Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965361Ab2JXVSz (ORCPT ); Wed, 24 Oct 2012 17:18:55 -0400 Received: from e38.co.us.ibm.com ([32.97.110.159]:55772 "EHLO e38.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964884Ab2JXVSy (ORCPT ); Wed, 24 Oct 2012 17:18:54 -0400 Message-ID: <50885B2E.5050500@linux.vnet.ibm.com> Date: Wed, 24 Oct 2012 14:18:38 -0700 From: Dave Hansen User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120912 Thunderbird/15.0.1 MIME-Version: 1.0 To: Borislav Petkov , Andrew Morton , Michal Hocko , linux-mm@kvack.org, KAMEZAWA Hiroyuki , KOSAKI Motohiro , LKML Subject: Re: [PATCH] add some drop_caches documentation and info messsge References: <20121012125708.GJ10110@dhcp22.suse.cz> <20121023164546.747e90f6.akpm@linux-foundation.org> <20121024062938.GA6119@dhcp22.suse.cz> <20121024125439.c17a510e.akpm@linux-foundation.org> <50884F63.8030606@linux.vnet.ibm.com> <20121024134836.a28d223a.akpm@linux-foundation.org> <20121024210600.GA17037@liondog.tnic> In-Reply-To: <20121024210600.GA17037@liondog.tnic> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Content-Scanned: Fidelis XPS MAILER x-cbid: 12102421-5518-0000-0000-000008B37BFB Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1013 Lines: 22 On 10/24/2012 02:06 PM, Borislav Petkov wrote: > On Wed, Oct 24, 2012 at 01:48:36PM -0700, Andrew Morton wrote: >> Well who knows. Could be that people's vm *does* suck. Or they have >> some particularly peculiar worklosd or requirement[*]. Or their VM >> *used* to suck, and the drop_caches is not really needed any more but >> it's there in vendor-provided code and they can't practically prevent >> it. > > I have drop_caches in my suspend-to-disk script so that the hibernation > image is kept at minimum and suspend times are as small as possible. > > Would that be a valid use-case? Sounds fairly valid to me. But, it's also one that would not be harmed or disrupted in any way because of a single additional printk() during each suspend-to-disk operation. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/