From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Gunthorpe Subject: Re: [RFC rdma-core 2/2] verbs: Introduce non-contiguous memory registration Date: Mon, 29 Jan 2018 10:27:17 -0700 Message-ID: <20180129172717.GW23852@mellanox.com> References: <1515088046-26605-1-git-send-email-alexma@mellanox.com> <1515088046-26605-2-git-send-email-alexma@mellanox.com> <20180111122206.GB2800@yuvallap> <20180111164455.GA1309@ziepe.ca> <20180123202954.GA14007@yuvallap> <20180128203746.GA11635@yuvallap> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20180128203746.GA11635@yuvallap> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Yuval Shaia Cc: Alex Margolin , Marcel Apfelbaum , "linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" List-Id: linux-rdma@vger.kernel.org On Sun, Jan 28, 2018 at 10:37:47PM +0200, Yuval Shaia wrote: > But let's try to take it one step further, what if all my buffers are the > same size, of even better, all are PAGE_SIZE. So in case of "composite" > array of let's say 262144 elements i would have wasteful 262144 * 8 bytes. > > This problem could be solved with a bitmap to a given range where only the > bits that are set composed the MR. You want this for the host on virtualization right? Like we talked about at plumbers? Is it really necessary to be so optimal? A list of SGLs is not good enough? Jason -- 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