From mboxrd@z Thu Jan 1 00:00:00 1970 From: Asias He Subject: [PATCH V5 0/4] Improve virtio-blk performance Date: Thu, 2 Aug 2012 14:25:52 +0800 Message-ID: <1343888757-25723-1-git-send-email-asias@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: linux-kernel@vger.kernel.org Cc: Jens Axboe , kvm@vger.kernel.org, "Michael S. Tsirkin" , virtualization@lists.linux-foundation.org, Tejun Heo , Shaohua Li , Christoph Hellwig List-Id: virtualization@lists.linuxfoundation.org Hi folks, This version added REQ_FLUSH and REQ_FUA support as suggested by Christoph and rebased against latest linus's tree. Jens, could you please consider picking up the dependencies 1/4 and 2/4 in your tree. Thanks! This patchset implements bio-based IO path for virito-blk to improve performance. Fio test shows bio-based IO path gives the following performance improvement: 1) Ramdisk device With bio-based IO path, sequential read/write, random read/write IOPS boost : 28%, 24%, 21%, 16% Latency improvement: 32%, 17%, 21%, 16% 2) Fusion IO device With bio-based IO path, sequential read/write, random read/write IOPS boost : 11%, 11%, 13%, 10% Latency improvement: 10%, 10%, 12%, 10% Asias He (4): block: Introduce __blk_segment_map_sg() helper block: Add blk_bio_map_sg() helper virtio-blk: Add bio-based IO path for virtio-blk virtio-blk: Add REQ_FLUSH and REQ_FUA support to bio path block/blk-merge.c | 117 +++++++++++++------ drivers/block/virtio_blk.c | 279 ++++++++++++++++++++++++++++++++++++++------- include/linux/blkdev.h | 2 + 3 files changed, 324 insertions(+), 74 deletions(-) -- 1.7.11.2