Re: [PATCHv4 00/10] split page table lock for PMD tables

[Kirill A. Shutemov]

Alex Thorlton wrote:
> > > Sorry for the delay on these results.  I hit some strange issues with
> > > running thp_memscale on systems with either of the following
> > > combinations of configuration options set:
> > > 
> > > [thp off]
> > > HUGETLBFS=y
> > > HUGETLB_PAGE=y
> > > NUMA_BALANCING=y
> > > NUMA_BALANCING_DEFAULT_ENABLED=y
> > > 
> > > [thp on or off]
> > > HUGETLBFS=n
> > > HUGETLB_PAGE=n
> > > NUMA_BALANCING=y
> > > NUMA_BALANCING_DEFAULT_ENABLED=y
> > > 
> > > I'm getting segfaults intermittently, as well as some weird RCU sched
> > > errors.  This happens in vanilla 3.12-rc2, so it doesn't have anything
> > > to do with your patches, but I thought I'd let you know.  There didn't
> > > used to be any issues with this test, so I think there's a subtle kernel
> > > bug here.  That's, of course, an entirely separate issue though.
> > 
> > I'll take a look next week, if nobody does it before.
> 
> I'm starting a bisect now.  Not sure how long it'll take, but I'll keep
> you posted.

I don't see the issue. Could you share your kernel config?

-- 
 Kirill A. Shutemov
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