User`s guide

Troubleshooting 198
Saving Kernel Fault (OOPS)
You can use the following command to check for the kernel messages that should be reported to
Parallels Server Bare Metal developers:
grep -E "Call Trace|Code" /var/log/messages*
Then, you should find kernel-related lines in the corresponding log file and figure out what
kernel was booted when the oops occurred. Search backward for the "Linux" string, look for
strings like that:
Sep 26 11:41:12 kernel: Linux version 2.6.18-8.1.1.el5.028stab043.1
(root@rhel5-32-build) (gcc version 4.1.1 20061011 (Red Hat 4.1.1-30)) #1 SMP
Wed Aug 29 11:51:58 MSK 2007
An oops usually starts with some description of what happened and ends with the Code string.
Here is an example:
Aug 25 08:27:46 boar BUG: unable to handle kernel NULL pointer dereference at
virtual address 00000038
Aug 25 08:27:46 boar printing eip:
Aug 25 08:27:46 boar f0ce6507
Aug 25 08:27:46 boar *pde = 00003001
Aug 25 08:27:46 boar Oops: 0000 [#1]
Aug 25 08:27:46 boar SMP
Aug 25 08:27:46 boar last sysfs file:
Aug 25 08:27:46 boar Modules linked in: snapapi26(U) bridge(U) slm_dmprst(U)
ip_vzredir(U) vzredir(U) vzcompat(U) vzrst(U) i
p_nat(U) vzcpt(U) ip_conntrack(U) nfnetlink(U) vzfs(U) vzlinkdev(U)
vzethdev(U) vzevent(U) vzlist(U) vznet(U) vzstat(U) vzmo
n(U) xt_tcpudp(U) ip_vznetstat(U) vznetstat(U) iptable_mangle(U)
iptable_filter(U) ip_tables(U) slm_kill(U) slm_nofork(U) slm_core(U)
slm_skill(U) slm_if(U) vztable(U) vzdquota(U) vzdev(U) autofs4(U) hidp(U)
rfcomm(U) l2cap(U) bluetooth(U) sunrpc(U) ipv6(U) xt_length(U) ipt_ttl(U)
xt_tcpmss(U) ipt_TCPMSS(U) xt_multiport(U) xt_limit(U) ipt_tos(U)
ipt_REJECT(U) x_tables(U) video(U) sbs(U) i2c_ec(U) button(U) battery(U)
asus_acpi(U) ac(U) lp(U) floppy(U) sg(U) pcspkr(U) i2c_piix4(U) e100(U)
parport_pc(U) i2c_core(U) parport(U) cpqphp(U) eepro100(U) mii(U) serio_raw(U)
ide_cd(U) cdrom(U) ahci(U) libata(U) dm_snapshot
(U) dm_zero(U) dm_mirror(U) dm_mod(U) megaraid(U) sym53c8xx(U)
scsi_transport_spi(U) sd_mod(U) scsi_mod(U) ext3(U) jbd(U) ehci_hcd(U)
ohci_hcd(U) uhci_hcd(U)
Aug 25 08:27:46 boar CPU: 1, VCPU: -1.1
Aug 25 08:27:46 boar EIP: 0060:[<f0ce6507>] Tainted: P VLI
Aug 25 08:27:46 boar EFLAGS: 00010246 (2.6.18-028stab043.1-ent #1)
Aug 25 08:27:46 boar EIP is at clone_endio+0x29/0xc6 [dm_mod]
Aug 25 08:27:46 boar eax: 00000010 ebx: 00000001 ecx: 00000000 edx:
00000000
Aug 25 08:27:46 boar esi: 00000000 edi: b6f52920 ebp: c1a8dbc0 esp:
0b483e38
Aug 25 08:27:46 boar ds: 007b es: 007b ss: 0068
Aug 25 08:27:46 boar Process swapper (pid: 0, veid: 0, ti=0b482000
task=05e3f2b0 task.ti=0b482000)
Aug 25 08:27:46 boar Stack: 0b52caa0 00000001 00000000 b6f52920
00000000f0ce64de 00000000 02478825
Aug 25 08:27:46 boar 00000000 c18a8620 b6f52920 271e1a8c 024ca03800000000
00000000 00000000
Aug 25 08:27:46 boar 00000000 00000000 c18a3c00 00000202 c189e89400000006
00000000 05cb7200
Aug 25 08:27:46 boar Call Trace:
Aug 25 08:27:46 boar [<f0ce64de>] clone_endio+0x0/0xc6 [dm_mod]
Aug 25 08:27:46 boar [<02478825>] bio_endio+0x50/0x55
Aug 25 08:27:46 boar [<024ca038>] __end_that_request_first+0x185/0x47c
Aug 25 08:27:46 boar [<f0c711eb>] scsi_end_request+0x1a/0xa9 [scsi_mod]
Aug 25 08:27:46 boar [<02458f04>] mempool_free+0x5f/0x63