Re: [PATCH v2] KVM: trace the events of mmu_notifier

From: Xiao Guangrong
Date: Fri Sep 14 2012 - 02:00:00 EST

On 09/10/2012 05:26 PM, Xiao Guangrong wrote:
> On 09/10/2012 05:09 PM, Avi Kivity wrote:
>> On 09/07/2012 09:16 AM, Xiao Guangrong wrote:
>>> mmu_notifier is the interface to broadcast the mm events to KVM, the
>>> tracepoints introduced in this patch can trace all these events, it is
>>> very helpful for us to notice and fix the bug caused by mm
>> There is nothing kvm specific here. Perhaps this can be made generic
>> (with a mm parameter so we can filter by process).
> Hmm, i would like to put these tracepoints in the mmu-lock then we can clearly
> know the sequence between mm and kvm mmu. It is useful for us to detect the
> issue/race between them.


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