Message-ID: <4014CF39.50209@cyberone.com.au>
Date: Mon, 26 Jan 2004 19:26:33 +1100
From: Nick Piggin <piggin@cyberone.com.au>
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To: Rusty Russell <rusty@rustcorp.com.au>,
       "Martin J. Bligh" <mbligh@aracnet.com>
CC: linux-kernel@vger.kernel.org
Subject: Re: New NUMA scheduler and hotplug CPU
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Rusty Russell wrote:

>Hi Nick!
>
>	Looking at your new scheduler in -mm, it uses cpu_online_map
>alot in arch_init_sched_domains.  This means with hotplug CPU that it
>would need to be modified: certainly possible to do, but messy.
>
>	The other option is to use cpu_possible_map to create the full
>topology up front, and then it need never change.  AFAICT, no other
>changes are neccessary: you already check against moving tasks to
>offline cpus.
>
>Anyway, I was just porting the hotplug CPU patches over to -mm, and
>came across this, so I thought I'd ask.
>

Hi Rusty,
Yes I'd like to use the cpu_possible_map to create the full
topology straight up. Martin?


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