linux-kernel - Re: [PATCH 1/1] x86: fix text

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Message-ID: <20080425172651.GF3265@one.firstfloor.org>
Date:	Fri, 25 Apr 2008 19:26:51 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Andi Kleen <andi@...stfloor.org>,
	Jiri Slaby <jirislaby@...il.com>,
	David Miller <davem@...emloft.net>, zdenek.kabelac@...il.com,
	rjw@...k.pl, paulmck@...ux.vnet.ibm.com, akpm@...ux-foundation.org,
	linux-ext4@...r.kernel.org, herbert@...dor.apana.org.au,
	penberg@...helsinki.fi, clameter@....com,
	linux-kernel@...r.kernel.org,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	pageexec@...email.hu, "H. Peter Anvin" <hpa@...or.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>
Subject: Re: [PATCH 1/1] x86: fix text_poke

> I agree that it has to be robust, but if we want to make suspend/resume 
> be instantaneous (and we do), performance does actually matter. Yes, this 

For suspend/resume we can actually just disable all the text_poke()s.
They are not needed because we don't expect to stay in single CPU
mode for long after wake up and they will just be undone again.

I guess if it really was a problem (but really I haven't heard about it)
the easiest fix would be to just extended system_state to SYSTEM_SUSPEND
and then skip them if that is true. 

-Andi
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