Re: [x86/mm] e2a7dcce31: kernel_BUG_at_arch/x86/mm/tlb.c

Rik van Riel
2017-05-28T14:11:23Z

On Sat, 2017-05-27 at 09:00 -0700, Andy Lutomirski wrote:
> On Sat, May 27, 2017 at 6:31 AM, kernel test robot
> <xiaolong.ye@intel.com> wrote:
> >
> > FYI, we noticed the following commit:
> >
> > commit: e2a7dcce31f10bd7471b4245a6d1f2de344e7adf ("x86/mm: Rework
> > lazy TLB to track the actual loaded mm")
> > https://git.kernel.org/cgit/linux/kernel/git/luto/linux.git
> > x86/tlbflush_cleanup
>
> Ugh, there's an unpleasant interaction between this patch and
> intel_idle.  I suspect that the intel_idle code in question is either
> wrong or pointless,

It would be pointless if my "make lazy TLB mode even lazier"
patch from last year had been applied.

https://patchwork.kernel.org/patch/9307541/

I guess I'll go re-send that and investigate the intel_idle
code in addition to that.