linux-kernel - Re: [RFC][PATCH] update /proc/sys/vm/drop

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Message-Id: <20100915135016.C9F1.A69D9226@jp.fujitsu.com>
Date:	Wed, 15 Sep 2010 13:53:10 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	lnxninja@...ux.vnet.ibm.com
Subject: Re: [RFC][PATCH] update /proc/sys/vm/drop_caches documentation

> >  ==============================================================
> >  
> > diff -puN fs/drop_caches.c~update-drop_caches-documentation fs/drop_caches.c
> > --- linux-2.6.git/fs/drop_caches.c~update-drop_caches-documentation	2010-09-14 15:44:29.000000000 -0700
> > +++ linux-2.6.git-dave/fs/drop_caches.c	2010-09-14 15:58:31.000000000 -0700
> > @@ -47,6 +47,8 @@ int drop_caches_sysctl_handler(ctl_table
> >  {
> >  	proc_dointvec_minmax(table, write, buffer, length, ppos);
> >  	if (write) {
> > +		WARN_ONCE(1, "kernel caches forcefully dropped, "
> > +			     "see Documentation/sysctl/vm.txt\n");
> 
> Documentation updeta seems good but showing warning seems to be meddling to me.

Agreed.

If the motivation is blog's bogus rumor, this is no effective. I easily
imazine they will write "Hey, drop_caches may output strange message, 
but please ignore it!".


	Libenter homines id quod volunt credunt.
		Gaius Julius Caesar "Commentarii de Bello Gallico" 3-18



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