Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262639AbVCSQ3V (ORCPT ); Sat, 19 Mar 2005 11:29:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262631AbVCSQ3V (ORCPT ); Sat, 19 Mar 2005 11:29:21 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:13223 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S262633AbVCSQ1s (ORCPT ); Sat, 19 Mar 2005 11:27:48 -0500 Subject: Re: [PATCH 2.4.30-pre3] x86_64: pci_alloc_consistent() match 2.6 implementation From: Arjan van de Ven To: Matt Domsch Cc: ak@suse.de, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org In-Reply-To: <20050319141634.GA17045@lists.us.dell.com> References: <20050318212344.GC26112@lists.us.dell.com> <1111212585.6291.41.camel@laptopd505.fenrus.org> <20050319141634.GA17045@lists.us.dell.com> Content-Type: text/plain Date: Sat, 19 Mar 2005 17:27:39 +0100 Message-Id: <1111249660.8446.19.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 (2.0.2-3) Content-Transfer-Encoding: 7bit X-Spam-Score: 4.1 (++++) X-Spam-Report: SpamAssassin version 2.63 on pentafluge.infradead.org summary: Content analysis details: (4.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.3 RCVD_NUMERIC_HELO Received: contains a numeric HELO 1.1 RCVD_IN_DSBL RBL: Received via a relay in list.dsbl.org [] 2.5 RCVD_IN_DYNABLOCK RBL: Sent directly from dynamic IP address [80.57.133.107 listed in dnsbl.sorbs.net] 0.1 RCVD_IN_SORBS RBL: SORBS: sender is listed in SORBS [80.57.133.107 listed in dnsbl.sorbs.net] X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1222 Lines: 28 On Sat, 2005-03-19 at 08:16 -0600, Matt Domsch wrote: > On Sat, Mar 19, 2005 at 07:09:45AM +0100, Arjan van de Ven wrote: > > On Fri, 2005-03-18 at 15:23 -0600, Matt Domsch wrote: > > > For review and comment. > > > > > > On x86_64 systems with no IOMMU and with >4GB RAM (in fact, whenever > > > there are any pages mapped above 4GB), pci_alloc_consistent() falls > > > back to using ZONE_DMA for all allocations, even if the device's > > > dma_mask could have supported using memory from other zones. Problems > > > can be seen when other ZONE_DMA users (SWIOTLB, scsi_malloc()) consume > > > all of ZONE_DMA, leaving none left for pci_alloc_consistent() use. > > > > scsi_malloc no longer uses ZONE_DMA nowadays.... > > In 2.4.x it does. scsi_resize_dma_pool() has: > __get_free_pages(GFP_ATOMIC | GFP_DMA, 0); > scsi_init_minimal_dma_pool() has similar. > oh you want to do major changes to the 2.4 tree... sounds like a bad idea to change such vm behavior.. - 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/