5.2-RC fault inside em driver

Hi!

I am already several times got problems with my server. It crashes in 
different moments of time with message like this:
Fatal Trap 12: page fault while in kernel mode
cpuid=1; apic id = 01
Fault virtual address = 0xe5
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc052080C
stack pointer = 0x10:0xe00b1cb4
frame pointer = 0x10:0xe00b1c88
code segment = base 0x0, limit 0xfffff, type 0x1b
	 = DPL 0 pres 1 def32 1 gran 1
process eflags = resume, IOPL=1
current process = 41 (irq28:em0)
trap number 12
panic: page fault
cpuid=1;
boot called on cpu#1
syncing discs, buffers remaining
panic: pmap_invalidate_range: interupts disabled
cpuid=1;
boot() called on cpu#1

Dmesg:
Dec  7 00:32:52 a0 kernel: Copyright (c) 1992-2003 The FreeBSD Project.
Dec  7 00:32:52 a0 kernel: Copyright (c) 1979, 1980, 1983, 1986, 1988, 
1989, 1991, 1992, 1993, 1994
Dec  7 00:32:52 a0 kernel: The Regents of the University of California. 
All rights reserved.
Dec  7 00:32:52 a0 kernel: FreeBSD 5.2-BETA #0: Fri Dec  5 12:17:11 EET 2003
Dec  7 00:32:52 a0 kernel: root_at_a0.alkar.net:/usr/src/sys/i386/compile/A0_1
Dec  7 00:32:52 a0 kernel: Preloaded elf kernel "/boot/kernel/kernel" at 
0xc07a6000.
Dec  7 00:32:52 a0 kernel: MPTable: <AMI      GCHE        >
Dec  7 00:32:52 a0 kernel: Timecounter "i8254" frequency 1193182 Hz 
quality 0
Dec  7 00:32:52 a0 kernel: CPU: Intel(R) Xeon(TM) CPU 2.40GHz 
(2400.10-MHz 686-class CPU)
Dec  7 00:32:52 a0 kernel: Origin = "GenuineIntel"  Id = 0xf25  Stepping = 5
Dec  7 00:32:52 a0 kernel: 
Features=0xbfebfbff<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>
Dec  7 00:32:52 a0 kernel: Hyperthreading: 2 logical CPUs
Dec  7 00:32:52 a0 kernel: real memory  = 1073676288 (1023 MB)
Dec  7 00:32:52 a0 kernel: avail memory = 1037717504 (989 MB)
Dec  7 00:32:52 a0 kernel: FreeBSD/SMP: Multiprocessor System Detected: 
4 CPUs
Dec  7 00:32:52 a0 kernel: cpu0 (BSP): APIC ID:  0
Dec  7 00:32:52 a0 kernel: cpu1 (AP): APIC ID:  1
Dec  7 00:32:52 a0 kernel: cpu2 (AP): APIC ID:  6
Dec  7 00:32:52 a0 kernel: cpu3 (AP): APIC ID:  7
Dec  7 00:32:52 a0 kernel: ioapic0: Assuming intbase of 0
Dec  7 00:32:52 a0 kernel: ioapic1: Assuming intbase of 16
Dec  7 00:32:52 a0 kernel: ioapic2: Assuming intbase of 32
Dec  7 00:32:52 a0 kernel: ioapic3: Assuming intbase of 48
Dec  7 00:32:52 a0 kernel: ioapic0 <Version 1.1> irqs 0-15 on motherboard
Dec  7 00:32:52 a0 kernel: ioapic1 <Version 1.1> irqs 16-31 on motherboard
Dec  7 00:32:52 a0 kernel: ioapic2 <Version 1.1> irqs 32-47 on motherboard
Dec  7 00:32:52 a0 kernel: ioapic3 <Version 1.1> irqs 48-63 on motherboard
Dec  7 00:32:52 a0 kernel: Pentium Pro MTRR support enabled
Dec  7 00:32:52 a0 kernel: npx0: [FAST]
Dec  7 00:32:52 a0 kernel: npx0: <math processor> on motherboard
Dec  7 00:32:52 a0 kernel: npx0: INT 16 interface
Dec  7 00:32:52 a0 kernel: pcibios: BIOS version 2.10
Dec  7 00:32:52 a0 kernel: Using $PIR table, 11 entries at 0xc00f4a50
Dec  7 00:32:53 a0 kernel: pcib0: <MPTable Host-PCI bridge> at pcibus 0 
on motherboard
Dec  7 00:32:53 a0 kernel: pci0: <PCI bus> on pcib0
Dec  7 00:32:53 a0 kernel: pcib0: slot 4 INTA routed to irq 18
Dec  7 00:32:53 a0 kernel: pcib0: slot 6 INTA routed to irq 22
Dec  7 00:32:53 a0 kernel: pcib0: slot 8 INTA routed to irq 28
Dec  7 00:32:53 a0 kernel: pcib0: slot 9 INTA routed to irq 26
Dec  7 00:32:53 a0 kernel: pcib0: slot 11 INTA routed to irq 29
Dec  7 00:32:53 a0 kernel: ahc0: <Adaptec 2940 Ultra2 SCSI adapter> port 
0xd800-0xd8ff mem 0xfebfe0
00-0xfebfefff irq 18 at device 4.0 on pci0
Dec  7 00:32:53 a0 kernel: aic7890/91: Ultra2 Wide Channel A, SCSI Id=7, 
32/253 SCBs
Dec  7 00:32:53 a0 kernel: mly0: <Mylex AcceleRAID 170> mem 
0xfa000000-0xfbffffff irq 22 at device
6.0 on pci0
Dec  7 00:32:53 a0 kernel: mly0: AcceleRAID 170  , 1 channel, firmware 
7.02-0-00 (20021213), 32MB R
AM
Dec  7 00:32:53 a0 kernel: em0: <Intel(R) PRO/1000 Network Connection, 
Version - 1.7.19> port 0xe00
0-0xe03f mem 0xfeb80000-0xfeb9ffff irq 28 at device 8.0 on pci0
Dec  7 00:32:53 a0 kernel: em0:  Speed:N/A  Duplex:N/A
Dec  7 00:32:53 a0 kernel: em1: <Intel(R) PRO/1000 Network Connection, 
Version - 1.7.19> port 0xe40
0-0xe43f mem 0xfeba0000-0xfebbffff irq 26 at device 9.0 on pci0
Dec  7 00:32:53 a0 kernel: em1:  Speed:N/A  Duplex:N/A
Dec  7 00:32:53 a0 kernel: pci0: <display, VGA> at device 11.0 (no 
driver attached)
Dec  7 00:32:53 a0 kernel: atapci0: <ServerWorks CSB6 UDMA100 
controller> port 0xffa0-0xffaf,0x374-
0x377,0x170-0x177,0x3f4-0x3f7,0x1f0-0x1f7 at device 15.1 on pci0
Dec  7 00:32:53 a0 kernel: ata0: at 0x1f0 irq 14 on atapci0
Dec  7 00:32:53 a0 kernel: ata0: [MPSAFE]
Dec  7 00:32:53 a0 kernel: ata1: at 0x170 irq 15 on atapci0
Dec  7 00:32:53 a0 kernel: ata1: [MPSAFE]
Dec  7 00:32:53 a0 kernel: isab0: <PCI-ISA bridge> at device 15.3 on pci0
Dec  7 00:32:53 a0 kernel: isa0: <ISA bus> on isab0
Dec  7 00:32:53 a0 kernel: pcib255: <ServerWorks host to PCI 
bridge(unknown chipset)> at pcibus 255
  on motherboard
Dec  7 00:32:53 a0 kernel: pci255: <PCI bus> on pcib255
Dec  7 00:32:53 a0 kernel: orm0: <Option ROMs> at iomem 
0xc8000-0xcd7ff,0xc0000-0xc7fff on isa0
Dec  7 00:32:53 a0 kernel: pmtimer0 on isa0
Dec  7 00:32:53 a0 kernel: atkbdc0: <Keyboard controller (i8042)> at 
port 0x64,0x60 on isa0
Dec  7 00:32:53 a0 kernel: atkbd0: <AT Keyboard> irq 1 on atkbdc0
Dec  7 00:32:53 a0 kernel: kbd0 at atkbd0
Dec  7 00:32:53 a0 kernel: fdc0: <Enhanced floppy controller (i82077, 
NE72065 or clone)> at port 0x
3f7,0x3f0-0x3f5 irq 6 drq 2 on isa0
Dec  7 00:32:53 a0 kernel: fdc0: FIFO enabled, 8 bytes threshold
Dec  7 00:32:53 a0 kernel: fd0: <1440-KB 3.5" drive> on fdc0 drive 0
Dec  7 00:32:53 a0 kernel: sc0: <System console> at flags 0x100 on isa0
Dec  7 00:32:53 a0 kernel: sc0: VGA <16 virtual consoles, flags=0x300>
Dec  7 00:32:53 a0 kernel: sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
Dec  7 00:32:53 a0 kernel: sio0: type 16550A
Dec  7 00:32:53 a0 kernel: sio1 at port 0x2f8-0x2ff irq 3 on isa0
Dec  7 00:32:53 a0 kernel: sio1: type 16550A
Dec  7 00:32:53 a0 kernel: vga0: <Generic ISA VGA> at port 0x3c0-0x3df 
iomem 0xa0000-0xbffff on isa
0
Dec  7 00:32:53 a0 kernel: unknown: <PNP0303> can't assign resources (port)
Dec  7 00:32:53 a0 kernel: unknown: <PNP0501> can't assign resources (port)
Dec  7 00:32:53 a0 kernel: unknown: <PNP0501> can't assign resources (port)
Dec  7 00:32:53 a0 kernel: unknown: <PNP0700> can't assign resources (port)
Dec  7 00:32:53 a0 kernel: Timecounters tick every 10.000 msec
Dec  7 00:32:53 a0 kernel: ipfw2 initialized, divert disabled, 
rule-based forwarding enabled, defau
lt to deny, logging unlimited
Dec  7 00:32:53 a0 kernel: Waiting 5 seconds for SCSI devices to settle
Dec  7 00:32:53 a0 kernel: GEOM: create disk da0 dp=0xc6763450
Dec  7 00:32:53 a0 kernel: GEOM: create disk da1 dp=0xc6764050
Dec  7 00:32:53 a0 kernel: da1 at mly0 bus 1 target 0 lun 0
Dec  7 00:32:53 a0 kernel: da1: <RAID 5 online > Fixed Direct Access 
SCSI-3 device
Dec  7 00:32:53 a0 kernel: da1: 135.168MB/s transfers
Dec  7 00:32:53 a0 kernel: da1: 69972MB (143302656 512 byte sectors: 
255H 63S/T 8920C)
Dec  7 00:32:53 a0 kernel: SMP: AP CPU #1 Launched!
Dec  7 00:32:53 a0 kernel: SMP: AP CPU #3 Launched!
Dec  7 00:32:53 a0 kernel: SMP: AP CPU #2 Launched!
Dec  7 00:32:53 a0 kernel: da0 at ahc0 bus 0 target 0 lun 0
Dec  7 00:32:53 a0 kernel: da0: <IBM DNES-309170W SAH0> Fixed Direct 
Access SCSI-3 device
Dec  7 00:32:53 a0 kernel: da0: 40.000MB/s transfers (20.000MHz, offset 
31, 16bit), Tagged Queueing
  Enabled
Dec  7 00:32:53 a0 kernel: da0: 8748MB (17916240 512 byte sectors: 255H 
63S/T 1115C)
Dec  7 00:32:53 a0 kernel: Mounting root from ufs:/dev/da0s1a


-- 
Alexander Motin