Messages in this thread | | | From | Wanpeng Li <> | Date | Mon, 15 Aug 2016 16:53:49 +0800 | Subject | Re: [PATCH] time,virt: resync steal time when guest & host lose sync |
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2016-08-12 23:58 GMT+08:00 Rik van Riel <riel@redhat.com>: [...] > Wanpeng, does the patch below work for you?
It will break steal time for full dynticks guest, and there is a calltrace of thread_group_cputime_adjusted call stack, RIP is cputime_adjust+0xff/0x130.
> > Everybody else, does this patch look acceptable? > > ---8<--- > Subject: time,virt: do not limit steal_account_process_time > > When a guest is interrupted for a longer amount of time, missed clock > ticks are not redelivered later. Because of that, we should not limit
Interesting, so do we need to add a feature like lapic timer interrrupt coalescing in kvm? There is a RTC interrupt coalescing in qemu to handle the scenario you mentioned for windows guest, if we need a similar feature for linux guest? Paolo, Radim? I can try it if you think it's valuable. :)
Regards, Wanpeng Li
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