On Fri, 18 Jul 2003 19:40:37 -0500,
linas@xxxxxxxxxxxxxx wrote:
>I'm vaguely daydreaming about a few KDB enhancements, I was curious if
>you've thought about them:
>
>-- 'cat /proc/meminfo' Turns out one bug I was chasing was OOM on
> a machine with 32GB of RAM (!) and it took me days to even think
> of looking there.
'sr m', same as sysrq-m.
>-- Support for examining structures symbolically. I've had to walk
> the buffer cache by hand in the past, I've walked task struct
> by hand yesterday, and they guy down the hall stares at network
> structs.
>
> I don't know if it would be better to handle a few of these as
> special-cases in some simple manner, or if some more complex but
> generic mechanism would be better ...
I have considered a generic facility like gdb, based off stabs or dwarf
but decided against it for now. Apart from the complexity of the code,
the stabds/dwarf approach is no good for bit fields.
kdb has various commands for dumping structures including vm data, see
all the code in kdb/modules. Recent versions of kdb added a 'task'
command for dumping and decoding struct task. Another good reason to
upate ppc64 to kdb v4.3 :).
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