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

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Message-ID: <20080906000154.GC18288@one.firstfloor.org>
Date:	Sat, 6 Sep 2008 02:01:54 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Gary Hade <garyhade@...ibm.com>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-mm@...ck.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Yasunori Goto <y-goto@...fujitsu.com>,
	Badari Pulavarty <pbadari@...ibm.com>,
	Mel Gorman <mel@....ul.ie>, Chris McDermott <lcm@...ibm.com>,
	linux-kernel@...r.kernel.org, x86@...nel.org,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] [RESEND] x86_64: add memory hotremove config option

> I am not sure if I understand why you appear to be opposed to
> enabling the hotremove function before all the issues related

I'm quite sceptical that it can be ever made to work in a useful
way for real hardware (as opposed to an hypervisor para virtual setup
for which this interface is not the right way -- it should be done
in some specific driver instead) 

And if it cannot be made to work then it will be a false promise
to the user. They will see it and think it will work, but it will
not.

This means I don't see a real use case for this feature.

-Andi

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