Re: RHEL 6.9 servers getting Unknown program exception: 0028 SMP

on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Bill Bitner Sent: Friday, April 13, 2018 9:37 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: RHEL 6.9 servers getting Unknown program exception: 0028 SMP Rick, As we discussed on phone, but for benefit of others. My last append forgot to point

Re: RHEL 6.9 servers getting Unknown program exception: 0028 SMP

Rick, As we discussed on phone, but for benefit of others. My last append forgot to point out that the TRACE needs to be done for all the virtual processors in the virtual machine. Otherwise only, only the base VMDBK is protected. This can be done by using the "CPU" command: CPU ALL CMD TRACE

Re: RHEL 6.9 servers getting Unknown program exception: 0028 SMP

The circumvention of using the TRACE PROG 28 did not work for us. We had some servers that failed and could not re-boot - most likely related to the trace being active. We are booting Linux back to the older kernel level that was not experiencing the problem - 2.6.32-696.18.7.el6.s390x. Clearly

Re: RHEL 6.9 servers getting Unknown program exception: 0028 SMP

@VM.MARIST.EDU Subject: Re: RHEL 6.9 servers getting Unknown program exception: 0028 SMP [External Content] Please use caution. Rick, Terri, Greg, and others, apologies I should have given out the PTF numbers and a little more background on my earlier append. APAR VM65396 PTF UM34851 is the one

Re: RHEL 6.9 servers getting Unknown program exception: 0028 SMP

Rick, Terri, Greg, and others, apologies I should have given out the PTF numbers and a little more background on my earlier append. APAR VM65396 PTF UM34851 is the one that introduced the prog check problem. We discovered the problem February 26th, and marked VM65396 in error on March 1st with

Re: RHEL 6.9 servers getting Unknown program exception: 0028 SMP

Thanks Bill. I was a little suspicious of VM65414. However, VM65396 has been on these LPARs since March (before I knew about the later PTF) and we did not see any problems until Linux got patched this week. I guess I will have to scramble to get another VM IPL. 8-\ Rick Barlow On Thu, Apr 12,

Re: RHEL 6.9 servers getting Unknown program exception: 0028 SMP

Greg, For information on vulnerabilities, please see the IBM Z Security Portal. Information on the portal can be found if you page down slightly on https://www.ibm.com/it-infrastructure/z/capabilities/system-integrity Regards, Bill

Re: RHEL 6.9 servers getting Unknown program exception: 0028 SMP

On Thu, 12 Apr 2018 08:13:43 -0400 Rick Barlow wrote: > We have started seeing a rash of errors on some of our Linux virtual > servers. The message we see on the virtual machine console is "Unknown > program exception: 0028 [#1] SMP". It appears to only affect servers that >

Re: RHEL 6.9 servers getting Unknown program exception: 0028 SMP

) 261-6883 (W) -Original Message- From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of Bill Bitner Sent: Thursday, April 12, 2018 7:26 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: RHEL 6.9 servers getting Unknown program exception: 0028 SMP [External Content] Please use

Re: RHEL 6.9 servers getting Unknown program exception: 0028 SMP

Bill, Has the dust settled now on the z/VM Spectre fixes? We put on VM65396 as well on a couple of systems then halted that until further fixes arrive. On 4/12/2018 7:26 AM, Bill Bitner wrote: Rick, if you have VM65396 on, but not VM65414, that would be my guess. VM65414 corrected a problem

Re: RHEL 6.9 servers getting Unknown program exception: 0028 SMP

Rick, if you have VM65396 on, but not VM65414, that would be my guess. VM65414 corrected a problem introduced by VM65396 where a guest could erroneously be given a program check 28. ___ Bill Bitner - z/VM

RHEL 6.9 servers getting Unknown program exception: 0028 SMP

We have started seeing a rash of errors on some of our Linux virtual servers. The message we see on the virtual machine console is "Unknown program exception: 0028 [#1] SMP". It appears to only affect servers that were recently patched to kernel level "2.6.32-696.23.1.el6.s390x #1 SMP Sat Feb 10