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[2607:7c80:54:e::133]) by mx.google.com with ESMTPS id c8si992462pfn.208.2019.06.05.23.18.31 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 05 Jun 2019 23:18:31 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of batv+2a9871a3a082cf6dc382+5765+infradead.org+hch@bombadil.srs.infradead.org designates 2607:7c80:54:e::133 as permitted sender) client-ip=2607:7c80:54:e::133; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=bombadil.20170209 header.b=hh3vfV36; spf=pass (google.com: best guess record for domain of batv+2a9871a3a082cf6dc382+5765+infradead.org+hch@bombadil.srs.infradead.org designates 2607:7c80:54:e::133 as permitted sender) smtp.mailfrom=BATV+2a9871a3a082cf6dc382+5765+infradead.org+hch@bombadil.srs.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=U8rF1uP19dnET207DcY9H/fsoaYvyqbT8DVHn5K5oRM=; b=hh3vfV36YrLiF3AZvb2T4/Qsm ZGpgeScpxKnNf0aS2baD3ki47trw/uHctB3wKBpv6V6SbCMpk2PfbKUk/5XgM8HNDjclepJ9Zdbz6 2GcqhtFfRtwgOlRsLz0gTHbH/QD8c0RD1Nwv73lkSzrx4ZW4CsWVtPnTSaYKb7q2DM4NJWtdmuwyk Ib935aW8MHP3OauCGnonYIxkH5L3VSyJFRXG0U2YAfTuXHF11OiwL/C6RfAmS9J4JPPN67De362rW nJke29YpqUQ+h0Q/HmV6zGVwwZQCpJPnOD1sInPHpqtie3EXgVS+P5THX1FahoL367+4HTT4+qz1H qcJ4t2xpQ==; Received: from hch by bombadil.infradead.org with local (Exim 4.90_1 #2 (Red Hat Linux)) id 1hYljA-0005QG-0s; Thu, 06 Jun 2019 06:18:20 +0000 Date: Wed, 5 Jun 2019 23:18:19 -0700 From: Christoph Hellwig To: ira.weiny@intel.com Cc: Dan Williams , Jan Kara , Theodore Ts'o , Jeff Layton , Dave Chinner , Matthew Wilcox , linux-xfs@vger.kernel.org, Andrew Morton , John Hubbard , =?iso-8859-1?B?Suly9G1l?= Glisse , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-ext4@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH RFC 03/10] mm/gup: Pass flags down to __gup_device_huge* calls Message-ID: <20190606061819.GA20520@infradead.org> References: <20190606014544.8339-1-ira.weiny@intel.com> <20190606014544.8339-4-ira.weiny@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190606014544.8339-4-ira.weiny@intel.com> User-Agent: Mutt/1.9.2 (2017-12-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html 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 Wed, Jun 05, 2019 at 06:45:36PM -0700, ira.weiny@intel.com wrote: > From: Ira Weiny > > In order to support checking for a layout lease on a FS DAX inode these > calls need to know if FOLL_LONGTERM was specified. > > Prepare for this with this patch. The GUP fast argument passing is a mess. That is why I've come up with this as part of the (not ready) get_user_pages_fast_bvec implementation: http://git.infradead.org/users/hch/misc.git/commitdiff/c3d019802dbde5a4cc4160e7ec8ccba479b19f97