On Mon, Aug 11, 2008 at 04:11:12PM +0100, David Woodhouse wrote: > We may well want mkfs tools to use this to mark the whole device as > unwanted before they format it, for example. > > The ioctl takes a pair of uint64_ts, which are start offset and length > in _bytes_. Although at the moment it might make sense for them both to > be in 512-byte sectors, I don't want to limit the ABI to that. http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi?coll=0650&db=man&fname=/usr/share/catman/p_man/cat2/standard/fcntl.z Their F_FREESP does pretty much exactly this. I also like the idea of extending MADV_REMOVE to work on devices which support PUNCH/TRIM/DISCARD, and adding a LINUX_FADV_REMOVE to fadvise. -- Intel are signing my paycheques ... these opinions are still mine "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step." -- 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
