linux-kernel - Re: [PATCH] Add a text

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Message-ID: <20131129195419.GB17656@two.firstfloor.org>
Date:	Fri, 29 Nov 2013 20:54:19 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	torvalds@...ux-foundation.org, x86@...nel.org,
	Andi Kleen <ak@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...nel.org>,
	Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH] Add a text_poke syscall v2

Hi Oleg,

Thanks for finding all these problems.

> We are going to change this user page, it seems that we need
> set_page_dirty() ?

That's true. Will add it next rev.

> 
> Andi, et al. I am going to discuss the things I do not really
> understand, probably this can't make any sense, but...

I think it's enough to set the dirty bit in the underlying
struct page, no need to play games with the PTE.

-Andi

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