From mboxrd@z Thu Jan 1 00:00:00 1970 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=-5.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 AC8BDC433E2 for ; Mon, 14 Sep 2020 02:08:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6B3C021897 for ; Mon, 14 Sep 2020 02:08:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="NCTwfvFi" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725982AbgINCIy (ORCPT ); Sun, 13 Sep 2020 22:08:54 -0400 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:54162 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725965AbgINCIw (ORCPT ); Sun, 13 Sep 2020 22:08:52 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600049329; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=NtOlulbKFTK9JonRL8oELSnBW6UyODni1m5uQCkqvZI=; b=NCTwfvFikK0r3ZP1hIWwwG7mIhTvv2FncN5RXEGYYQQltwj/syHemmQxLNmOt8CMvBAjfS lALvfdFXNWS66H04RvG+H6MLkAArHRmeDvtrh1yrfuaab47/qWRhbenlgMykqtbXRVB8fJ gMltUaKHfoSV213EUhL802I7UnTU5QQ= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-211-wIIG7ZKuNYuf8Y72qMCxNg-1; Sun, 13 Sep 2020 22:08:45 -0400 X-MC-Unique: wIIG7ZKuNYuf8Y72qMCxNg-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C3B721005E62; Mon, 14 Sep 2020 02:08:42 +0000 (UTC) Received: from localhost (ovpn-12-38.pek2.redhat.com [10.72.12.38]) by smtp.corp.redhat.com (Postfix) with ESMTP id 61F5560CD0; Mon, 14 Sep 2020 02:08:37 +0000 (UTC) From: Ming Lei To: Jens Axboe , linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, Christoph Hellwig , Keith Busch Cc: Ming Lei , Hannes Reinecke , Sagi Grimberg , Bart Van Assche , Johannes Thumshirn , Chao Leng Subject: [PATCH V6 0/4] blk-mq: implement queue quiesce via percpu_ref for BLK_MQ_F_BLOCKING Date: Mon, 14 Sep 2020 10:08:23 +0800 Message-Id: <20200914020827.337615-1-ming.lei@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Hi Jens, The 1st patch add .mq_quiesce_mutex for serializing quiesce/unquiesce, and prepares for replacing srcu with percpu_ref. The 2nd patch replaces srcu with percpu_ref. The 3rd patch adds tagset quiesce interface. The 4th patch applies tagset quiesce interface for NVMe subsystem. V6: - base on for-5.10/block directly, instead of being against on patchset of 'percpu_ref & block: reduce memory footprint of percpu_ref in fast path', because these patches don't depend on that patchset. V5: - warn once in case that driver unquiesces its queue being quiesce and not done, only patch 2 is modified V4: - remove .mq_quiesce_mutex, and switch to test_and_[set|clear] for avoiding duplicated quiesce action - pass blktests(block, nvme) V3: - add tagset quiesce interface - apply tagset quiesce interface for NVMe - pass blktests(block, nvme) V2: - add .mq_quiesce_lock - add comment on patch 2 wrt. handling hctx_lock() failure - trivial patch style change Ming Lei (3): block: use test_and_{clear|test}_bit to set/clear QUEUE_FLAG_QUIESCED blk-mq: implement queue quiesce via percpu_ref for BLK_MQ_F_BLOCKING blk-mq: add tagset quiesce interface Sagi Grimberg (1): nvme: use blk_mq_[un]quiesce_tagset block/blk-core.c | 13 +++ block/blk-mq-sysfs.c | 2 - block/blk-mq.c | 182 +++++++++++++++++++++++++-------------- block/blk-sysfs.c | 6 +- block/blk.h | 2 + drivers/nvme/host/core.c | 19 ++-- include/linux/blk-mq.h | 10 +-- include/linux/blkdev.h | 4 + 8 files changed, 154 insertions(+), 84 deletions(-) Cc: Hannes Reinecke Cc: Sagi Grimberg Cc: Bart Van Assche Cc: Johannes Thumshirn Cc: Chao Leng -- 2.25.2