From mboxrd@z Thu Jan 1 00:00:00 1970 From: Or Gerlitz Subject: Re: no-snoop flag in memory registration? Date: Thu, 25 Oct 2012 17:49:55 +0200 Message-ID: <50895FA3.1090204@mellanox.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Klaus Wacker Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org On 23/10/2012 16:32, Klaus Wacker wrote: > we are implementing a Linux/RDMA solution based on Mellanox/RoCE. Our= memory registration is done via "ib_get_dma_mr()". During a problem fo= llow-up someone asked us about the "no-snoop" flag and how it is set du= ring memory registration in Linux. Can you describe the problem you are trying to solve and what is the=20 semantics you are looking for with "no snoop" -- which snooping and by=20 what entity. Or. > I digged into > drivers/net/ethernet/mellanox/mlx4/mr.c, to find some MLX4_MPT_FLAGS_ > visible there. Nothing seems to be related to a "no-snoop" flag. > Can anybody shed some light on this, whether we can set the so called > "no-snoop" flag, or is that beyond the scope of Linux support. > > Kind regards > Klaus Wacker > IBM Systems &Technology Group, Systems Software Development > SW Linux on System z Dev & Service > Phone: +49-7031-16-3779 IBM Deutschland E-Mail: kdwacker-JZgbryFSZvw@public.gmane.org= com > Schoenaicher Str. 220 71032 Boeblingen Germany > IBM Deutschland Research & Development GmbH / Vorsitzende des > Aufsichtsrats: Martina Koederitz > Gesch=E4ftsf=FChrung: Dirk Wittkopp > Sitz der Gesellschaft: B=F6blingen / Registergericht: Amtsgericht Stu= ttgart, > HRB 243294 > > -- > 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 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" i= n the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html