linux-kernel - Re: s2ram still broken with CONFIG_NO

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Message-Id: <200703121222.25813.rjw@sisk.pl>
Date:	Mon, 12 Mar 2007 12:22:24 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Soeren Sonnenburg <kernel@....de>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Adrian Bunk <bunk@...sta.de>,
	Michal Piotrowski <michal.k.k.piotrowski@...il.com>,
	Emil Karlson <jkarlson@...hut.fi>,
	"Michael S\. Tsirkin" <mst@...lanox.co.il>,
	Len Brown <lenb@...nel.org>, Tejun Heo <htejun@...il.com>
Subject: Re: s2ram still broken with CONFIG_NO_HZ / HPET (macbook pro)

On Sunday, 11 March 2007 21:45, Soeren Sonnenburg wrote:
> (sorry if I am CC'ing the wrong people, seemed for me this is related to
> rc-2 regression 5/6)
> 
> After a very long compile sessions (is there something like git bisect
> to speed this up?) to find the config options that break s2ram between
> my minimalistic and full config I finally have some results:
> 
> As soon as I enable
> 
> CONFIG_TICK_ONESHOT=y
> CONFIG_NO_HZ=y
> 
> s2ram does not anymore return from resume (just hangs).

This probably is related to problems with RCU synchronization.

Please see this thread for reference: http://lkml.org/lkml/2007/3/11/112 .

Greetings,
Rafael
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