kern/148464: Panic at boot in twa on recent 7-STABLE

[Tim Bishop]

>Number:         148464
>Category:       kern
>Synopsis:       Panic at boot in twa on recent 7-STABLE
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Jul 09 08:20:01 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     Tim Bishop
>Release:        FreeBSD 7.3-STABLE amd64
>Organization:
>Environment:
System: FreeBSD paladin.sixth.bishnet.net 7.3-STABLE FreeBSD 7.3-STABLE #18: Tue Jun 8 16:19:07 BST 2010 tdb at paladin.sixth.bishnet.net:/usr/obj/usr/src/sys/PALADIN amd64


	FreeBSD 7.3-STABLE with 3ware 9690SA RAID card.
>Description:
	I updated the kernel from one on approx June 8th to July
	8th. On bootup with the June kernel I see this at bootup:

	3ware device driver for 9000 series storage controllers, version: 3.70.05.001
	twa0: <3ware 9000 series Storage Controller> port 0xb800-0xb8ff mem 0xce000000-0xcfffffff,0xfbfff000-0xfbffffff irq 16 at device 0.0 on pci1
	twa0: [ITHREAD]
	twa0: INFO: (0x15: 0x1300): Controller details:: Model 9690SA-8I, 128 ports, Firmware FH9X 4.04.00.016, BIOS BE9X 4.04.00.003

	With the July kernel I get the following:

	3ware device driver for 9000 series storage controllers, version: 3.70.05.008
	twa0: <3ware 9000 series Storage Controller> port 0xb800-0xb8ff mem 0xce000000-0xcfffffff,0xfbfff000-0xfbffffff irq 16 at device 0.0 on pci1
	twa0: [ITHREAD]
	panic: mtx_init: mtx_lock not aligned for tw_cl_gen_lock:0xffffff800022e0ea cpuid = 0
	KDB: enter: panic
	[thread pid - tid 100000 ]
	Stopped at      kdb_enter_why+0x3d:      movq      $0,0x41c798(%rip)
	db> 

	I'm unsure what the cause is. Rolling back to the June kernel worked.
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: