[PATCHv2 2/2] nvme: Complete all stuck requests

[Keith Busch]

On Mon, Feb 27, 2017 at 07:27:51PM +0200, Sagi Grimberg wrote:
> OK, I think we can get it for fabrics too, need to figure out how to
> handle it there too.
> 
> Do you have a reproducer?

To repro, I have to run a buffered writer workload then put the system into S3.

This fio job seems to reproduce for me:

  fio --name=global --filename=/dev/nvme0n1 --bsrange=4k-128k --rw=randwrite --ioengine=libaio --iodepth=8 --numjobs=8 --name=foobar

I use rtcwake to test suspend/resume:

  rtcwake -m mem -s 10

Without the patch we'll get stuck after "Disabling non-boot CPUs ..."
when blk-mq waits to freeze some entered queues after nvme was disabled.