linux-kernel - Re: PROBLEM: tickless scheduling

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Date:	Wed, 12 May 2010 13:52:03 -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 Wed, 2010-05-12 at 15:54 -0400, Donald Allen wrote:
> Before doing what you asked, I ran my home-brew backup script, which
> tars up the whole machine, save my home directory, to a big sata drive
> in a usb shoebox. I did so by booting the most recent Arch Linux
> install/live CD (while I use Slackware, the Slackware install CDs are
> not suitable for this sort of thing, having very old versions of
> things like tar). While doing so, I observed exactly the same symptoms
> I did with the Slackware 13.1 install, which I described in the bug
> report. So rather than messing with the hard-won custom kernel that I
> now have installed on the netbook, I am attaching the various things
> from /proc gathered with the Arch kernel running. Yes, it's a somewhat
> older kernel (2.6.30), but I'm hoping that things haven't changed much
> in tickless land. If that's not the case, then I will attempt to
> reproduce this with the newer kernel on the Slackware 13.1 install
> DVD. Let me know if you need me to do this. The attached tar file is
> bzip2-compressed, so you want xjf to extract.

Hmm.. Sorry, but I have another quick request. Could you send
your /proc/interrupts output from the kernel having the problem?

thanks
-john


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