On Tue, Jan 15, 2013 at 8:20 AM, Martin Svec <martin.svec@xxxxxxxx> wrote: > AFAIK, full WRITE_SAME support for IBLOCK backends will be in kernel 3.8. The way I understand things, this only works if the underlying block device supports WRITE SAME (ie is a reasonably high-end array). For "normal" block devices, there is no emulation of WRITE SAME without unmap in the target core. -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html