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Date: Tue, 26 Mar 2019 12:19:02 +0000 From: Jonathan Cameron <jonathan.cameron@...wei.com> To: Dan Williams <dan.j.williams@...el.com> CC: Brice Goglin <Brice.Goglin@...ia.fr>, Yang Shi <yang.shi@...ux.alibaba.com>, Michal Hocko <mhocko@...e.com>, Mel Gorman <mgorman@...hsingularity.net>, Rik van Riel <riel@...riel.com>, "Johannes Weiner" <hannes@...xchg.org>, Andrew Morton <akpm@...ux-foundation.org>, "Dave Hansen" <dave.hansen@...el.com>, Keith Busch <keith.busch@...el.com>, Fengguang Wu <fengguang.wu@...el.com>, "Du, Fan" <fan.du@...el.com>, "Huang, Ying" <ying.huang@...el.com>, Linux MM <linux-mm@...ck.org>, "Linux Kernel Mailing List" <linux-kernel@...r.kernel.org> Subject: Re: [RFC PATCH 0/10] Another Approach to Use PMEM as NUMA Node On Mon, 25 Mar 2019 16:37:07 -0700 Dan Williams <dan.j.williams@...el.com> wrote: > On Mon, Mar 25, 2019 at 4:09 PM Brice Goglin <Brice.Goglin@...ia.fr> wrote: > > > > > > Le 25/03/2019 à 20:29, Dan Williams a écrit : > > > Perhaps "path" might be a suitable replacement identifier rather than > > > type. I.e. memory that originates from an ACPI.NFIT root device is > > > likely "pmem". > > > > > > Could work. > > > > What kind of "path" would we get for other types of memory? (DDR, > > non-ACPI-based based PMEM if any, NVMe PMR?) > > I think for memory that is described by the HMAT "Reservation hint", > and no other ACPI table, it would need to have "HMAT" in the path. For > anything not ACPI it gets easier because the path can be the parent > PCI device. > There is no HMAT reservation hint in ACPI 6.3 - but there are other ways of doing much the same thing so this is just a nitpick. J
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