linux-kernel - Re: [PATCH 1/5] x86, gfp: Cache best near node for memory allocation.

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Message-ID: <55C076A8.6060206@cn.fujitsu.com>
Date:	Tue, 4 Aug 2015 16:24:08 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	Jiang Liu <jiang.liu@...ux.intel.com>, Tejun Heo <tj@...nel.org>
CC:	<mingo@...hat.com>, <akpm@...ux-foundation.org>,
	<rjw@...ysocki.net>, <hpa@...or.com>, <laijs@...fujitsu.com>,
	<yasu.isimatu@...il.com>, <isimatu.yasuaki@...fujitsu.com>,
	<kamezawa.hiroyu@...fujitsu.com>, <izumi.taku@...fujitsu.com>,
	<gongzhaogang@...pur.com>, <qiaonuohan@...fujitsu.com>,
	<x86@...nel.org>, <linux-acpi@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
	<tangchen@...fujitsu.com>
Subject: Re: [PATCH 1/5] x86, gfp: Cache best near node for memory allocation.


On 08/04/2015 04:05 PM, Jiang Liu wrote:
> ......
>
>
> But,
> 1) in cpu_up(), it will try to online a node, and it doesn't check if
> the node has memory.
> 2) in try_offline_node(), it offlines CPUs first, and then the memory.
>
> This behavior looks a little wired, or let's say it is ambiguous. It
> seems that a NUMA node
> consists of CPUs and memory. So if the CPUs are online, the node should
> be online.
> Hi Chen,
> 	I have posted a patch set to enable memoryless node on x86,
> will repost it for review:) Hope it help to solve this issue.
> Thanks!
> Gerry
>
>
Sure. Looking forward to the latest patches. :)

Thanks.
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