linux-kernel - Re: [PATCH v6 2/6] mm/cma: introduce new zone, ZONE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 7 Nov 2016 15:15:00 +0900
From:   Joonsoo Kim <iamjoonsoo.kim@....com>
To:     Chen Feng <puck.chen@...ilicon.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Rik van Riel <riel@...hat.com>,
        Johannes Weiner <hannes@...xchg.org>,
        mgorman@...hsingularity.net, Laura Abbott <lauraa@...eaurora.org>,
        Minchan Kim <minchan@...nel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Michal Nazarewicz <mina86@...a86.com>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
        Vlastimil Babka <vbabka@...e.cz>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 2/6] mm/cma: introduce new zone, ZONE_CMA

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.