syncache_timer_handler page fault

[Peter Avalos <pavalos@xxxxxxxxxxxx>]

Is this the same problem that 1696176312f2452d97af549618c7f240f4972136
was trying to fix?

  Version String: DragonFly v2.5.1.756.g4c122-DEVELOPMENT #27: Wed Feb 10 20:06:02 HST 2010
    root@ylem.theshell.com:/usr/obj/usr/src/sys/YLEM

Fatal trap 12: page fault while in kernel mode
mp_lock = 00000001; cpuid = 1; lapic.id = 06000000
fault virtual address   = 0xe0496a6c
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc027cd02
stack pointer           = 0x10:0xdb41ed28
frame pointer           = 0x10:0xdb41ed4c
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = Idle
current thread          = pri 44 (CRIT)
 <- SMP: XXX
trap number             = 12
panic: page fault
mp_lock = 00000001; cpuid = 1
Trace beginning at frame 0xdb41ec28
panic(db41ec4c,10,db41ece0,c,db41ec6c) at panic+0x14d
panic(c036accc,c037baa7,0,0,fffff) at panic+0x14d
trap_fatal(e0496a6c,0,db41ece0,c049dee0,c04929ac) at trap_fatal+0x31d
trap_pfault(2c,78,0,0,0) at trap_pfault+0x131
trap(db41ece0) at trap+0x7a0
calltrap() at calltrap+0xd
--- trap 0, eip = 0, esp = 0xdb41ed24, ebp = 0xdb8b6200 ---
(null)(e0496a48,0,0,1a1b3804,0) at 0
boot() called on cpu#1
Uptime: 82d5h35m39s
Physical memory: 2043 MB
Dumping 508 MB: 493 477 461 445 429 413 397 381 365 349 333 317 301 285 269 253 237 221 205 189 173 157 141 125 109 93 77 61 45 29 13

_get_mycpu (di=0xc0451de0) at ./machine/thread.h:83
83          __asm ("movl %%fs:globaldata,%0" : "=r" (gd) : "m"(__mycpu__dummy));
(kgdb) bt
#0  _get_mycpu (di=0xc0451de0) at ./machine/thread.h:83
#1  md_dumpsys (di=0xc0451de0) at /usr/src/sys/platform/pc32/i386/dump_machdep.c:264
#2  0xc01c5fd2 in dumpsys () at /usr/src/sys/kern/kern_shutdown.c:838
#3  0xc01c65a4 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:387
#4  0xc01c6b02 in panic (fmt=0xc036accc "%s") at /usr/src/sys/kern/kern_shutdown.c:744
#5  0xc0341299 in trap_fatal (frame=0xdb41ece0, eva=<value optimized out>) at /usr/src/sys/platform/pc32/i386/trap.c:1134
#6  0xc03413dc in trap_pfault (frame=0xdb41ece0, usermode=0, eva=3762907756) at /usr/src/sys/platform/pc32/i386/trap.c:1035
#7  0xc0342156 in trap (frame=0xdb41ece0) at /usr/src/sys/platform/pc32/i386/trap.c:707
#8  0xc032d917 in calltrap () at /usr/src/sys/platform/pc32/i386/exception.s:785
#9  0xc027cd02 in syncache_timer_handler (netmsg=0xc0496930) at /usr/src/sys/netinet/tcp_syncache.c:510
#10 0xc025daeb in netmsg_service (msg=0xc0496930, mpsafe_mode=1, mplocked=0) at /usr/src/sys/net/netisr.c:310
#11 0xc0279701 in tcpmsg_service_loop (dummy=0x0) at /usr/src/sys/netinet/tcp_subr.c:410
#12 0xc01d0909 in lwkt_deschedule_self (td=Cannot access memory at address 0x8
) at /usr/src/sys/kern/lwkt_thread.c:246
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

kernel and vmcore is being uploaded to leaf:~pavalos/crash/*.29

--Peter

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