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

[Martin Husemann <martin%duskware.de@localhost>]

The following reply was made to PR kern/56329; it has been noted by GNATS.

From: Martin Husemann <martin%duskware.de@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/56329: nvme(4) takes long time to umount
Date: Tue, 29 Mar 2022 17:54:31 +0200

 I am not sure this is the same problem (but rumours said for a long time
 that this all is not nvme(4) specific) - but I found a very nice reproducer
 for something that smells the same or at least related issue:
 
  - find a usb stick with a write LED
  - format it from scratch
  - create a msdos FS on it and mount it (I used newfs_msdos -F 32 /dev/rsd0)
  - copy (say) 400 MB of data to the fresh new filesystem
  - umount the filesystem
 
 Now you can watch the usb stick blink in ~1 HZ interval for like 10 minutes.
 
 Martin