Date: Mon, 7 Nov 2016 15:15:00 +0900
From: Joonsoo Kim <iamjoonsoo.kim@lge.com>
To: Chen Feng <puck.chen@hisilicon.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
        Rik van Riel <riel@redhat.com>, Johannes Weiner <hannes@cmpxchg.org>,
        mgorman@techsingularity.net, Laura Abbott <lauraa@codeaurora.org>,
        Minchan Kim <minchan@kernel.org>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Michal Nazarewicz <mina86@mina86.com>,
        "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
        Vlastimil Babka <vbabka@suse.cz>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v6 2/6] mm/cma: introduce new zone, ZONE_CMA
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On Tue, Nov 01, 2016 at 03:58:32PM +0800, Chen Feng wrote:
> Hello, I hava a question on cma zone.
> 
> When we have cma zone, cma zone will be the highest zone of system.
> 
> In android system, the most memory allocator is ION. Media system will
> alloc unmovable memory from it.
> 
> On low memory scene, will the CMA zone always do balance?

Allocation request for low zone (normal zone) would not cause CMA zone
to be balanced since it isn't helpful.

> Should we transmit the highest available zone to kswapd？

It is already done when necessary.

Thanks.