linux-kernel - Re: regression: fireware causes oops during system

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Message-Id: <200709162216.02448.rjw@sisk.pl>
Date:	Sun, 16 Sep 2007 22:16:01 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Stefan Richter <stefanr@...6.in-berlin.de>,
	Pavel Machek <pavel@....cz>
Cc:	Ben Collins <ben.collins@...ntu.com>,
	kernel list <linux-kernel@...r.kernel.org>,
	linux1394-devel@...ts.sourceforge.net, Ingo Molnar <mingo@...e.hu>
Subject: Re: regression: fireware causes oops during system

On Sunday, 16 September 2007 21:58, Stefan Richter wrote:
> Rafael J. Wysocki wrote:
> >> Pavel Machek wrote:
> >>> commit 831441862956fffa17b9801db37e6ea1650b0f69
> >>> tree b0334921341f8f1734bdd3243de76d676329d21c
> >>> parent 787d2214c19bcc9b6ac48af0ce098277a801eded
> >>> author Rafael J. Wysocki <rjw@...k.pl> Tue, 17 Jul 2007 04:03:35 -0700
> >>> committer Linus Torvalds <torvalds@...dy.linux-foundation.org> Tue, 17
> >>> Jul 2007 10:23:02 -0700
> >>>
> >>>     Freezer: make kernel threads nonfreezable by default
> > 
> > Well, I don't think so.
> > 
> > nodemgr_host_thread() calls set_freezable() as it should.
> 
> This commit is certainly OK, as it should merely preserve status quo.
> Also note that Pavel wrote in his initial post that the problem became
> apparent way after -rc1.  Full quote:
> 
> | I noticed empty suspend stopped working around 2.6.23-rc4, and it is
> | still present in 2.6.23-rc6. To reproduce
> |
> | swapoff -a
> | echo disk > /sys/power/state
> | echo disk > /sys/power/state
> |
> | Unsetting
> |
> | CONFIG_IEEE1394=y
> |
> | solves the problem.

Yes.

I thought that there might be a later change that exposed a bug in it.

Hm.  Pavel, can you do

# echo test > /sys/power/disk
# echo disk > /sys/power/state

and see what happens?

Greetings,
Rafael
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