Re: [PATCH 13/35] autonuma: add page structure fields

Peter Zijlstra
2012-05-29T16:57:25Z

On Tue, 2012-05-29 at 12:46 -0400, Rik van Riel wrote:
> > I don't think it's too great, memcg uses for half of that and yet
> > nobody is booting with cgroup_disable=memory even on not-NUMA servers
> > with less RAM.

Right, it was such a hit we had to disable that by default on RHEL6.

> Not any more.

Right, hnaz did great work there, but wasn't there still some few pieces
of the shadow page frame left? ISTR LSF/MM talk of moving the last few
bits into the regular page frame, taking the word that became available
through: fc9bb8c768 ("mm: Rearrange struct page").