Hello, as Jia-Ju Bai pointed out, match_int() can sleep due to GFP_KERNEL allocation. Change ext2 mount option parsing so that it does not happen under sbi->s_lock spinlock. That is a reasonable change anyway and as a sideeffect we don't have to restore old options if new options cannot be used for some reason. If nobody objects, I'll push these patches through my tree. Honza