In message 54964.61.95.208.3.1128590223.squirrel@61.95.208.3 you wrote:
Now the system is up and running well, but i get into some other problem like when copying files to /mnt/jffs2 directory it is taking so much extra time to copy files. But when i was using 4MB flash it was taking 1/4 of this time.
This is off topic *both* on the U-Boot and on the linuxppc-embedded mailing lists. The MTD mailing list would be a much better place for such questions (linux-mtd@lists.infradead.org). But before posting ther make sure to include some detail about your system: type of flash chips used, which versionof the MTD / JFFS2 driver code, which exact kernel version. And make sure to read the instructions at http://www.linux-mtd.infradead.org/mail.html, especially the section about kernel versions http://www.linux-mtd.infradead.org/source.html#kernelversions
Best regards,
Wolfgang Denk