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=-3.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 8DF98C4361B for ; Sun, 20 Dec 2020 20:08:25 +0000 (UTC) Received: from shelob.surriel.com (shelob.surriel.com [96.67.55.147]) (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 D5C7123104 for ; Sun, 20 Dec 2020 20:08:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D5C7123104 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=vt.edu Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernelnewbies-bounces@kernelnewbies.org Received: from localhost ([::1] helo=shelob.surriel.com) by shelob.surriel.com with esmtp (Exim 4.94) (envelope-from ) id 1kr4zq-0005xZ-2I; Sun, 20 Dec 2020 15:08:02 -0500 Received: from mail-qt1-x82a.google.com ([2607:f8b0:4864:20::82a]) by shelob.surriel.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94) (envelope-from ) id 1kr4zn-0005x9-Vr for kernelnewbies@kernelnewbies.org; Sun, 20 Dec 2020 15:08:00 -0500 Received: by mail-qt1-x82a.google.com with SMTP id u21so5313664qtw.11 for ; Sun, 20 Dec 2020 12:07:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=vt-edu.20150623.gappssmtp.com; s=20150623; h=sender:from:to:cc:subject:in-reply-to:references:mime-version :content-transfer-encoding:date:message-id; bh=tO6vCE+bhOevZ7uwrr7JzyuT4gUPoOkLQFNe+WEygIY=; b=KG6a88RMet1hHs0UjfdTHtrfTh+nWPva1T0xCv4fi+ffxZjmg1NGtZD+xeKsd8BMQZ mbpOgtUGdmSe5jMWutq//AEgwcg9fWAwwbir3Y1JlfpOq6ncRNlB0JTTA/lkiGxeL2iv SLyzNcHipvEbynW6XJEcZaddQcE9gph5xghaTHHGt84af3T+XcbqAYSswUJIC1oYVRqT xUrdh3qg3JP1Yd46V6k3OlycfB5yOgs1wF2zIoqs/oBE/piGhupO2N3Adl8mj45XEoiP 1XlPXJca+FoI04CdMEKlRT9Pu6prwvSHLRgN68t/mnNiXyKCVzomw18b2XlzMtCOAc84 ilXw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:in-reply-to:references :mime-version:content-transfer-encoding:date:message-id; bh=tO6vCE+bhOevZ7uwrr7JzyuT4gUPoOkLQFNe+WEygIY=; b=apHiHdV4tz2//QvQ2RDIYQo5bH+BnRxja08+URWFNmVw/d0zA1LgAMq386802irrCN FEdE/MIAO1y/udRwnmTAbsqJdwKao6nVvHIdHRJMNAz6AqcdQ9sVywsT5txt3gVhxA5v b4TkUzEdKuRamn6/bbTOwXwRNa80XMsuZ3qkd7Yi0UoDMY6ElwjyFHPPtmNb8iE54G8D tX1C+VrWxO3C3ijRt/PrkG/Ba5P0I0Sw0Y6RHsJa/3CIxo9tDTqKFPAmEBsynCuvahV6 am5OQPS7sCAc7rBg/QIzv3kvuixwhp919z8Py3SfScmb08FD8qclKXpQMQ1/f0NCIwxo VhPA== X-Gm-Message-State: AOAM533gKBYisvfh0UKpqP4hopOTwwi8CokzOdKzpn1kaSPQPkdqMGog GHU/JizYEx+hrIToFc2n1xYR2w== X-Google-Smtp-Source: ABdhPJzLcseM0Uc3S760EnjGreCQ1aJoL+Rw9wxJmdu/hwBX9IntTlUVSLCPD8tkvVKgCpkUZWOQ1g== X-Received: by 2002:a05:622a:255:: with SMTP id c21mr13881222qtx.223.1608494817293; Sun, 20 Dec 2020 12:06:57 -0800 (PST) Received: from turing-police ([2601:5c0:c380:d61::359]) by smtp.gmail.com with ESMTPSA id w8sm10057456qts.50.2020.12.20.12.06.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 20 Dec 2020 12:06:53 -0800 (PST) From: "Valdis Kl=?utf-8?Q?=c4=93?=tnieks" X-Google-Original-From: "Valdis Kl=?utf-8?Q?=c4=93?=tnieks" X-Mailer: exmh version 2.9.0 11/07/2018 with nmh-1.7+dev To: John Wood Subject: Re: [PATCH 0/4] Help to debug spinlocks In-Reply-To: <20201220114708.GA11045@ubuntu> References: <20201219114640.63024-1-john.wood@gmx.com> <20201220114708.GA11045@ubuntu> Mime-Version: 1.0 Date: Sun, 20 Dec 2020 15:06:52 -0500 Message-ID: <7064.1608494812@turing-police> Cc: kernelnewbies@kernelnewbies.org X-BeenThere: kernelnewbies@kernelnewbies.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Learn about the Linux kernel List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============5834474456152272479==" Errors-To: kernelnewbies-bounces@kernelnewbies.org --===============5834474456152272479== Content-Type: multipart/signed; boundary="==_Exmh_1608494812_2362P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit --==_Exmh_1608494812_2362P Content-Type: text/plain; charset=us-ascii On Sun, 20 Dec 2020 12:47:08 +0100, John Wood said: > disable interrupts. Then, the task_free hook was call from an IRQ context > and tried to acquire the same lock in a write state. OK, I'll bite. Why was task_free called from an IRQ context in the first place? That sounds awfully fishy..... --==_Exmh_1608494812_2362P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Comment: Exmh version 2.9.0 11/07/2018 iQIVAwUBX9+u3AdmEQWDXROgAQJXQBAAnxPIkQyxk2EJJTX5cfkI6gGweetGKVxd L4oMPDaoDOuFldz0vMTQWEjrPVyPbt4iBUdigmttGQMMwRueR11zCvW4NGobAJl7 Ji9da57G6YOt/+gyB0a4C6wbcPgz879Qq53kzXzP+fn9bgfv40Md5iTPvYebdsAs +qXCge0NKYQoXVGJG04NHBV7ZNLScBrqEsUcOUsXJqLoxnQPh7Y4UJdm6cmh9Alx NWWOpwwKxKFq282AZ1u0Mx0+AvbektLRpW8yB0QndXk8ngZw+PiTL0IkIeKRn+wc s6cQWHX/scQ2eDvkzIVHlok/1s5UysuSlO12M3Vi7m8P+fSpSEsr+869lKJu+Kd/ gcxJ24Ah1Tp22DOLon0z2akb4X9LJ5L2W6hCyh6QC7RKRTvu+1+X7/WEOFgIht02 lCrt96Ru3ygPh39nbq5+nEX5rXPbwjPrYoOsMkVN6NftlAd9LfKpNbtm+XkGEzph Ek8sJ67ftegaMCAMH+nOu1lwY6JgygPS4kaXXY+vYvunY6JOetX/m6qCq7y9gfZm COMbDLsIUc9lRZM44f6pGiPmT9CE5jN2XWQ0DMckqN1CGt9A7LCdi5aAzCGJBbdt qb9KR3O8qZL+GSLraR6pHIk6rEGbJmhKgJHHf+O+O9nh1U7KjdNJ8Ai3NY4g4beY lNlXP/zb9UI= =hc2H -----END PGP SIGNATURE----- --==_Exmh_1608494812_2362P-- --===============5834474456152272479== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies --===============5834474456152272479==--