linux-kernel - Re: broken suspend (sched related) [Was: 2.6.24-rc4-mm1]

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Message-ID: <20071208152447.GA30270@elte.hu>
Date:	Sat, 8 Dec 2007 16:24:47 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>
Subject: Re: broken suspend (sched related) [Was: 2.6.24-rc4-mm1]


* Jiri Slaby <jirislaby@...il.com> wrote:

> On 12/08/2007 09:39 AM, Ingo Molnar wrote:
> > * Jiri Slaby <jirislaby@...il.com> wrote:
> > 
> >> Unfortunately no change here.
> > 
> > could you try to revert this change:
> > 
> > -int softlockup_thresh = 10;
> > +int softlockup_thresh = 60;
> > 
> > i.e. change the value of softlockup_thresh back to 10. You should be 
> > able to tweak this runtime as well, without patching the kernel:
> > 
> >   echo 10 > /proc/sys/kernel/softlockup_thresh
> 
> What should have this changed? I can't see any difference.

it changes the wakeup frequency of the softlockup thread.

i'm wondering why it had no effect now - the new code is in essence a 
NOP over what we had. Could you send me your current (modified) 
kernel/softlockup.c code?

	Ingo
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