From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Moyer Subject: Re: [patch,v3,repost 00/10] make I/O path allocations more numa-friendly Date: Mon, 10 Dec 2012 12:59:30 -0500 Message-ID: References: <1354034799-8460-1-git-send-email-jmoyer@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: In-Reply-To: <1354034799-8460-1-git-send-email-jmoyer@redhat.com> (Jeff Moyer's message of "Tue, 27 Nov 2012 11:46:28 -0500") Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: linux-scsi@vger.kernel.org, JBottomley@parallels.com, Bart Van Assche List-Id: linux-scsi@vger.kernel.org Jeff Moyer writes: > Hi, > > This patch set makes memory allocations for data structures used in > the I/O path more numa friendly by allocating them from the same numa > node as the storage device. I've only converted a handful of drivers > at this point. My testing is limited by the hardware I have on hand. > Using these patches, I was able to max out the bandwidth of the storage > controller when issuing I/O from any node on my 4 node system. Without > the patch, I/O from nodes remote to the storage device would suffer a > penalty ranging from 6-12%. Given my relatively low-end setup[1], I > wouldn't be surprised if others could show a more significant performance > advantage. > > This is a repost of the last posting. The only changes are additional > reviewed-by/acked-by tags. I think this version is ready for inclusion. > James, would you mind taking a look? James? Do you have any objections to including this for 3.8? -Jeff