From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261236AbULYTHa (ORCPT ); Sat, 25 Dec 2004 14:07:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261553AbULYTHa (ORCPT ); Sat, 25 Dec 2004 14:07:30 -0500 Received: from holomorphy.com ([207.189.100.168]:11205 "EHLO holomorphy.com") by vger.kernel.org with ESMTP id S261236AbULYTH0 (ORCPT ); Sat, 25 Dec 2004 14:07:26 -0500 Date: Sat, 25 Dec 2004 11:07:10 -0800 From: William Lee Irwin III To: Rik van Riel Cc: 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: <20041225190710.GZ771@holomorphy.com> References: <20041220125443.091a911b.akpm@osdl.org> <20041224160136.GG4459@dualathlon.random> <20041224164024.GK4459@dualathlon.random> <20041225020707.GQ13747@dualathlon.random> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.6+20040722i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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. -- wli