From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 24 May 2002 13:30:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 24 May 2002 13:30:10 -0400 Received: from [209.184.141.163] ([209.184.141.163]:49617 "HELO UberGeek") by vger.kernel.org with SMTP id ; Fri, 24 May 2002 13:30:09 -0400 Subject: Re: [BUG] 2.4 VM sucks. Again From: Austin Gonyou To: "Martin J. Bligh" Cc: Alan Cox , Roy Sigurd Karlsbakk , linux-kernel@vger.kernel.org In-Reply-To: <423360000.1022257916@flay> Content-Type: text/plain Content-Transfer-Encoding: 7bit Organization: X-Mailer: Ximian Evolution 1.1.0.99 (Preview Release) Date: 24 May 2002 12:30:05 -0500 Message-Id: <1022261405.9617.39.camel@UberGeek> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2002-05-24 at 11:31, Martin J. Bligh wrote: > >> I'm not sure exactly what Roy was doing, but we were taking a machine > >> with 16Gb of RAM, and reading files into the page cache - I think we built up > >> 8 million buffer_heads according to slabinfo ... on a P4 they're 128 bytes each, > >> on a P3 96 bytes. > > > > The buffer heads one would make sense. I only test on realistic sized systems. > > Well, it'll still waste valuable memory there too, though you may not totally kill it. > > > Once you pass 4Gb there are so many problems its not worth using x86 in the > > long run > I assume that you mean by "not worth using x86" you're referring to say, degraded performance over other platforms? Well...if you talk price/performance, using x86 is perfect in those terms since you can buy more boxes and have a more fluid architecture, rather than building a monolithic system. Monolithic systems aren't always the best. Just look at Fermilab! > Nah, we just haven't fixed them yet ;-) > > M. > > - > 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/