Re: [PATCH 0/7] improve robustness on handling migratetype
From: Michal Nazarewicz
Date: Thu Jan 09 2014 - 04:06:54 EST
On Thu, Jan 09 2014, Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> wrote:
> Third, there is the problem on buddy allocator. It doesn't consider
> migratetype when merging buddy, so pages from cma or isolate region can
> be moved to other migratetype freelist. It makes CMA failed over and over.
> To prevent it, the buddy allocator should consider migratetype if
> CMA/ISOLATE is enabled.
There should never be situation where a CMA page shares a pageblock (or
a max-order page) with a non-CMA page though, so this should never be an
issue.
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