From mboxrd@z Thu Jan 1 00:00:00 1970 From: ira.weiny@intel.com 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> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: Sender: netdev-owner@vger.kernel.org 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 List-Id: linux-rdma@vger.kernel.org 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