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.

Attached config for verification.


> Thanks,
> 
> 	tglx
>