From: Vlastimil Babka <vbabka@suse.cz>
To: Xishi Qiu <qiuxishi@huawei.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
nao.horiguchi@gmail.com, Yinghai Lu <yinghai@kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
mingo@elte.hu, Xiexiuqi <xiexiuqi@huawei.com>,
Hanjun Guo <guohanjun@huawei.com>,
"Luck, Tony" <tony.luck@intel.com>, Linux MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [RFC PATCH 00/12] mm: mirrored memory support for page buddy allocations
Date: Tue, 16 Jun 2015 11:46:18 +0200 [thread overview]
Message-ID: <557FF06A.3020000@suse.cz> (raw)
In-Reply-To: <557FDB9B.1090105@huawei.com>
On 06/16/2015 10:17 AM, Xishi Qiu wrote:
> On 2015/6/16 15:53, Vlastimil Babka wrote:
>
>> On 06/04/2015 02:54 PM, Xishi Qiu wrote:
>>>
>>> I think add a new migratetype is btter and easier than a new zone, so I use
>>
>> If the mirrored memory is in a single reasonably compact (no large holes) range
>> (per NUMA node) and won't dynamically change its size, then zone might be a
>> better option. For one thing, it will still allow distinguishing movable and
>> unmovable allocations within the mirrored memory.
>>
>> We had enough fun with MIGRATE_CMA and all kinds of checks it added to allocator
>> hot paths, and even CMA is now considering moving to a separate zone.
>>
>
> Hi, how about the problem of this case:
> e.g. node 0: 0-4G(dma and dma32)
> node 1: 4G-8G(normal), 8-12G(mirror), 12-16G(normal),
> so more than one normal zone in a node? or normal zone just span the mirror zone?
Normal zone can span the mirror zone just fine. However, it will result in zone
scanners such as compaction to skip over the mirror zone inefficiently. Hmm...
next prev parent reply other threads:[~2015-06-16 9:46 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-04 12:54 [RFC PATCH 00/12] mm: mirrored memory support for page buddy allocations Xishi Qiu
2015-06-04 12:56 ` [RFC PATCH 01/12] mm: add a new config to manage the code Xishi Qiu
2015-06-08 11:52 ` Leon Romanovsky
2015-06-08 15:14 ` Luck, Tony
2015-06-08 16:36 ` Leon Romanovsky
2015-06-09 6:44 ` Kamezawa Hiroyuki
2015-06-09 10:10 ` Xishi Qiu
2015-06-10 3:07 ` Kamezawa Hiroyuki
2015-06-04 12:57 ` [RFC PATCH 02/12] mm: introduce mirror_info Xishi Qiu
2015-06-04 16:57 ` Luck, Tony
2015-06-05 1:53 ` Xishi Qiu
2015-06-09 6:48 ` Kamezawa Hiroyuki
2015-06-04 12:58 ` [RFC PATCH 03/12] mm: introduce MIGRATE_MIRROR to manage the mirrored, pages Xishi Qiu
2015-06-09 6:54 ` Kamezawa Hiroyuki
2015-06-04 12:59 ` [RFC PATCH 04/12] mm: add mirrored pages to buddy system Xishi Qiu
2015-06-04 13:00 ` [RFC PATCH 05/12] mm: introduce a new zone_stat_item NR_FREE_MIRROR_PAGES Xishi Qiu
2015-06-04 13:01 ` [RFC PATCH 06/12] mm: add free mirrored pages info Xishi Qiu
2015-06-04 13:02 ` [RFC PATCH 07/12] mm: introduce __GFP_MIRROR to allocate mirrored pages Xishi Qiu
2015-06-09 7:01 ` Kamezawa Hiroyuki
2015-06-04 13:02 ` [RFC PATCH 08/12] mm: use mirrorable to switch allocate mirrored memory Xishi Qiu
2015-06-04 17:01 ` Luck, Tony
2015-06-04 18:41 ` Dave Hansen
2015-06-05 3:13 ` Xishi Qiu
2015-06-09 7:06 ` Kamezawa Hiroyuki
2015-06-09 10:09 ` Xishi Qiu
2015-06-10 3:09 ` Kamezawa Hiroyuki
2015-06-12 8:05 ` Naoya Horiguchi
2015-06-04 13:03 ` [RFC PATCH 09/12] mm: enable allocate mirrored memory at boot time Xishi Qiu
2015-06-04 13:04 ` [RFC PATCH 10/12] mm: add the buddy system interface Xishi Qiu
2015-06-04 17:09 ` Luck, Tony
2015-06-05 3:14 ` Xishi Qiu
2015-06-09 7:12 ` Kamezawa Hiroyuki
2015-06-09 10:04 ` Xishi Qiu
2015-06-10 3:06 ` Kamezawa Hiroyuki
2015-06-10 20:40 ` Luck, Tony
2015-06-15 8:47 ` Kamezawa Hiroyuki
2015-06-15 17:20 ` Luck, Tony
2015-06-16 0:31 ` Kamezawa Hiroyuki
2015-06-25 9:44 ` Xishi Qiu
2015-06-25 23:54 ` Kamezawa Hiroyuki
2015-06-26 1:43 ` Xishi Qiu
2015-06-26 8:34 ` Kamezawa Hiroyuki
2015-06-26 10:38 ` Xishi Qiu
2015-06-26 18:42 ` Luck, Tony
2015-06-04 13:04 ` [RFC PATCH 11/12] mm: add the PCP interface Xishi Qiu
2015-06-04 18:44 ` Dave Hansen
2015-06-04 13:05 ` [RFC PATCH 12/12] mm: let slab/slub/slob use mirrored memory Xishi Qiu
2015-06-04 17:14 ` Luck, Tony
2015-06-12 8:42 ` [RFC PATCH 00/12] mm: mirrored memory support for page buddy allocations Naoya Horiguchi
2015-06-12 9:09 ` Xishi Qiu
2015-06-12 19:03 ` Luck, Tony
2015-06-15 0:25 ` Naoya Horiguchi
2015-06-16 7:53 ` Vlastimil Babka
2015-06-16 8:17 ` Xishi Qiu
2015-06-16 9:46 ` Vlastimil Babka [this message]
2015-06-18 1:23 ` Xishi Qiu
2015-06-18 5:58 ` Vlastimil Babka
2015-06-18 9:37 ` Xishi Qiu
2015-06-18 9:55 ` Vlastimil Babka
2015-06-18 20:33 ` Luck, Tony
2015-06-19 1:36 ` Xishi Qiu
2015-06-19 18:42 ` Luck, Tony
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