linux-kernel - Re: [PATCH 1/4] mm: cma: Don't crash on allocation if CMA area can't be activated

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Message-ID: <xa1tfved2zq1.fsf@mina86.com>
Date:	Fri, 24 Oct 2014 18:34:46 +0200
From:	Michal Nazarewicz <mina86@...a86.com>
To:	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-sh@...r.kernel.org,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: Re: [PATCH 1/4] mm: cma: Don't crash on allocation if CMA area can't be activated

> On Thursday 23 October 2014 18:53:36 Michal Nazarewicz wrote:
>> As a matter of fact, this is present in kernels earlier than 3.17 but in
>> the 3.17 the code has been moved from drivers/base/dma-contiguous.c to
>> mm/cma.c so this might require separate stable patch.

On Fri, Oct 24 2014, Laurent Pinchart <laurent.pinchart@...asonboard.com> wrote:
> That could be done, but I'm not sure if it's really worth it. The bug only 
> occurs when the CMA zone activation fails. I've ran into that case due to a 
> bug introduced in v3.18-rc1, but this shouldn't be the case for older kernel 
> versions.

Fair enough.

-- 
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