>>>>> "Bryn" == Bryn M Reeves <bmr@redhat.com> writes: Bryn> I suppose the ideal solution would be to detect whether the Bryn> storage supports one or the other automatically but I don't know Bryn> that there is a way to achieve this right now (TRIM/WRITE_SAME Bryn> possibly but I think the zero page stuff is entirely transparent). The problem with the zero-detection stuff is that it predates all the thin provisioning goo in SCSI and we have no way of enabling automatically. So it would have to be a manual per-device override. However, all the vendors I have talked to prefer to use the standards-based way now that it's there. And that's why I removed the "write zeroes" code path before the original TP support went upstream. It was there in the first few iterations of patches. If people think it's a good idea I'll be happy to wire it back up. I have a new set of TP patches going out shortly. -- Martin K. Petersen Oracle Linux Engineering _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
