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Date: Sun, 22 Mar 1998 18:07:54 -0800 (PST)
From: dima@best.net
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Subject: kern/6102: panic: biodone: buffer not busy
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>Number:         6102
>Category:       kern
>Synopsis:       panic: biodone: buffer not busy
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Mar 22 18:10:01 PST 1998
>Last-Modified:
>Originator:     Dima Ruban
>Organization:
Best Internet Communiactions, Inc.
>Release:        FreeBSD 2.2.6-BETA i386
>Environment:

	FreeBSD tick.best.net 2.2.6-BETA FreeBSD 2.2.6-BETA #32: Tue Mar 17
13:08:39 PST 1998     dima@tick.best.net:/src/src/sys/compile/BEST  i386


>Description:

	Once in a while kernel panics with following messages:

	biodone: buffer already done
	biodone: buffer already done
	panic: biodone: buffer not busy

>How-To-Repeat:

	I don't know, how to repeat this problem.
	Here's trace from kdb:

	biodone: buffer already done
	biodone: buffer already done
	panic: biodone: buffer not busy
	Debugger("panic")
	Stopped at      _Debugger+0x35 [/sys/compile/BEST/:52]: movb
	$0,_in_Debugger.
	1
	22
	db> 
	db> trace
	_Debugger(msg=f0113238) at _Debugger+0x35 [/sys/compile/BEST/:52]
	_panic(fmt=f012e8a9) at _panic+0x5a [/sys/compile/BEST/:388]
	_biodone(bp=f45ce3e8) at _biodone+0x30
	[/usr/src/sys/compile/BEST/:1561]
	_scsi_done(xs=f2629f00) at _scsi_done+0x84 [/sys/compile/BEST/:450]
	_ahc_intr(arg=f24c4800) at _ahc_intr+0x1c7 [/sys/compile/BEST/:815]
	Xresume10() at Xresume10+0x2b
	--- interrupt, eip = 0xf01be075, esp = 0xf01dcff8, ebp = 0 ---
	idle_loop() at idle_loop+0x3d
	db> 

	We couldn't get a memory dump from it though:

	db> panic
	panic: from debugger

	dumping to dev 401, offset 524288
	dump ahc0: WARNING no command for scb 3 (cmdcmplt)
	QOUTCNT == 5
	biodone: buffer already done
	panic: biodone: buffer not busy

	dumping to dev 401, offset 524288
	dump device not ready
	Automatic reboot in 15 seconds - press a key on the console to abort
	Rebooting...

>Fix:
	
	Unknown (yet).

>Audit-Trail:
>Unformatted:

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