From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from ns1.avamax.com ident=[Nr5vDeL1yv+iotSxIyOCiRovoS6NUIpI]) by pentafluge.infradead.org with esmtp (Exim 4.30 #5 (Red Hat Linux)) id 1AgFI9-00050F-9z for linux-mtd@lists.infradead.org; Tue, 13 Jan 2004 03:32:33 +0000 Received: from leonnb (pc26 [10.10.20.26]) by mioserv.miotech.com.tw (8.11.6/8.11.0) with SMTP id i0D3UHn30061 for ; Tue, 13 Jan 2004 11:30:17 +0800 Message-ID: <002201c3d985$8ff790f0$1a140a0a@leonnb> From: =?big5?B?qky3TrW+?= To: Date: Tue, 13 Jan 2004 11:30:16 +0800 MIME-Version: 1.0 Content-Type: text/plain; charset="big5" Content-Transfer-Encoding: 7bit Subject: nand flash driver problem List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi all, I am using JFFS2+MTD nand driver(uClinux Full Source Distribution 20030909) to mount Samsung 16MB Nand flash. It looks ok except writing time(It costs about 40seconds for copying a 200KB file to Nand flash). Even I patch uClinux by New JFFS2+MTD nand driver(mtd-snapshot-20031217) , I still get the same result. But I measure the actually time that Nand flash erasing and writing one page is no more than 1ms. I also do another test for reading or writing Nand flash by MTD block driver and it is ok (I mean reading or writing 200KB data from/to Nand flash is not more than 1 second). So I don't know what the problem is. Do anyone meet the similar problem or any idea? Thanks Lys