From: Dave Jones <davej@redhat.com>
To: Neil Brown <neilb@suse.de>
Cc: x86@kernel.org, cpufreq@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Missing "unregister_cpu_notifier" in powernow-k8.c
Date: Tue, 23 Nov 2010 21:19:38 -0500 [thread overview]
Message-ID: <20101124021938.GB1987@redhat.com> (raw)
In-Reply-To: <20101124112801.78830fba@notabene.brown>
On Wed, Nov 24, 2010 at 11:28:01AM +1100, Neil Brown wrote:
>
> Hi,
> (hope I got the right addressees above....)
>
> I appears that when powernow-k8 find that
>
> No compatible ACPI _PSS objects found.
>
> and suggests
>
> Try again with latest BIOS.
>
> it fails the module load, but does not unregister the cpu_notifier that was
> registered in powernowk8_init
>
> This ends up leaving freed memory on the cpu notifier list for some other
> poor module (e.g. md/raid5) to come along and trip over.
>
> The following might be a partial fix, but I suspect there is probably other
> clean-up that is needed.
>
> ( https://bugzilla.novell.com/show_bug.cgi?id=655215 has full dmesg traces).
Ouch, I'm surprised that took so long to turn up.
I'll merge this up. It should go to stable too.
thanks,
Dave
next prev parent reply other threads:[~2010-11-24 2:20 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-24 0:28 Missing "unregister_cpu_notifier" in powernow-k8.c Neil Brown
2010-11-24 2:19 ` Dave Jones [this message]
2010-11-24 2:31 ` Dave Jones
2010-11-24 9:02 ` Borislav Petkov
2010-11-24 13:13 ` Borislav Petkov
2010-11-24 13:19 ` [PATCH 1/2] x86, powernow-k8: Fixup missing _PSS objects message Borislav Petkov
2010-11-24 13:19 ` [PATCH 2/2] x86, powernow-k8: Fix exit path Borislav Petkov
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