lkml.org 
[lkml]   [2016]   [Aug]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH] time,virt: resync steal time when guest & host lose sync
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

\
 
 \ /
  Last update: 2016-09-17 09:56    [W:0.760 / U:0.160 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site