From: Zhang Yanfei <zhangyanfei.yes@gmail.com>
To: Minchan Kim <minchan@kernel.org>, Hui Zhu <teawater@gmail.com>
Cc: akpm@linux-foundation.org, mgorman@suse.de, hannes@cmpxchg.org,
riel@redhat.com, vbabka@suse.cz, iamjoonsoo.kim@lge.com,
isimatu.yasuaki@jp.fujitsu.com, wangnan0@huawei.com,
davidlohr@hp.com, cl@linux.com, rientjes@google.com,
sasha.levin@oracle.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, Hui Zhu <zhuhui@xiaomi.com>,
Weixing Liu <liuweixing@xiaomi.com>
Subject: Re: [PATCH] CMA: treat free cma pages as non-free if not ALLOC_CMA on watermark checking
Date: Tue, 20 Jan 2015 23:33:27 +0800 [thread overview]
Message-ID: <54BE7547.6010701@gmail.com> (raw)
In-Reply-To: <20150119065544.GA18473@blaptop>
Hello Minchan,
How are you?
a?? 2015/1/19 14:55, Minchan Kim a??e??:
> Hello,
>
> On Sun, Jan 18, 2015 at 04:32:59PM +0800, Hui Zhu wrote:
>> From: Hui Zhu <zhuhui@xiaomi.com>
>>
>> The original of this patch [1] is part of Joonsoo's CMA patch series.
>> I made a patch [2] to fix the issue of this patch. Joonsoo reminded me
>> that this issue affect current kernel too. So made a new one for upstream.
>
> Recently, we found many problems of CMA and Joonsoo tried to add more
> hooks into MM like agressive allocation but I suggested adding new zone
Just out of curiosity, "new zone"? Something like movable zone?
Thanks.
> would be more desirable than more hooks in mm fast path in various aspect.
> (ie, remove lots of hooks in hot path of MM, don't need reclaim hooks
> for special CMA pages, don't need custom fair allocation for CMA).
>
> Joonsoo is investigating the direction so please wait.
> If it turns out we have lots of hurdle to go that way,
> this direction(ie, putting more hooks) should be second plan.
>
> Thanks.
>
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next prev parent reply other threads:[~2015-01-20 15:34 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-18 8:32 [PATCH] CMA: treat free cma pages as non-free if not ALLOC_CMA on watermark checking Hui Zhu
2015-01-19 6:55 ` Minchan Kim
2015-01-19 7:37 ` Hui Zhu
2015-01-20 15:33 ` Zhang Yanfei [this message]
2015-01-22 1:57 ` Joonsoo Kim
2015-01-22 16:12 ` Christoph Lameter
2015-01-23 1:23 ` Joonsoo Kim
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