From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: rakib.mullick@gmail.com
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
akpm@linux-foundation.org, cl@linux.com,
kamezawa.hiroyu@jp.fujitsu.com, mel@csn.ul.ie
Subject: Re: [PATCH] mm, vmstat: Use cond_resched only when !CONFIG_PREEMPT
Date: Tue, 31 May 2011 11:23:21 +0900 [thread overview]
Message-ID: <4DE45119.9040108@jp.fujitsu.com> (raw)
In-Reply-To: <1306774744.4061.5.camel@localhost.localdomain>
> diff --git a/mm/vmstat.c b/mm/vmstat.c
> index 20c18b7..72cf857 100644
> --- a/mm/vmstat.c
> +++ b/mm/vmstat.c
> @@ -461,7 +461,11 @@ void refresh_cpu_vm_stats(int cpu)
> p->expire = 3;
> #endif
> }
> +
> +#ifndef CONFIG_PREEMPT
> cond_resched();
> +#endif
> +
In general, we should avoid #ifdef CONFIG_PREEMPT for maintainancebility as far as possible.
Is there any observable benefit? Can you please demonstrate it?
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next prev parent reply other threads:[~2011-05-31 2:23 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-30 16:59 Rakib Mullick
2011-05-30 23:38 ` KAMEZAWA Hiroyuki
2011-05-31 3:13 ` Rakib Mullick
2011-05-31 3:18 ` KAMEZAWA Hiroyuki
2011-05-31 3:58 ` Rakib Mullick
2011-05-31 4:29 ` KAMEZAWA Hiroyuki
2011-05-31 2:23 ` KOSAKI Motohiro [this message]
2011-05-31 3:19 ` Rakib Mullick
2011-05-31 5:55 ` Minchan Kim
2011-05-31 5:57 ` Minchan Kim
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