On 10/28/2016 03:32 AM, Linus Walleij wrote:
The patch to enable MQ looks like this: https://git.kernel.org/cgit/linux/kernel/git/linusw/linux-stericsson.git/commit/?h=mmc-mq&id=8f79b527e2e854071d8da019451da68d4753f71d
BTW, another viable "hack" for the depth issue would be to expose more than one hardware queue. It's meant to map to a distinct submission region in the hardware, but there's nothing stopping the driver from using it differently. Might not be cleaner than just increasing the queue depth on a single queue, though. That still won't solve the issue of lying about it and causing IO scheduler confusion, of course. Also, 4.8 and newer have support for BLK_MQ_F_BLOCKING, if you need to block in ->queue_rq(). That could eliminate the need to offload to a kthread manually. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
