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Date:      Fri, 13 Aug 2010 01:45:18 +0400
From:      Alexey Tarasov <me@lexasoft.ru>
To:        freebsd-current@freebsd.org
Cc:        Alexey Tarasov <me@lexasoft.ru>
Subject:   STABLE kernel panic: privileged instruction fault
Message-ID:  <434A73A4-E2F4-4FC6-A7E4-8A4D514AF6D5@lexasoft.ru>

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Hello.

I have a couple of Supermicro servers which got the similar kernel panic =
with all FreeBSD versions I tried since 6.4.
Now I want to investigate into the problem.
The servers get into panic with similar workload: file server with a lot =
of files and connections. Web server software is nginx. File system is =
UFS+GJOURNAL. Outgoing traffic on each server is ~10 MB/s.
I think it is not software problem, because when I've installed Linux =
with such configuration there were no kernel panics.

Here is the short overview of the hardware:

CPU: Intel(R) Pentium(R) 4 CPU 3.00GHz (2992.51-MHz K8-class CPU)
  Origin =3D "GenuineIntel"  Id =3D 0xf65  Family =3D f  Model =3D 6  =
Stepping =3D 5
  =
Features=3D0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE=
,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  =
Features2=3D0xe59d<SSE3,DTES64,MON,DS_CPL,EST,TM2,CNXT-ID,CX16,xTPR,PDCM>
  AMD Features=3D0x20100800<SYSCALL,NX,LM>
  AMD Features2=3D0x1<LAHF>
  TSC: P-state invariant
real memory  =3D 2147483648 (2048 MB)
avail memory =3D 2054619136 (1959 MB)

DMESG: http://lexasoft.ru/m/dmesg.txt

CORE: http://lexasoft.ru/m/core.txt

Fatal trap 1: privileged instruction fault while in kernel mode
cpuid =3D 1; apic id =3D 01
instruction pointer     =3D 0x20:0xffffff8040d2cc83
stack pointer           =3D 0x28:0xffffff8040d2ca80
frame pointer           =3D 0x28:0xffffff0060c0b740
code segment            =3D base 0x0, limit 0xfffff, type 0x1b
                        =3D DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        =3D interrupt enabled, resume, IOPL =3D 0
current process         =3D 9388 (nginx)
trap number             =3D 1
panic: privileged instruction fault
cpuid =3D 1
Uptime: 17d15h48m49s
Physical memory: 2032 MB
Dumping 1485 MB: 1470 1454 1438 1422 1406 1390 1374 1358 1342 1326 1310 =
1294 1278 1262 1246 1230 1214 1198 1182 1166 1150 1134 1118 1102 1086 =
1070 1054 1038 1022 1006 990 974 958 942 926 910 894 878 862 846 830 814 =
798 782 766 750 734 718 702 686 670 654 638 622 606 590 574 558 542 526 =
510 494 478 462 446 430 414 398 382 366 350 334 318 302 286 270 254 238 =
222 206 190 174 158 142 126 110 94 78 62 46 30 14


(kgdb) #0  doadump () at pcpu.h:223
#1  0xffffffff80590c59 in boot (howto=3D260)
    at /usr/src/sys/kern/kern_shutdown.c:416
#2  0xffffffff8059108c in panic (fmt=3D0xffffffff80951fc4 "%s")
    at /usr/src/sys/kern/kern_shutdown.c:579
#3  0xffffffff80878fd8 in trap_fatal (frame=3D0xffffff0060c0b740, =
eva=3DVariable "eva" is not available.
)
    at /usr/src/sys/amd64/amd64/trap.c:857
#4  0xffffffff808799ea in trap (frame=3D0xffffff8040d2c9d0)
    at /usr/src/sys/amd64/amd64/trap.c:644
#5  0xffffffff8085f983 in calltrap ()
    at /usr/src/sys/amd64/amd64/exception.S:224
#6  0xffffff8040d2cc83 in ?? ()
#7  0xffffff8040d2cb50 in ?? ()
#8  0xffffff8040d2caf0 in ?? ()
#9  0xffffff8040d2cbf0 in ?? ()
#10 0xffffff0060c0b740 in ?? ()
#11 0xffffffff80b83c60 in sysent ()
#12 0xffffff8040d2cc80 in ?? ()
#13 0xffffff8040d2cae0 in ?? ()
#14 0xffffffff8059c431 in bintime (bt=3D0xffffffff80ad3140)
    at /usr/src/sys/kern/kern_tc.c:200
Previous frame inner to this frame (corrupt stack?)
(kgdb)=20



--
Alexey Tarasov

(\__/)=20
(=3D'.'=3D)=20
E[: | | | | :]=D0=97=20
(")_(")




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