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=-9.0 required=3.0 tests=BAYES_00,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 1D409C43381 for ; Tue, 16 Mar 2021 17:47:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E9BF465128 for ; Tue, 16 Mar 2021 17:47:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239337AbhCPRrt (ORCPT ); Tue, 16 Mar 2021 13:47:49 -0400 Received: from mail-pj1-f54.google.com ([209.85.216.54]:56319 "EHLO mail-pj1-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239242AbhCPRqs (ORCPT ); Tue, 16 Mar 2021 13:46:48 -0400 Received: by mail-pj1-f54.google.com with SMTP id bt4so11028998pjb.5; Tue, 16 Mar 2021 10:46:48 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-disposition; bh=cDz1OoD3tDdvu9yZyAWDwJ6QedSgxN+Vxkt9EmQTDzc=; b=ZgA11HSZTxPkTPNEIF7Iwm468YzalhPu5PX3ys4YDWcVt0bVN+n8szofus4mJLc6Dz hjy4JSLnblDyKMP8NlbrR0LONq7t0yyaNO4hNYiNLZC1/i7T4uVER5PJHoxYPbTGYrqd OSDTmVc1ZY+odRiEDf7pN/IfkrobrUR/EVQlHcnt2nf8sFHOks+JpQrjJoXzF06FJVO8 xdrVDclvwIddxolsereTgxZ52RPTEfc7vSLh2mVKhsuYU97MI3S0rcXYQHmsdjgc5KQE rVQtBgWgYZafUGtSmda1d2Qux8McRrPNdz5pSQuk7po5EGH2Sr8a34Ho3fXfLQ/AgKQf ISgw== X-Gm-Message-State: AOAM533zUBewTS6z2gnFoOjIzn4iB4q0wIZTQuq+eIyytYAF7YmFZILu PfcjoGOmlrhy7PmqBMe5tBjXIWihO0Biyg== X-Google-Smtp-Source: ABdhPJwzP9XKjt2OANRgMC82UXqNJ/kn6lLddkdek0OKFvBOE6LikIdcIRjIGKw0bk+8oennH3ZpPA== X-Received: by 2002:a17:90a:e656:: with SMTP id ep22mr228107pjb.60.1615916807990; Tue, 16 Mar 2021 10:46:47 -0700 (PDT) Received: from 42.do-not-panic.com (42.do-not-panic.com. [157.230.128.187]) by smtp.gmail.com with ESMTPSA id q15sm79386pje.28.2021.03.16.10.46.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Mar 2021 10:46:47 -0700 (PDT) Received: by 42.do-not-panic.com (Postfix, from userid 1000) id 7E83B40244; Tue, 16 Mar 2021 17:46:45 +0000 (UTC) Date: Tue, 16 Mar 2021 17:46:45 +0000 From: Luis Chamberlain To: linux-block@vger.kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com Cc: Luis Chamberlain , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: blktests: block/009 next-20210304 failure rate average of 1/448 Message-ID: <20210316174645.GI4332@42.do-not-panic.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I've managed to reproduce blktests block/009 failures with kdevops [0] on linux-next tag next-20210304 with a current failure rate average of 1/448 (3 counted failures so far). I've documented the failure on korg#212305 [1] and provide instructions on how to reproduce. The failure happens on KVM virtualized guests, for the host OS I am using debian testing, but the target kernel is linux-next. My personal suspicion is not on the block layer but on scsi_debug because this can fail: modprobe scsi_debug; rmmod scsi_debug This second issue may be a secondary separate issue, but I figured I'd mention it. To fix this later issue I've looked at ways to make scsi_debug_init() wait until its scsi devices are probed, however its not clear how to do this correctly. If someone has an idea let me know. If that fixes this issue then we know it was that. [0] https://github.com/mcgrof/kdevops [1] https://bugzilla.kernel.org/show_bug.cgi?id=212305 Luis