vmrun instruction can execute for a long time (hours, if you have a
dyntick kernel and no timers scheduled), so that's less than optimal.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
next prev parent reply other threads:[~2008-12-02 20:58 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-30 19:34 [BUG] kvm crashes in 2.6.28-rc6-00007-ged31348 Luis Henriques
2008-11-30 20:20 ` Avi Kivity
2008-11-30 20:38 ` Luis Henriques
2008-11-30 20:44 ` Avi Kivity
2008-11-30 21:04 ` Luis Henriques
2008-12-02 12:23 ` Avi Kivity
2008-12-02 12:25 ` Avi Kivity
2008-12-02 12:31 ` Avi Kivity
2008-12-02 19:09 ` Luis Henriques
2008-12-02 19:27 ` Avi Kivity
2008-12-02 19:30 ` Avi Kivity
2008-12-02 19:46 ` Luis Henriques
2008-12-02 20:25 ` Steven Rostedt
2008-12-02 20:38 ` Avi Kivity
2008-12-02 20:48 ` Steven Rostedt
2008-12-02 20:56 ` Avi Kivity [this message]
2008-12-04 15:36 ` Avi Kivity
2008-12-04 22:05 ` Luis Henriques
2008-12-02 20:46 ` Luis Henriques
2008-12-02 21:16 ` Steven Rostedt
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