From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com ([209.132.183.28]:39398 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S938067AbdD1PQS (ORCPT ); Fri, 28 Apr 2017 11:16:18 -0400 From: Ming Lei To: Jens Axboe , linux-block@vger.kernel.org Cc: Christoph Hellwig , Omar Sandoval , Ming Lei Subject: [PATCH 0/4] blk-mq: support to use hw tag for scheduling Date: Fri, 28 Apr 2017 23:15:35 +0800 Message-Id: <20170428151539.25514-1-ming.lei@redhat.com> Sender: linux-block-owner@vger.kernel.org List-Id: linux-block@vger.kernel.org Hi, This patchset introduces flag of BLK_MQ_F_SCHED_USE_HW_TAG and allows to use hardware tag directly for IO scheduling if the queue's depth is big enough. In this way, we can avoid to allocate extra tags and request pool for IO schedule, and the schedule tag allocation/release can be saved in I/O submit path. Thanks, Ming Ming Lei (4): blk-mq: introduce BLK_MQ_F_SCHED_USE_HW_TAG blk-mq: introduce blk_mq_get_queue_depth() blk-mq: use hw tag for scheduling if hw tag space is big enough blk-mq: dump new introduced flag of BLK_MQ_F_SCHED_USE_HW_TAG block/blk-mq-debugfs.c | 1 + block/blk-mq-sched.c | 18 +++++++++++++- block/blk-mq-sched.h | 15 ++++++++++++ block/blk-mq.c | 65 ++++++++++++++++++++++++++++++++++++++++++++------ block/blk-mq.h | 1 + include/linux/blk-mq.h | 1 + 6 files changed, 93 insertions(+), 8 deletions(-) -- 2.9.3