------- Comment From dougm...@us.ibm.com 2018-04-24 10:09 EDT------- The two commits that Dwip mentions look very pertinent. There may be others, though, as there appears that a fair amount of work has been done in this area.
I still haven't gotten access to the dump(s), but another issue is that the re-login attempt is started before the delete/free actions complete. This appears to be initiated by qlt_unreg_sess() before scheduling qlt_free_session_done(), so it seems possible that they could race. Those two commits may address this adequately, though. It appears that flaky, or fluttering, FC ports (or fabric) seems to be the cause of this. The login retry is succeeding before the logout/delete/free is fully completed. That may be why we are not reproducing this on other systems - the fabric just does not have the instability seen on boslcp3. At this point, I don't see a connection to KVM or even Ubuntu vs. Pegas. This appears to be something that will happen in any distro that has the right vintage of qla2xxx driver. Not sure why we think this did not happen on Ubuntu -13 kernel - I see nothing in the diffs of qla2xxx that would affect this. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1762844 Title: ISST-LTE:KVM:Ubuntu1804:BostonLC:boslcp3: Host crashed & enters into xmon after moving to 4.15.0-15.16 kernel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1762844/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
