On Thu, 12 Apr 2018 08:13:43 -0400 Rick Barlow <[email protected]> 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 > were recently patched to kernel level "2.6.32-696.23.1.el6.s390x #1 SMP Sat > Feb 10 11:11:31 EST 2018". It does not affect all of our servers that were > recently patched. I suspect that it might be related to patches related to > Spectre. I did a google search and did not get any hits on the message. I > expect our Linux team will contact Red Hat support. Program check 28 is ALET-specification exception. It is very unlikely that Linux causes this exception. The only piece of code that uses the access register mode is the clock_gettime() function in the vdso code. And then only for the CPUCLOCK_VIRT clock source with a constant ALET. -- blue skies, Martin. "Reality continues to ruin my life." - Calvin. ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
