From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757207Ab0EKSzg (ORCPT ); Tue, 11 May 2010 14:55:36 -0400 Received: from mga01.intel.com ([192.55.52.88]:7130 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755952Ab0EKSzd (ORCPT ); Tue, 11 May 2010 14:55:33 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.53,209,1272870000"; d="scan'208";a="797495148" From: Dan Williams Subject: [PATCH 0/2] ioatdma: ring buffer management updates To: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, netdev@vger.kernel.org Date: Tue, 11 May 2010 11:51:30 -0700 Message-ID: <20100511184949.6139.96826.stgit@localhost.localdomain> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Two patches targeted at the next merge window affecting the ioatdma driver (used when NET_DMA and/or ASYNC_TX_DMA+MD_RAID456 are enabled). According to perf the split locking update improves cpu utilization by a few percentage points. --- Dan Williams (2): ioat2,3: convert to producer/consumer locking ioat: convert to circ_buf drivers/dma/ioat/dma.h | 1 drivers/dma/ioat/dma_v2.c | 184 +++++++++++++++++++++++---------------------- drivers/dma/ioat/dma_v2.h | 33 +++----- drivers/dma/ioat/dma_v3.c | 117 +++++++++-------------------- 4 files changed, 142 insertions(+), 193 deletions(-)