Hi, > I have several times noticed the following symptoms on SLES8 machines > on zVM440: > - the machine is not reachable on the network > - it does not show any activity on the USER screen of PTK > - there is no I/O outstanding to either Vswitch (eth0) or Hipersockets > (hsi1), which is abnormal > - after a logon to the VM console of the machineit show RUNNING, not CP > READ > - D PSWG shows always the same address, somewhere around x'13000' > > Question: could this be leftover symptoms of an unnoticed kernel oops?
Could be, normally a kernel oops does not stop the kernel, only a panic does. An oops will become a panic if it occurs in an interrupt handler. If you really dont know what went wrong it is always handy to have one spare minidisk for all guest which is prepared with the dump tools. If something goes wrong and the guest is really dead, stop all cpus, store the status, attach the prepared disk und ipl from the disk. Afterwards it is possible to analyse the dump using the lkcdutils (lcrash) which should be part of your distribution. You can find more information about that: http://oss.software.ibm.com/linux390/docu/lx24jun03dt00.pdf The nice thing about that, if there is really an oops, it is usually much easier for SuSE, IBM or your preferred service provider to find and solve your problem if you can provide a dump. > There was nothing in the logs to indicate this, but we have been hit > several times by as yet unidientified root file system full situations. > In that case there couldn't very well be any log entries. What exactly > does SLES do after writing out a kernel oops message? Load some disabled > PSW or what? In case of a kernel panic the kernel loads the disabled PSW, yes. All other cpus get a SIGP stop. -- Mit freundlichen Gr��en / Best Regards / Un cordial saludo Christian Borntr�ger Linux Software Engineer zSeries Linux & Virtualization IBM Deutschland Entwicklung GmbH email: [EMAIL PROTECTED] Tel +49 7031 16 1975 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
