linux-kernel - Re: [warn_once] warning: at kernel/hrtimer.c:625 hres_timers

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Message-Id: <200904292147.02441.rjw@sisk.pl>
Date:	Wed, 29 Apr 2009 21:47:01 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Alexey Klimov <klimov.linux@...il.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [warn_once] warning: at kernel/hrtimer.c:625 hres_timers_resume+0x24/0x38()

On Wednesday 29 April 2009, Alexey Klimov wrote:
> Hello,
> 
> On Tue, Apr 28, 2009 at 1:35 AM, Rafael J. Wysocki <rjw@...k.pl> wrote:
> > On Sunday 19 April 2009, Alexey Klimov wrote:
> >> Hello all
> >> When testing behaviour of radio-mr800 drvier when doing suspend/resume
> >> to disk, using echo disk > /sys/power/state i have such warning in
> >> dmesg(see below please).
> >> Kernel is 30-rc2, up-to-date. If you need more information, feel free to ask.
> >
> > Can you please retest with the appended patch applied and report back?
> 
> Of course. I applied your patch against up-to-date sources (30-rc3),
> and have more messages after resume:

Thanks!
 
> ACPI: Preparing to enter system sleep state S4
> PM: Saving platform NVS memory
> ------------[ cut here ]------------
> WARNING: at drivers/base/sys.c:405 sysdev_suspend+0xb6/0x21c()
> Hardware name: TravelMate 2350
> Interrupts enabled after cpufreq_suspend+0x0/0x113

Well, it looks like cpufreq_suspend() left us with interrupts enabled and
that caused the other warnings to be printed.  Not nice.

What CPU is there in your box?

Rafael
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