Re: [PATCH v2 0/4] dax: require 'struct page' and other fixups
On Sun, Oct 1, 2017 at 2:59 PM, Dave Chinner <david(a)fromorbit.com> wrote:
[..]
The "capacity tax" had nothing to do with it - the major
problem
with self hosting struct pages was that page locks can be hot and
contention on them will rapidly burn through write cycles on the
pmem. That's still a problem, yes?
It was an early concern we had, but it has not born out in practice,
and stopped worrying about it 2 years ago when the ZONE_DEVICE
infrastructure was merged.