Re: /var/log/messages doesn't have crash info when kernel gets panic/oops/crash

From: Dharmosoth Seetharam <dseetharam@inbox.com>
To: Neil Horman <nhorman@redhat.com>
Cc: fastboot@lists.linux-foundation.org, vgoyal@in.ibm.com,
	kexec@lists.infradead.org,
	"Eric W. Biederman" <ebiederm@xmission.com>
Subject: Re: /var/log/messages doesn't have crash info when kernel gets panic/oops/crash
Date: Fri, 12 Jun 2009 23:01:35 -0800	[thread overview]
Message-ID: <9C8DECFB07C.00000038dseetharam@inbox.com> (raw)
In-Reply-To: <20090612200513.GA2953@hmsreliant.think-freely.org>

Hi Neil,

Thanks for your quick reply.

What you have suggested is nice when we got/save crash dump (i.e vmcore)
What if we failed to save/capture vmcore info or vmcore is corrupted etc. then we dont get any information
regarding the panic/crash/oops at anywhere?

Thanks and Regards

 Seetharam

> -----Original Message-----
> From: nhorman@redhat.com
> Sent: Fri, 12 Jun 2009 16:05:13 -0400
> To: dseetharam@inbox.com
> Subject: Re: /var/log/messages doesn't have crash info when kernel gets
> panic/oops/crash
> 
> On Fri, Jun 12, 2009 at 01:25:49AM -0800, Dharmosoth Seetharam wrote:
>> Hi,
>> 
>> I have encounter a problem called /var/log/messages does not contain any
>> information
>> on kernel crash dump.
>> 
>> Prior to enabling KEXEC we saw stack traces and bug info etc in
>> /var/log/messages.
>> After enabling KEXEC feature those info was missed.
>> 
>> How can we get those missed info in /var/log/messages even when KEXEC
>> feature is enabled.
>> 
>> Any help will appreciate.
>> 
> run crash on the resultant vmcore file that kexec can produce/save and
> get the
> dmesg log out of it.
> alternatively you can use makedumpfile with the --dump-dmesg log
> 
> Neil
> 
>> 
>> Thanks and Regards
>> Seetharam
>> 
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