From owner-freebsd-current  Thu Feb 20 13:52: 7 2003
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To: Martin Blapp <mb@imp.ch>
Subject: Re: Reboot(8) when fsck_ufs is running ? 
Cc: current@freebsd.org
In-Reply-To: Your message of "Sat, 15 Feb 2003 00:50:01 +0100."
             <20030214173731.L44623@cvs.imp.ch> 
Date: Thu, 20 Feb 2003 13:52:03 -0800
From: Kirk McKusick <mckusick@beastie.mckusick.com>
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	Date: Sat, 15 Feb 2003 00:50:01 +0100 (CET)
	From: Martin Blapp <mb@imp.ch>
	To: current@freebsd.org
	Cc: Kirk McKusick <mckusick@freebsd.org>
	Subject: Reboot(8) when fsck_ufs is running ?

	Hi all,

	I don't know what the behaviour should be, but when I try
	to reboot a box which has fsck_ufs is running, it doesn't
	reboot and I have to powercycle it. Looks also like it
	just hangs.

	Do you experience the same at your side ? Shouln't we
	abort the fsck_ufs and reboot ?

	Martin

Assuming that you are running fsck_ufs as part of a background
fsck, the problem is probably that the fsck_ufs is in the midst
of creating a snapshot. At the moment, snapshot creation is not
interruptable, so the reboot is waiting for it to finish. I am
presently investigating a bug which causes snapshots of filesystems
bigger than about 250Gb to hang the kernel due to buffer starvation.

	Kirk McKusick

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