linux-kernel - Re: [PATCH 2/2] slub: Add method to verify memory is not deleted.

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Message-ID: <4E091F2B.4060607@candelatech.com>
Date:	Mon, 27 Jun 2011 17:24:11 -0700
From:	Ben Greear <greearb@...delatech.com>
To:	David Rientjes <rientjes@...gle.com>
CC:	linux-kernel@...r.kernel.org, Pekka Enberg <penberg@...nel.org>,
	Christoph Lameter <cl@...ux.com>
Subject: Re: [PATCH 2/2] slub:  Add method to verify memory is not deleted.

On 06/27/2011 05:19 PM, David Rientjes wrote:
> On Mon, 27 Jun 2011, Ben Greear wrote:
>
>> I saw a case where xprt was 0x6b6b6b6b.  I'm trying to figure out
>> what freed it.
>
> And echo 1>  /sys/kernel/slab/<cache>/store_user doesn't help?

That gives one method, right?  The rpc stuff is freed at the bottom of a
complicated callback chain, and the interesting stuff is what caused the memory
to be freed, not the actually free method.

In previous network (ath9k) hacking I had the same trouble..I think for most
cases you need a full or mostly full stack to make use of the slub
debug logic.

Thanks,
Ben


-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com

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