From neversetsun@ustc.edu Fri Feb 29 07:27:38 2008 Received: from smtp.ustc.edu.cn ([202.38.64.16] helo=ustc.edu.cn) by stoneboat.aleph1.co.uk with smtp (Exim 4.63) (envelope-from ) id 1JUzeN-0005X4-V4 for yaffs@lists.aleph1.co.uk; Fri, 29 Feb 2008 07:27:38 +0000 Received: (eyou send program); Fri, 29 Feb 2008 15:27:30 +0800 Message-ID: <404270050.16970@ustc.edu.cn> X-EYOUMAIL-SMTPAUTH: shizheng@mail.ustc.edu.cn Received: from unknown (HELO [127.0.0.1]) (202.38.79.82) by 202.38.64.8 with SMTP; Fri, 29 Feb 2008 15:27:30 +0800 Message-ID: <47C7B390.9060703@ustc.edu> Date: Fri, 29 Feb 2008 15:26:08 +0800 From: "shizheng@Alumni" User-Agent: Thunderbird 2.0.0.12 (Windows/20080213) MIME-Version: 1.0 To: manningc2@actrix.gen.nz, yaffs@lists.aleph1.co.uk Content-Type: text/plain; charset=GB2312 Content-Transfer-Encoding: 7bit X-SA-Exim-Connect-IP: 202.38.64.16 X-SA-Exim-Mail-From: neversetsun@ustc.edu X-Spam-Checker-Version: SpamAssassin 3.2.3 (2007-08-08) on stoneboat.aleph1.co.uk X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00, MSGID_FROM_MTA_HEADER,SPF_HELO_PASS autolearn=no version=3.2.3 X-SA-Exim-Version: 4.2.1 (built Tue, 09 Jan 2007 17:23:22 +0000) X-SA-Exim-Scanned: Yes (on stoneboat.aleph1.co.uk) Subject: [Yaffs] [Yaffs2]Tnode tallness and the maximum chunk id X-BeenThere: yaffs@lists.aleph1.co.uk X-Mailman-Version: 2.1.9 Precedence: list List-Id: Discussion of YAFFS NAND flash filesystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 29 Feb 2008 07:27:38 -0000 Hi, The YAFFS_TNODES_MAX_LEVEL is 6, so I think the maximum chunk id occupies 3*6+4=22 bits, which evaluates 0x003fffff. But YAFFS_MAX_CHUNK_ID is defined as 0x000fffff, why? I guess maybe it gets a little mess with chunk group size which is usually 2^2. Or do I mistake anything? best wishes, shizheng