linux-kernel - Re: [Suspend2-devel] Re: CFS and suspend2: hang in atomic copy

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Message-Id: <1176947576.5906.21.camel@nigel.suspend2.net>
Date:	Thu, 19 Apr 2007 11:52:56 +1000
From:	Nigel Cunningham <nigel@...el.suspend2.net>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Christian Hesse <mail@...thworm.de>, Nick Piggin <npiggin@...e.de>,
	Mike Galbraith <efault@....de>, linux-kernel@...r.kernel.org,
	Con Kolivas <kernel@...ivas.org>,
	suspend2-devel@...ts.suspend2.net,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [Suspend2-devel] Re: CFS and suspend2: hang in atomic copy

Hi.

On Thu, 2007-04-19 at 00:02 +0200, Ingo Molnar wrote:
> * Christian Hesse <mail@...thworm.de> wrote:
> 
> > > although probably your suspend2 problem is still not fixed, it's 
> > > worth a try nevertheless. Which suspend2 patch did you apply, and 
> > > was it against -rc6 or -rc7?
> > 
> > You are right again. ;-)
> > 
> > Linux 2.6.21-rc7
> > Suspend2 2.2.9.11 (applies cleanly to -rc7)
> > CFS v3 (without any additional patches)
> > 
> > And it still hangs on suspend.
> 
> what's the easiest way for me to try suspend2? Apply the patch, reboot 
> into the kernel, then execute what command to suspend? (there's a 
> confusing mismash of initiators of all the suspend variants. Can i drive 
> this by echoing to /sys/power/state?)

From subsequent emails, I think you already got your answer, but just in
case...

Yes, if you enabled "Replace swsusp by default" and you already had it
set up for getting swsusp to resume. If not, and you're using an
initrd/ramfs, you'll need to modify it to echo
> /sys/power/suspend2/do_resume after /sys and /proc are mounted but
prior to mounting / and so on.

Regards,

Nigel

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