Date: Sun, 9 Dec 2007 08:46:47 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Jiri Slaby <jirislaby@gmail.com>, Gautham R Shenoy <ego@in.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org,
       "Rafael J. Wysocki" <rjw@sisk.pl>,
       Arjan van de Ven <arjan@linux.intel.com>,
       Thomas Gleixner <tglx@linutronix.de>,
       Linux-pm mailing list <linux-pm@lists.linux-foundation.org>
Subject: Re: broken suspend (sched related) [Was: 2.6.24-rc4-mm1]
Message-ID: <20071209074647.GE22981@elte.hu>
References: <20071204211701.994dfce6.akpm@linux-foundation.org> <47595A0A.5000502@gmail.com> <20071207151150.GB24254@elte.hu> <20071207175134.GA18916@elte.hu> <475A5188.6070809@gmail.com> <20071208083939.GD30997@elte.hu> <475A629C.7010408@gmail.com> <20071208152447.GA30270@elte.hu> <475B24F4.3090904@gmail.com>
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* Jiri Slaby <jirislaby@gmail.com> wrote:

> On 12/08/2007 04:24 PM, Ingo Molnar wrote:
> > i'm wondering why it had no effect now
> 
> diff --git a/kernel/cpu.c b/kernel/cpu.c
> index e0d3a4f..a46c252 100644
> --- a/kernel/cpu.c
> +++ b/kernel/cpu.c
> @@ -47,15 +47,21 @@ void __init cpu_hotplug_init(void)
>  }
> 
>  #ifdef CONFIG_HOTPLUG_CPU
> -
> +#include <asm/io.h>
>  void get_online_cpus(void)
>  {
> +       outb(0x20, 0x80);
>         might_sleep();
> +       outb(0x21, 0x80);

ah. If you comment out get_online_cpus()/put_online_cpus() from 
kernel/softlockup.c, does it start working?

Gautham, any ideas?

	Ingo
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