NetBSD Problem Report #60623

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Date: Thu, 20 Aug 2026 18:03:56 +0000 (UTC)
From: campbell+netbsd@mumble.net
Reply-To: campbell+netbsd@mumble.net
To: gnats-bugs@NetBSD.org
Subject: warning fatigue: fss0: snapshot invalid: forced by unmount
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X-From4GNATS: "campbell+netbsd@mumble.net via gnats" <gnats-admin@NetBSD.org>

>Number:         60623
>Category:       kern
>Synopsis:       warning fatigue: fss0: snapshot invalid: forced by unmount
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Aug 20 18:05:00 +0000 2026
>Last-Modified:  Thu Aug 20 18:10:01 +0000 2026
>Originator:     Taylor R Campbell
>Release:        current, 11, 10, 9, ...
>Organization:
The NetBSD Snapshoutation, Esquerr.
>Environment:
>Description:

	If an fss(4) snapshot is configured when the system is shut
	down, the kernel prints a scary error message

		fss0: snapshot invalid: forced by unmount

	to the console, even though (as far as I can tell) there is
	nothing wrong.

>How-To-Repeat:

	1. fssconfig fss0 / /.snap
	2. shutdown -p now

>Fix:

	Either this message should be less scary and not printed with
	aprint_error_dev, or it should be removed altogether to avoid
	warning fatigue.

>Audit-Trail:
From: Taylor R Campbell <riastradh@NetBSD.org>
To: gnats-bugs@NetBSD.org, netbsd-bugs@NetBSD.org
Cc: 
Subject: Re: kern/60623: warning fatigue: fss0: snapshot invalid: forced by unmount
Date: Thu, 20 Aug 2026 18:08:17 +0000

 > 	If an fss(4) snapshot is configured when the system is shut
 > 	down, the kernel prints a scary error message
 > 
 > 		fss0: snapshot invalid: forced by unmount
 > 
 > 	to the console, even though (as far as I can tell) there is
 > 	nothing wrong.

 Correction: If an fss(4) snapshot is configured _and mounted_ [...]

 > 	1. fssconfig fss0 / /.snap
 > 	2. shutdown -p now

 Correction:

 	1. fssconfig fss0 / /.snap
 	2. mount /dev/fss0 /mnt
 	3. shutdown -p now

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