NVM and swap device

[Stephen Hemminger]

On Wed, 13 Jan 2016 11:55:41 -0700
Jens Axboe <axboe at fb.com> wrote:

> I'd run something that just beats up on it, reads and writes. If you 
> have fio installed, something ala:
> 
> fio --ioengine=libaio --iodepth=8 --direct=1 --bs=4k 
> --filename=/dev/nvme0n1 --numjobs=4 --norandommap --runtime=1h 
> --time_based=1 --name=reads --rw=randread --name=writes --rw=randwrite
> 
> This will run 4 processes that randomly read from the device, and 4 that 
> randomly write. Replace /dev/nvme0n1 with your swap partition. The test 
> will run for 1 hour.

The fio test ran fine without errors. I am beginning to think it something
unique to how I/O in swap path gets done.

Will turn it back on for swap and see what happens.