linux-ext4 - Re: [PATCH 1/1] x86: fix text

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Message-ID: <20080425165635.GE3265@one.firstfloor.org>
Date:	Fri, 25 Apr 2008 18:56:35 +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 suspect I should have just kept using vmap(), even if I do dislike just 
> how insanely expensive that likely is.

If it's really a problem it would be better to just batch it and extract
it into a separate function. The larger scale callers of text_poke() are 
loops, so you could just map it once before the loop and then unmap after. 
But I haven't heard about anyone complaining about this.

-Andi
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