linux-kernel - Re: [PATCH] x86: make text

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Message-ID: <20090306140612.GA8566@elte.hu>
Date:	Fri, 6 Mar 2009 15:06:12 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Masami Hiramatsu <mhiramat@...hat.com>
Cc:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>,
	Steven Rostedt <rostedt@...dmis.org>,
	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	"H. Peter Anvin" <hpa@...or.com>,
	Steven Rostedt <srostedt@...hat.com>
Subject: Re: [PATCH] x86: make text_poke() atomic using fixmap


* Ingo Molnar <mingo@...e.hu> wrote:

> 
> * Masami Hiramatsu <mhiramat@...hat.com> wrote:
> 
> > Hi Ingo,
> > 
> > Here is the patch which uses fixmaps instead of vmap in 
> > text_poke(). This made the code much simpler than I thought 
> > :).
> 
> Looks good to me at a quick glance albeit Linus had second 
> thoughts about using fixmaps for this in the past. But with 
> delayed-flush for vmaps i think fixmaps are again the simpler 
> and more robust - albeit more limited - choice ...
> 
> In any case, the x86 tree already unified fixmap.h so could 
> you please resend the whole series as a 0/3, 1/3, 2/3, 3/3 
> thing against tip:master, starting a new thread on lkml? (this 
> thread is already way too deep)

Ping? I think there's agreement and it would be nice to fix this 
in .30. Looks too complex for .29 - maybe backportable to .29.1 
if it stays problem-free in testing.

	Ingo
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