From: Mel Gorman <mgorman@suse.de>
To: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: lkml <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
dbueso@suse.de
Subject: Re: [patch] futex: Fix v4.6+ ltp futex_wait04 regression
Date: Tue, 7 Jun 2016 12:20:54 +0100 [thread overview]
Message-ID: <20160607112054.GI2469@suse.de> (raw)
In-Reply-To: <20160607105056.GH2469@suse.de>
On Tue, Jun 07, 2016 at 11:50:56AM +0100, Mel Gorman wrote:
> On Mon, Jun 06, 2016 at 11:40:41AM +0200, Mike Galbraith wrote:
> > Hi Mel (who is out of the office today),
> >
>
> Adding Davidlohr who did a lot of the work debugging my initial
> prototype.
>
> > I initially reported this on the rt-users list, thinking at the time
> > that it was only showing up in -rt kernels, but that turned out to not
> > be the case, it just requires an enterprise config for some reason mm
> > folks will likely recognize instantly. I just happen to use same when
> > building devel -rt trees to at least get some build warning coverage.
> >
>
> Can you post the exact config? I used an enterprise config and was unable
> to reproduce the problem on 4.6. I'll be trying 4.7-rc1 after finishing
> this mail even though the optimisation was introduced before 4.6.
>
Never mind, I reproduced the problem and reckon I know where the problem
is. I'll keep poking at it.
--
Mel Gorman
SUSE Labs
prev parent reply other threads:[~2016-06-07 11:20 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-06 9:40 [patch] futex: Fix v4.6+ ltp futex_wait04 regression Mike Galbraith
2016-06-06 13:07 ` Peter Zijlstra
2016-06-06 13:34 ` Mike Galbraith
2016-06-06 13:46 ` Mike Galbraith
2016-06-07 10:50 ` Mel Gorman
2016-06-07 11:20 ` Mel Gorman [this message]
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