I've been unable to boot any kernel I've built since about March 11
and I've narrowed it down to the GEOM_MBR option.

With GEOM_MBR I get a kernel page fault error when trying to
mount the root filesystem at boot time.

ad0: 76319MB <WDC WD800JB-00CRA1> [155061/16/63] at ata0-master UDMA100
ad1: 76319MB <ST380021A> [155061/16/63] at ata0-slave UDMA100
acd0: CDROM <LTN301> at ata1-master PIO4
MBREXT Slice 5 on ad0s2:
[0] f:00 typ:7 s(CHS):6/1/66 e(CHS):250/254/255 s:64 l:12161141
[1] f:00 typ:5 s(CHS):251/0/193 e(CHS):255/254/255 s:12161205 l:20980890
MBREXT Slice 6 on ad0s2:
[0] f:00 typ:11 s(CHS):251/1/193 e(CHS):255/254/255 s:63 l:20980827
[1] f:00 typ:5 s(CHS):255/0/193 e(CHS):255/254/255 s:33142095 l:16787925
MBREXT Slice 7 on ad0s2:
[0] f:00 typ:131 s(CHS):255/1/193 e(CHS):255/254/255 s:63 l:16787862
[1] f:00 typ:5 s(CHS):255/0/193 e(CHS):255/254/255 s:49930020 l:2088450
MBREXT Slice 8 on ad0s2:
[0] f:00 typ:130 s(CHS):255/1/193 e(CHS):255/254/255 s:63 l:2088387
[1] f:00 typ:0 s(CHS):0/0/0 e(CHS):0/0/0 s:0 l:0
MBREXT Slice 5 on ad1s1:
[0] f:00 typ:11 s(CHS):255/1/193 e(CHS):255/254/255 s:63 l:20980827
[1] f:00 typ:0 s(CHS):0/0/0 e(CHS):0/0/0 s:0 l:0


Information from DOS bootblock is: The data for partition 1 is: sysid 11 (0x0b),(DOS or Windows 95 with 32 bit FAT) start 63, size 4208967 (2055 Meg), flag 80 (active) beg: cyl 0/ head 1/ sector 1; end: cyl 261/ head 254/ sector 63 The data for partition 2 is: sysid 15 (0x0f),(Extended DOS (LBA)) start 4209030, size 52018470 (25399 Meg), flag 0 beg: cyl 262/ head 0/ sector 1; end: cyl 1023/ head 254/ sector 63 The data for partition 3 is: sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD) start 139926150, size 16370235 (7993 Meg), flag 0 beg: cyl 1023/ head 0/ sector 1; end: cyl 1023/ head 254/ sector 63 The data for partition 4 is: <UNUSED>

# /dev/ad0s3c:
type: ESDI
sectors/cylinder: 16065
cylinders: 9729
sectors/unit: 156301488

8 partitions:
#        size   offset    fstype   [fsize bsize bps/cpg]
  a: 15321596  1048576    4.2BSD        0     0     0   # (Cyl.   65*- 1018*)
  b:  1048576        0      swap                        # (Cyl.    0 - 65*)
  c: 16370235        0    unused        0     0         # (Cyl.    0 - 1018)
Warning, partition c doesn't cover the whole unit!

Note that I put the swap partition first. Could that cause this problem?


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