From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: Support for sectorsizes > 4KB ? Date: Wed, 6 Mar 2002 22:53:01 +0000 (GMT) In-Reply-To: from "Ralf Oehler" at Mar 06, 2002 08:48:29 AM MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-Id: From: Alan Cox Sender: owner-linux-mm@kvack.org Return-Path: To: Ralf Oehler Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Scsi List-ID: > In the not-so-far future there will occure MO media on the market with > 40 to 120 Gigabytes of capacity and sectorsizes of 8 KB and maybe more. > It's called "UDO" technology. > > Is there any way to support block devices with sectors larger than 4KB = > ? The scsi layer itself doesn't mind, but the page caches do. Once your block size exceeds the page size you hit a wall of memory fragmentation issues. Given that M/O media is relatively slow I'd be inclined to say write an sd like driver (smo or similar) which does reblocking and also knows a bit more about other M/O drive properties. Alan -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/