Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261258AbVABPNP (ORCPT ); Sun, 2 Jan 2005 10:13:15 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261260AbVABPNO (ORCPT ); Sun, 2 Jan 2005 10:13:14 -0500 Received: from pfepa.post.tele.dk ([195.41.46.235]:39295 "EHLO pfepa.post.tele.dk") by vger.kernel.org with ESMTP id S261258AbVABPNE (ORCPT ); Sun, 2 Jan 2005 10:13:04 -0500 Date: Sun, 2 Jan 2005 16:11:47 +0100 From: Jens Axboe To: William Lee Irwin III Cc: Rik van Riel , Andrea Arcangeli , Andrew Morton , linux-kernel@vger.kernel.org, Robert_Hentosh@Dell.com, Con Kolivas Subject: Re: [PATCH][1/2] adjust dirty threshold for lowmem-only mappings Message-ID: <20050102151147.GA1930@suse.de> References: <20041220125443.091a911b.akpm@osdl.org> <20041224160136.GG4459@dualathlon.random> <20041224164024.GK4459@dualathlon.random> <20041225020707.GQ13747@dualathlon.random> <20041225190710.GZ771@holomorphy.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041225190710.GZ771@holomorphy.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1193 Lines: 30 On Sat, Dec 25 2004, William Lee Irwin III wrote: > On Sat, 25 Dec 2004, Andrea Arcangeli wrote: > >> the first place? If that happens it means you're under a lowmem > >> shortage, something you apparently ruled out when you said > >> lowmem_reserve couldn't help your workload. > > On Sat, Dec 25, 2004 at 12:59:10PM -0500, Rik van Riel wrote: > > Let me explain a 3rd time: > [...] > > If you have any more questions as to why the bug happens, don't > > hesitate to ask and I'll explain you why this problem happens. > > This is an old and well-known problem. > > Lifting the artificial lowmem restrictions on blockdev mappings > (thereby nuking mapping->gfp_mask altogether) would resolve a number of > problems, not that anything making that much sense could ever happen. It should be lifted for block devices, it doesn't make any sense. mapping->gfp_mask is still needed for things like loop though, so it cannot be nuked. -- Jens Axboe - 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/