I am Namjae Jeon and I am working for samsung VD division. I am currently in-charge of linux filesystem in kernel team. I developed flash driver like OneNAND, SLC/MLC pure nand to control in the past before moving onto filesystems, So I started to do opensource community behaivor for flash driver like eMMC, UFS. And I have contributed numerous patches for filesystems like Ext4, XFS, f2fs, fat, writeback, UDF etc. and also have the ownership to Samsung’s NTFS filesystem driver. I have also introduced new feature - collapse range/insert range flags in fallocate system call and file freeze, ioc_mov_data for Ext4 and XFS Filesystem. At present, I spend most time to work In-kernel cifs server that introudced soon.