On Thu, 21 Sep 2017 21:10:42 +1000 Michael Ellerman <m...@ellerman.id.au> wrote:
> Nicholas Piggin <npig...@gmail.com> writes: > > > Hi, > > > > Here is the NMI IPI enablement for powernv, which requires > > supported firmware and hardware: > > > > https://lists.ozlabs.org/pipermail/skiboot/2017-September/009111.html > > > > And some preceeding patches that fix issues I ran into when > > testing it. > > Are any of these critical such that I should pick them up for 4.14 or > earlier? Good point, yes. The hardlockup watchdog now does SMP cross-checking, so it can blow up when you stay in xmon for about 10 seconds since the new watchdog was merged. We want patches 3-4 for that. Patch 1 is not really required, I only ran into it when I tried making smp_send_stop use the NMI IPI, which we are not doing just yet. That being said, the watchdog code is new, so probably doesn't hurt to put in 4.14. Patch 3 makes all-cpus backtraces a bit more concise. Less critical. The system reset stuff I guess we'll want to backport for distros, so 4.14 might be reasonable not sure. Actually patch 5 before you merge it I should remove the DD1 workaround too because we're not supporting that in OPAL anymore. Thanks, Nick