From mboxrd@z Thu Jan 1 00:00:00 1970 From: Doug Ledford Subject: Re: [PATCH] RDMA/cxgb3: fail get_dma_mr if the memory footprint can exceed 32b Date: Fri, 24 Jul 2015 10:44:53 -0400 Message-ID: <55B24F65.5040103@redhat.com> References: <20150722191417.9306.17387.stgit@build2.ogc.int> <55B15D7D.3090601@redhat.com> <00d501d0c599$84afdb50$8e0f91f0$@opengridcomputing.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="wFNONn8gx1tMa3e7kpS91IWCeI0FuHLx0" Return-path: In-Reply-To: <00d501d0c599$84afdb50$8e0f91f0$@opengridcomputing.com> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Steve Wise Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --wFNONn8gx1tMa3e7kpS91IWCeI0FuHLx0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 07/23/2015 06:47 PM, Steve Wise wrote: >> -----Original Message----- From: Doug Ledford >> Should this be a static check of the pointer size versus installed=20 >> memory? Would it be possible to have this work for machines with >> less than 4GB of physical memory even if they have 64bit pointers, >> or are you concerned that hotplug memory could take us over the >> limit after registration and cause problems? >=20 > NFSRDMA doesn't need dma-mrs for T3 since it has FRMR + local dma > lkey support. And since the deficiency really can cause problems on > 64b systems if the memory grows > 4GB after dma-mr allocation, I > decided to just not allow them for potential large memory systems. Ok. I've pulled this for 4.2-rc then. --=20 Doug Ledford GPG KeyID: 0E572FDD --wFNONn8gx1tMa3e7kpS91IWCeI0FuHLx0 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJVsk9lAAoJELgmozMOVy/d/+cQAJv4UA2FDETT9hmzqn9nT41U mMchuiT9m3OhekWo19gaTTXBSN5Jy9MvSw7cvcSA/JqYpHWsz2XOWTrufS05/QqF f+pCzhrHvPlLvKOkh60xe2bUfi7t+7wyEDA7W3GXx5Nqo8ZO5sAtf3PcL14qdaaA S/FrDnlyQZrV6ANW96VwiW8e7mBGZX90ukOTZFo+qWHqRgIblS7ZTwKwpzZHaczR 9C7Lp/mTJqMcOD+c9lNbYq1PJc3pb+FwstA3GhPV7HQP0oqN6/AuZ5ahGLNNyIoX zPrcVVLfu2Sg+B7kSvs+RraJmB+AgqEk1+X+uxs8YXfdRu2VL/ZHAxyllvymvKyo n/c1B+++y6A7NnzVMcqCBqniKIRvHHfM0YeRwAlUU2qngWq/YkWbtLkn5QpTFyq6 9iJLugf3pavFGSqDDD8kTz5ANBIq/CQwhNiO9A79/OGZQHE1lzyWLlEULnG32kKM +2fOU73ykgCte/eRFdS/iWmkcQ/FhgBbk6QLskiBNqaB53+jsFK/koPK1P8IfFj+ yJo9kawNvpj50YappX5n7JyYvmgpNS5tb7QZfT5m+tN/19khhnCvRM6PouDx71ZI 1uyPjQ1zkbVPOrO1qetSIhu0nF8dxNJgKuQsT8DOiLT/v0OBEFGGAqQWDU+G/gzp bW6gTs9f01yXrg+hhK+p =IZjt -----END PGP SIGNATURE----- --wFNONn8gx1tMa3e7kpS91IWCeI0FuHLx0-- -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html