From: Michal Hocko <mhocko@kernel.org>
To: Zhaoyang Huang <huangzhaoyang@gmail.com>
Cc: zhaoyang.huang@spreadtrum.com,
Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>,
Mel Gorman <mgorman@techsingularity.net>,
Johannes Weiner <hannes@cmpxchg.org>,
vel Tatashin <pasha.tatashin@oracle.com>,
Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
kernel-patch-test@lists.linaro.org
Subject: Re: [PATCH v1] mm: help the ALLOC_HARDER allocation pass the watermarki when CMA on
Date: Fri, 23 Mar 2018 10:33:27 +0100 [thread overview]
Message-ID: <20180323093327.GM23100@dhcp22.suse.cz> (raw)
In-Reply-To: <CAGWkznHxTaymoEuFEQ+nN0ZvpPLhdE_fbwpT3pbDf+NQyHw-3g@mail.gmail.com>
On Fri 23-03-18 17:19:26, Zhaoyang Huang wrote:
> On Fri, Mar 23, 2018 at 4:38 PM, Michal Hocko <mhocko@kernel.org> wrote:
> > On Fri 23-03-18 15:57:32, Zhaoyang Huang wrote:
> >> For the type of 'ALLOC_HARDER' page allocation, there is an express
> >> highway for the whole process which lead the allocation reach __rmqueue_xxx
> >> easier than other type.
> >> However, when CMA is enabled, the free_page within zone_watermark_ok() will
> >> be deducted for number the pages in CMA type, which may cause the watermark
> >> check fail, but there are possible enough HighAtomic or Unmovable and
> >> Reclaimable pages in the zone. So add 'alloc_harder' here to
> >> count CMA pages in to clean the obstacles on the way to the final.
> >
> > This is no longer the case in the current mmotm tree. Have a look at
> > Joonsoo's zone movable based CMA patchset http://lkml.kernel.org/r/1512114786-5085-1-git-send-email-iamjoonsoo.kim@lge.com
> >
> Thanks for the information. However, I can't find the commit in the
> latest mainline, is it merged?
Not yet. It is still sitting in the mmomt tree. I am not sure what is
the merge plan but I guess it is still waiting for some review feedback.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2018-03-23 9:33 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-23 7:57 [PATCH v1] mm: help the ALLOC_HARDER allocation pass the watermarki when CMA on Zhaoyang Huang
2018-03-23 8:38 ` Michal Hocko
2018-03-23 9:19 ` Zhaoyang Huang
2018-03-23 9:33 ` Michal Hocko [this message]
2018-03-23 20:04 ` Andrew Morton
2018-04-04 0:31 ` Joonsoo Kim
2018-04-04 22:37 ` Andrew Morton
2018-04-05 7:44 ` Joonsoo Kim
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