how to enable linux box to dump crash image on local disk

[amit mehta]

>   It seems there is a bugzilla from Red Hat on this issue(680864) in RHEL
> 6.0 kernel. Please could you try this issue on RHEL 6.1 kernel ?
>  Also as mentioned in the
> https://bugzilla.redhat.com/show_bug.cgi?id=680864, which is similar to your
> issue, you should be able to see the output of bt command and log command in
> the crash sesion. Please have a look at and let us know what you see.
>
> Regards,
> Sumeet


It seems that it was a memory issue(not enough memory) to enable crash dump.
Today, after migrating my machine to RHEL 6.1 and bumping up the memory,
i was able to get the kernel crash dump and could analyze it using crash
utility.

Thanks again for your help.
<<<snip from sample forced crash>>
crash> bt
PID: 19208  TASK: ffff8801540200c0  CPU: 3   COMMAND: "bash"
 #0 [ffff88003778d9e0] machine_kexec at ffffffff810310db
 #1 [ffff88003778da40] kimage_free_pages at ffffffff810b63b2
 #2 [ffff88003778dac8] hvc_write_room at ffffffff8131abc6
 #3 [ffff88003778db10] setjmp_pre_handler at ffffffff814dec50
 #4 [ffff88003778db40] no_context at ffffffff81040cdb
 #5 [ffff88003778db90] __bad_area_nosemaphore at ffffffff81040f65
 #6 [ffff88003778dbe0] bad_area_access_error at ffffffff8104108e
 #7 [ffff88003778dc10] __do_page_fault at ffffffff810417b3
 #8 [ffff88003778dd30] __unregister_kprobe_top at ffffffff814e0c3e
 #9 [ffff88003778dd60] oops_end at ffffffff814ddfe5
#10 [ffff88003778dde8] hvc_write_room at ffffffff8131abc6
#11 [ffff88003778de20] destroy_hvc_struct at ffffffff8131ae82
#12 [ffff88003778de70] hvc_hangup at ffffffff8131af3e
#13 [ffff88003778dea0] proc_reg_unlocked_ioctl at ffffffff811d4ffe
#14 [ffff88003778def0] default_llseek at ffffffff81172718
#15 [ffff88003778df00] destroy_watch at ffffffff810d1b62
#16 [ffff88003778df30] sys_pread64 at ffffffff81173151
    RIP: 0000003b158d95e0  RSP: 00007fff4e780008  RFLAGS: 00000202
    RAX: 0000000000000001  RBX: ffffffff8100b172  RCX: 00007fff4e780098
    RDX: 0000000000000002  RSI: 00007f13cb5d7000  RDI: 0000000000000001
    RBP: 00007f13cb5d7000   R8: 000000000000000a   R9: 00007f13cb5c8700
    R10: 00000000ffffffff  R11: 0000000000000246  R12: 0000000000000002
    R13: 0000003b15b8b780  R14: 0000000000000002  R15: 0000003b15b8b780
    ORIG_RAX: 0000000000000001  CS: 0033  SS: 002b
<<<snip from sample forced crash>>

-Amit