>Number: 148070
>Category: kern
>Synopsis: panic: _mtx_lock_sleep: recursed on non-recursive mutex XPT
>topology lock @ /usr/src/sys/cam/cam_xpt.c:4814
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Jun 22 17:10:04 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator: Mark Atkinson
>Release: FreeBSD-current Revision: 209398
>Organization:
>Environment:
FreeBSD dl385g5 9.0-CURRENT FreeBSD 9.0-CURRENT #9 r: Tue Jun 22 08:07:09 PDT
2010 r...@dl385g5:/usr/obj/usr/src/sys/DL385G5 amd64
>Description:
camcontrol negotiate causes a recursed on non-recursive mutex panic in xpt.
amd64 GENERIC kernel.
ci...@pci0:70:0:0: class=0x010400 card=0x3234103c chip=0x3230103c rev=0x04
hdr=0x00
vendor = 'Hewlett-Packard Company'
device = 'Smart Array P400 Controller (Smart Array P400 Controller)'
class = mass storage
subclass = RAID
# camcontrol devlist
<COMPAQ RAID 1 VOLUME OK> at scbus0 target 0 lun 0 (pass0,da0)
# camcontrol negotiate 0:0:0 -v
panic: _mtx_lock_sleep: recursed on non-recursive mutex XPT topology lock @
/usr/src/sys/cam/cam_xpt.c:4814
cpuid = 0
KDB: enter: panic
[ thread pid 26183 tid 100161 ]
Stopped at kdb_enter+0x3d: movq $0,0x6d03c0(%rip)
db> bt
Tracing pid 26183 tid 100161 td 0xffffff0048c98b70
kdb_enter() at kdb_enter+0x3d
panic() at panic+0x17b
_mtx_lock_sleep() at _mtx_lock_sleep+0x151
_mtx_lock_flags() at _mtx_lock_flags+0xe1
xptpdperiphtraverse() at xptpdperiphtraverse+0x1c
xptpdrvtraverse() at xptpdrvtraverse+0x43
xpt_action_default() at xpt_action_default+0xbf7
xptioctl() at xptioctl+0x633
devfs_ioctl_f() at devfs_ioctl_f+0x76
kern_ioctl() at kern_ioctl+0xc5
ioctl() at ioctl+0xef
syscallenter() at syscallenter+0xef
syscall() at syscall+0x4c
Xfast_syscall() at Xfast_syscall+0xe1
--- syscall (54, FreeBSD ELF64, ioctl), rip = 0x800a7976c, rsp =
0x7fffffffd978, rbp = 0x3 ---
>How-To-Repeat:
camcontrol negotiate on a ciss device.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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