From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from gw-nam4.philips.com ([161.88.253.58]) by canuck.infradead.org with esmtp (Exim 4.62 #1 (Red Hat Linux)) id 1Fsbid-0005Bi-PA for linux-mtd@lists.infradead.org; Tue, 20 Jun 2006 04:36:32 -0400 Message-ID: <08c601c69444$968a2280$de1e55a1@code1.emi.philips.com> From: "Balaji" To: "Davide CASCONE" , References: <000601c69443$1c7de450$253682a4@nap.st.com> Subject: Re: JFFS2 mounting performance improvement Date: Tue, 20 Jun 2006 14:06:13 +0530 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Reply-To: Balaji List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Best Regards ==================================== Balaji Kadloor Philips Semiconductors Division (HIC-B) Philips Innovation Campus 1 Murphy Rd, Ulsoor, Bangalore - 560008, INDIA Tel: (91)-80-25579000 X2269, Fax: (91)-80-25560580 ==================================== " Success doesn't go to the Faster or the Stonger Man. Sooner or Later,the man who wins is the man who thinks HE CAN " ----- Original Message ----- From: "Davide CASCONE" To: Sent: Tuesday, June 20, 2006 1:55 PM Subject: JFFS2 mounting performance improvement > > It seems that during the JFFS2 mounting, the file system uses the function cfi_intelext_point (in jffs2_scan_medium function) to point to the flash memory. This function refers to the flash memory using the virtual address (map->virt). But if the flash is cached and the burst mode is enabled, it should be better to refer to the flash with the address map->cached (in the same way of cfi_intelext_read function, that calls the map_copy_from function, in which there is a check to verify if the flash is cached). This improves in a considerable way the performance during the mounting phase, reducing the mounting time. > What do you think about? Do you agree with me? Do you know if there are other points in JFFS2 code that uses the virtual address map->virt instead of map->cached. > > Best Regards, > Davide > > > > > > ______________________________________________________ > Linux MTD discussion mailing list > http://lists.infradead.org/mailman/listinfo/linux-mtd/