Messages in this thread | | | From | Dan Williams <> | Date | Mon, 29 Oct 2018 23:55:12 -0700 | Subject | Re: [PATCH v5 4/4] mm: Defer ZONE_DEVICE page initialization to the point where we init pgmap |
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On Mon, Oct 29, 2018 at 11:29 PM Michal Hocko <mhocko@kernel.org> wrote: > > On Mon 29-10-18 12:59:11, Alexander Duyck wrote: > > On Mon, 2018-10-29 at 19:18 +0100, Michal Hocko wrote: [..] > > The patches Andrew pushed addressed the immediate issue so that now > > systems with nvdimm/DAX memory can at least initialize quick enough > > that systemd doesn't refuse to mount the root file system due to a > > timeout. > > This is about the first time you actually mention that. I have re-read > the cover letter and all changelogs of patches in this serious. Unless I > have missed something there is nothing about real users hitting issues > out there. nvdimm is still considered a toy because there is no real HW > users can play with.
Yes, you have missed something, because that's incorrect. There's been public articles about these parts sampling since May.
https://www.anandtech.com/show/12828/intel-launches-optane-dimms-up-to-512gb-apache-pass-is-here
That testing identified this initialization performance problem and thankfully got it addressed in time for the current merge window.
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