From: Keith Owens <kaos@ocs.com.au>
To: coywolf@sosdg.org
Cc: akpm@osdl.org, Andi Kleen <ak@suse.de>, linux-kernel@vger.kernel.org,
       Arjan van de Ven <arjan@infradead.org>, Josh Boyer <jdub@us.ibm.com>
Subject: Re: [patch] mark text section read-only 
In-reply-to: Your message of "Sat, 12 Nov 2005 11:34:55 CDT."
             <20051112163455.GA1425@everest.sosdg.org> 
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Date: Sun, 13 Nov 2005 15:50:03 +1100
Message-ID: <3066.1131857403@ocs3.ocs.com.au>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 787
Lines: 19

On Sat, 12 Nov 2005 11:34:55 -0500, 
Coywolf Qi Hunt <coywolf@sosdg.org> wrote:
>+config DEBUG_ROTEXT
>+	bool "Write protect kernel text"
>+	depends on DEBUG_KERNEL
>+	help
>+	  Mark the kernel text as write-protected in the pagetables,
>+	  in order to catch accidental (and incorrect) writes to kernel text
>+	  area. This option will increase TLB pressure thus impact performance.
>+	  Note this may conflict with kprobes. If in doubt, say "N".

Also conflicts with kdb, kgdb, and any other kernel debugger that uses
software breakpoints.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/