From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: [PATCH rdma-next 0/2] Introduce an IB device's scatter end padding capability Date: Wed, 18 Oct 2017 00:12:59 -0700 Message-ID: <20171018071258.GA32583@infradead.org> References: <20171017151857.11934-1-leon@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20171017151857.11934-1-leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Leon Romanovsky Cc: Doug Ledford , linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-rdma@vger.kernel.org On Tue, Oct 17, 2017 at 06:18:55PM +0300, Leon Romanovsky wrote: > There are PCIe root complex that are able to optimize their > performance when incoming data is multiple full cache lines. > > Expose the device capability to pad the ending of incoming packets > (scatter) to full cache line such that the last upstream write > generated by the incoming packet will be a full cache line. Any why would this be a user controller option? Isn't this something that the kernel should set up automatically instead of needing arcane tribal knowledge in the ULPs and applications? -- 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