linux-kernel - Re: [patch 3/5] x86: mce: Split timer init

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Message-ID: <4FE14505.9090307@jp.fujitsu.com>
Date:	Wed, 20 Jun 2012 12:35:33 +0900
From:	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Tony Luck <tony.luck@...el.com>,
	Borislav Petkov <borislav.petkov@....com>,
	Chen Gong <gong.chen@...ux.intel.com>, x86@...nel.org,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [patch 3/5] x86: mce: Split timer init

(2012/06/07 6:53), Thomas Gleixner wrote:
> --- tip.orig/arch/x86/kernel/cpu/mcheck/mce.c
> +++ tip/arch/x86/kernel/cpu/mcheck/mce.c
> @@ -1554,23 +1554,28 @@ static void __mcheck_cpu_init_vendor(str
>  	}
>  }
>  
> -static void __mcheck_cpu_init_timer(void)
> +static void mce_start_timer(unsigned int cpu, struct timer_list *t)
>  {
> -	struct timer_list *t = &__get_cpu_var(mce_timer);
>  	unsigned long iv = check_interval * HZ;
>  
> -	setup_timer(t, mce_timer_fn, smp_processor_id());
> +	__this_cpu_write(mce_next_interval, iv);
>  
> -	if (mce_ignore_ce)
> +	if (mce_ignore_ce || !iv)
>  		return;
>  
> -	__this_cpu_write(mce_next_interval, iv);
> -	if (!iv)
> -		return;
>  	t->expires = round_jiffies(jiffies + iv);
>  	add_timer_on(t, smp_processor_id());

add_timer_on(t, cpu) ?

If so, using __this_cpu_write() here is wrong too.

>  }
>  

Thanks,
H.Seto

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