linux-kernel - Re: [PATCH 1/1] sched/cputime: do not decrease steal time after live migration on xen

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Date:   Tue, 10 Oct 2017 13:58:54 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Dongli Zhang <dongli.zhang@...cle.com>
Cc:     linux-kernel@...r.kernel.org, xen-devel@...ts.xen.org,
        mingo@...hat.com, dario.faggioli@...rix.com, bevan@...co.net,
        xen.list@...vel.fr, joao.m.martins@...cle.com
Subject: Re: [PATCH 1/1] sched/cputime: do not decrease steal time after live
 migration on xen

On Tue, Oct 10, 2017 at 05:14:08PM +0800, Dongli Zhang wrote:
> After guest live migration on xen, steal time in /proc/stat
> (cpustat[CPUTIME_STEAL]) might decrease because steal returned by
> paravirt_steal_clock() might be less than this_rq()->prev_steal_time.

So why not fix paravirt_steal_clock() to not be broken?