linux-kernel - Re: [RESEND PATCH] staging: tidspbridge: protect dmm

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Date:	Fri, 11 Mar 2011 19:38:57 +0200
From:	Felipe Contreras <felipe.contreras@...il.com>
To:	Felipe Contreras <felipe.contreras@...ia.com>
Cc:	linux-main <linux-kernel@...r.kernel.org>,
	linux-omap <linux-omap@...r.kernel.org>,
	Omar Ramirez Luna <omar.ramirez@...com>,
	Greg KH <greg@...ah.com>, Ohad Ben-Cohen <ohad@...ery.com>,
	Fernando Guzman Lugo <fernando.lugo@...com>,
	Tuomas Kulve <tuomas@...ve.fi>
Subject: Re: [RESEND PATCH] staging: tidspbridge: protect dmm_map properly

On Fri, Mar 11, 2011 at 7:30 PM, Felipe Contreras
<felipe.contreras@...ia.com> wrote:
> We need to protect not only the dmm_map list, but the individual
> map_obj's, otherwise, we might be building the scatter-gather list with
> garbage. So, use the existing proc_lock for that.
>
> I observed race conditions which caused kernel panics while running
> stress tests, also, Tuomas Kulve found it happening quite often in
> Gumstix Over. This patch fixes those.
>
> Cc: Tuomas Kulve <tuomas@...ve.fi>
> Signed-off-by: Felipe Contreras <felipe.contreras@...ia.com>

Omar, 2.6.38 is imminent, if this patch has any chance of getting in,
I think you would need to push it soon.

Cheers.

-- 
Felipe Contreras
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