问题
I am working on a testing tool for nvme-cli(written in c and can run on linux).
For SSD validation purpose, we are actually looking for sending I/O commands to a particular Submission queue(IO Queue pair). We needed this because we wanted threading, but for threading to happen we need to send I/O requests to different queues else the I/O requests would be processed serially.
So is there any way in ioctl() where we can specify the Submission queue IDs?
Here is how a nvme IO is requested with ioctl()
ioctl(fd, NVME_IOCTL_SUBMIT_IO, &io);
This invokes nvme_ioctl() in the driver here!
nvme_ioctl() intern invokes the nvme_submit_io() Function here!
nvme_submit_io() has the a parameter struct nvme_ns *ns where the structure has a field name queueview here!
I wanted to know if we can invoke ioctl() with a additional new parameter queue_id which is to be assigned to queue field of struct nvme_ns *ns in the nvme_submit_io() function.
Can I know if we can do like this?
If yes, please give me some brief steps. If NO, please suggest me any possible solution.
Since i am new to nvme or ioctl, please correct me if i am wrong.
来源：https://stackoverflow.com/questions/47918060/is-there-any-way-for-ioctl-in-linux-to-specify-submission-queue-id-for-a-nvme