Messages in this thread | | | From | Joonsoo Kim <> | Date | Tue, 21 Jul 2020 12:33:23 +0900 | Subject | Re: [PATCH v2 1/4] mm/page_alloc: fix non cma alloc context |
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2020년 7월 21일 (화) 오전 8:23, Andrew Morton <akpm@linux-foundation.org>님이 작성: > > On Mon, 20 Jul 2020 13:56:15 +0900 js1304@gmail.com wrote: > > > Currently, preventing cma area in page allocation is implemented by using > > current_gfp_context(). However, there are two problems of this > > implementation. > > > > First, this doesn't work for allocation fastpath. In the fastpath, > > original gfp_mask is used since current_gfp_context() is introduced in > > order to control reclaim and it is on slowpath. > > Second, clearing __GFP_MOVABLE has a side effect to exclude the memory > > on the ZONE_MOVABLE for allocation target. > > > > To fix these problems, this patch changes the implementation to exclude > > cma area in page allocation. Main point of this change is using the > > alloc_flags. alloc_flags is mainly used to control allocation so it fits > > for excluding cma area in allocation. > > > > Fixes: d7fefcc8de91 (mm/cma: add PF flag to force non cma alloc) > > Cc: <stable@vger.kernel.org> > > This patch is against linux-next (or -mm) and has a lot of issues > applying to mainline. If we indeed wish to backport it to -stable, it > should be against mainline, please.
I sent a revised patch against the mainline a minute ago. Subject and commit description is updated.
Thanks.
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