linux-kernel - Re: [PATCH 4/6] ftrace, x86: make kernel text writable only for conversions

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Message-ID: <20090228235201.GE26292@one.firstfloor.org>
Date:	Sun, 1 Mar 2009 00:52:01 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Pavel Machek <pavel@....cz>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/6] ftrace, x86: make kernel text writable only for conversions

> So using aliases for kernel text rewriting is bad idea because it
> would break ia64?

Nope.

First what you do on x86 kernels doesn't matter to ia64.
And then kernel text rewriting doesn't require any illegal aliases anyways.
It would only be a problem if someone set the kernel text uncached,
which no sane person would do.

> That was what the thread was about. (Sorry, no ia64
> or sparc manuals nearby).

google knows them all.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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