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Date: Wed, 22 Mar 2006 10:27:17 -0800
From: Ashok Raj <ashok.raj@intel.com>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Ashok Raj <ashok.raj@intel.com>, akpm@osdl.org,
       Peter Williams <pwil3058@bigpond.net.au>,
       Linus Torvalds <torvalds@osdl.org>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Pavel Machek <pavel@suse.cz>
Subject: Re: Linux v2.6.16
Message-ID: <20060322102717.A12901@unix-os.sc.intel.com>
References: <Pine.LNX.4.64.0603192216450.3622@g5.osdl.org> <200603221839.41867.rjw@sisk.pl> <20060322095457.A12334@unix-os.sc.intel.com> <200603221911.06576.rjw@sisk.pl>
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On Wed, Mar 22, 2006 at 07:11:05PM +0100, Rafael J. Wysocki wrote:
> > It might help to explain why this would break your swsusp with SMP work?
> 
> On SMP systems swsusp (suspend in general, AFAICT) uses the disable_nonboot_cpus()
> function defined in kernel/power/smp.c, which calls cpu_down() that is only
> defined if CONFIG_HOTPLUG_CPU is set.  We can't suspend and resume SMP systems
> reliably without it.
> 
I understand the needs of swsusp, but no one took away CONFIG_HOTPLUG_CPU away... 
just that you need to also enable CONFIG_GENERICARCH to get it to work reliably, and
not see that printk... nothing else..

Iam still confused why you think swsusp wont work...

with that patch, try

CONFIG_X86_PC=n
CONFIG_GENERICARCH=y
CONFIG_HOTPLUG_CPU=y
...

<whatever swssusp needs>=y

and see if thinks work out for you?

-- 
Cheers,
Ashok Raj
- Open Source Technology Center
-
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