Re: page allocator bug in 3.16?
From: Thomas Hellstrom
Date: Fri Sep 26 2014 - 06:46:05 EST
On 09/26/2014 12:40 PM, Chuck Ebbert wrote:
> On Fri, 26 Sep 2014 09:15:57 +0200
> Thomas Hellstrom <thellstrom@xxxxxxxxxx> wrote:
>> On 09/26/2014 01:52 AM, Peter Hurley wrote:
>>> On 09/25/2014 03:35 PM, Chuck Ebbert wrote:
>>>> There are six ttm patches queued for 3.16.4:
>>> Thanks for info, Chuck.
>>> Unfortunately, none of these fix TTM dma allocation doing CMA dma allocation,
>>> which is the root problem.
>>> Peter Hurley
>> The problem is not really in TTM but in CMA, There was a guy offering to
>> fix this in the CMA code but I guess he didn't probably because he
>> didn't receive any feedback.
> Yeah, the "solution" to this problem seems to be "don't enable CMA on
> x86". Maybe it should even be disabled in the config system.
Or, as previously suggested, don't use CMA for order 0 (single page)
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