From: Michal Hocko <mhocko@kernel.org>
To: js1304@gmail.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>,
Russell King <linux@armlinux.org.uk>,
Will Deacon <will.deacon@arm.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
kernel-team@lge.com, Joonsoo Kim <iamjoonsoo.kim@lge.com>
Subject: Re: [PATCH v7 0/7] Introduce ZONE_CMA
Date: Tue, 11 Apr 2017 20:15:20 +0200 [thread overview]
Message-ID: <20170411181519.GC21171@dhcp22.suse.cz> (raw)
In-Reply-To: <1491880640-9944-1-git-send-email-iamjoonsoo.kim@lge.com>
Hi,
I didn't get to read though patches yet but the cover letter didn't
really help me to understand the basic concepts to have a good starting
point before diving into implementation details. It contains a lot of
history remarks which is not bad but IMHO too excessive here. I would
appreciate the following information (some of that is already provided
in the cover but could benefit from some rewording/text reorganization).
- what is ZONE_CMA and how it is configured (from admin POV)
- how does ZONE_CMA compare to other zones
- who is allowed to allocate from this zone and what are the
guarantees/requirements for successful allocation
- how does the zone compare to a preallocate allocation pool
- how is ZONE_CMA balanced/reclaimed due to internal memory pressure
(from CMA users)
- is this zone reclaimable for the global memory reclaim
- why this was/is controversial
--
Michal Hocko
SUSE Labs
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next prev parent reply other threads:[~2017-04-11 18:15 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-11 3:17 js1304
2017-04-11 3:17 ` [PATCH v7 1/7] mm/page_alloc: don't reserve ZONE_HIGHMEM for ZONE_MOVABLE request js1304
2017-04-17 7:38 ` Minchan Kim
2017-04-21 1:32 ` Joonsoo Kim
2017-04-11 3:17 ` [PATCH v7 2/7] mm/cma: introduce new zone, ZONE_CMA js1304
2017-04-11 3:17 ` [PATCH v7 3/7] mm/cma: populate ZONE_CMA js1304
2017-04-11 3:17 ` [PATCH v7 4/7] mm/cma: remove ALLOC_CMA js1304
2017-04-11 3:17 ` [PATCH v7 5/7] mm/cma: remove MIGRATE_CMA js1304
2017-04-11 3:17 ` [PATCH v7 6/7] mm/cma: remove per zone CMA stat js1304
2017-04-11 3:17 ` [PATCH v7 7/7] ARM: CMA: avoid re-mapping CMA region if CONFIG_HIGHMEM js1304
2017-04-11 18:15 ` Michal Hocko [this message]
2017-04-12 1:35 ` [PATCH v7 0/7] Introduce ZONE_CMA Joonsoo Kim
2017-04-13 11:56 ` Michal Hocko
2017-04-17 2:02 ` Joonsoo Kim
2017-04-21 1:35 ` Joonsoo Kim
2017-04-21 6:54 ` Michal Hocko
2017-04-24 13:09 ` Michal Hocko
2017-04-25 3:42 ` Joonsoo Kim
2017-04-27 15:06 ` Michal Hocko
2017-04-28 8:04 ` Generic approach to customizable zones - was: " Igor Stoppa
2017-04-28 8:36 ` Michal Hocko
2017-04-28 9:04 ` Igor Stoppa
2017-05-02 4:01 ` Joonsoo Kim
2017-05-02 13:32 ` Michal Hocko
2017-05-11 2:12 ` Joonsoo Kim
2017-05-11 9:13 ` Michal Hocko
2017-05-12 2:00 ` Joonsoo Kim
2017-05-12 6:38 ` Michal Hocko
2017-05-15 3:57 ` Joonsoo Kim
2017-05-16 8:47 ` Michal Hocko
2017-05-17 7:44 ` Joonsoo Kim
2017-05-02 8:06 ` Vlastimil Babka
2017-05-02 13:03 ` Michal Hocko
2017-05-02 13:41 ` Igor Stoppa
2017-05-04 12:33 ` Vlastimil Babka
2017-05-04 12:46 ` Michal Hocko
2017-05-11 8:51 ` Vlastimil Babka
2017-04-12 1:39 ` Joonsoo Kim
2017-04-24 4:08 ` Bob Liu
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