linux-kernel - Re: broken suspend (sched related) [Was: 2.6.24-rc4-mm1]

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Message-ID: <20071209074647.GE22981@elte.hu>
Date:	Sun, 9 Dec 2007 08:46:47 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Jiri Slaby <jirislaby@...il.com>, Gautham R Shenoy <ego@...ibm.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>
Subject: Re: broken suspend (sched related) [Was: 2.6.24-rc4-mm1]


* Jiri Slaby <jirislaby@...il.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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