re: kern/56329: nvme(4) takes long time to umount

[matthew green <mrg%eterna.com.au@localhost>]

>  To me this doesn't look like a regression and recycling ~570000 vnodes
>  per second looks ok.

it definiately feels like it got slower sometime in the last
6mo-2 years.  it sure didn't take 10s of seconds to reboot
because unmounting root took so long before:

[ 2943701.7107086] unmounting 0xffff00000065b000 / (/dev/ld4a)...
[ 2943725.4316875] unmounting done

this was just now, on a system up ~34 days.


i'll see if i can reproduce this on a system with both netbsd-9
and -current installed.


.mrg.