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[134.134.136.24]) by mx.google.com with ESMTPS id v1si10376043plp.12.2019.02.11.12.17.04 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 11 Feb 2019 12:17:04 -0800 (PST) Received-SPF: pass (google.com: domain of ira.weiny@intel.com designates 134.134.136.24 as permitted sender) client-ip=134.134.136.24; Authentication-Results: mx.google.com; spf=pass (google.com: domain of ira.weiny@intel.com designates 134.134.136.24 as permitted sender) smtp.mailfrom=ira.weiny@intel.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Feb 2019 12:17:04 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.58,360,1544515200"; d="scan'208";a="319498277" Received: from iweiny-desk2.sc.intel.com ([10.3.52.157]) by fmsmga005.fm.intel.com with ESMTP; 11 Feb 2019 12:17:03 -0800 From: ira.weiny@intel.com To: linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Daniel Borkmann , Davidlohr Bueso , netdev@vger.kernel.org Cc: Mike Marciniszyn , Dennis Dalessandro , Doug Ledford , Jason Gunthorpe , Andrew Morton , "Kirill A. Shutemov" , Dan Williams , Ira Weiny Subject: [PATCH 0/3] Add gup fast + longterm and use it in HFI1 Date: Mon, 11 Feb 2019 12:16:40 -0800 Message-Id: <20190211201643.7599-1-ira.weiny@intel.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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: From: Ira Weiny NOTE: This series depends on my clean up patch to remove the write parameter from gup_fast_permitted()[1] HFI1 uses get_user_pages_fast() due to it performance advantages. Like RDMA, HFI1 pages can be held for a significant time. But get_user_pages_fast() does not protect against mapping of FS DAX pages. Introduce a get_user_pages_fast_longterm() which retains the performance while also adding the FS DAX checks. XDP has also shown interest in using this functionality.[2] [1] https://lkml.org/lkml/2019/2/11/237 [2] https://lkml.org/lkml/2019/2/11/1789 Ira Weiny (3): mm/gup: Change "write" parameter to flags mm/gup: Introduce get_user_pages_fast_longterm() IB/HFI1: Use new get_user_pages_fast_longterm() drivers/infiniband/hw/hfi1/user_pages.c | 2 +- include/linux/mm.h | 8 ++ mm/gup.c | 152 ++++++++++++++++-------- 3 files changed, 114 insertions(+), 48 deletions(-) -- 2.20.1