linux-kernel - Re: ACPI: S4 disappeared [mmotm 2009-02-10-16-35]

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Message-Id: <200902112222.22470.rjw@sisk.pl>
Date:	Wed, 11 Feb 2009 22:22:21 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Jiri Slaby <jirislaby@...il.com>, linux-kernel@...r.kernel.org,
	mm-commits@...r.kernel.org, Len Brown <lenb@...nel.org>,
	linux-acpi@...r.kernel.org,
	"Linux-pm mailing list" <linux-pm@...ts.linux-foundation.org>,
	Pavel Machek <pavel@...e.cz>
Subject: Re: ACPI: S4 disappeared [mmotm 2009-02-10-16-35]

On Wednesday 11 February 2009, Ingo Molnar wrote:
> 
> * Rafael J. Wysocki <rjw@...k.pl> wrote:
> 
> > On Wednesday 11 February 2009, Jiri Slaby wrote:
> > > On 02/11/2009 09:51 AM, Jiri Slaby wrote:
> > > > On 02/11/2009 01:36 AM, akpm@...ux-foundation.org wrote:
> > > >> The mm-of-the-moment snapshot 2009-02-10-16-35 has been uploaded
> > > > 
> > > > Hi,
> > > > 
> > > > I've found out, that S4 disappeared in this release, in comparison to mmotm
> > > > based on 2.6.29-rc2:
> > > > -ACPI: (supports S0 S1 S3 S4 S5)
> > > > +ACPI: (supports S0 S1 S3 S5)
> > > > 
> > > > Any ideas what could have caused this?
> > > 
> > > I think this one
> > > ARCH_HIBERNATION_POSSIBLE=n
> > > because
> > > SMP=y
> > > since
> > >  config ARCH_HIBERNATION_POSSIBLE
> > >         def_bool y
> > > -       depends on !SMP || !X86_VOYAGER
> > > +       depends on !SMP
> > > 
> > > The condition was wrong, ok, anyway it worked. Would
> > > depends on !SMP || EXPERIMENTAL
> > > make sense? The smp is handled in disable_nonboot_cpus manner, right?
> > 
> > Ah, someone removed X86_VOYAGER and left this gem.  I guess that went in
> > through -tip (Ingo CCed).
> > 
> > After removing X86_VOYAGER, ARCH_HIBERNATION_POSSIBLE should always be set
> > on x86.  Just make it
> > 
> > config ARCH_HIBERNATION_POSSIBLE
> >          def_bool y
> 
> heh, indeed :-) Fixed via the commit below.

Would it be viable to fold that into aced3ce, so that bisectability is not
broken between the two?

Rafael

 
> ---------------->
> From 17993b49b1f540aace8e9b4242530d0b3376eb2a Mon Sep 17 00:00:00 2001
> From: Ingo Molnar <mingo@...e.hu>
> Date: Wed, 11 Feb 2009 17:20:51 +0100
> Subject: [PATCH] x86: make hibernation always-possible
> 
> This commit:
> 
>   aced3ce: x86/Voyager: remove HIBERNATION Kconfig quirk
> 
> Made hibernation only available on UP - instead of making it available
> on all of x86. Fix it.
> 
> Reported-by: Jiri Slaby <jirislaby@...il.com>
> Signed-off-by: Ingo Molnar <mingo@...e.hu>
> ---
>  arch/x86/Kconfig |    1 -
>  1 files changed, 0 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 4a27aa4..148c112 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -140,7 +140,6 @@ config HAVE_CPUMASK_OF_CPU_MAP
>  
>  config ARCH_HIBERNATION_POSSIBLE
>  	def_bool y
> -	depends on !SMP
>  
>  config ARCH_SUSPEND_POSSIBLE
>  	def_bool y
--
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