Re: using kdb on Red Hat/SGI linux-2.4.18-18SGI_XFS_1.2pre5

[Keith Owens <kaos@xxxxxxx>]

On Thu, 06 Feb 2003 17:22:25 -0600, 
"Foris, Jim (MED)" <foris@xxxxxxxxxxxxxxxx> wrote:
>Keith Owens wrote:
>> Use the nmi watchdog, boot with nmi_watchdog=1.
>
>Did that... made no difference.
>
>We think it is because CPU0 handles all NMIs.... so if it dies,
>so does the NMI watchdog.

NMI should be broadcast.  Before the system hangs, cat /proc/interrupts.
The NMI count on each cpu must be non-zero and increasing continuously
if the nmi watchdog is working.

>[1]kdb> bt
>ESP        EIP        Function (args)
>0xc46cde28 0xc01ed880 <unknown>+0xc01ed880
>                                kernel <unknown> 0x0 0x0 0x0
>0xc46cde2c 0xc46cdde0 <unknown>+0xc46cdde0
>                                kernel <unknown> 0x0 0x0 0x0

That is wierd.  grep kallsyms System.map and insmod -nm some_module_name.