> -----Original Message----- > From: ebiederm at xmission.com > Sent: Sat, 13 Jun 2009 05:51:25 -0700 > To: dseetharam at inbox.com > Subject: Re: /var/log/messages doesn't have crash info when kernel gets > panic/oops/crash > > Dharmosoth Seetharam <dseetharam at inbox.com> writes: > >>> -----Original Message----- >>> From: ebiederm at xmission.com >>> Sent: Sat, 13 Jun 2009 00:11:25 -0700 >>> To: dseetharam at inbox.com >>> Subject: Re: /var/log/messages doesn't have crash info when kernel gets >>> panic/oops/crash >>> >>> Dharmosoth Seetharam <dseetharam at inbox.com> writes: >>> >>>> 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? >>> >> Hi Eric, >> >>> Basic questions. >>> 1) Do you have panic on oops set? >>> I think that setting more than anything else will be the >>> difference in what shows up in /var/log/messages. >> >> Yes, in my case panic_on_oops was set with 1 > > That is the reason thing don't show up in /var/log/messages > because you panic before syslog has a chance to write the messages. Thanks. So, if panic_on_oops set with 0(default), we will get all the needed info like stack traces, bug info etc. in /var/log/messages then reboots. Or do we need to apply any specific patches to get info in /var/log/messages? > >>> 2) Have you tried a dry run and confirmed you can get a crash dump? >> >> No, I haven't tried this. > > It sounds like you have not been getting the coredumps when problems > happen. Running a simple test run to Alt-sysrq-c to confirm > that things are basically setup ok is a good idea. > Sorry, I misunderstood your question. I have gave dry run and confirmed that the dumps are getting saved in particular dir and able to analyze. I did in both the ways like 1 - echo c > /proc/sysrq-trigger 2 -Alt -sysrq -c thanks, Seetharam >>> 3) Are you using kvm >> kvm? kernel virtual memory? > > Kernel virtual machine. In particular. > Hardware acceleration for virtual machines. > > Eric ____________________________________________________________ FREE ONLINE PHOTOSHARING - Share your photos online with your friends and family! Visit http://www.inbox.com/photosharing to find out more!
