Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261318AbVABUZp (ORCPT ); Sun, 2 Jan 2005 15:25:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261321AbVABUZo (ORCPT ); Sun, 2 Jan 2005 15:25:44 -0500 Received: from holomorphy.com ([207.189.100.168]:36245 "EHLO holomorphy.com") by vger.kernel.org with ESMTP id S261318AbVABUZj (ORCPT ); Sun, 2 Jan 2005 15:25:39 -0500 Date: Sun, 2 Jan 2005 12:25:29 -0800 From: William Lee Irwin III To: Andrew Morton Cc: Jens Axboe , riel@redhat.com, andrea@suse.de, linux-kernel@vger.kernel.org, Robert_Hentosh@Dell.com, kernel@kolivas.org Subject: Re: [PATCH][1/2] adjust dirty threshold for lowmem-only mappings Message-ID: <20050102202529.GK29332@holomorphy.com> References: <20041224160136.GG4459@dualathlon.random> <20041224164024.GK4459@dualathlon.random> <20041225020707.GQ13747@dualathlon.random> <20041225190710.GZ771@holomorphy.com> <20050102151147.GA1930@suse.de> <20050102120324.2b52a848.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050102120324.2b52a848.akpm@osdl.org> 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 Content-Length: 1085 Lines: 24 At some point in the past, I wrote: >>> 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. Jens Axboe wrote: >> It should be lifted for block devices, it doesn't make any sense. On Sun, Jan 02, 2005 at 12:03:24PM -0800, Andrew Morton wrote: > Before we can permit blockdev pagecache to use highmem we must convert > every piece of code which accesses the cache to use kmap/kmap_atomic. If > you grep around for b_data you'll see there are a lot of such places. > Probably the migration could be done on a per-fs basis. I'd regard such an incremental conversion strategy as a prerequisite, and would have no trouble working within such constraints. -- wli - 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/