linux-kernel - Re: 2.6.39-rc4+: Kernel leaking memory during FS scanning, regression?

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Message-ID: <BANLkTim=D3sHAGyGzzLCL5ZxA71sdDdAiA@mail.gmail.com>
Date:	Thu, 28 Apr 2011 22:41:07 +0200
From:	Sedat Dilek <sedat.dilek@...glemail.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Mike Galbraith <efault@....de>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Bruno Prémont <bonbons@...ux-vserver.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Mike Frysinger <vapier.adi@...il.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org,
	linux-fsdevel@...r.kernel.org,
	"Paul E. McKenney" <paul.mckenney@...aro.org>,
	Pekka Enberg <penberg@...nel.org>
Subject: Re: 2.6.39-rc4+: Kernel leaking memory during FS scanning, regression?

On Thu, Apr 28, 2011 at 8:49 PM, Thomas Gleixner <tglx@...utronix.de> wrote:
> On Thu, 28 Apr 2011, Sedat Dilek wrote:
>> On Thu, Apr 28, 2011 at 3:30 PM, Mike Galbraith <efault@....de> wrote:
>> rt_rq[0]:
>>   .rt_nr_running                 : 0
>>   .rt_throttled                  : 0
>
>>   .rt_time                       : 888.893877
>
>>   .rt_time                       : 950.005460
>
> So rt_time is constantly accumulated, but never decreased. The
> decrease happens in the timer callback. Looks like the timer is not
> running for whatever reason.
>
> Can you add the following patch as well ?
>
> Thanks,
>
>        tglx
>
> --- linux-2.6.orig/kernel/sched.c
> +++ linux-2.6/kernel/sched.c
> @@ -172,7 +172,7 @@ static enum hrtimer_restart sched_rt_per
>                idle = do_sched_rt_period_timer(rt_b, overrun);
>        }
>
> -       return idle ? HRTIMER_NORESTART : HRTIMER_RESTART;
> +       return HRTIMER_RESTART;
>  }
>
>  static
>

See tarball.

- Sedat -

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