Re: [patch -rt 2/2] KVM: lapic: mark LAPIC timer handler as irqsafe

Paolo Bonzini
2014-12-04T13:53:26Z

On 25/11/2014 21:24, Thomas Gleixner wrote:
> On Tue, 25 Nov 2014, Rik van Riel wrote:
>> On 11/25/2014 12:21 PM, Marcelo Tosatti wrote:
>>> Since lapic timer handler only wakes up a simple waitqueue,
>>> it can be executed from hardirq context.
>>>
>>> Reduces average cyclictest latency by 3us.
>>
>> Can this patch be merged in the KVM tree, and go
>> upstream via Paolo?
>
> Not really as it has RT dependencies ....

Can hrtimer_start_expires even return ETIME on a non-RT kernel? If yes,
I can take patch 2. If not, it's better to keep both patches in the RT
tree.

Paolo