Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 12 Feb 2002 17:17:11 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 12 Feb 2002 17:17:01 -0500 Received: from garrincha.netbank.com.br ([200.203.199.88]:15116 "HELO netbank.com.br") by vger.kernel.org with SMTP id ; Tue, 12 Feb 2002 17:16:50 -0500 Date: Tue, 12 Feb 2002 20:16:40 -0200 (BRST) From: Rik van Riel X-X-Sender: To: Alan Cox Cc: William Lee Irwin III , Subject: Re: File BlockSize In-Reply-To: Message-ID: X-spambait: aardvark@kernelnewbies.org X-spammeplease: aardvark@nl.linux.org MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 12 Feb 2002, Alan Cox wrote: > > > This sounds like fairly severe memory fragmentation, which seems more > > > worrisome to me than blocksize constraints. Should I look into that? > > > > Sorry for being dense, but I don't see why an 8 kB block would > > need to occupy 2 contiguous pages in ram. > > Because all the kernel code knows that you can add a constant to the > base of a buffer to get anywhere in that block. Also the one buffer > per two page case isnt handled either Is this still the case after blkdev-in-pagecache ? Rik -- "Linux holds advantages over the single-vendor commercial OS" -- Microsoft's "Competing with Linux" document http://www.surriel.com/ http://distro.conectiva.com/ - 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/