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 23670CDB474 for ; Tue, 17 Oct 2023 21:23:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344123AbjJQVXm (ORCPT ); Tue, 17 Oct 2023 17:23:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32956 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344026AbjJQVXc (ORCPT ); Tue, 17 Oct 2023 17:23:32 -0400 Received: from mail-oa1-x29.google.com (mail-oa1-x29.google.com [IPv6:2001:4860:4864:20::29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 63337C4; Tue, 17 Oct 2023 14:23:31 -0700 (PDT) Received: by mail-oa1-x29.google.com with SMTP id 586e51a60fabf-1dcfb21f9d9so3791236fac.0; Tue, 17 Oct 2023 14:23:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1697577810; x=1698182610; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=fq+KvJbYkwgRFoRKWvtxgAKVht/e5ta3QaOcVsPqWm8=; b=JHoghUUOsnMX6Zm4QzYGsKeg/sdAfRV/xR6JKRJVAM6yTlO9AbvZIm80gPAXa4CD4X EyLH4Lonz+n/XCrJVy69zYhOp3Lh6idzZoznoKTISN7O7Lfp/HQZNrwCckobycD+TYLi n/QsC1/LivEkOErG9dZHUE7aOGt9CknA10C54yKv/JF3Y6khBAqyjRwtd9hUkvPOf2zk BcAL+JdDJEQCmvpNQjzGZdGTuT9wPYmoF4Qqrmh2O9e0Ty4YjHea8kETCacAeq0XASsi BIOMqclVcUWaeeBNeQG/lloSv3Z2QtSkYMk7CFh7rRbZpt9wMbDYPG6qY9LTBwsqKXpr ZjnQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697577810; x=1698182610; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=fq+KvJbYkwgRFoRKWvtxgAKVht/e5ta3QaOcVsPqWm8=; b=GYiXBanQPAD664LA4eDtfCTsQKqrjAWteT52h7AbG4qE1mqJ/1xi1cEUyC+YlGjqni qx8LhZYz3PnRUjeaiAHZObjst9ojMrV179a+nTl1NIJbX0rwmMvw/vKxnX0/6HVHlwER RO4KNqmW124FiFmrOxBcO06+R6x3TpN0Si3jbKw3OGOdf6KlhXuRN+9aS+yaDax7+NRl +MLwob/lcOnw/leHTuAbq7W/vhSl8avkXxm86MJHDHJswYevyBCvXtB9ArWreoAEkXDu M/b0EIg1o7TqYr71BktueNxMF9N1gTgSTJipIXR7dHqCERtqUstgmFj6clbexAvZnL2r T7Lw== X-Gm-Message-State: AOJu0Yx2cgTLHAu7P5K5HN8VPsfPmniHt5bel1baCER5zLuZvIYa1NYD 5A/Zaw1tijgZi6WlVMtPO6U= X-Google-Smtp-Source: AGHT+IEKi3AEwdBGrJ0jVFErrADz7areQwR5fvAOyp0/VBfPLkFJZ3I7tej+115l4OwPeFrXbyBTIA== X-Received: by 2002:a05:6870:a40c:b0:1d5:b2ba:bc93 with SMTP id m12-20020a056870a40c00b001d5b2babc93mr4070080oal.13.1697577810707; Tue, 17 Oct 2023 14:23:30 -0700 (PDT) Received: from ?IPV6:2603:8081:1405:679b:1392:8eda:4bf:b7e5? (2603-8081-1405-679b-1392-8eda-04bf-b7e5.res6.spectrum.com. [2603:8081:1405:679b:1392:8eda:4bf:b7e5]) by smtp.gmail.com with ESMTPSA id eb42-20020a056870a8aa00b001e9c2edd8b7sm413469oab.17.2023.10.17.14.23.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 17 Oct 2023 14:23:30 -0700 (PDT) Message-ID: <5c6e69b3-f83b-461d-a08a-37bfbd82f995@gmail.com> Date: Tue, 17 Oct 2023 16:23:29 -0500 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [bug report] blktests srp/002 hang Content-Language: en-US To: Bart Van Assche , Jason Gunthorpe Cc: "Daisuke Matsuda (Fujitsu)" , 'Rain River' , Zhu Yanjun , "leon@kernel.org" , Shinichiro Kawasaki , RDMA mailing list , "linux-scsi@vger.kernel.org" References: <8aff9124-85c0-8e3b-dc35-1017b1540037@gmail.com> <3c84da83-cdbb-3326-b3f0-b2dee5f014e0@linux.dev> <4e7aac82-f006-aaa7-6769-d1c9691a0cec@gmail.com> <29c5de53-cc61-4efc-8e8d-690e27756a16@acm.org> <20231017175821.GG282036@ziepe.ca> <8801fc68-0e8e-4bb1-acaa-597bf72a567d@gmail.com> <20231017185139.GA691768@ziepe.ca> <08a8d947-25b5-434c-9ba3-282d298b5bfd@acm.org> <02cd10fd-fd4a-4ad7-9b1d-6d37b070aacf@acm.org> From: Bob Pearson In-Reply-To: <02cd10fd-fd4a-4ad7-9b1d-6d37b070aacf@acm.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org On 10/17/23 16:18, Bart Van Assche wrote: > > On 10/17/23 14:14, Bob Pearson wrote: >> All the active threads are just the same and are all waiting for >> an io to complete from scsi. No threads are active in rxe, srp(t) >> or scsi. All activity appears to be dead. > > Is this really a clue? I have seen such backtraces many times. All > such a backtrace tells us is that something got stuck in a layer > under the filesystem. It does not tell us which layer caused > command processing to get stuck. > > Bart. > Not really, but stuck could mean it died (no threads active) or it is in a loop or waiting to be scheduled. It looks dead. The lower layers are waiting to get kicked into action by some event but it hasn't happened. This is conjecture on my part though. Bob