Re: [Crash-utility] the kmem get some errors
Yang Zhiguo wrote:
----- Original Message -----
From: "Dave Anderson" <anderson(a)redhat.com>
To: "Discussion list for crash utility usage,maintenance and development"
<crash-utility(a)redhat.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are no longer applicable, and when they fail, the idea is to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