On Thu, 28 Dec 2017, Alexandru Chirvasitu wrote: > On Thu, Dec 28, 2017 at 05:10:28PM +0100, Thomas Gleixner wrote: > > On Thu, 28 Dec 2017, Alexandru Chirvasitu wrote: > > > Actually, it decided to cooperate for just long enough for me to get > > > the dmesg out. Attached. > > > > > > This is from the kernel you asked about: Dou's patch + yours, i.e. the > > > latest one in that git log I just sent, booted up with 'apic=debug'. > > > > Ok. As I suspected that warning does not trigger. I would have been > > massively surprised if that happened. So Dou's patch is just a red herring > > and just might change the timing enough to make the problem 'hide'. > > > > Can you try something completely different please? > > > > Just use plain Linus tree without any additional patches on top and disable > > CONFIG_NO_HZ_IDLE, i.e. select CONFIG_HZ_PERIODIC. > > > > If that works, then reenable it and add 'nohz=off' to the kernel command > > line. > > > > No go here I'm afraid: > > Linus' clean 4.15-rc5 compiled with CONFIG_HZ_PERIODIC exhibits the > familiar behaviour: lockups, sometimes instant upon trying to log in, > sometimes logging me in and freaking out seconds later. Ok. So it's not the issue I had in mind. Back to some of the interesting bits in the logs: [ 36.017942] spurious APIC interrupt through vector ff on CPU#0, should never happen. Does that message ever show up in 4.14 or 4.9? Thanks, tglx
