linux-kernel - Re: [RFC][PATCH] sched: Start stopper early

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Message-ID: <20151026152436.754c65b0@holzheu>
Date:	Mon, 26 Oct 2015 15:24:36 +0100
From:	Michael Holzheu <holzheu@...ux.vnet.ibm.com>
To:	Heiko Carstens <heiko.carstens@...ibm.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, Tejun Heo <tj@...nel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Ingo Molnar <mingo@...nel.org>, Rik van Riel <riel@...hat.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Tobias Orlamuende <orlam@...ibm.com>
Subject: Re: [RFC][PATCH] sched: Start stopper early

On Fri, 16 Oct 2015 14:01:25 +0200
Heiko Carstens <heiko.carstens@...ibm.com> wrote:

> On Fri, Oct 16, 2015 at 11:57:06AM +0200, Peter Zijlstra wrote:
> > On Fri, Oct 16, 2015 at 10:22:12AM +0200, Heiko Carstens wrote:
> > > So, actually this doesn't fix the bug and it _seems_ to be reproducible.
> > > 
> > > [ FWIW, I will be offline for the next two weeks ]
> > 
> > So the series from Oleg would be good to try; I can make a git tree for
> > you, or otherwise stuff the lot into a single patch.
> > 
> > Should I be talking to someone else whilst you're having down time?
> 
> Yes Michael Holzheu (on cc), can take care of this.

I tested Peter's "tip/master" and "tip/sched/core". With the following
commit our issue seems to be fixed:

2b621a085a ("stop_machine: Change cpu_stop_queue_two_works() to rely
on stopper->enabled")

When do you plan to merge the patch series in the mainline kernel?

Regards,
Michael

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