linux-kernel - Re: [PATCH] sched/cputime: Fix steal time accouting during cpu hotplug

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Date:	Thu, 02 Jun 2016 09:55:03 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Wanpeng Li <kernellwp@...il.com>, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org
Cc:	Wanpeng Li <wanpeng.li@...mail.com>,
	Ingo Molnar <mingo@...nel.org>,
	"Peter Zijlstra (Intel)" <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Paolo Bonzini <pbonzini@...hat.com>, Radim <rkrcmar@...hat.com>
Subject: Re: [PATCH] sched/cputime: Fix steal time accouting during cpu
 hotplug

On Thu, 2016-06-02 at 13:38 +0800, Wanpeng Li wrote:
> From: Wanpeng Li <wanpeng.li@...mail.com>
> 
> I believe rq->prev_irq_time has similar issue. So this patch fix it
> by setting 
> rq->prev_* to current irq time and steal clock timestamp after a cpu
> hotplug 
> comes back.
> 
> Fixes: 'commit e9532e69b8d1 ("sched/cputime: Fix steal time
> accounting vs. CPU hotplug")'
> Cc: Ingo Molnar <mingo@...nel.org>
> Cc: Peter Zijlstra (Intel) <peterz@...radead.org>
> Cc: Rik van Riel <riel@...hat.com>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Frederic Weisbecker <fweisbec@...il.com>
> Cc: Paolo Bonzini <pbonzini@...hat.com>
> Cc: Radim <rkrcmar@...hat.com>
> Signed-off-by: Wanpeng Li <wanpeng.li@...mail.com>
> 

Acked-by: Rik van Riel <riel@...hat.com>

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