port-cobalt/45820: Latest current fails on Qube2 with diagnostic error panic: kernel diagnostic assertion "l == curlwp" failed: file "/src/sys/arch/mips/mips/mips_fpu.c", line 34

[ober%netbsd.org@localhost]

>Number:         45820
>Category:       port-cobalt
>Synopsis:       Latest current fails on Qube2 with diagnostic error panic: 
>kernel diagnostic assertion "l == curlwp" failed: file 
>"/src/sys/arch/mips/mips/mips_fpu.c", line 34
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-cobalt-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Jan 12 04:45:00 +0000 2012
>Originator:     Jaime Fournier
>Release:        5.99.59
>Organization:
NetBSD
>Environment:
NetBSD 5.99.59 (GENERIC) #0: Wed Jan 11 12:28:24 PST 2012
        root@:/src/sys/arch/cobalt/compile/obj/GENERIC
Userland is 5.0.2
>Description:
Booting latest GENERIC from 5.99.59 on a Cobalt Qube 2
I get
NetBSD 5.99.59 (GENERIC) #0: Wed Jan 11 12:28:24 PST 2012
        root@:/src/sys/arch/cobalt/compile/obj/GENERIC
Cobalt Qube 2
total memory = 128 MB
avail memory = 120 MB
mainbus0 (root)
com0 at mainbus0 addr 0x1c800000 level 3: st16650a, working fifo
com0: console
cpu0 at mainbus0: QED RM5200 CPU (0x28a0) Rev. 10.0 with built-in FPU Rev. 10.0
cpu0: 48 TLB entries, 16MB max page size
cpu0: 32KB/32B 2-way set-associative L1 instruction cache
cpu0: 32KB/32B 2-way set-associative write-back L1 data cache
mcclock0 at mainbus0 addr 0x10000070: mc146818 compatible time-of-day clock
panel0 at mainbus0 addr 0x1f000000
gt0 at mainbus0 addr 0x14000000
pci0 at gt0
pchb0 at pci0 dev 0 function 0: Galileo GT-64111 System Controller, rev 1
tlp0 at pci0 dev 7 function 0: DECchip 21143 Ethernet, pass 4.1
tlp0: interrupting at level 1
tlp0: Ethernet address 00:10:e0:00:4b:a6
lxtphy0 at tlp0 phy 1: LXT970 10/100 media interface, rev. 3
lxtphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
pcib0 at pci0 dev 9 function 0
pcib0: VIA Technologies VT82C586 PCI-ISA Bridge, rev 39
viaide0 at pci0 dev 9 function 1
viaide0: VIA Technologies VT82C586 (Apollo VP) ATA33 controller
viaide0: primary channel interrupting at irq 14
atabus0 at viaide0 channel 0
viaide0: secondary channel interrupting at irq 15
atabus1 at viaide0 channel 1
VIA Technologies VT83C572 USB Controller (USB serial bus, revision 0x02) at 
pci0 dev 9 function 2 not configured
tlp1 at pci0 dev 12 function 0: DECchip 21143 Ethernet, pass 4.1
tlp1: interrupting at level 2
tlp1: Ethernet address 00:10:e0:00:4a:1a
lxtphy1 at tlp1 phy 1: LXT970 10/100 media interface, rev. 3
lxtphy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
wd0 at atabus0 drive 0
wd0: <QUANTUM FIREBALL EX6.4A>
wd0: 6149 MB, 13328 cyl, 15 head, 63 sec, 512 bytes/sect x 12594960 sectors
boot device: wd0
root on wd0a dumps on wd0b
root file system type: ffs
pid 1(init): ABI set to O32 (e_flags=0x1007)
panic: kernel diagnostic assertion "l == curlwp" failed: file 
"/src/sys/arch/mips/mips/mips_fpu.c", line 349 
kernel: breakpoint trap
Stopped in pid 4.1 (date) at    netbsd:cpu_Debugger+0x4:        jr      ra
                bdslot: nop
db>db> bt
0xcafabcc8: cpu_Debugger+4 (63061,500,4,8043b9c0) ra 8029730c sz 0
0xcafabcc8: vpanic+214 (63061,500,4,8043b9c0) ra 803a1e8c sz 56
0xcafabd00: kern_assert+3c (63061,803ec8ec,803f1b7c,8040afcc) ra 801a1ec8 sz 32
0xcafabd20: mips_fpu_state_release+68 (63061,803ec8ec,803f1b7c,8040afcc) ra 8028
fad0 sz 32
0xcafabd40: pcu_cpu_op+b4 (63061,803ec8ec,803f1b7c,8040afcc) ra 8028ff54 sz 56
0xcafabd78: pcu_load+f0 (63061,803ec8ec,803f1b7c,8040afcc) ra 802dce20 sz 64
0xcafabdb8: trap+a00 (1,803ec8ec,803f1b7c,7de69ee0) ra 8019f758 sz 400
0xcafabf48: mips3_user_gen_exception+d8 (1,803ec8ec,803f1b7c,7de69ee0) ra 0 sz 0

User-level: pid 4.1
db> show registers
at          1   _KERNEL_OPT_AIO
v0          1   _KERNEL_OPT_AIO
v1          1   _KERNEL_OPT_AIO
a0          63061       _KERNEL_OPT_AIO+0x63060
a1          500 _KERNEL_OPT_AIO+0x4ff
a2          4   _KERNEL_OPT_AIO+0x3
a3          8043b9c0    cpu_info_store
t0          1   _KERNEL_OPT_AIO
t1          1   _KERNEL_OPT_AIO
t2          8043b9c0    cpu_info_store
t3          0
t4          1   _KERNEL_OPT_AIO
t5          3   _KERNEL_OPT_AIO+0x2
t6          ffffffff
t7          fffffffe
s0          104 _KERNEL_OPT_AIO+0x103
s1          803ec8b8    copyright+0x584
s2          80440000    saemul_netbsd+0x10
s3          80454294    scratchstr.10337
s4          80460000    nfs_reqcache_pool+0x10
s5          cafabd24
s6          ff13        _KERNEL_OPT_AIO+0xff12
k1          8029707c    printf+0x44
gp          8044f6d0    ip6_opts+0xc
sp          cafabcc8
fp          cafabcc8
ra          8029730c    vpanic+0x214
sr          fa03        _KERNEL_OPT_AIO+0xfa02
mdlo        3   _KERNEL_OPT_AIO+0x2
mdhi        4   _KERNEL_OPT_AIO+0x3
bad         87e68840
cs          24  _KERNEL_OPT_AIO+0x23
pc          80051e48    cpu_Debugger+0x4
netbsd:cpu_Debugger+0x4:        jr      ra
                bdslot: nop
db> 


>How-To-Repeat:
boot GENERIC from head on a 5.0.2 system
>Fix: