On Mon, Oct 28, 2019 at 11:40:19AM -0700, Bjorn Andersson wrote:
> On Mon 28 Oct 10:48 PDT 2019, Mark Brown wrote:
> > On Mon, Oct 28, 2019 at 08:03:08AM -0700, kernelci.org bot wrote:

> > Today's -next (anf Friday's) fails to boot on db820c:

> > >     defconfig:
> > >         gcc-8:
> > >             apq8096-db820c: 1 failed lab

> > It looks like it deadlocks somewhere, the last things in the log are a
> > failure to start ufshcd-qcom and then an RCU stall some time later:

> db820c has been failing intermittently for a while now, it seems that
> booting with kpti enabled causes something to go wrong. There are
> nothing strange in the kernel logs and ftrace seems to indicate that all
> the CPUs are idling nicely.

Oh dear.  Adding Catalin and Will.  Is it definitely KPTI that's
triggering stuff?  It did turn up some bugs on other systems, though
it's a bit strange it's only manifesting in KernelCI...