linux-kernel - Re: [PATCH] x86_64: fix kernel rodata NX setting

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Message-ID: <20080421190312.GB1061@elte.hu>
Date:	Mon, 21 Apr 2008 21:03:12 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Pekka Paalanen <pq@....fi>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86_64: fix kernel rodata NX setting


* Pekka Paalanen <pq@....fi> wrote:

> From 35922163c8054bd8d12df78ebae6a6a603760206 Mon Sep 17 00:00:00 2001
> From: Pekka Paalanen <pq@....fi>
> Date: Mon, 21 Apr 2008 21:36:09 +0300
> Subject: [PATCH] x86_64: fix kernel rodata NX setting
> 
> Without CONFIG_DYNAMIC_FTRACE, mark_rodata_ro() would mark a wrong 
> number of pages as no-execute. The bug was introduced in the patch 
> "ftrace: dont write protect kernel text". The symptom was machine 
> reboot after a CPU hotplug.

thanks Pekka, nice fix!

	Ingo
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