From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Williams Subject: [PATCH 0/2] ioatdma: ring buffer management updates Date: Tue, 11 May 2010 11:51:30 -0700 Message-ID: <20100511184949.6139.96826.stgit@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit To: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, netdev@vger.kernel.org Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.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(-)