linux-kernel - Re: spinlock lockup on CPU#0

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Message-ID: <b6c5339f0804261406o447b95b2i18c937a6c738f8db@mail.gmail.com>
Date:	Sat, 26 Apr 2008 17:06:35 -0400
From:	"Bob Copeland" <me@...copeland.com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Justin Mattock" <justinmattock@...il.com>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Venkatesh Pallipadi" <venkatesh.pallipadi@...el.com>
Subject: Re: spinlock lockup on CPU#0

On Sat, Apr 26, 2008 at 3:14 PM, Ingo Molnar <mingo@...e.hu> wrote:
>  > Can you add this please, see if it triggers?
>
>  there's fixes pending in this area. The main fix would be the one below.
>
>         Ingo
>
>  ---------------->
>  Subject: idle (arch, acpi and apm) and lockdep

FWIW, I was seeing the same lockdep trace with eventual hangs, and
this patch (applied with some fuzz) fixed the problem.

-- 
Bob Copeland %% www.bobcopeland.com
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