linux-kernel - Re: + i386-time-avoid-pit-smp-lockups.patch added to -mm tree

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Message-Id: <1161265475.11264.7.camel@c-67-180-230-165.hsd1.ca.comcast.net>
Date:	Thu, 19 Oct 2006 06:44:35 -0700
From:	Daniel Walker <dwalker@...sta.com>
To:	linux-kernel@...r.kernel.org
Cc:	johnstul@...ibm.com, ak@...e.de, mingo@...e.hu, tglx@...utronix.de
Subject: Re: + i386-time-avoid-pit-smp-lockups.patch added to -mm tree

On Wed, 2006-10-11 at 14:26 -0700, akpm@...l.org wrote:

> diff -puN arch/i386/kernel/i8253.c~i386-time-avoid-pit-smp-lockups arch/i386/kernel/i8253.c
> --- a/arch/i386/kernel/i8253.c~i386-time-avoid-pit-smp-lockups
> +++ a/arch/i386/kernel/i8253.c
> @@ -109,7 +109,7 @@ static struct clocksource clocksource_pi
>  
>  static int __init init_pit_clocksource(void)
>  {
> -	if (num_possible_cpus() > 4) /* PIT does not scale! */
> +	if (num_possible_cpus() > 1) /* PIT does not scale! */
>  		return 0;
>  

Can we ifdef some code here on CONFIG_SMP . It bugs me that there just
dead code laying around on smp systems.

Daniel

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