linux-kernel - Re: PROBLEM: tickless scheduling

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Message-ID: <1273540344.3843.101.camel@localhost.localdomain>
Date:	Mon, 10 May 2010 18:12:24 -0700
From:	john stultz <johnstul@...ibm.com>
To:	Donald Allen <donaldcallen@...il.com>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: PROBLEM: tickless scheduling

On Mon, 2010-05-10 at 20:59 -0400, Donald Allen wrote:
> On Mon, May 10, 2010 at 8:54 PM, john stultz <johnstul@...ibm.com> wrote:
> > On Mon, May 10, 2010 at 5:18 PM, Donald Allen <donaldcallen@...il.com> wrote:
> >> 1. Network file transfers and fscks stop on Toshiba netbook unless
> >> system receives external events
> >
> > Can you provide /proc/timer_list output?
> 
> Attached, but again, this is from the system running with tickless disabled.

Is it possible to boot with the kernel showing the issue and provide the
details?


> > I assume booting with nohz=off from grub resolves the issue?
> 
> Didn't know about the boot-time option (thanks for pointing it out),
> but I wanted to build a custom kernel anyway, so i did so and disabled
> tickless.

Ok. It may still be of value to know booting with nohz=off does avoid
the problem.


thanks
-john

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