Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261259AbVEOVgX (ORCPT ); Sun, 15 May 2005 17:36:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261261AbVEOVgX (ORCPT ); Sun, 15 May 2005 17:36:23 -0400 Received: from pollux.ds.pg.gda.pl ([153.19.208.7]:39947 "EHLO pollux.ds.pg.gda.pl") by vger.kernel.org with ESMTP id S261259AbVEOVgT (ORCPT ); Sun, 15 May 2005 17:36:19 -0400 Date: Sun, 15 May 2005 23:38:32 +0200 From: Tomasz Torcz To: linux-kernel@vger.kernel.org Subject: Re: Disk write cache (Was: Hyper-Threading Vulnerability) Message-ID: <20050515213832.GB24179@irc.pl> Mail-Followup-To: linux-kernel@vger.kernel.org References: <1115963481.1723.3.camel@alderaan.trey.hu> <20050515145241.GA5627@irc.pl> <200505151121.36243.gene.heskett@verizon.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200505151121.36243.gene.heskett@verizon.net> User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1098 Lines: 24 On Sun, May 15, 2005 at 11:21:36AM -0400, Gene Heskett wrote: > >FreeBSD used these barriers (FLUSH CACHE command) long time ago. > > > >There are rumors that some disks ignore FLUSH CACHE command just to > > get higher benchmarks in Windows. But I haven't heart of any proof. > > Does anybody know, what companies fake this command? > > > >From a story I read elsewhere just a few days ago, this problem is > virtually universal even in the umpty-bucks 15,000 rpm scsi server > drives. It appears that this is just another way to crank up the > numbers and make each drive seem faster than its competition. Probably you talking about this: http://www.livejournal.com/~brad/2116715.html It has hit Slashdot yesterday. -- Tomasz Torcz "God, root, what's the difference?" zdzichu@irc.-nie.spam-.pl "God is more forgiving." - 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/