From patchwork Tue Oct 20 06:54:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jingbo Xu X-Patchwork-Id: 11845851 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 14D5FC433E7 for ; Tue, 20 Oct 2020 06:54:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BB6DC223BF for ; Tue, 20 Oct 2020 06:54:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404580AbgJTGyX (ORCPT ); Tue, 20 Oct 2020 02:54:23 -0400 Received: from out30-43.freemail.mail.aliyun.com ([115.124.30.43]:59924 "EHLO out30-43.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728831AbgJTGyX (ORCPT ); Tue, 20 Oct 2020 02:54:23 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R451e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e01424;MF=jefflexu@linux.alibaba.com;NM=1;PH=DS;RN=7;SR=0;TI=SMTPD_---0UCd5jTl_1603176860; Received: from localhost(mailfrom:jefflexu@linux.alibaba.com fp:SMTPD_---0UCd5jTl_1603176860) by smtp.aliyun-inc.com(127.0.0.1); Tue, 20 Oct 2020 14:54:21 +0800 From: Jeffle Xu To: snitzer@redhat.com, axboe@kernel.dk Cc: linux-block@vger.kernel.org, dm-devel@redhat.com, joseph.qi@linux.alibaba.com, xiaoguang.wang@linux.alibaba.com, haoxu@linux.alibaba.com Subject: [RFC 1/3] block/mq: add iterator for polling hw queues Date: Tue, 20 Oct 2020 14:54:18 +0800 Message-Id: <20201020065420.124885-2-jefflexu@linux.alibaba.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201020065420.124885-1-jefflexu@linux.alibaba.com> References: <20201020065420.124885-1-jefflexu@linux.alibaba.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Add one helper function for iterating all hardware queues in polling mode. Signed-off-by: Jeffle Xu --- include/linux/blk-mq.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index b23eeca4d677..81c70ce97715 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -571,6 +571,12 @@ static inline void *blk_mq_rq_to_pdu(struct request *rq) for ((i) = 0; (i) < (q)->nr_hw_queues && \ ({ hctx = (q)->queue_hw_ctx[i]; 1; }); (i)++) +#define queue_for_each_poll_hw_ctx(q, hctx, i) \ + for ((i) = 0; ((q)->tag_set->nr_maps > HCTX_TYPE_POLL) && \ + (i) < (q)->tag_set->map[HCTX_TYPE_POLL].nr_queues && \ + ({ hctx = (q)->queue_hw_ctx[((q)->tag_set->map[HCTX_TYPE_POLL].queue_offset + (i))]; 1; }); \ + (i)++) + #define hctx_for_each_ctx(hctx, ctx, i) \ for ((i) = 0; (i) < (hctx)->nr_ctx && \ ({ ctx = (hctx)->ctxs[(i)]; 1; }); (i)++)