Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 5 Feb 2001 12:30:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 5 Feb 2001 12:30:49 -0500 Received: from router-100M.swansea.linux.org.uk ([194.168.151.17]:18693 "EHLO the-village.bc.nu") by vger.kernel.org with ESMTP id ; Mon, 5 Feb 2001 12:30:40 -0500 Subject: Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound event wait /notify + callback chains To: sct@redhat.com (Stephen C. Tweedie) Date: Mon, 5 Feb 2001 17:29:47 +0000 (GMT) Cc: alan@lxorguk.ukuu.org.uk (Alan Cox), sct@redhat.com (Stephen C. Tweedie), manfred@colorfullife.com (Manfred Spraul), torvalds@transmeta.com (Linus Torvalds), hch@caldera.de (Christoph Hellwig), lord@sgi.com (Steve Lord), linux-kernel@vger.kernel.org, kiobuf-io-devel@lists.sourceforge.net In-Reply-To: <20010205172042.O1167@redhat.com> from "Stephen C. Tweedie" at Feb 05, 2001 05:20:42 PM X-Mailer: ELM [version 2.5 PL1] MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-Id: From: Alan Cox Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > > kiovec_align(kiovec, 512); > > and have it do the bounce buffers ? > > _All_ drivers would have to do that in the degenerate case, because > none of our drivers can deal with a dma boundary in the middle of a > sector, and even in those places where the hardware supports it in > theory, you are still often limited to word-alignment. Thats true for _block_ disk devices but if we want a generic kiovec then if I am going from video capture to network I dont need to force anything more than 4 byte align - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/