Thanks, it worked! On Mon, Mar 18, 2019 at 6:20 PM Keith Busch <kbusch@xxxxxxxxxx> wrote: > > On Mon, Mar 18, 2019 at 06:14:01PM -0400, Nikhil Sambhus wrote: > > Hi, > > > > On a Linux Kernel 5.0.0+ machine (Ubuntu 16.04) I am using the > > following command as a root user to enable polling for a NVMe SSD > > device. > > > > # echo 1 > /sys/block/nvme2n1/queue/io_poll > > > > I get the following error: > > > > bash: echo: write error: Invalid argument > > > > The current value of io_poll is 0. > > Be sure to turn on the polling queues in the nvme driver. There are none > by default. The kernel parameter to that enable them is: > > nvme.poll_queues=X > > Where 'X' is the number of polling queues. I'd recommend at least 1 per > CPU socket, but more is better. -- Regards, Nikhil P Sambhus "To bug is human, to debug is divine"
