linux-kernel - Re: [PATCH] lockdep: fix oops in processing workqueue

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Message-ID: <20120515152952.GA27838@redhat.com>
Date:	Tue, 15 May 2012 11:29:52 -0400
From:	Dave Jones <davej@...hat.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Hugh Dickins <hughd@...gle.com>,
	Ingo Molnar <mingo@...nel.org>, Ingo Molnar <mingo@...hat.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Yong Zhang <yong.zhang0@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] lockdep: fix oops in processing workqueue

On Tue, May 15, 2012 at 08:10:48AM -0700, Tejun Heo wrote:
 > >From 4d82a1debbffec129cc387aafa8f40b7bbab3297 Mon Sep 17 00:00:00 2001
 > From: Peter Zijlstra <peterz@...radead.org>
 > Date: Tue, 15 May 2012 08:06:19 -0700
 > 
 > Under memory load, on x86_64, with lockdep enabled, the workqueue's
 > process_one_work() has been seen to oops in __lock_acquire(), barfing
 > on a 0xffffffff00000000 pointer in the lockdep_map's class_cache[].

can you elaborate what 'memory load' means here ?
I'm curious if I can add something to my fuzzing tool to shake out bugs like this.

	Dave

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