------- Comment From [email protected] 2017-08-18 07:05 EDT------- I have added three patches to replace the test patch that Heiko already marked as invalid:
0001-s390-mm-no-local-TLB-flush-for-clearing-by-ASCE-IDTE.patch 0002-s390-mm-fix-local-TLB-flushing-vs.-detach-of-an-mm-a.patch 0003-s390-mm-fix-race-on-mm-context.flush_mm.patch The first is an upstream patch which removes the code that tries to use the local flushing option on an IDTE clearing-by-ASCE instruction. The local flushing option only exists for IDTE invalidation-and-clearing. Patches #2 and #3 fix race conditions in the architecture specific TLB flushing code. I have run my TLB stress tests on a z/VM guest with 4 CPUs for a few hours with the three patches applied. Nothing undue happened, but my TLB stress did run without these patches as well. Seems like we need the specific timing of the workload to trigger the problem. Now, if you could run a test for us with these patches applied and the bug does not show up again, I would declare these patches as final solution. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1708399 Title: kernel panic -not syncing: Fatal exception: panic_on_oops To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1708399/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
