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=-3.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,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 494DFC2D0A3 for ; Thu, 12 Nov 2020 07:55:57 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BC17321D40 for ; Thu, 12 Nov 2020 07:55:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="c5naR9gx"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="f+3jaLK7" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BC17321D40 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=4SaDDaE3v1ZQmXsh6QtM+MZtqSbcN/PR/59iQ+qNOFI=; b=c5naR9gxQDx3QdDwOUb9V8abUd 51xStq6S2lSxUvFSz2uoyASpX3pf15o+gHjDnGMW+XMSaz7W5E4m7QdY6y2VC4O2RSeozSu/Tsxi5 +z+jw8yknZZC2oMKMQZ6F1xnlqfO2bLqLkJ1QeZkUOK/YyWMt1/uBvrGYFmzHSOAEMpwa6V7fvQHM 16dUkP4wCa33mhpVhTuwpyO+UPt1O12ZnEf8cwi/4zqijTtNJ2uQJtdr8x4UIYi0Lk7tg8UPOvUSQ /QZWpT7NyKjBqTZfnUOo4RMQdo2nABLs29pHGHKh2cYmOj9qE51M+40qTuiQOsf2ZRdCgs3X2Jnu5 eJZxh8BQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kd7SQ-0007Yk-Or; Thu, 12 Nov 2020 07:55:50 +0000 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kd7SL-0007XF-Bd for linux-nvme@lists.infradead.org; Thu, 12 Nov 2020 07:55:46 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1605167743; 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=6bz/KsOzR5wf+7A3G0krlSSNDvuKL7/IXddr5pTa7h0=; b=f+3jaLK7tBQSsAFEejkHblBwoRL8cT2AQLn7gW0dU8GfFa60GgreHA1zSkj/9iHJg2OTVn igPoR99tJ3RIg/lJpcVaEgBtXVmOKtdQDt3zL/mmXFSf8YlTMNsupQU8yAsMsSEmZAE1M6 ccLq+678TM0UgAQ6ViA2VWQdfO6qyGU= 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-332-jjHKepSSNHeZXwrszJvw7A-1; Thu, 12 Nov 2020 02:55:41 -0500 X-MC-Unique: jjHKepSSNHeZXwrszJvw7A-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id B9E168018AB; Thu, 12 Nov 2020 07:55:38 +0000 (UTC) Received: from localhost (ovpn-12-132.pek2.redhat.com [10.72.12.132]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8BEDA2CFBB; Thu, 12 Nov 2020 07:55:36 +0000 (UTC) From: Ming Lei To: Jens Axboe , linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, Christoph Hellwig Subject: [PATCH 0/3] blk-mq/nvme-loop: use nvme-loop's lock class for addressing lockdep false positive warning Date: Thu, 12 Nov 2020 15:55:23 +0800 Message-Id: <20201112075526.947079-1-ming.lei@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201112_025545_466117_37445B09 X-CRM114-Status: GOOD ( 10.79 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Bart Van Assche , Qian Cai , John Garry , Kashyap Desai , Sumit Saxena , Hannes Reinecke , Ming Lei Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org Hi, Qian reported there is hang during booting when shared host tagset is introduced on megaraid sas. Sumit reported the whole SCSI probe takes about ~45min in his test. Turns out it is caused by nr_hw_queues increased, especially commit b3c6a5997541("block: Fix a lockdep complaint triggered by request queue flushing") adds synchronize_rcu() for each hctx's release handler. Address the original lockdep false positive warning by simpler way, then long scsi probe can be avoided with lockdep enabled. Ming Lei (3): blk-mq: add new API of blk_mq_hctx_set_fq_lock_class nvme-loop: use blk_mq_hctx_set_fq_lock_class to set loop's lock class Revert "block: Fix a lockdep complaint triggered by request queue flushing" block/blk-flush.c | 30 +++++++++++++++++++++++++----- block/blk.h | 1 - drivers/nvme/target/loop.c | 10 ++++++++++ include/linux/blk-mq.h | 3 +++ 4 files changed, 38 insertions(+), 6 deletions(-) Cc: Qian Cai Cc: Sumit Saxena Cc: John Garry Cc: Kashyap Desai Cc: Bart Van Assche Cc: Hannes Reinecke -- 2.25.4 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme