From: "Luck, Tony" <tony.luck@intel.com>
To: Mel Gorman <mgorman@suse.de>, "H. Peter Anvin" <hpa@zytor.com>
Cc: Jiang Liu <jiang.liu@huawei.com>,
Tang Chen <tangchen@cn.fujitsu.com>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"rob@landley.net" <rob@landley.net>,
"isimatu.yasuaki@jp.fujitsu.com" <isimatu.yasuaki@jp.fujitsu.com>,
"laijs@cn.fujitsu.com" <laijs@cn.fujitsu.com>,
"wency@cn.fujitsu.com" <wency@cn.fujitsu.com>,
"linfeng@cn.fujitsu.com" <linfeng@cn.fujitsu.com>,
"yinghai@kernel.org" <yinghai@kernel.org>,
"kosaki.motohiro@jp.fujitsu.com" <kosaki.motohiro@jp.fujitsu.com>,
"minchan.kim@gmail.com" <minchan.kim@gmail.com>,
"rientjes@google.com" <rientjes@google.com>,
"rusty@rustcorp.com.au" <rusty@rustcorp.com.au>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
Len Brown <lenb@kernel.org>, "Wang, Frank" <frank.wang@intel.com>
Subject: RE: [PATCH v2 0/5] Add movablecore_map boot option
Date: Fri, 30 Nov 2012 02:58:40 +0000 [thread overview]
Message-ID: <3908561D78D1C84285E8C5FCA982C28F1C95FF53@ORSMSX108.amr.corp.intel.com> (raw)
In-Reply-To: <20121129110045.GX8218@suse.de>
> If any significant percentage of memory is in ZONE_MOVABLE then the memory
> hotplug people will have to deal with all the lowmem/highmem problems
> that used to be faced by 32-bit x86 with PAE enabled.
While these problems may still exist on large systems - I think it becomes
harder to construct workloads that run into problems. In those bad old days
a significant fraction of lowmem was consumed by the kernel ... so it was
pretty easy to find meta-data intensive workloads that would push it over
a cliff. Here we are talking about systems with say 128GB per node divided
into 64GB moveable and 64GB non-moveable (and I'd regard this as a rather
low-end machine). Unless the workload consists of zillions of tiny processes
all mapping shared memory blocks, the percentage of memory allocated to
the kernel is going to be tiny compared with the old 4GB days.
-Tony
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next prev parent reply other threads:[~2012-11-30 2:59 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-23 10:44 Tang Chen
2012-11-23 10:44 ` [PATCH v2 1/5] x86: get pg_data_t's memory from other node Tang Chen
2012-11-24 1:19 ` Jiang Liu
2012-11-26 1:19 ` Tang Chen
2012-12-02 15:11 ` Jiang Liu
2012-11-23 10:44 ` [PATCH v2 2/5] page_alloc: add movable_memmap kernel parameter Tang Chen
2012-11-23 10:44 ` [PATCH v2 3/5] page_alloc: Introduce zone_movable_limit[] to keep movable limit for nodes Tang Chen
2012-12-05 15:46 ` Jiang Liu
2012-12-06 1:20 ` Tang Chen
2012-11-23 10:44 ` [PATCH v2 4/5] page_alloc: Make movablecore_map has higher priority Tang Chen
2012-12-05 15:43 ` Jiang Liu
2012-12-06 1:26 ` Tang Chen
2012-12-06 2:26 ` Jiang Liu
2012-12-06 2:51 ` Jianguo Wu
2012-12-06 2:57 ` Tang Chen
2012-12-09 8:10 ` Tang Chen
2012-12-10 2:15 ` Jiang Liu
2012-11-23 10:44 ` [PATCH v2 5/5] page_alloc: Bootmem limit with movablecore_map Tang Chen
2012-11-26 12:22 ` wujianguo
2012-11-26 12:53 ` Tang Chen
2012-11-26 12:40 ` wujianguo
2012-11-26 13:15 ` Tang Chen
2012-11-26 15:48 ` H. Peter Anvin
2012-11-27 0:58 ` Jianguo Wu
2012-11-27 3:19 ` Wen Congyang
2012-11-27 3:22 ` Jianguo Wu
2012-11-27 3:34 ` Wen Congyang
2012-11-27 1:12 ` Jiang Liu
2012-11-27 1:20 ` H. Peter Anvin
2012-11-27 3:15 ` Wen Congyang
2012-11-27 5:31 ` H. Peter Anvin
2012-12-06 17:28 ` Jiang Liu
2012-12-06 17:41 ` H. Peter Anvin
2012-12-07 0:18 ` Jiang Liu
2012-12-19 9:17 ` Tang Chen
2012-11-27 3:10 ` [PATCH v2 0/5] Add movablecore_map boot option wujianguo
2012-11-27 5:43 ` Tang Chen
2012-11-27 6:20 ` H. Peter Anvin
2012-11-27 6:47 ` Jianguo Wu
2012-11-28 3:47 ` Tang Chen
2012-11-28 4:01 ` Jiang Liu
2012-11-28 5:21 ` Wen Congyang
2012-11-28 5:17 ` Jiang Liu
2012-11-28 4:53 ` Jianguo Wu
2012-11-27 8:00 ` Bob Liu
2012-11-27 8:29 ` Tang Chen
2012-11-27 8:49 ` H. Peter Anvin
2012-11-27 9:47 ` Wen Congyang
2012-11-27 9:53 ` H. Peter Anvin
2012-11-27 9:59 ` Yasuaki Ishimatsu
2012-11-27 12:09 ` Bob Liu
2012-11-27 12:49 ` Tang Chen
2012-11-28 3:24 ` Bob Liu
2012-11-28 4:08 ` Jiang Liu
2012-11-28 6:16 ` Tang Chen
2012-11-28 7:03 ` Jiang Liu
2012-11-28 8:29 ` Wen Congyang
2012-11-28 8:28 ` Jiang Liu
2012-11-28 8:38 ` Wen Congyang
2012-11-29 0:43 ` Jaegeuk Hanse
2012-11-29 1:24 ` Tang Chen
2012-11-30 9:20 ` Lai Jiangshan
2012-11-28 8:47 ` Jiang Liu
2012-11-28 21:34 ` Luck, Tony
2012-11-28 21:38 ` H. Peter Anvin
2012-11-29 11:00 ` Mel Gorman
2012-11-29 16:07 ` H. Peter Anvin
2012-11-29 22:41 ` Luck, Tony
2012-11-29 22:45 ` H. Peter Anvin
2012-11-30 2:56 ` Jiang Liu
2012-11-30 3:15 ` Yasuaki Ishimatsu
2012-11-30 15:36 ` Jiang Liu
2012-11-30 2:58 ` Luck, Tony [this message]
2012-11-30 3:28 ` H. Peter Anvin
2012-11-30 10:19 ` Glauber Costa
2012-11-30 10:52 ` Mel Gorman
2012-11-29 10:38 ` Yasuaki Ishimatsu
2012-11-29 11:05 ` Mel Gorman
2012-11-29 15:47 ` Jiang Liu
2012-11-29 15:53 ` Jiang Liu
2012-11-29 1:42 ` Jaegeuk Hanse
2012-11-29 2:25 ` Jiang Liu
2012-11-29 2:49 ` Wanpeng Li
2012-11-29 2:59 ` Jiang Liu
2012-11-29 2:49 ` Wanpeng Li
2012-11-30 22:27 ` Toshi Kani
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