re: kern/45305: umount says device busy without any process having current directory in the mount or file open

To: gnats-bugs%NetBSD.org@localhost
Subject: re: kern/45305: umount says device busy without any process having current directory in the mount or file open
From: matthew green <mrg%eterna.com.au@localhost>
Date: Mon, 29 Aug 2011 20:22:20 +1000

what does "fstat" say in this case?  it should report any thing that
is showing an open filesystem.  also, for the killed everything case,
what processes are running?

also, what about "mount -a"?  fstat doesn't report nullfs mounts that
keep a filesystem busy.

this should help track down what is holding the fs open.


.mrg.

References:
- kern/45305: umount says device busy without any process having current directory in the mount or file open
  - From: kretschm

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