Yang Zhiguo wrote:
> ----- Original Message -----
> From: "Dave Anderson" <anderson redhat.com>
> To: "Discussion list for crash utility
usage,maintenance and development"
<crash-utilityredhat.com>
> Sent: Monday, April 28, 2008 8:36 PM
> Subject: Re: [Crash-utility] the kmem get some errors
>
>
>> Yang Zhiguo wrote:
>>> hi,
>>>
>>> When i use kmem command on a IA64 with RHEL5.1
as following, there are
>>> some errors.
>>> Anyone can explain it?
>>>
>>> crash> kmem -c
>>> kmem: cannot determine page cache size
>>> crash> kmem -C
>>> kmem: address_space page cache radix tree not
supported
>>> crash> kmem -la
>>> kmem: active_list does not exist in this
kernel
>>> crash> kmem -La
>>> kmem: active_list does not exist in this
kernel
>>> crash> kmem -li
>>> kmem: inactive_list does not exist in this
kernel
>>> crash> kmem -Li
>>> kmem: inactive_list does not exist in this
kernel
>> None of the above are applicable to the RHEL5.1
(2.6.18-based) kernel,
>> because the symbols they reference no longer
exist.
>
> If so, maybe we should explain it in man pages.
Well, this is not uncommon -- because the crash utility
maintains
backwards compatibility, there are numerous command options
that
are no longer applicable, and when they fail, the idea is
to
display a concise error message explaining why they fail.
>
>>> crash> kmem -P e0000001843760c0
>>> <segmentation violation>
>> Shouldn't happen, but the command makes no sense
(e0000001843760c0
>> cannot be a physical address.
>
> An error message may be more better.
>
That's true. On the other arches I've got available, the
command
returns: "<address>: physical address not found
in mem map".
I don't have an ia64 readily available, so I'm not sure
exactly
where it takes the SIGSEGV.
Dave
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