linux-kernel - Re: [PATCH 0/3] sched: Fix wakeup preemption regression

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Message-ID: <CAEU1=P=2rmzBjZGQV4-RAJ9k80G08EjKVkroHr5d5LE8N7AS6w@mail.gmail.com>
Date:	Thu, 12 May 2016 15:26:53 +0530
From:	Pavan Kondeti <pkondeti@...eaurora.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
	Pavan Kondeti <pkondeti@...eaurora.org>,
	Ben Segall <bsegall@...gle.com>,
	Matt Fleming <matt@...eblueprint.co.uk>,
	Mike Galbraith <umgwanakikbuti@...il.com>,
	Morten Rasmussen <morten.rasmussen@....com>,
	Paul Turner <pjt@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>, byungchul.park@....com,
	Andrew Hunter <ahh@...gle.com>
Subject: Re: [PATCH 0/3] sched: Fix wakeup preemption regression

Hi Peter,

On Tue, May 10, 2016 at 11:13 PM, Peter Zijlstra <peterz@...radead.org> wrote:
> A recent commit caused an interactivity/starvation issue because we wrecked rq
> local wakeup preemption.
>
> These patches rectify this while also (hopefully) keeping the problem that led
> to the fault patch fixed.
>
> Mike, Pavan, could you guys please confirm?
>
>

I tested with your latest patches. The original problem (migrated
task's vruntime falling
beyond the min_vruntime) is not reproducible.

Thanks,
Pavan

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