On Mon, 2016-08-15 at 16:53 +0800, Wanpeng Li wrote: > 2016-08-12 23:58 GMT+08:00 Rik van Riel <r...@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.
How? This patch is equivalent to passing ULONG_MAX to steal_account_process_time, which you tried to no ill effect before. Do you have the full call trace? > > 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 -- All Rights Reversed.
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