Hi, I am trying to understand difference between xip and o_direct. For XIP, document xip.txt says "instead of keeping data in the page cache, the need to have a page cache copy is eliminated completely. With execute-in-place, read&write type operations are performed directly from/to the memory backed storage device." For O_Direct, " File I/O is done directly to/from user- space buffers. " from manual of open(2) So, are those 2 trying to do the same thing ? The difference I can tell is, XIP option can be used when mounting fs. O_Direct is used in open system-call. Can anybody kindly teach me what are other differences? thank you! Jon -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
