Return-Path: Received: from mail-wg0-f49.google.com ([74.125.82.49]:34755 "EHLO mail-wg0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751899AbbGLObH (ORCPT ); Sun, 12 Jul 2015 10:31:07 -0400 Received: by wgkl9 with SMTP id l9so8729011wgk.1 for ; Sun, 12 Jul 2015 07:31:06 -0700 (PDT) Subject: Re: [PATCH v1 02/12] xprtrdma: Raise maximum payload size to one megabyte To: Chuck Lever , linux-rdma@vger.kernel.org, linux-nfs@vger.kernel.org References: <20150709203242.26247.4848.stgit@manet.1015granger.net> <20150709204159.26247.44592.stgit@manet.1015granger.net> From: Sagi Grimberg Message-ID: <55A27A26.4030306@dev.mellanox.co.il> Date: Sun, 12 Jul 2015 17:31:02 +0300 MIME-Version: 1.0 In-Reply-To: <20150709204159.26247.44592.stgit@manet.1015granger.net> Content-Type: text/plain; charset=utf-8; format=flowed Sender: linux-nfs-owner@vger.kernel.org List-ID: On 7/9/2015 11:41 PM, Chuck Lever wrote: > The point of larger rsize and wsize is to reduce the per-byte cost > of memory registration and deregistration. Modern HCAs can typically > handle a megabyte or more with a single registration operation. Reviewed-By: Sagi Grimberg