Re: [PATCH 2/6] mm: vmstat: move slab statistics from zone to node counters

Yury Norov
2017-05-31T17:11:51Z

On Wed, May 31, 2017 at 01:39:00PM +0200, Heiko Carstens wrote:
> On Wed, May 31, 2017 at 11:12:56AM +0200, Heiko Carstens wrote:
> > On Tue, May 30, 2017 at 02:17:20PM -0400, Johannes Weiner wrote:
> > > To re-implement slab cache vs. page cache balancing, we'll need the
> > > slab counters at the lruvec level, which, ever since lru reclaim was
> > > moved from the zone to the node, is the intersection of the node, not
> > > the zone, and the memcg.
> > >
> > > We could retain the per-zone counters for when the page allocator
> > > dumps its memory information on failures, and have counters on both
> > > levels - which on all but NUMA node 0 is usually redundant. But let's
> > > keep it simple for now and just move them. If anybody complains we can
> > > restore the per-zone counters.
> > >
> > > Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
> >
> > This patch causes an early boot crash on s390 (linux-next as of today).
> > CONFIG_NUMA on/off doesn't make any difference. I haven't looked any
> > further into this yet, maybe you have an idea?

The same on arm64.

Yury