linux-kernel - Re: [RFC] merge 32/64 bits realmode wakeup code

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Message-Id: <201101292215.57292.rjw@sisk.pl>
Date:	Sat, 29 Jan 2011 22:15:57 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	matthieu castet <castet.matthieu@...e.fr>
Cc:	Linux Kernel list <linux-kernel@...r.kernel.org>,
	linux-acpi@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org
Subject: Re: [RFC] merge 32/64 bits realmode wakeup code

On Saturday, January 29, 2011, matthieu castet wrote:
> Rafael J. Wysocki a écrit :
> > On Thursday, January 27, 2011, matthieu castet wrote:
> >> Hi,
> >>
> >> this patch merge 32 and 64 realmode wakeup code :
> >> - this mean less ifdef in code
> >> - we could remove now unused field in wakeup_header (pmode_*)
> >> - this allow to set the first 1 MB NX.
> >>
> >> Do you think it is safe on all X86 32 bit machine ?
> >>
> >> Matthieu
> >>
> >>
> >> Signed-off-by: Matthieu CASTET <castet.matthieu@...e.fr>
> > 
> > It _looks_ sane, but it will require some serious testing.  I'm not sure,
> > though, if we can get enough testing coverage without actually committing
> > that change.
> > 
> > How much testing has it received so far?
> > 
> Not too much only qemu with 1 and 2 core and a laptop with 1 cpu.
> 
> Please note that with this patch we can also remove the gdt, idt, ldt stuff from 
> arch/x86/kernel/acpi/wakeup_32.S

That's correct, but those changes can wait.  The most urgent thing is to fix
the resume regression at hand.  I guess we should ask the reporter's in
https://bugzilla.kernel.org/show_bug.cgi?id=27472 to test that patch, right?

Rafael
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