Received: by 2002:a05:6a10:22f:0:0:0:0 with SMTP id 15csp1172480pxk; Fri, 25 Sep 2020 08:01:39 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyP+Oj5P9LKbZYnRsaF3fJLMAQTsTw4wO5CaH00+RRBsOSyCqsjXTuMiBh/w7c3qRWl0GKz X-Received: by 2002:a17:906:6ce:: with SMTP id v14mr3026330ejb.451.1601046099142; Fri, 25 Sep 2020 08:01:39 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1601046099; cv=none; d=google.com; s=arc-20160816; b=MRwHLgXuvedj7gahWTkMDYSQI+TWHO4vhiLvWJNl8KocnYWhcwZAyIiP7Pqm3JvQ0i 4H7E9DRlleHcc/42PJ4ljJd+DdI+t5R9T+0zVApxfBJE7i4GJd4i+Mz+7K7C3i16jnI2 uZxvi7y5TVqS0VBDrCvxLyqQFCEPd7LBV+zTqTyMFWA3YjXXhGwqMYTgpc/F8PM/sF/C A8/jqGe/W72Nl6RECBAXHGzNo6shXCttJdTWrW181/R7XtgWei6X/tkwk3SkKgEQosUA U9K7+Zp5S5GwEqZ2rjakD0LJLAMFTVgFgpgnt8E89tDF7Pwc9oEJ5RmoVQ1uRY6O1U3a M5EA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:subject:cc:to:from:date; bh=bxWcEmBeAR0lgNtqWg3JXc6VKjpAIz10hEBZ9Upsrd8=; b=BrG3KPbHkbKLbdRmfL6Zp+zmc6ByMwxNL9fyf9JxZVHQxR99vph6BFYuqZmN54hV0+ Vje1ubTzp/0og4mwgf0X/Q4774XN/CDKgWFypYG5c9Iwaj/Sd3i/q/VJP63zzs3mKAUq CfCvRmJB+6N/RLBT1Tg8cHDKwg+ztz6M9bkH4peXgpGHFVG2NZr3m03fcw1TCoFZZrDB yXlCZhQqIYwlrQAMqhMydrHO/SbbLssSumqjeiHOuBKAl10cjgC82vDqZLtC1OtyGJMr CwHevGiYXRzm3JByzUmY4NhmhR63i+kqPJ1xtbpW7ICEicACW8KWhxEFerj7WS9GEKG2 euHA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id d2si2203904ejm.716.2020.09.25.08.01.14; Fri, 25 Sep 2020 08:01:39 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729274AbgIYO71 (ORCPT + 99 others); Fri, 25 Sep 2020 10:59:27 -0400 Received: from mail.kernel.org ([198.145.29.99]:42246 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728731AbgIYO7S (ORCPT ); Fri, 25 Sep 2020 10:59:18 -0400 Received: from oasis.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5648C20715; Fri, 25 Sep 2020 14:59:16 +0000 (UTC) Date: Fri, 25 Sep 2020 10:59:14 -0400 From: Steven Rostedt To: Naresh Kamboju Cc: Greg Kroah-Hartman , Joel Fernandes , Peter Zijlstra , Namhyung Kim , LKML , linux- stable , Sasha Levin , Masami Hiramatsu , LTP List , lkft-triage@lists.linaro.org Subject: Re: [stable 4.19] [PANIC]: tracing: Centralize preemptirq tracepoints and unify their usage Message-ID: <20200925105914.7de88d27@oasis.local.home> In-Reply-To: <20200925105458.567d0bf4@oasis.local.home> References: <20180823023839.GA13343@shao2-debian> <20180828195347.GA228832@joelaf.mtv.corp.google.com> <20200925051518.GA605188@kroah.com> <20200925105458.567d0bf4@oasis.local.home> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 25 Sep 2020 10:54:58 -0400 Steven Rostedt wrote: > The crash looks like its cr3 related, which I believe Peter Zijlstra s/cr3/cr2/ -- Steve > did a restructuring of that code to not let it be an issue anymore. > I'll have to look deeper. The rework may be too intrusive to backport, > but we do have other work arounds for this issue if that would be > acceptable for backporting. >