linux-kernel - Re: [patch] drop_caches: add some documentation and info message

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Message-ID: <52F51E19.9000406@redhat.com>
Date:	Fri, 07 Feb 2014 12:55:37 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Johannes Weiner <hannes@...xchg.org>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	Dave Hansen <dave@...1.net>, Michal Hocko <mhocko@...e.cz>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [patch] drop_caches: add some documentation and info message

On 02/07/2014 12:40 PM, Johannes Weiner wrote:

> @@ -59,6 +60,9 @@ int drop_caches_sysctl_handler(ctl_table *table, int write,
>   	if (ret)
>   		return ret;
>   	if (write) {
> +		printk_ratelimited(KERN_INFO "%s (%d): dropped kernel caches: %d\n",
> +				   current->comm, task_pid_nr(current),
> +				   sysctl_drop_caches);
>   		if (sysctl_drop_caches & 1)
>   			iterate_supers(drop_pagecache_sb, NULL);
>   		if (sysctl_drop_caches & 2)
>

Would it be better to print this after the operation
has completed?
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