bugzilla-dae...@bugzilla.kernel.org's on June 7, 2019 4:29 pm: > https://bugzilla.kernel.org/show_bug.cgi?id=203837 > > --- Comment #2 from Paul Mackerras (pau...@ozlabs.org) --- > Just tried 5.1.7 in the host and got the guest locking up during boot. In xmon > I see one cpu in pmdp_invalidate and another in handle_mm_fault. It seems very > possible this is the bug that Nick Piggin's recent patch series fixes > ("powerpc/64s: Fix THP PMD collapse serialisation"): > > http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=112348
It's worth a try, although the bug was introduced around 4.20 and I wasn't able to trigger it on radix, but other timing changes could cause it to trigger I suppose. pdbg (https://github.com/open-power/pdbg) is a useful tool for your BMC that can often get the CPU registers out even for bad crashes, this might help to narrow down the problem without bisecting. Thanks, Nick
