linux-kernel - Re: [linux-pm] Re: [RFC][PATCH -mm 3/4] Hibernation: Pass CR3 in the image header on x86

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Message-ID: <20070824090220.GA2412@elf.ucw.cz>
Date:	Fri, 24 Aug 2007 11:02:20 +0200
From:	Pavel Machek <pavel@....cz>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	linux-pm@...ts.linux-foundation.org, Andi Kleen <ak@...e.de>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [linux-pm] Re: [RFC][PATCH -mm 3/4] Hibernation: Pass CR3 in the image header on x86_64

Hi!

> > > No, I do not think I like that. I believe both -> control and -> crc
> > > is just useless paranoia. Bitflip in this area is not going to be any
> > > worse than bitflip anywhere else, we should not pretend this is
> > > somehow "more important".
> > > 
> > > -> control should really be "protocol version"... probably should
> > > contain some field that is easy to increment.
> > 
> > OK
> > 
> > Perhaps I'll just remove the crc field.
> 
> Like in the patch below.

Yep, thanks.

> ---
> From: Rafael J. Wysocki <rjw@...k.pl>
> 
> Since we already pass the address of restore_registers() in the image header,
> we can also pass the value of the CR3 register from before the hibernation in
> the same way.  This will allow us to avoid using init_level4_pgt page tables
> during the restore.

ACK.

> @@ -9,6 +9,7 @@
>  
>  #include <linux/smp.h>
>  #include <linux/suspend.h>
> +#include <linux/crc32.h>
>  #include <asm/proto.h>
>  #include <asm/page.h>
>  #include <asm/pgtable.h>

This one is no longer neccessary.


									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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