linux-kernel - Re: 2.6.24-rc2-mm1: kcryptd vs lockdep

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Date:	Mon, 19 Nov 2007 08:56:27 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Torsten Kaiser <just.for.lkml@...glemail.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.24-rc2-mm1: kcryptd vs lockdep


* Torsten Kaiser <just.for.lkml@...glemail.com> wrote:

> Trying the last NFSv4 patch (but that patch is only the cause, why I
> had lockdep enabled) I got this:
> [   64.550203]
> [   64.550205] =========================
> [   64.552213] [ BUG: held lock freed! ]
> [   64.553633] -------------------------
> [   64.555055] kcryptd/1022 is freeing memory
> FFFF81011EBEFB00-FFFF81011EBEFB3F, with a lock still held there!

so kcryptd frees a live, still in use bio? That could be a receipe for 
data corruption. Does SLUB_DEBUG (or SLAB_DEBUG) catch anything?

	Ingo
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