behlendorf commented on this pull request.
> @@ -59,6 +59,11 @@ vdev_file_open(vdev_t *vd, uint64_t *psize, uint64_t
> *max_psize,
int error;
/*
+ * Rotational optimizations only make sense on block devices
So under Linux in user space this tuning does appear as
`/sys/block/<blkdev>/queue/rotational`, sadly on the kernel side the helper
function is called `blk_queue_nonrot()`. Which is why this ended up being
named `vdev_nonrot`. I wouldn't mind renaming it to `vdev_rotational`.
While it's true that this entry is called "rotational" when users see this
parameter listed in
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