[Samsung Galaxy Nexus] johno168:
had random reboot with r98. havent had one in a long time. Attached dmesg and last_kmsg in a ziped file so i could upload the full kmsg.

I took a look at it and i think the errors started at:

[ 8249.451141] L3 CUSTOM SRESP error with SOURCE:L4CFG info=0x84
[ 8249.451293] ------------[ cut here ]------------
[ 8249.451385] WARNING: at arch/arm/mach-omap2/omap_l3_noc.c:130 0xc00702ac()
[ 8249.451538] L3 custom sresp error
[ 8249.451629] Modules linked in:
[ 8249.451873] Backtrace: invalid frame pointer 0x00000001
[ 8249.452087] Board Information: Tuna HW revision: 09 (Maguro 8th Sample), cpu OMAP4460 ES1.1
[ 8249.452270] ---[ end trace 9ad777b101bc3d61 ]---
[ 8249.452331] Master 0x0 MPU
[ 8249.452423] L4CFG OPCODE 0x00000002
[ 8249.452606] Unhandled fault: imprecise external abort (0x1406) at 0xecefffbb
[ 8249.452728] Internal error: : 1406 [#1] PREEMPT SMP
[ 8249.452880] Modules linked in:
[ 8249.453063] CPU: 0 Tainted: G W (3.0.8-franco.Kernel-nightly #98)
[ 8249.453216] pc : [<c056eb10>] lr : [<c00c3954>] psr: 60030013
[ 8249.453216] sp : c7827ed8 ip : c7826000 fp : c00c3fa0
[ 8249.453460] r10: c7833205 r9 : c06b1450 r8 : 00000000
[ 8249.453552] r7 : c7826000 r6 : 60030013 r5 : 00000001 r4 : ffffffff
[ 8249.453704] r3 : 00000000 r2 : c06af870 r1 : 60030013 r0 : c06fec80
[ 8249.453796] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 8249.453948] Control: 10c5387d Table: 8254004a DAC: 00000015
[ 8249.454040]
[ 8249.454040] PC: 0xc056ea90:
[ 8249.454284] ea90 08bd8010 e5932004 e2422001 e5832004 e5930000 e2100002 08bd8010 ebfff8af
[ 8249.455139] eab0 e3a00000 e8bd8010 f57ff05f e3a03000 e5803000 f57ff04f e320f004 f1080080
[ 8249.455932] ead0 e1a0200d e3c23d7f e3c3303f e5932004 e2422001 e5832004 e5933000 e3130002
[ 8249.456756] eaf0 012fff1e eafff89d f57ff05f e3a03000 e5803000 f57ff04f e320f004 e121f001
[ 8249.457611] eb10 e1a0200d e3c23d7f e3c3303f e5932004 e2422001 e5832004 e5933000 e3130002
[ 8249.458404] eb30 012fff1e eafff88d f57ff05f e3a03000 e5803000 f57ff04f e320f004 e1a0200d
[ 8249.459259] eb50 e3c23d7f e3c3303f e5932004 e2422001 e5832004 e5933000 e3130002 012fff1e
[ 8249.460052] eb70 eafff87e e92d4010 e1a0200d e3c23d7f e3c3303f e5932004 e2822001 e5832004
[ 8249.460876]
[ 8249.460906] LR: 0xc00c38d4:
[ 8249.461059] 38d4 c06b1288 c06fec80 c06b1450 c05eaaf4 c05eaad4 e92d4070 e1a05000 e59f0064
[ 8249.461914] 38f4 eb12ad8d e1a06000 e1a00005 ebffff7e e2504000 0a000007 e59f304c e5933000
[ 8249.462707] 3914 e7e030d3 e3550000 13a05000 02035001 e3550000 1a000004 e1a01006 e59f0024
[ 8249.463562] 3934 eb12ac6f e1a00004 e8bd8070 e3a00000 ebfffdfc e1a01006 e59f0008 eb12ac68
[ 8249.464324] 3954 e1a00004 e8bd8070 c06fec80 c06b1288 e92d4010 e3a00000 ebffffdd e59f303c
[ 8249.465179] 3974 e5933000 e3500000 13a02000 03a02001 01a04000 13e0400a e3130004 e59f3020
[ 8249.465972] 3994 e5832148 1a000001 e1a00004 e8bd8010 e1a01004 e59f000c eb12a1d6 eafffff9
[ 8249.466827] 39b4 c06b1288 c06fec80 c05eab20 e92d4ff0 e24dd03c e1a06000 e28d0028 ebffc2e0
[ 8249.467681]
[ 8249.467681] SP: 0xc7827e58:
[ 8249.467834] 7e58 c7826000 c068d1c8 c0047e40 00000000 c06fc340 c00c3fa0 c7826000 c00493d0
[ 8249.468597] 7e78 ffffffff ffffffff c7827ec4 60030013 c7826000 c004efac c06fec80 60030013
[ 8249.469451] 7e98 c06af870 00000000 ffffffff 00000001 60030013 c7826000 00000000 c06b1450
[ 8249.470245] 7eb8 c7833205 c00c3fa0 c7826000 c7827ed8 c00c3954 c056eb10 60030013 ffffffff
[ 8249.471099] 7ed8 c7807380 c06fd5a0 c7833200 c00c3fb0 00000019 00000002 00000039 00000019
[ 8249.471954] 7ef8 13be7d17 c00b0804 00000000 00000019 00000039 00000002 00000019 00000002
[ 8249.472808] 7f18 00000070 00000000 00000055 c106c3c0 4f6e8995 13be7d17 4f6e8995 05004e76
[ 8249.473571] 7f38 c06fd5a0 c7807380 c06fd5a0 c7833200 c7826000 c00a42f0 c06fd5a8 00000001
[ 8249.474426]
[ 8249.474426] IP: 0xc7825f80:
[ 8249.474578] 5f80 00000001 c01117b4 00186040 00000001 00000036 00186010 00186040 00185fe0
[ 8249.475433] 5fa0 00000036 c004f500 00186010 00186040 0000000a c0186201 5b45be20 5b45be1c
[ 8249.476287] 5fc0 00186010 00186040 00185fe0 00000036 00000001 00185ffc 00185fe8 00000001
[ 8249.477111] 5fe0 401033f4 5b45be00 4002b879 40010680 00000010 0000000a 00000000 00000000
[ 8249.477905] 6000 00000002 00000003 00000000 c7812c80 c06af764 00000000 00000015 c106c3c0
[ 8249.478729] 6020 c7812c80 c7826000 00000000 c068d1c8 c0575940 c5dcfc80 c7827e4c c7827e00
[ 8249.479583] 6040 c056c814 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 8249.480377] 6060 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 8249.481201]
[ 8249.481201] FP: 0xc00c3f20:
[ 8249.481445] 3f20 e00e0c91 e594100c e35e0000 e28ec07f a1a0c00e e1a0c3cc e58dc000 eb12a072
[ 8249.482208] 3f40 eaffffaf e594100c e1a02005 e59f003c eb12a06d eaffffc7 e594100c e59f0030
[ 8249.483062] 3f60 eb12a069 eaffff4c c06fec80 c06b1288 c06fedb0 c05eac44 c067a080 c06b1460
[ 8249.483917] 3f80 c06b1450 c05ea9a4 c05eabfc c05eabcc c05eac18 c05eabb0 e3a02001 eaffff26
[ 8249.484680] 3fa0 e92d40f0 e3a00000 e24dd054 ebfffe4d e3500000 0a000005 e59f3154 e5933000
[ 8249.485534] 3fc0 e3130004 1a000033 e28dd054 e8bd80f0 e59f5140 e59f4138 e595614c eb018d25
[ 8249.486389] 3fe0 e5943000 e3130004 1a00002d e28d0048 ebffc1a6 e59401f4 ebfffbfb e1a07000
[ 8249.487152] 4000 e28d0040 ebffc1a1 e5943000 e3130001 1a000026 e59d3048 e59d2040 e0633002
[ 8249.487945]
[ 8249.487945] R0: 0xc06fec00:
[ 8249.488098] ec00 c06fec00 c06fec00 00000000 00000000 c5aede2c c5aede2c 00000000 00000000
[ 8249.488891] ec20 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 8249.489746] ec40 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 8249.490600] ec60 00000000 00000000 00000000 00000000 00000000 c780f960 c7807e40 c057086c
[ 8249.491394] ec80 00000000 00000000 c06b1448 c06fed20 00000100 c05ead54 00000000 00000000
[ 8249.492156] eca0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 8249.493011] ecc0 00000000 00000000 00000000 00000000 c780fa80 00000000 c616a090 c616a110
[ 8249.493865] ece0 00000100 c05ead78 000ba741 00000000 0000008e 0000008e 00000000 00000000
[ 8249.494720]
[ 8249.494720] R2: 0xc06af7f0:
[ 8249.494873] f7f0 00000018 00000019 0000001a 0000001b 0000001c 0000001d 0000001e 0000001f
[ 8249.495635] f810 00000005 c06dc318 00020000 0000000f 00000004 00000001 00000007 00000000
[ 8249.496429] f830 c06af830 c06af830 00000000 00000000 00000280 0000000a 00000000 00000000
[ 8249.497283] f850 00000000 00000000 00000000 00000001 c06af860 c06af860 00000000 00000000
[ 8249.498107] f870 c06af870 c06af870 00000004 ffffffff 00000000 00000001 00000000 00000000
[ 8249.498962] f890 ffffffff c0091ae0 c06ba3d0 00000000 00000001 00000000 00000000 c06af8ac
[ 8249.499755] f8b0 c06af8ac 00000000 00000000 00000001 00000000 00000000 c06af8c8 c06af8c8
[ 8249.500579] f8d0 00000000 00000000 00000000 c05e6ab0 c05e6ab4 c05e6abc c05e6ac4 c05e6acc
[ 8249.501434]
[ 8249.501434] R7: 0xc7825f80:
[ 8249.501586] 5f80 00000001 c01117b4 00186040 00000001 00000036 00186010 00186040 00185fe0
[ 8249.502441] 5fa0 00000036 c004f500 00186010 00186040 0000000a c0186201 5b45be20 5b45be1c
[ 8249.503265] 5fc0 00186010 00186040 00185fe0 00000036 00000001 00185ffc 00185fe8 00000001
[ 8249.504058] 5fe0 401033f4 5b45be00 4002b879 40010680 00000010 0000000a 00000000 00000000
[ 8249.504913] 6000 00000002 00000003 00000000 c7812c80 c06af764 00000000 00000015 c106c3c0
[ 8249.505767] 6020 c7812c80 c7826000 00000000 c068d1c8 c0575940 c5dcfc80 c7827e4c c7827e00
[ 8249.506561] 6040 c056c814 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 8249.507385] 6060 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 8249.508239]
[ 8249.508239] R9: 0xc06b13d0:
[ 8249.508392] 13d0 00000000 00000000 ffff6a1a 00000000 00000000 00000000 00000000 00000000
[ 8249.509246] 13f0 00000000 c06b13f4 c06b13f4 00000000 00000000 00000000 00000000 00000000
[ 8249.510101] 1410 c06b1410 c06b1410 00000000 00000000 00000000 00000000 00000000 00000000
[ 8249.510864] 1430 00000000 00000000 00000000 00000000 00000000 00000000 c78fa28c c06fec88
[ 8249.511718] 1450 00000200 c06b1454 c06b1454 c00c3fa0 00000000 00200200 000baeeb c06fc500
[ 8249.512573] 1470 c00c3840 00000000 ffffffff 00000003 00000000 00000000 00000000 00000000
[ 8249.513427] 1490 00000000 00000000 00000000 00000000 c00c3964 00000000 00000000 00000000
[ 8249.514221] 14b0 00000000 00000000 00000000 00000000 00000000 00000000 00000001 00000001
[ 8249.515045]
[ 8249.515075] R10: 0xc7833185:
[ 8249.515228] 3184 66706d74 00000073 00000000 00000000 00000000 00000000 00000000 00000000
[ 8249.516082] 31a4 00000000 00000000 00000000 00000000 c780f840 00000000 00000001 00000001
[ 8249.516906] 31c4 00000000 00000000 c78331cc c78331cc 00000000 00000000 00000000 00000000
[ 8249.517700] 31e4 ffffffff 00000000 00000000 00000000 00000000 00000000 00000000 c06fd5a0
[ 8249.518463] 3204 c780fa80 00000000 ffffffff 00000001 00000000 00000000 00000000 00000000
[ 8249.519317] 3224 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 8249.520172] 3244 00000000 00000000 00000001 00000001 c7833254 c7833254 c7833200 00000000
[ 8249.521026] 3264 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 8249.521789] 3284 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 8249.522644] Process kworker/u:0 (pid: 5, stack limit = 0xc78262f8)
[ 8249.522827] Stack: (0xc7827ed8 to 0xc7828000)
[ 8249.522888] 7ec0: c7807380 c06fd5a0
[ 8249.523071] 7ee0: c7833200 c00c3fb0 00000019 00000002 00000039 00000019 13be7d17 c00b0804
[ 8249.523162] 7f00: 00000000 00000019 00000039 00000002 00000019 00000002 00000070 00000000
[ 8249.523315] 7f20: 00000055 c106c3c0 4f6e8995 13be7d17 4f6e8995 05004e76 c06fd5a0 c7807380
[ 8249.523468] 7f40: c06fd5a0 c7833200 c7826000 c00a42f0 c06fd5a8 00000001 c7833200 c7807380
[ 8249.523620] 7f60: c06fd5a0 c06fd5a8 c7807390 c068d1c8 c00488e0 c7826000 00000089 c00a490c
[ 8249.523712] 7f80: c00483c0 c06b26f8 c7807390 c00488e0 c00488e0 c00488e0 c00a4798 c7817ee8
[ 8249.523895] 7fa0: c7827fcc c7807380 c00a4798 00000000 00000000 00000000 00000000 c00aa9e8
[ 8249.524047] 7fc0: c7817ee8 00000000 c7807380 00000000 00000000 00000000 c7827fd8 c7827fd8
[ 8249.524139] 7fe0: 00000000 c7817ee8 c00aa964 c00937f0 00000013 c00937f0 00000000 00000000
[ 8249.524291] Backtrace: frame pointer underflow
[ 8249.524597] Code: e5803000 f57ff04f e320f004 e121f001 (e1a0200d)
[ 8249.524749] Board Information: Tuna HW revision: 09 (Maguro 8th Sample), cpu OMAP4460 ES1.1
[ 8249.524932] ---[ end trace 9ad777b101bc3d62 ]---
[ 8249.525024] Kernel panic - not syncing: Fatal exception
[ 8249.525177] Backtrace:
[ 8249.525390] CPU1: stopping
[ 8249.525451] Backtrace: no frame pointer
[ 8249.525756] Rebooting in 5 seconds..
[ 8253.639282] Restarting Linux version 3.0.8-franco.Kernel-nightly (francisco@francisco.home) (gcc version 4.4.3 (GCC) ) #98 SMP PREEMPT Fri Mar 16 19:09:14 WET 2012
[ 8253.639312]

No errors detected
Boot info:
Last reset was warm software reset (PRM_RSTST=0x2)

Not sure what it means but im guessing its the cause. Also i am NOT using hotplug