On Sun, 1 Oct 2017 16:15:06 -0700 Dan Williams <dan.j.williams@xxxxxxxxx> wrote: > On Sun, Oct 1, 2017 at 2:59 PM, Dave Chinner <david@xxxxxxxxxxxxx> 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. These are weighty matters and should have been covered in the changelogs, please. Could you send along a few paragraphs which summarise these thoughts and I'll add them in?
