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From: "Américo Wang" <xiyou.wangcong@gmail.com>
To: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Greg Kroah-Hartman <gregkh@suse.de>,
	Shaohui Zheng <shaohui.zheng@intel.com>,
	Paul Mundt <lethal@linux-sh.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Andi Kleen <ak@linux.intel.com>, Yinghai Lu <yinghai@kernel.org>,
	Haicheng Li <haicheng.li@intel.com>,
	Randy Dunlap <randy.dunlap@oracle.com>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org
Subject: Re: [patch 1/2] x86: add numa=possible command line option
Date: Sun, 21 Nov 2010 22:26:15 +0800	[thread overview]
Message-ID: <20101121142615.GI9099@hack> (raw)
In-Reply-To: <alpine.DEB.2.00.1011201826140.12889@chino.kir.corp.google.com>


Hi, David

On Sat, Nov 20, 2010 at 06:28:31PM -0800, David Rientjes wrote:
>Adds a numa=possible=<N> command line option to set an additional N nodes
>as being possible for memory hotplug.  This set of possible nodes
>controls nr_node_ids and the sizes of several dynamically allocated node
>arrays.
>
>This allows memory hotplug to create new nodes for newly added memory
>rather than binding it to existing nodes.
>
>The first use-case for this will be node hotplug emulation which will use
>these possible nodes to create new nodes to test the memory hotplug
>callbacks and surrounding memory hotplug code.
>


I am not sure how much value of making this dynamic,
for CPU, we do this at compile time, i.e. NR_CPUS,
so how about NR_NODES?

Also, numa=possible= is not as clear as numa=max=, for me at least.

Thanks.

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  parent reply	other threads:[~2010-11-21 14:23 UTC|newest]

Thread overview: 72+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-11-17  2:07 [0/8,v3] NUMA Hotplug Emulator - Introduction & Feedbacks shaohui.zheng
2010-11-17  2:08 ` [1/8,v3] NUMA Hotplug Emulator: add function to hide memory region via e820 table shaohui.zheng
2010-11-17  8:16   ` David Rientjes
2010-11-18  9:20     ` Shaohui Zheng
2010-11-18 21:16       ` David Rientjes
2010-11-19  0:12         ` Shaohui Zheng
2010-11-21  0:45           ` David Rientjes
2010-11-21 14:00             ` Américo Wang
2010-11-21 21:33               ` David Rientjes
2010-11-17  2:08 ` [2/8,v3] NUMA Hotplug Emulator: infrastructure of NUMA hotplug emulation shaohui.zheng
2010-11-17  8:16   ` David Rientjes
2010-11-17  7:51     ` Shaohui Zheng
2010-11-17 21:10       ` David Rientjes
2010-11-18  4:14         ` Shaohui Zheng
2010-11-18  6:27           ` Paul Mundt
2010-11-18  5:27             ` Shaohui Zheng
2010-11-18 21:24               ` David Rientjes
2010-11-19  0:32                 ` Shaohui Zheng
2010-11-21  0:48                   ` David Rientjes
2010-11-21  2:28                     ` [patch 1/2] x86: add numa=possible command line option David Rientjes
2010-11-21  2:28                       ` [patch 2/2] mm: add node hotplug emulation David Rientjes
2010-11-21 17:34                         ` Greg KH
2010-11-21 21:48                           ` David Rientjes
2010-11-21 23:08                             ` [patch 2/2 v2] " David Rientjes
2010-11-22  0:56                               ` Greg KH
2010-11-28  1:52                                 ` David Rientjes
2010-11-28  5:17                                   ` Greg KH
2010-11-30  0:04                                     ` David Rientjes
2010-11-21 14:26                       ` Américo Wang [this message]
2010-11-21 21:46                         ` [patch 1/2] x86: add numa=possible command line option David Rientjes
2010-11-22 15:43                           ` Américo Wang
2010-11-21 15:14                     ` [2/8,v3] NUMA Hotplug Emulator: infrastructure of NUMA hotplug emulation Li, Haicheng
2010-11-21 21:42                       ` David Rientjes
2010-11-18 21:19           ` David Rientjes
2010-11-17  2:08 ` [3/8,v3] NUMA Hotplug Emulator: Userland interface to hotplug-add fake offlined nodes shaohui.zheng
2010-11-17  8:16   ` David Rientjes
2010-11-17  2:08 ` [4/8,v3] NUMA Hotplug Emulator: Abstract cpu register functions shaohui.zheng
2010-11-17  2:08 ` [5/8,v3] NUMA Hotplug Emulator: support cpu probe/release in x86 shaohui.zheng
2010-11-21 14:45   ` Américo Wang
2010-11-22  0:01     ` Shaohui Zheng
2010-11-22 15:51       ` Américo Wang
2010-11-22 23:29         ` Shaohui Zheng
2010-11-17  2:08 ` [6/8,v3] NUMA Hotplug Emulator: Fake CPU socket with logical CPU on x86 shaohui.zheng
2010-11-17  2:08 ` [7/8,v3] NUMA Hotplug Emulator: extend memory probe interface to support NUMA shaohui.zheng
2010-11-17 18:50   ` Dave Hansen
2010-11-17 21:18     ` David Rientjes
2010-11-17 21:55       ` Dave Hansen
2010-11-17 22:44         ` David Rientjes
2010-11-17 23:00           ` Dave Hansen
2010-11-17 23:17             ` David Rientjes
2010-11-18 16:59           ` Aaron Durbin
2010-11-18  4:48       ` Shaohui Zheng
2010-11-18  6:24         ` Paul Mundt
2010-11-18 21:28           ` David Rientjes
2010-11-18 21:31         ` David Rientjes
2010-11-18  4:36     ` Shaohui Zheng
2010-11-19  7:51     ` Shaohui Zheng
2010-11-19 16:36       ` Dave Hansen
2010-11-17  2:08 ` [8/8,v3] NUMA Hotplug Emulator: documentation shaohui.zheng
2010-11-17 23:06   ` Randy Dunlap
2010-11-18  2:31     ` Shaohui Zheng
2010-11-21 15:03   ` Américo Wang
2010-11-21 15:16     ` Li, Haicheng
2010-11-21 23:33     ` Shaohui Zheng
2010-11-22 16:04       ` Américo Wang
2010-11-22 23:23         ` Shaohui Zheng
2010-11-17  5:22 ` [0/8,v3] NUMA Hotplug Emulator - Introduction & Feedbacks Paul Mundt
2010-11-19  5:54   ` Shaohui Zheng
2010-11-17  9:26 ` Yinghai Lu
2010-11-18  2:03   ` Shaohui Zheng
     [not found] <A24AE1FFE7AEC5489F83450EE98351BF28723FC48C@shsmsx502.ccr.corp.intel.com>
2010-11-22  2:24 ` [patch 1/2] x86: add numa=possible command line option Shaohui Zheng
2010-11-28  2:03   ` David Rientjes

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