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=-0.3 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 B50DAC433DF for ; Tue, 9 Jun 2020 17:07:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 89C6020734 for ; Tue, 9 Jun 2020 17:07:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="CBNlTVpy" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731401AbgFIRHM (ORCPT ); Tue, 9 Jun 2020 13:07:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34762 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728107AbgFIRHM (ORCPT ); Tue, 9 Jun 2020 13:07:12 -0400 Received: from mail-wr1-x444.google.com (mail-wr1-x444.google.com [IPv6:2a00:1450:4864:20::444]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9FF4DC05BD1E; Tue, 9 Jun 2020 10:07:11 -0700 (PDT) Received: by mail-wr1-x444.google.com with SMTP id j10so22166477wrw.8; Tue, 09 Jun 2020 10:07:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:user-agent:in-reply-to:references:mime-version :content-transfer-encoding:subject:to:cc:from:message-id; bh=FFaxvaEcnrm6UjOkHIPoKrcymTAUzbkHGefbPj9c1Mc=; b=CBNlTVpy+nciQRlGVV4ObjppOr3AeMjkZzzIoO0NiqJltrhuNP3PvhXeI0Xq5HholE UWGSMSh1pmJz3HmdWHJo7uF81GE61w47TGquWLVEF4YgLYWbxaiVto2zCfUsbYiCqC7Y KJptq5Qctuno0EBJMuTSgD48MWKilFeg1tznFkMPLhVjOj+9zFK53C+btAG+xdvnq87T sVyl2rOvaQ0cGjv3QG3xqBXUPIjW+8rWZWsAnz03zeyODEYmonyxraG+qNv1mjEC8hsI mb5bwTzVaLfUydsh0tfcpaJzpg720HmN1kjp5bvXfujRe9l+PT/WvHXN7oN28VcXqASp NbDw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:user-agent:in-reply-to:references :mime-version:content-transfer-encoding:subject:to:cc:from :message-id; bh=FFaxvaEcnrm6UjOkHIPoKrcymTAUzbkHGefbPj9c1Mc=; b=J4uVkD/LtnlHkgYfZSl6FM6COqoxVBBDuUrXLnQ1hNzgIRAYy7XOu5twNSJrGDUQrH sWZ0YLD2dwl0ihiUxz3poAUy8cPrCoLN2eWRCb3Sh8qRsioQBxvaTjRY2MD6g+eq1j9E vrsivBu4FxsbBzuyIcxGj36nCUODUVnXrDIKEsfYtdoJCqOT57KEPgdpKaGqSaQFejDh L5/DIUiPSSF6f18gmXt29rZ79Dh/+NH8Tc8mRgHxbhoy/4dPJf0EHBq9sdQa/qpLOsmY UqNvmnnAgHCeF3YkpDBq+8rHj9L95ueDiVNR6BpI+oX3YGtym3uQRDaggYvhBDZ4LxlV ulUw== X-Gm-Message-State: AOAM5308u+d2kh16SeMLEONiRAayoHN9M3CNtbUVjy479XJafQirHoUH ubiGzkWdz/FMf0KcItSpCqA= X-Google-Smtp-Source: ABdhPJx5FmsR6jieGQu1bscU8ucZ7dIkb4GYGXmSTogxEmmSNi/HgJPUVB0mpMg2BICT8oo5EUSO1g== X-Received: by 2002:adf:e2ce:: with SMTP id d14mr5590827wrj.415.1591722430308; Tue, 09 Jun 2020 10:07:10 -0700 (PDT) Received: from [192.168.68.104] ([89.237.74.3]) by smtp.gmail.com with ESMTPSA id y5sm4354958wrs.63.2020.06.09.10.07.09 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 09 Jun 2020 10:07:09 -0700 (PDT) Date: Tue, 09 Jun 2020 20:07:06 +0300 User-Agent: K-9 Mail for Android In-Reply-To: <20200609164213.bshzpfuqgioyvtpm@linutronix.de> References: <6d4c92b28c54d8ca687c29043562de943a373547.1587675252.git.zanussi@kernel.org> <20200609154741.5kesuvl7txz4s3yu@linutronix.de> <20200609163446.efp76qbjzkbtl7nk@linutronix.de> <34E6C220-A85B-4296-AB8E-62DE6D9DC561@gmail.com> <20200609164213.bshzpfuqgioyvtpm@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [PATCH RT 1/2] tasklet: Address a race resulting in double-enqueue To: Sebastian Andrzej Siewior CC: Tom Zanussi , LKML , linux-rt-users , Steven Rostedt , Thomas Gleixner , Carsten Emde , John Kacur , Daniel Wagner , Clark Williams , Zhang Xiao From: Ramon Fried Message-ID: <61D63A44-E3D9-4E7F-BE08-B887C078F445@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On June 9, 2020 7:42:13 PM GMT+03:00, Sebastian Andrzej Siewior wrote: >On 2020-06-09 19:40:03 [+0300], Ramon Fried wrote: >> Correction=2E normal kernel is running with RT enabled, crash kernel >without=2E=20 > >no RT and no SMP in your crash kernel? So this information in your >first >email would have saved me some time=E2=80=A6 Indeed I'm truly sorry, I thought our crash kernel is configured as RT as well= =2E=20 so, as I understand, if I build the RT kernel without preempt enabled I ca= n hit this bug?=20 > >Sebastian --=20 Sent from my Android device with K-9 Mail=2E Please excuse my brevity=2E