The whole discussion seems to be going back and forth and is rather confusing. On one side there is the ceph discussion where Stefan Priebe indeed mentions that he has many more patches in his tree. On the other side there is the LKML discussion which ends in GregKH getting exactly one patch submitted for 4.4 and 4.6 (https://lkml.org/lkml/2016/7/12/297). This is the backport of the last of the 3 patches in comment #11. I am not sure whether Peter Zijlstra just as well got confused in the end or it turned out that in older kernels one only needed the last one. From the references in the patches, the last one refers to the second and the second refers to the first. Practically the last one works around certain values becoming 0 in certain corner cases. Which causes the divide errors. So maybe it is enough.
As for the last test kernel done by Tim: although is answer when I asked about what was in there sounded like it might be the same set, I am starting to doubt that from the time-line. That kernel was done in April and all three patches I had were 4.7-rc1 or later which looks to be from May. So I cannot really believe that those were in discussion back then. So what I would like to propose: I created a PPA and uploaded a kernel with just the last patch applied (https://launchpad.net/~smb/+archive/ubuntu/xenial/+packages). This is the state that is queued upstream for 4.4.x longterm (but not yet released). Someone who can see the issue should actually test this kernel. Regardless of any reports on the ceph list. Because if this does not fix the problem this should be discussed upstream. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1568729 Title: divide error: 0000 [#1] SMP in task_numa_migrate - handle_mm_fault To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1568729/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
