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Date: Wed, 16 Dec 2015 01:52:22 -0500 From: "ira.weiny" <ira.weiny@...el.com> To: Jason Gunthorpe <jgunthorpe@...idianresearch.com> Cc: Michael Wang <yun.wang@...fitbricks.com>, Nicholas Krause <xerofoify@...il.com>, dledford@...hat.com, sean.hefty@...el.com, hal.rosenstock@...il.com, haggaie@...lanox.com, matanb@...lanox.com, doront@...lanox.com, david.ahern@...cle.com, erezsh@...lanox.com, linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH RESEND] infiniband:core:Add needed error path in cm_init_av_by_path On Tue, Dec 15, 2015 at 10:30:22AM -0700, Jason Gunthorpe wrote: > On Tue, Dec 15, 2015 at 05:38:34PM +0100, Michael Wang wrote: > > The hop_limit is only suggest that the package allowed to be > > routed, not have to, correct? > > If the hop limit is >= 2 (?) then the GRH is mandatory. Yes >= 2. "Setting this value to 0 or 1 will ensure that the packet will not be forwarded beyond the local subnet." -- IBTA 8.3.6 Hop Limit Ira > The > SM will return this information in the PathRecord if it determines a > GRH is required. The whole stack follows this protocol. > > The GRH is optional for in-subnet communications. > > Jason > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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