From mboxrd@z Thu Jan 1 00:00:00 1970 From: Doug Ledford Subject: Re: Kernel fast memory registration API proposal [RFC] Date: Tue, 14 Jul 2015 23:05:06 -0400 Message-ID: <55A5CDE2.4060904@redhat.com> References: <559F8BD1.9080308@dev.mellanox.co.il> <20150713163015.GA23832@obsidianresearch.com> <55A4CABC.5050807@dev.mellanox.co.il> <20150714153347.GA11026@infradead.org> <20150714155340.GA7399@obsidianresearch.com> <55A53CFA.7070509@dev.mellanox.co.il> <20150714170808.GA19814@obsidianresearch.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="QnLHnJ7PFswNMJdfR739hmmD3sAmL0Hrl" Return-path: In-Reply-To: <20150714170808.GA19814-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Jason Gunthorpe , Sagi Grimberg Cc: Christoph Hellwig , "linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , Steve Wise , Or Gerlitz , Oren Duer , Chuck Lever , Bart Van Assche , Liran Liss , "Hefty, Sean" , Tom Talpey List-Id: linux-rdma@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --QnLHnJ7PFswNMJdfR739hmmD3sAmL0Hrl Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable On 07/14/2015 01:08 PM, Jason Gunthorpe wrote: > On Tue, Jul 14, 2015 at 07:46:50PM +0300, Sagi Grimberg wrote: >> Which drivers doesn't support FRWR that we need to do other things? >> ipath - depracated >=20 > We have permission to move this to staging and then RM it, so yay! Correct. >> mthca - soon to be deprecated >=20 > This one I have a problem with. There is alot of mthca hardware out > there, it feels wrong to nuke it.. If we can continue to support the > FMR scheme it uses transparently, that would be excellent. >=20 > I'm not hearing a strong reason why that shouldn't be the case... I'm not so sure about deprecating mthca either. There are still a number of people I know that like to buy cheap SDR/DDR switches on EBay and pair them with cheap mthca cards and have cheap 10/20GBit/s home networks. We have a couple people inside Red Hat that occasionally tell people what to look for on EBay to do just this. >> ehca - Not sure what is going on there. they only have phys_mr >> anyway, which just lost its only caller in the kernel >=20 > I thought it supported fmr: >=20 > drivers/infiniband/hw/ehca/ehca_main.c: shca->ib_device.alloc_fmr = =3D ehca_alloc_fmr; > drivers/infiniband/hw/ehca/ehca_main.c: shca->ib_device.map_phys_fmr = =3D ehca_map_phys_fmr; > drivers/infiniband/hw/ehca/ehca_main.c: shca->ib_device.unmap_fmr = =3D ehca_unmap_fmr; > drivers/infiniband/hw/ehca/ehca_main.c: shca->ib_device.dealloc_fmr = =3D ehca_dealloc_fmr; >=20 > ? >=20 > I'm not sure what the status of ehca is, but I somehow suspect any > remaining users are going to be on an old vendor kernel forever.. Nothing of note has been done on ehca for a long time, and I wouldn't be surprised if there is some bit rot in this driver. We need to speak with IBM, but I think it's a candidate for future removal. --=20 Doug Ledford GPG KeyID: 0E572FDD --QnLHnJ7PFswNMJdfR739hmmD3sAmL0Hrl 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/ iQIcBAEBCAAGBQJVpc3iAAoJELgmozMOVy/dgUoQAKNeDxNXFJGUl7oRRd5AVmMr bhYexuOYwJHFNOcU70ShFxI7d2x70YxQaBd37yjxVDHuVNqhgxIdj2O6ELjIibu+ ZYhnMke25drfzY90M3CgC8zljx4P5bnmq9XjEjSMkI+vltPerd/aJj9T6S+xhmKs 8wufubOGsOvEhf+4QvdqFQzqRC+h46+Au0/haaOZTMqptyVnvZH+5bJx6h7YPv2s p5e7Byo1KSL5LMRqrE8kZZRqHTYqJFq82jJTuyi1O4oAhPMK2JyPbnAbE6R2HGIU 4a2JzZHg+OVb0ldkPfxXT9BHg39bytoz1NWrR87jHvrTgKsAOSzhwYUxQcGZcB7Y uFj4C1ojAmbHnuQma1jGazxv9OgYO4Kmmp02EtVPqv/Nr1epjvkEe6//ziMKtno/ E1gYiJVtUMQZu0l41r6gTYyLLJ1D1R5NeDEc5zuvJhWeYjaE9gC6mbnOtU+peC5O bEYjZuycFQ588KDkDhQfr1dxHVkFOxO3hqXDIHsbtCzMqicP8REGJoju5rIcd0CT MxuFKTiTCAe08K6UikCKYF2uObJq7pcNbqIaDxWD9J0fLg7IHylCwAl1+Q6POR4k n2hOSaX+cH0DChtdDH5gtqkcTyfee2jJGyd114G0De6PgOI8CrF8JsThcdbp8IUn +LMZMvl+OHD0yCL76H+K =1ts2 -----END PGP SIGNATURE----- --QnLHnJ7PFswNMJdfR739hmmD3sAmL0Hrl-- -- 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