linux-kernel - Re: [2.6.23-rc1 REGRESSION] CPU hotplug totally broken on HPC nx6325 (x86

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Message-ID: <alpine.LFD.0.999.0707301845380.4161@woody.linux-foundation.org>
Date:	Mon, 30 Jul 2007 18:50:30 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Chris Wright <chrisw@...s-sol.org>
cc:	"Rafael J. Wysocki" <rjw@...k.pl>, Andi Kleen <ak@...e.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Pavel Machek <pavel@....cz>,
	Michal Piotrowski <michal.k.k.piotrowski@...il.com>
Subject: Re: [2.6.23-rc1 REGRESSION] CPU hotplug totally broken on HPC nx6325
 (x86_64)



On Mon, 30 Jul 2007, Chris Wright wrote:
> 
> This also fixes paravirt patching which was broken when text_poke()
> tried to patch the various pv ops in lookup_address.

Hmm. What is "this"? The revert? 

That said, I do wonder whether virtualization still has problems with 
CONFIG_RODATA, though. We limit the RODATA memory ranges based on KPROBES 
and HOTPLUG_CPU, but not based on VIRTUALIZATION.

I'd expect any virtualization fixups to hit the same problems that the SMP 
alternatives hit. No?

		Linus
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