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

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Date:	Fri, 24 Aug 2007 23:24:19 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Pavel Machek <pavel@....cz>
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

On Friday, 24 August 2007 11:02, Pavel Machek wrote:
> 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.

I forgot about it.

I've already sent the 1/4 and 2/4 patches to Andrew, so I'll keep the remaining
two ones in the queue for a couple of days.

Thanks for the ACKs!

Greetings,
Rafael
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