On Fri, 2013-12-06 at 10:59 -0800, Prasanna Ponnada wrote: > I'd like to test raw iSER wire performance (similar to this: > http://permalink.gmane.org/gmane.linux.scsi.target.devel/4002) and was > wondering how I could create a ramdisk to act as a null device? Any > pointers would be greatly helpful. > This is still a bit tricky to do from userspace, so I'd recommend the following small patch to set NULLIO for all ramdisks. --nab diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c index 4ffe5f2..45bba9e 100644 --- a/drivers/target/target_core_rd.c +++ b/drivers/target/target_core_rd.c @@ -226,6 +226,7 @@ static int rd_configure_device(struct se_device *dev) pr_debug("Missing rd_pages= parameter\n"); return -EINVAL; } + rd_dev->rd_flags |= RDF_NULLIO; ret = rd_build_device_space(rd_dev); if (ret < 0) -- 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
