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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6AD73C433FE for ; Tue, 8 Nov 2022 16:51:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234340AbiKHQvh (ORCPT ); Tue, 8 Nov 2022 11:51:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37864 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233816AbiKHQvg (ORCPT ); Tue, 8 Nov 2022 11:51:36 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9487157B5A for ; Tue, 8 Nov 2022 08:51:35 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 2EC87616A8 for ; Tue, 8 Nov 2022 16:51:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0C4CCC433C1; Tue, 8 Nov 2022 16:51:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1667926294; bh=APtEjyH5Uack2UlY2blKatc3e2SEGTBkQlXBZhgLgdY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=fFNRGEXktsRgRKW7p+I5y/E+TxHHTTEaKtritc0XZpTq/Rcs4PdFb1zX//7H84Ey+ Tf6cKTBr5oC3eL2uhuTwCYdzJ1XfwupQGDo7iC9BlKVesekdBK+XhkfAuA39x3Ozzu Rj4qHwkuEFqZ0ifDHb/T9wjKqJxV2BM3zayHDnurCqP4O9dKxnyOKf5hPy3kTWUnC1 JUDNE9ywMENTyiz6FkI220QNWrU317LO0lggox4F0eTK2IeplRGcb55tkQn3/zY8FG ZhSaNB6kFkEUFgR6OiL/BO48vvp5tLekmSlGivNFx9Hov2/MRovRloVCnP1Ty5V+7j GQ2B5yhTMkEVQ== Date: Tue, 8 Nov 2022 09:51:31 -0700 From: Keith Busch To: Francesco Ruggeri Cc: linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, sagi@grimberg.me, hch@lst.de, axboe@fb.com Subject: Re: nvme: hung task in blk_mq_freeze_queue_wait Message-ID: References: <20221108025602.E48005EC04F9@us226.sjc.aristanetworks.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221108025602.E48005EC04F9@us226.sjc.aristanetworks.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Nov 07, 2022 at 06:56:02PM -0800, Francesco Ruggeri wrote: > [ 4390.119745] INFO: task kworker/u80:2:8279 blocked for more than 300 seconds. > [ 4390.471456] Tainted: P O 4.19.142.Ar-29007847.buytenhb7335070 #1 That is an old kernel, I think it'd be worth trying something newer to confirm if this observation isn't already fixed. Specifically, it looks like you have multiple namespaces timing out IO near simultaneously, and causing a mismatched handling. That kind of thing was fixed after the follow (plus some prior dependencies): commit d6135c3a1ec0cddda7b8b8e1b5b4abeeafd98289 Author: Keith Busch Date: Tue May 14 14:46:09 2019 -0600 nvme-pci: Sync queues on reset