panics and crash dumps

Michael Grant mgrant at grant.org
Mon Jul 21 09:25:57 UTC 2008


I'm having problems getting a crash dump on my panics.

A bog standard crash dump on panic to swap hangs during the dump.  Kris
recommended trying minidump or DDB.  With minidump enabled, it hangs,
doesn't even try to dump on panic.

So on to try DDB, have these lines in my kernel:

  makeoptions     DEBUG=-g
  options         KDB
  options         DDB

and now this kernel, when it boots, it doesn't see all of the sata drives.
I have 2 sata controllers, one on the motherboard, the other a pci card (a
supermicro controller).  The only difference in the kernel conf files are
the latter 2 options lines above being added.  I did not see any errors
while compiling this kernel.  The same kernel modules are in kernel.old as
in kernel, however, these are the ones that differ:

[#1022] diff -r kernel kernel.ddb.broken
Files kernel/bktr.ko and kernel.ddb.broken/bktr.ko differ
Files kernel/geom_eli.ko and kernel.ddb.broken/geom_eli.ko differ
Files kernel/hptrr.ko and kernel.ddb.broken/hptrr.ko differ
Files kernel/ibcs2.ko and kernel.ddb.broken/ibcs2.ko differ
Files kernel/if_ed.ko and kernel.ddb.broken/if_ed.ko differ
Files kernel/if_oltr.ko and kernel.ddb.broken/if_oltr.ko differ
Files kernel/kernel and kernel.ddb.broken/kernel differ
Files kernel/linker.hints and kernel.ddb.broken/linker.hints differ
Files kernel/logo_saver.ko and kernel.ddb.broken/logo_saver.ko differ
Files kernel/mem.ko and kernel.ddb.broken/mem.ko differ
Files kernel/rr232x.ko and kernel.ddb.broken/rr232x.ko differ
Files kernel/udf.ko and kernel.ddb.broken/udf.ko differ

When my DDB kernel boots, not only does it not see the sata drives, upon a
quick reboot, it panics and does not throw me into the debugger.  And then,
to my surprise, it does a crash dump into swap. But when the machine
reboots, it can't read it!  I get:

Checking for core dump on /dev/ad1s1b...
savecore: error reading last dump header at offset 10005032448 in
/dev/ad1s1b: Input/output error
savecore: no dumps found
Jul 21 04:45:17 charm savecore: error reading last dump header at offset
10005032448 in /dev/ad1s1b: Input/output error

Here is the screen output of the crash of the kernel with DDB which did not
recognize the second sata controller:

charm# reboot
Jul 21 04:32:16 charm reboot: rebooted by root
Jul 21 04:32:16 charm syslogd: exiting on signal 15
Waiting (max 60 seconds) for system process `vnlru' to stop...done
Waiting (max 60 seconds) for system process `bufdaemon' to stop...done
Waiting (max 60 seconds) for system process `syncer' to stop...
Syncing disks, vnodes remaining...7 0 0 done
All buffers synced.
Uptime: 3m46s


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96fc48
frame pointer           = 0x28:0xff96fc48
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 3m46s
Dumping 3327 MB (2 chunks)
  chunk 0: 1MB (151 pages) ... ok
  chunk 1: 3327MB (851568 pages) 3311 3295 3279 3263 3247 3231 3215 3199
3183 3167 3151 3135 3119 3103 3087 3071 3055 3039 3023 3007 2991 2975 2959
2943 2927 2911 2895 2879 2863 2847 2831 2815 2799 2783 2767 2751 2735 2719
2703 2687 2671 2655 2639 2623 2607 2591 2575 2559 2543 2527 2511 2495 2479
2463 2447 2431 2415 2399 2383 2367 2351 2335 2319 2303 2287 2271 2255 2239
2223 2207 2191 2175 2159 2143 2127 2111 2095 2079 2063 2047 2031 2015 1999
1983 1967 1951 1935 1919 1903 1887 1871 1855 1839 1823 1807 1791 1775 1759
1743 1727 1711 1695 1679 1663 1647 1631 1615 1599 1583 1567 1551 1535 1519
1503 1487 1471 1455 1439 1423 1407 1391 1375 1359 1343 1327 1311 1295 1279
1263 1247 1231 1215 1199 1183 1167 1151 1135 1119 1103 1087 1071 1055 1039
1023 1007 991 975 959 943 927 911 895 879 863 847 831 815 799 783 767 751
735 719 703 687 671 655 639 623 607 591 575 559 543 527 511 495 479 463 447
431 415 399 383 367 351 335 319 303 287 271 255 239 223 207 191 175 159 143
127 111 95 79 63 47 31 15 ... ok

Dump complete


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96fad8
frame pointer           = 0x28:0xff96fad8
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m40s


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96f968
frame pointer           = 0x28:0xff96f968
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m40s


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96f7f8
frame pointer           = 0x28:0xff96f7f8
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m41s


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96f688
frame pointer           = 0x28:0xff96f688
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m41s


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96f518
frame pointer           = 0x28:0xff96f518
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m42s


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96f3a8
frame pointer           = 0x28:0xff96f3a8
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m42s


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96f238
frame pointer           = 0x28:0xff96f238
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m43s


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96f0c8
frame pointer           = 0x28:0xff96f0c8
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m44s


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96ef58
frame pointer           = 0x28:0xff96ef58
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m44s


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96ede8
frame pointer           = 0x28:0xff96ede8
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m45s


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96ec78
frame pointer           = 0x28:0xff96ec78
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m45s


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96eb08
frame pointer           = 0x28:0xff96eb08
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m46s


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96e998
frame pointer           = 0x28:0xff96e998
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m46s


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96e828
frame pointer           = 0x28:0xff96e828
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m47s


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96e6b8
frame pointer           = 0x28:0xff96e6b8
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m47s


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xff96e548
frame pointer           = 0x28:0xff96e548
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         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m48s

Fatal double fault:
eip = 0xc09157f0
esp = 0xff96e000
ebp = 0xff96e004
panic: double fault
Uptime: 5m48s
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xc0aa43c0
frame pointer           = 0x28:0xc0aa43c0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = nested task, resume, IOPL = 0
current process         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m48s
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xc0aa4278
frame pointer           = 0x28:0xc0aa4278
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m48s
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xc0aa4130
frame pointer           = 0x28:0xc0aa4130
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m48s
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xc0aa3fe8
frame pointer           = 0x28:0xc0aa3fe8
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m48s
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xc0aa3ea0
frame pointer           = 0x28:0xc0aa3ea0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m48s
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xc0aa3d58
frame pointer           = 0x28:0xc0aa3d58
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m48s
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xc0aa3c10
frame pointer           = 0x28:0xc0aa3c10
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m48s
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xc0aa3ac8
frame pointer           = 0x28:0xc0aa3ac8
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m48s
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xc0aa3980
frame pointer           = 0x28:0xc0aa3980
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m48s
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xc0aa3838
frame pointer           = 0x28:0xc0aa3838
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m48s
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xc0aa36f0
frame pointer           = 0x28:0xc0aa36f0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m48s
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xc0aa35a8
frame pointer           = 0x28:0xc0aa35a8
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m48s
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xc0aa3460
frame pointer           = 0x28:0xc0aa3460
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m48s
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xc0aa3318
frame pointer           = 0x28:0xc0aa3318
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m48s
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xc0aa31d0
frame pointer           = 0x28:0xc0aa31d0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 2151 (reboot)
trap number             = 12
panic: page fault
Uptime: 5m48s
kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x0
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc08da707
stack pointer           = 0x28:0xc0aa3088
frame pointer           = 0x28:0xc0aa3088
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 2151 (reboot)


Here is the kernel configuration file:

machine         i386
#cpu            I486_CPU
#cpu            I586_CPU
cpu             I686_CPU
ident           GENERIC

# To statically compile in device wiring instead of /boot/device.hints
#hints          "GENERIC.hints"         # Default places to look for
devices.

makeoptions     DEBUG=-g                # Build kernel with gdb(1) debug
symbols

options         KDB
options         DDB

options         SMP                     # Symmetric MultiProcessor Kernel
options         SCHED_4BSD              # 4BSD scheduler
options         PREEMPTION              # Enable kernel thread preemption
options         INET                    # InterNETworking
options         INET6                   # IPv6 communications protocols
options         FFS                     # Berkeley Fast Filesystem
options         SOFTUPDATES             # Enable FFS soft updates support
options         UFS_ACL                 # Support for access control lists
options         UFS_DIRHASH             # Improve performance on big
directories
options         MD_ROOT                 # MD is a potential root device
options         NFSCLIENT               # Network Filesystem Client
options         NFSSERVER               # Network Filesystem Server
options         NFS_ROOT                # NFS usable as /, requires
NFSCLIENT
options         MSDOSFS                 # MSDOS Filesystem
options         CD9660                  # ISO 9660 Filesystem
options         PROCFS                  # Process filesystem (requires
PSEUDOFS)
options         PSEUDOFS                # Pseudo-filesystem framework
options         GEOM_GPT                # GUID Partition Tables.
options         COMPAT_43               # Compatible with BSD 4.3 [KEEP
THIS!]
options         COMPAT_FREEBSD4         # Compatible with FreeBSD4
options         COMPAT_FREEBSD5         # Compatible with FreeBSD5
options         SCSI_DELAY=5000         # Delay (in ms) before probing SCSI
options         KTRACE                  # ktrace(1) support
options         SYSVSHM                 # SYSV-style shared memory
options         SYSVMSG                 # SYSV-style message queues
options         SYSVSEM                 # SYSV-style semaphores
options         _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time
extensions
options         KBD_INSTALL_CDEV        # install a CDEV entry in /dev
options         AHC_REG_PRETTY_PRINT    # Print register bitfields in debug
                                        # output.  Adds ~128k to driver.
options         AHD_REG_PRETTY_PRINT    # Print register bitfields in debug
                                        # output.  Adds ~215k to driver.
options         ADAPTIVE_GIANT          # Giant mutex is adaptive.
options         IPFILTER                # IPFilter support
options         IPFILTER_LOG            # IPFilter logging support
options         IPFILTER_DEFAULT_BLOCK  # Block all packets by default
options         IPFIREWALL
options         IPFIREWALL_VERBOSE
options         IPFIREWALL_DEFAULT_TO_ACCEPT
options         DUMMYNET

device          apic                    # I/O APIC

# Bus support.
device          eisa
device          pci

# System Management Bus support (for healthd and Intel6300ESB)
device          smbus
device          smb
device          ichsmb
device          iicbus
device          iicbb
device          intpm

# Floppy drives
device          fdc

# ATA and ATAPI devices
device          ata
device          atadisk         # ATA disk drives
device          ataraid         # ATA RAID drives
device          atapicd         # ATAPI CDROM drives
device          atapifd         # ATAPI floppy drives
#device         atapist         # ATAPI tape drives
options         ATA_STATIC_ID   # Static device numbering

# SCSI Controllers
device          ahb             # EISA AHA1742 family
device          ahc             # AHA2940 and onboard AIC7xxx devices
device          ahd             # AHA39320/29320 and onboard AIC79xx devices
device          amd             # AMD 53C974 (Tekram DC-390(T))
device          isp             # Qlogic family
#device         ispfw           # Firmware for QLogic HBAs- normally a
module
device          mpt             # LSI-Logic MPT-Fusion
#device         ncr             # NCR/Symbios Logic
device          sym             # NCR/Symbios Logic (newer chipsets + those
of `ncr')
device          trm             # Tekram DC395U/UW/F DC315U adapters

device          adv             # Advansys SCSI adapters
device          adw             # Advansys wide SCSI adapters
device          aha             # Adaptec 154x SCSI adapters
device          aic             # Adaptec 15[012]x SCSI adapters,
AIC-6[23]60.
device          bt              # Buslogic/Mylex MultiMaster SCSI adapters

device          ncv             # NCR 53C500
device          nsp             # Workbit Ninja SCSI-3
device          stg             # TMC 18C30/18C50

# SCSI peripherals
device          scbus           # SCSI bus (required for SCSI)
device          ch              # SCSI media changers
device          da              # Direct Access (disks)
device          sa              # Sequential Access (tape etc)
device          cd              # CD
device          pass            # Passthrough device (direct SCSI access)
device          ses             # SCSI Environmental Services (and SAF-TE)

# RAID controllers interfaced to the SCSI subsystem
device          amr             # AMI MegaRAID
device          arcmsr          # Areca SATA II RAID
device          asr             # DPT SmartRAID V, VI and Adaptec SCSI RAID
device          ciss            # Compaq Smart RAID 5*
device          dpt             # DPT Smartcache III, IV - See NOTES for
options
device          hptmv           # Highpoint RocketRAID 182x / Marvell
device          iir             # Intel Integrated RAID
device          ips             # IBM (Adaptec) ServeRAID
device          mly             # Mylex AcceleRAID/eXtremeRAID
device          twa             # 3ware 9000 series PATA/SATA RAID

# RAID controllers
device          aac             # Adaptec FSA RAID
device          aacp            # SCSI passthrough for aac (requires CAM)
device          ida             # Compaq Smart RAID
device          mlx             # Mylex DAC960 family
device          pst             # Promise Supertrak SX6000
device          twe             # 3ware ATA RAID

# atkbdc0 controls both the keyboard and the PS/2 mouse
device          atkbdc          # AT keyboard controller
device          atkbd           # AT keyboard
device          psm             # PS/2 mouse

device          vga             # VGA video card driver

device          splash          # Splash screen and screen saver support

# syscons is the default console driver, resembling an SCO console
device          sc

# Enable this for the pcvt (VT220 compatible) console driver
#device         vt
#options        XSERVER         # support for X server on a vt console
#options        FAT_CURSOR      # start with block cursor

device          agp             # support several AGP chipsets

# Power management support (see NOTES for more options)
#device         apm
# Add suspend/resume support for the i8254.
device          pmtimer

# PCCARD (PCMCIA) support
# PCMCIA and cardbus bridge support
device          cbb             # cardbus (yenta) bridge
device          pccard          # PC Card (16-bit) bus
device          cardbus         # CardBus (32-bit) bus

# Serial (COM) ports
device          sio             # 8250, 16[45]50 based serial ports

# Parallel port
device          ppc
device          ppbus           # Parallel port bus (required)
device          lpt             # Printer
device          plip            # TCP/IP over parallel
device          ppi             # Parallel port interface device
#device         vpo             # Requires scbus and da

# If you've got a "dumb" serial or parallel PCI card that is
# supported by the puc(4) glue driver, uncomment the following
# line to enable it (connects to the sio and/or ppc drivers):
#device         puc

# PCI Ethernet NICs.
device          de              # DEC/Intel DC21x4x (``Tulip'')
device          em              # Intel PRO/1000 adapter Gigabit Ethernet
Card
device          ixgb            # Intel PRO/10GbE Ethernet Card
device          txp             # 3Com 3cR990 (``Typhoon'')
device          vx              # 3Com 3c590, 3c595 (``Vortex'')

# PCI Ethernet NICs that use the common MII bus controller code.
# NOTE: Be sure to keep the 'device miibus' line in order to use these NICs!
device          miibus          # MII bus support
device          bfe             # Broadcom BCM440x 10/100 Ethernet
device          bge             # Broadcom BCM570xx Gigabit Ethernet
device          dc              # DEC/Intel 21143 and various workalikes
device          fxp             # Intel EtherExpress PRO/100B (82557, 82558)
device          lge             # Level 1 LXT1001 gigabit Ethernet
device          nge             # NatSemi DP83820 gigabit Ethernet
device          nve             # nVidia nForce MCP on-board Ethernet
Networking
device          pcn             # AMD Am79C97x PCI 10/100(precedence over
'lnc')
device          re              # RealTek 8139C+/8169/8169S/8110S
device          rl              # RealTek 8129/8139
device          sf              # Adaptec AIC-6915 (``Starfire'')
device          sis             # Silicon Integrated Systems SiS 900/SiS
7016
device          sk              # SysKonnect SK-984x & SK-982x gigabit
Ethernet
device          ste             # Sundance ST201 (D-Link DFE-550TX)
device          ti              # Alteon Networks Tigon I/II gigabit
Ethernet
device          tl              # Texas Instruments ThunderLAN
device          tx              # SMC EtherPower II (83c170 ``EPIC'')
device          vge             # VIA VT612x gigabit Ethernet
device          vr              # VIA Rhine, Rhine II
device          wb              # Winbond W89C840F
device          xl              # 3Com 3c90x (``Boomerang'', ``Cyclone'')

# ISA Ethernet NICs.  pccard NICs included.
device          cs              # Crystal Semiconductor CS89x0 NIC
# 'device ed' requires 'device miibus'
device          ed              # NE[12]000, SMC Ultra, 3c503, DS8390 cards
device          ex              # Intel EtherExpress Pro/10 and Pro/10+
device          ep              # Etherlink III based cards
device          fe              # Fujitsu MB8696x based cards
device          ie              # EtherExpress 8/16, 3C507, StarLAN 10 etc.
device          lnc             # NE2100, NE32-VL Lance Ethernet cards
device          sn              # SMC's 9000 series of Ethernet chips
device          xe              # Xircom pccard Ethernet

# ISA devices that use the old ISA shims
#device         le

# Wireless NIC cards
device          wlan            # 802.11 support
device          an              # Aironet 4500/4800 802.11 wireless NICs.
device          awi             # BayStack 660 and others
device          ral             # Ralink Technology RT2500 wireless NICs.
device          wi              # WaveLAN/Intersil/Symbol 802.11 wireless
NICs.
#device         wl              # Older non 802.11 Wavelan wireless NIC.

# Pseudo devices.
device          loop            # Network loopback
device          random          # Entropy device
device          ether           # Ethernet support
device          sl              # Kernel SLIP
device          ppp             # Kernel PPP
device          tun             # Packet tunnel.
device          pty             # Pseudo-ttys (telnet etc)
device          md              # Memory "disks"
device          gif             # IPv6 and IPv4 tunneling
device          faith           # IPv6-to-IPv4 relaying (translation)

# The `bpf' device enables the Berkeley Packet Filter.
# Be aware of the administrative consequences of enabling this!
# Note that 'bpf' is required for DHCP.
device          bpf             # Berkeley packet filter

# USB support
device          uhci            # UHCI PCI->USB interface
device          ohci            # OHCI PCI->USB interface
device          ehci            # EHCI PCI->USB interface (USB 2.0)
device          usb             # USB Bus (required)
#device         udbp            # USB Double Bulk Pipe devices
device          ugen            # Generic
device          uhid            # "Human Interface Devices"
device          ukbd            # Keyboard
device          ulpt            # Printer
device          umass           # Disks/Mass storage - Requires scbus and da
device          ums             # Mouse
device          ural            # Ralink Technology RT2500USB wireless NICs
device          urio            # Diamond Rio 500 MP3 player
device          uscanner        # Scanners
# USB Ethernet, requires miibus
device          aue             # ADMtek USB Ethernet
device          axe             # ASIX Electronics USB Ethernet
device          cdce            # Generic USB over Ethernet
device          cue             # CATC USB Ethernet
device          kue             # Kawasaki LSI USB Ethernet
device          rue             # RealTek RTL8150 USB Ethernet
#device         vlan            # 802.1Q
#pseudo-device  vlan 1

# FireWire support
device          firewire        # FireWire bus code
device          sbp             # SCSI over FireWire (Requires scbus and da)
device          fwe             # Ethernet over FireWire (non-standard!)


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