Hi, I've tried to mlock() a range of an ext4-dax file and got "-ENOMEM" in return. Looking at the code, it seems that this is related to the fact that DAX uses VM_MIXEDMAP and mlock assumes/requires regular page cache. To me it seems that DAX should simply return success in mlock() as all data is always in memory and no swapping is possible. Is this a bug or intentional? Is there a fix planned? Also, the same code path that is used in mlock is also used for MAP_POPULATE (pre-fault pages in mmap) so this flag doesn't work as well (doesn't fail but simply doesn't pre-fault anything). Thanks, Yigal -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
