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Re: [PATCH] [RESEND] x86_64: add memory hotremove config option

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From: Gary Hade
Subject: Re: [PATCH] [RESEND] x86_64: add memory hotremove config option
Date: Friday, September 5, 2008 - 12:53 pm

On Fri, Sep 05, 2008 at 08:04:55PM +0200, Andi Kleen wrote:

So far, I have tested it on a 2-node IBM x460, 2-node IBM x3950, and
a 4-node IBM x3950 M2 and have been able to successfully offline and
re-online all memory sections marked as removable multiple times with
no apparent problems.

By directing the change to -mm our hope is that others will try it
on their systems and help us shake out any issues that they my find.


A baby step towards evental total node removal.


The inability to offline all non-primary node memory sections
certainly needs to be addressed.  The pgdat removal work that
Yasunori Goto has started will hopefully continue and help resolve
this issue.  We have only just started thinking about issues related
to resources other that CPUs and memory that will need to be released
in preparation for node removal (e.g. memory and i/o resources
assigned to PCI devices on a node targeted for removal).  Much of
this is new territory for us so any suggestions that you and others
can offer will be much appreciated.

Thanks for asking.

Gary

-- 
Gary Hade
System x Enablement
IBM Linux Technology Center
503-578-4503  IBM T/L: 775-4503
garyhade@us.ibm.com
http://www.ibm.com/linux/ltc

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Messages in current thread:
[PATCH] [RESEND] x86_64: add memory hotremove config option, Gary Hade, (Fri Sep 5, 10:21 am)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Ingo Molnar, (Fri Sep 5, 10:44 am)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Andi Kleen, (Fri Sep 5, 11:04 am)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Badari Pulavarty, (Fri Sep 5, 11:14 am)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Ingo Molnar, (Fri Sep 5, 11:17 am)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Badari Pulavarty, (Fri Sep 5, 11:31 am)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Andi Kleen, (Fri Sep 5, 11:54 am)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Gary Hade, (Fri Sep 5, 12:53 pm)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Andi Kleen, (Fri Sep 5, 1:04 pm)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Gary Hade, (Fri Sep 5, 2:54 pm)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Badari Pulavarty, (Fri Sep 5, 3:34 pm)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Andi Kleen, (Fri Sep 5, 5:01 pm)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Yasunori Goto, (Sat Sep 6, 12:06 am)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Andi Kleen, (Sat Sep 6, 1:53 am)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Ingo Molnar, (Sat Sep 6, 7:33 am)
Re: Re: [PATCH] [RESEND] x86_64: add memory hotremove conf ..., kamezawa.hiroyu, (Sat Sep 6, 9:00 am)
Re: Re: Re: [PATCH] [RESEND] x86_64: add memory hotremove ..., kamezawa.hiroyu, (Sat Sep 6, 9:05 am)
Re: Re: [PATCH] [RESEND] x86_64: add memory hotremove conf ..., Ingo Molnar, (Sat Sep 6, 9:17 am)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Nick Piggin, (Sun Sep 7, 10:52 pm)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Andi Kleen, (Mon Sep 8, 2:36 am)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Nick Piggin, (Mon Sep 8, 2:46 am)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Andi Kleen, (Mon Sep 8, 3:30 am)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Nick Piggin, (Mon Sep 8, 4:19 am)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Andi Kleen, (Mon Sep 8, 4:30 am)
Re: [PATCH] [RESEND] x86_64: add memory hotremove config o ..., Nick Piggin, (Mon Sep 8, 6:48 am)
[PATCH] Cleanup to make remove_memory() arch neutral, Badari Pulavarty, (Mon Sep 8, 2:52 pm)
[PATCH] x86: add memory hotremove config option, Badari Pulavarty, (Mon Sep 8, 2:56 pm)
Re: [PATCH] Cleanup to make remove_memory() arch neutral, Andrew Morton, (Mon Sep 8, 5:56 pm)
Re: [PATCH] Cleanup to make remove_memory() arch neutral, Randy Dunlap, (Mon Sep 8, 6:14 pm)
Re: [PATCH] Cleanup to make remove_memory() arch neutral, Yasunori Goto, (Mon Sep 8, 6:21 pm)
Re: [PATCH] Cleanup to make remove_memory() arch neutral, Badari Pulavarty, (Tue Sep 9, 8:12 am)