NetBSD Problem Report #46892

From campbell@mumble.net  Mon Sep  3 02:32:54 2012
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Date: Mon,  3 Sep 2012 02:32:47 +0000 (UTC)
From: Taylor R Campbell <campbell+netbsd@mumble.net>
Reply-To: Taylor R Campbell <campbell+netbsd@mumble.net>
To: gnats-bugs@gnats.NetBSD.org
Subject: panic on `raidctl -u raid0' during reconstruction
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>Number:         46892
>Category:       kern
>Synopsis:       panic on `raidctl -u raid0' during reconstruction
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Sep 03 02:35:00 +0000 2012
>Originator:     Taylor R Campbell <campbell+netbsd@mumble.net>
>Release:        NetBSD 6.99.10 from earlier this month
>Organization:
>Environment:
Architecture: amd64
Machine: amd64
>Description:

	I configured raid0 with a mirror of wd0 and wd1 following the
	guide in <http://www.NetBSD.org/docs/guide/en/chap-rf.html>.

	I failed wd0 with `raidctl -f /dev/wd0a raid0', began
	reconstruction with `raidctl -R /dev/wd0a raid0', and then
	tried to stop the reconstruction.  `raidctl -f /dev/wd0a raid0'
	didn't do it, so I tried `raidctl -u raid0', at which point the
	system panicked (ten-fingered stack trace, and I'm too tired to
	copy down everything, but this should be good enough):

		# raidctl -u raid0
		raid0: waiting for reconstruction to stop...
		raid0: reconstruction failed.
		panic: pool_destroy: pool busy: still out: 7
		...
		pool_destroy
		rf_ShutdownList() at netbsd:rf_ShutdownList+0x27
		rf_UnconfigureArray
		rf_Shutdown
	        raid_detach
		config_detach
		raidioctl


>How-To-Repeat:

	raidctl -f /dev/wd0a raid0
	raidctl -R /dev/wd0a raid0
	raidctl -u raid0

>Fix:

	Yes, please!

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