Message-ID: <507C183C.2070106@linux.vnet.ibm.com>
Date: Mon, 15 Oct 2012 07:05:48 -0700
From: Dave Hansen <dave@linux.vnet.ibm.com>
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To: Michal Hocko <mhocko@suse.cz>
CC: linux-mm@kvack.org, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
        KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] add some drop_caches documentation and info messsge
References: <20121012125708.GJ10110@dhcp22.suse.cz>
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On 10/12/2012 05:57 AM, Michal Hocko wrote:
> I would like to resurrect the following Dave's patch. The last time it
> has been posted was here https://lkml.org/lkml/2010/9/16/250 and there
> didn't seem to be any strong opposition. 
> Kosaki was worried about possible excessive logging when somebody drops
> caches too often (but then he claimed he didn't have a strong opinion
> on that) but I would say opposite. If somebody does that then I would
> really like to know that from the log when supporting a system because
> it almost for sure means that there is something fishy going on. It is
> also worth mentioning that only root can write drop caches so this is
> not an flooding attack vector.

Just read through the patch again.  Still looks great to me.

Thanks for bringing it up again, Michal!

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