linux-kernel - Re: [PATCH wq#for-linus] workqueue: workqueue_cpu_callback() should be cpu_notifier not hotcpu

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Message-ID: <20100809094630.GA1603@arch.tripp.de>
Date:	Mon, 9 Aug 2010 11:46:30 +0200
From:	Markus Trippelsdorf <markus@...ppelsdorf.de>
To:	Tejun Heo <htejun@...il.com>
Cc:	Heiko Carstens <heiko.carstens@...ibm.com>,
	walt <w41ter@...il.com>, linux-kernel@...r.kernel.org,
	Suresh Siddha <suresh.b.siddha@...el.com>
Subject: Re: [PATCH wq#for-linus] workqueue: workqueue_cpu_callback()
 should be cpu_notifier not hotcpu_notifier

On Mon, Aug 09, 2010 at 11:36:20AM +0200, Tejun Heo wrote:
> Commit 6ee0578b (workqueue: mark init_workqueues as early_initcall)
> made workqueue SMP initialization depend on workqueue_cpu_callback(),
> which however was registered as hotcpu_notifier() and didn't get
> called if CONFIG_HOTPLUG_CPU is not set.  This made gcwqs on non-boot
> CPUs not create their initial workers leading to boot failures.  Fix
> it by making it a cpu_notifier.
> 
> So, something like this.  Can you please verify the fix?

This fixes the boot problem here. Thanks.
(The drm delayed enqueue problem, which I mentioned earlier still
persists.)

-- 
»A man who doesn't know he is in prison can never escape.«
William S. Burroughs
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