Re: [PATCH for v5.9] mm/page_alloc: handle a missing case for memalloc_nocma_{save/restore} APIs

[Vlastimil Babka]

On 9/25/20 6:59 AM, Joonsoo Kim wrote:
> 2020년 8월 28일 (금) 오전 8:54, Joonsoo Kim <js1304@xxxxxxxxx>님이 작성:
> 
> Hello, Andrew and Vlastimil.
> 
> It's better to fix this possible bug introduced in v5.9-rc1 before
> v5.9 is released.
> Which approach do you prefer?
> If it is determined, I will immediately send a patch as you suggested.

Hmm both Mel and I preferred the bypass approach and nobody else weighted in, so
if you don't mind, you can use my suggestion. Hmm maybe alloc_flags & ALLOC_CMA
check should precede migratetype check in the if () to optimize for userspace
allocations?

Thanks,
Vlastimil

> Thanks.
>