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 D396BEB64DA for ; Thu, 20 Jul 2023 10:40:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230394AbjGTKkg convert rfc822-to-8bit (ORCPT ); Thu, 20 Jul 2023 06:40:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44092 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229592AbjGTKkc (ORCPT ); Thu, 20 Jul 2023 06:40:32 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A775510F1 for ; Thu, 20 Jul 2023 03:40:31 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 36D46619D6 for ; Thu, 20 Jul 2023 10:40:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0A708C433C7; Thu, 20 Jul 2023 10:40:29 +0000 (UTC) Date: Thu, 20 Jul 2023 06:40:28 -0400 From: Steven Rostedt To: Tony Luck Cc: Aristeu Rozanski , linux-kernel@vger.kernel.org Subject: Re: rasdaemon broke between v6.0 and v6.3? Message-ID: <20230720064028.1aeb3c18@gandalf.local.home> In-Reply-To: References: X-Mailer: Claws Mail 3.19.1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 19 Jul 2023 16:35:54 -0700 Tony Luck wrote: > [resend as plain text - sorry for the earlier HTML] > > An internal team is seeing tests that worked on v6.0 fail on v6.3. The problem is that > rasdaemon isn’t waking up to process the “mce_record” trace events. > > Manually checking for them works: > > root@R-4251:/sys/kernel/debug/tracing>systemctl stop rasdaemon > root@R-4251:/sys/kernel/debug/tracing> > root@R-4251:/sys/kernel/debug/tracing> > root@R-4251:/sys/kernel/debug/tracing>echo 1 > events/mce/mce_record/enable > root@R-4251:/sys/kernel/debug/tracing> > root@R-4251:/sys/kernel/debug/tracing>cat trace_pipe > <...>-235 [000] ..... 596.892583: mce_record: CPU: 0, MCGc/s: f000c15/0, MC13: 8c00004200800090, IPID: 0000000000000000, ADDR/MISC/SYND: 0000000123450000/08000a80c2982086/0000000000000000, RIP: 00:<0000000000000000>, TSC: 14120b051a1, PROCESSOR: 0:c06f1, TIME: 1689802780, SOCKET: 0, APIC: 0 > kworker/0:2-235 [000] ..... 597.204343: mce_record: CPU: 0, MCGc/s: f000c15/0, MC255: 9c0000000000009f, IPID: 0000000000000000, ADDR/MISC/SYND: 0000000123450000/000000000000008c/0000000000000000, RIP: 00:<0000000000000000>, TSC: 0, PROCESSOR: 0:c06f1, TIME: 1689802781, SOCKET: 0, APIC: 0 > > So their tests are injecting errors, and the trace event is firing. > > Is there some updated version of rasdaemon needed? > > Some kernel CONFIG option problem? > A bug was fixed that I think affected rasdaemon. commit 3e46d910d8acf94e5360126593b68bf4fee4c4a1 Author: Shiju Jose Date: Thu Feb 2 18:23:09 2023 +0000 tracing: Fix poll() and select() do not work on per_cpu trace_pipe and trace_pipe_raw Make sure /sys/kernel/tracing/buffer_percent = 0 -- Steve