linux-kernel - Re: [RFC][PATCH 0/4] Redesign cpu

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Message-ID: <20060826220525.GA27933@elte.hu>
Date:	Sun, 27 Aug 2006 00:05:25 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Linus Torvalds <torvalds@...l.org>
Cc:	Dave Jones <davej@...hat.com>, Andrew Morton <akpm@...l.org>,
	ego@...ibm.com, rusty@...tcorp.com.au,
	linux-kernel@...r.kernel.org, arjan@...el.linux.com,
	vatsa@...ibm.com, dipankar@...ibm.com, ashok.raj@...el.com
Subject: Re: [RFC][PATCH 0/4] Redesign cpu_hotplug locking.


* Linus Torvalds <torvalds@...l.org> wrote:

> I personally doubt that it's the case that we'd want to accelerate 
> inclusion - very few things actually do CPU hotplug, and right now the 
> only way to even hit the sequences in normal use is literally just the 
> "suspend under SMP" case that hasn't historically worked very well 
> anyway, but was what made at least me personally aware of the problems 
> ;^).

there's also bootup on SMP that is technically a series of hot-cpu-add 
events. That already tests some aspects of it. Maybe we should turn 
shutdown into the logical reverse: into a series of hot-cpu-remove 
events?

	Ingo
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