From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Bharath Ramesh" Subject: RE: Maximum size for memory registration (ibv_reg_mr) Date: Fri, 24 Sep 2010 18:42:10 -0400 Message-ID: <037101cb5c39$b98036f0$2c80a4d0$@edu> References: <036401cb5c35$85829220$9087b660$@edu> Mime-Version: 1.0 Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=SHA1; boundary="----=_NextPart_000_036C_01CB5C18.32342600" Return-path: In-Reply-To: Content-Language: en-us Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: 'Roland Dreier' Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org This is a multi-part message in MIME format. ------=_NextPart_000_036C_01CB5C18.32342600 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit > -----Original Message----- > From: Roland Dreier [mailto:rdreier-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org] > > > Is there any limit on the maximum size of memory that can be > registered > > using ibv_reg_mr. I am using OFED-1.4.2 stack, and when I try to > pass a size > > greater than 16GB ibv_reg_mr returns NULL. The total amount of > physical > > memory on the node is 48GB, max locked memory(ulimit -l) is set to > > unlimited. > > The limit depends on the HCA. max_mr_size returned by calling ibv_devinfo is 0xffffffffffffffff. Does this mean the size is unlimited? 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