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Tue, 27 Jul 2021 16:23:25 -0700 (PDT) MIME-Version: 1.0 References: <20210714193542.21857-1-joao.m.martins@oracle.com> <20210714144830.29f9584878b04903079ef7eb@linux-foundation.org> <5642c8c3-cf13-33dc-c617-9d1becfba1b1@oracle.com> In-Reply-To: <5642c8c3-cf13-33dc-c617-9d1becfba1b1@oracle.com> From: Dan Williams Date: Tue, 27 Jul 2021 16:23:14 -0700 Message-ID: Subject: Re: [PATCH v3 00/14] mm, sparse-vmemmap: Introduce compound pagemaps To: Joao Martins Cc: Matthew Wilcox , Andrew Morton , Linux MM , Vishal Verma , Dave Jiang , Naoya Horiguchi , Jason Gunthorpe , John Hubbard , Jane Chu , Muchun Song , Mike Kravetz , Jonathan Corbet , Linux NVDIMM , Linux Doc Mailing List Content-Type: text/plain; charset="UTF-8" Authentication-Results: imf16.hostedemail.com; dkim=pass header.d=intel-com.20150623.gappssmtp.com header.s=20150623 header.b=yr6kw4zf; spf=none (imf16.hostedemail.com: domain of dan.j.williams@intel.com has no SPF policy when checking 209.85.216.45) smtp.mailfrom=dan.j.williams@intel.com; dmarc=fail reason="No valid SPF, DKIM not aligned (relaxed)" header.from=intel.com (policy=none) X-Rspamd-Server: rspam02 X-Stat-Signature: f6uahmg9sunizf1ry6sy84c1ynepqeop X-Rspamd-Queue-Id: 9C4D3F0070DB X-HE-Tag: 1627428206-565164 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Jul 22, 2021 at 3:54 AM Joao Martins wrote: [..] > > The folio work really touches the page > > cache for now, and this seems mostly to touch the devmap paths. > > > /me nods -- it really is about devmap infra for usage in device-dax for persistent memory. > > Perhaps I should do s/pagemaps/devmap/ throughout the series to avoid confusion. I also like "devmap" as a more accurate name. It matches the PFN_DEV and PFN_MAP flags that decorate DAX capable pfn_t instances. It also happens to match a recommendation I gave to Ira for his support for supervisor protection keys with devmap pfns.