linux-kernel - Re: [patch 06/11] Text Edit Lock

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Message-ID: <47581C0D.20793.3B77EE8@pageexec.freemail.hu>
Date:	Thu, 06 Dec 2007 15:58:05 +0200
From:	pageexec@...email.hu
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
CC:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	Andi Kleen <andi@...stfloor.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [patch 06/11] Text Edit Lock - Alternative code for x86

On 6 Dec 2007 at 9:44, Mathieu Desnoyers wrote:

> It is correct to assume that the WP bit will always be activated, in
> every configuration, even though we don't use the DEBUG_RODATA ?

yes, without it the kernel couldn't rely on page faults to trigger
copy-on-write on userland pages for example (just look at what it
has to do on the original i386...).

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