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Date: Fri, 1 Feb 2008 16:11:43 +0100
From: "Dmitry Adamushko" <dmitry.adamushko@gmail.com>
To: "Peter Zijlstra" <a.p.zijlstra@chello.nl>
Subject: Re: [Regression] 2.6.24-git3: Major annoyance during suspend/hibernation on x86-64 (bisected)
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>, "Ingo Molnar" <mingo@elte.hu>,
       "Steven Rostedt" <srostedt@redhat.com>,
       "Andrew Morton" <akpm@linux-foundation.org>,
       "Linus Torvalds" <torvalds@linux-foundation.org>,
       LKML <linux-kernel@vger.kernel.org>
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On 01/02/2008, Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:

> ---
>  - restore the old wakeup mechanism

and how does it change behavior, logically-wise?

do we somehow miss a 'wake-up' from kthread_stop() so that its caller
gets blocked until watchdog's msleep_interruptible(10000) timeouts? On
average, it would take +-5 sec. and might explain the first
observation of Ravael -- "...adds a 5 - 10 sec delay..." (although,
lately he reported up to +30 sec. delays).

(/me goint to also try reproducing it later today)

> [ ... ]

-- 
Best regards,
Dmitry Adamushko