linux-kernel - Re: [BLOCK] bh: Ensure bh fits within a page

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Message-Id: <20060731210418.084f9f5d.akpm@osdl.org>
Date:	Mon, 31 Jul 2006 21:04:18 -0700
From:	Andrew Morton <akpm@...l.org>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [BLOCK] bh: Ensure bh fits within a page

On Tue, 1 Aug 2006 13:04:43 +1000
Herbert Xu <herbert@...dor.apana.org.au> wrote:

> 
> There is a bug in jbd with slab debugging enabled where it was submitting
> a bh obtained via jbd_rep_kmalloc which crossed a page boundary.  A lot
> of time was spent on tracking this down because the symptoms were far off
> from where the problem was.
> 
> This patch adds a sanity check to submit_bh so we can immediately spot
> anyone doing similar things in future.

Seems sane.

> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
> 
> While you're at it, could you fix that jbd bug for us :)

Could we have a more detailed description?
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