Hello! As mentioned in http://www.yaffs.net/yaffs-porting-guide, the read/write operation are in yaffs_mtdif.c. Is it right? Is it the only process or there is another process(with kernel modules for example) too? Thanks ----- Forwarded Message ----- From: S. K. To: "yaffs@lists.aleph1.co.uk" Sent: Wednesday, July 25, 2012 11:04 AM Subject: read and write operation Good Day! I am looking for the serial operations that happen when read and write operation use in a ubuntu system that use yaffs2 as the filesystem. As I understood, for these operations: os tells to the vfs and the vfs tells to the yaffs to do read or write, then yaffs_file_operations in the yaffs_vfs_multi looks at its structure and call do_sync_read or do_sync_write. these files exist in the kernel and do the read and write operation. Is there any thing I missing? Is this sequence explained correctly? If not, would you explain the correct one? Thanks