2010/1/19 Matthias Kaehlcke <matthias@xxxxxxxxxxxx>: > El Tue, Jan 19, 2010 at 05:20:53PM +0800 Johnny Hung ha dit: > >> I have build an embedded Linux system and rootfs is a ramdisk. Ramdisk >> rootfs resides in memory so modify files is non-effective after a >> reboot. Some directories in rootfs, like /etc, /usr, ... are contain >> many application configuration files and I want to mount it to jffs2 >> flash filesysyem so it will take effect after a reboot. Is it >> possible? > How to do it? The ramdisk rootfs is ext2 filesystem and I try, mount /mnt/mtd/etc /etc Try to modify /etc/ files is not works. > yes, this is possible > >> I know the flash has write times limited so the log files >> (syslogd/klogd) should not store in flash. In general, how to deploy >> root file system for embedded linux with flash storage? > > - add jffs2 support to your kernel > - create your image using mkfs.jffs2 from mtd-utils > - flash the image > - specify the rootfs partition and type in the bootargs of the kernel The above procedure is to create a jffs2 rootfs image but I prefer to use ramdisk rootfs. I think the rootfs is build as ramdisk and some configurable file is store in jffs2 flash. Thank your reply. BRs, H. Johnny > > for further information i recommend the lecture of > http://free-electrons.com/doc/flash-filesystems.pdf > > depending on your requirements/size of the rootfs partitions UBIFS > might be an option to consider > > -- > Matthias Kaehlcke > Embedded Linux Developer > Barcelona > > El trabajo es el refugio de los que no tienen nada que hacer > (Oscar Wilde) > .''`. > using free software / Debian GNU/Linux | http://debian.org : :' : > `. `'` > gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `- > -- To unsubscribe from this list: send the line "unsubscribe linux-embedded" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
