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 A8EE7C6FA82 for ; Thu, 22 Sep 2022 15:34:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230210AbiIVPe4 (ORCPT ); Thu, 22 Sep 2022 11:34:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40308 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229676AbiIVPex (ORCPT ); Thu, 22 Sep 2022 11:34:53 -0400 Received: from smtpout.efficios.com (smtpout.efficios.com [167.114.26.122]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E08E03DF12; Thu, 22 Sep 2022 08:34:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=efficios.com; s=smtpout1; t=1663860887; bh=5Ep3EBM1hIoqjRHZdJsBaCJcMFgOZVCUSGq+oVi8Y6c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WqbPB7YtbE+32T8k0MINGVkVVhw2+LNTMIExACWsImLGNPj4O3FylcFOFsLfCWOf/ U1jG12CppL7TykiYG5J2V0snXXsnIT10u1iIFxwBmGHpZiqo9ZnSrc0YovOIznkce5 3tgfwIDyaUcAXP4F+d5+70QzWj/sGe7tew2yVzqz8qw/T/uaKC0hpAFkGrfMew4fZT nxDWGwgNugDj1ibd9vWshJIFoG2m2Oq5y84xqoXh78NHa+mmi8U/b073yiwikCyNeM Bnd0uJh5LlM/LV7fkuEntIIxND99Z6JB2GHqlpUiFX0b3uR3b0vNbrxQeKkChBu5Or gixD3E5M3Curg== Received: from localhost.localdomain (192-222-180-24.qc.cable.ebox.net [192.222.180.24]) by smtpout.efficios.com (Postfix) with ESMTPSA id 4MYK8l4gwxzNWT; Thu, 22 Sep 2022 11:34:47 -0400 (EDT) From: Mathieu Desnoyers To: Peter Zijlstra Cc: linux-kernel@vger.kernel.org, Thomas Gleixner , "Paul E . McKenney" , Boqun Feng , "H . Peter Anvin" , Paul Turner , linux-api@vger.kernel.org, Christian Brauner , Florian Weimer , David.Laight@ACULAB.COM, carlos@redhat.com, Peter Oskolkov , Alexander Mikhalitsyn , Mathieu Desnoyers Subject: [PATCH v4.1 25/25] tracing/rseq: Add mm_vcpu_id field to rseq_update Date: Thu, 22 Sep 2022 11:33:04 -0400 Message-Id: <20220922153304.281881-1-mathieu.desnoyers@efficios.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <202209222301.8AZY1n7J-lkp@intel.com> References: <202209222301.8AZY1n7J-lkp@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add the mm_vcpu_id field to the rseq_update event, allowing tracers to follow which vcpu_id is observed by user-space, and whether negative vcpu_id values are visible in case of internal scheduler implementation issues. Signed-off-by: Mathieu Desnoyers --- Changes since v4: - use task_mm_vcpu_id() to get the mm_vcpu_id from the task struct. --- include/trace/events/rseq.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/trace/events/rseq.h b/include/trace/events/rseq.h index 6bd442697354..cef5a91a9ba0 100644 --- a/include/trace/events/rseq.h +++ b/include/trace/events/rseq.h @@ -17,14 +17,17 @@ TRACE_EVENT(rseq_update, TP_STRUCT__entry( __field(s32, cpu_id) __field(s32, node_id) + __field(s32, mm_vcpu_id) ), TP_fast_assign( __entry->cpu_id = raw_smp_processor_id(); __entry->node_id = cpu_to_node(raw_smp_processor_id()); + __entry->mm_vcpu_id = task_mm_vcpu_id(t); ), - TP_printk("cpu_id=%d node_id=%d", __entry->cpu_id, __entry->node_id) + TP_printk("cpu_id=%d node_id=%d mm_vcpu_id=%d", __entry->cpu_id, + __entry->node_id, __entry->mm_vcpu_id) ); TRACE_EVENT(rseq_ip_fixup, -- 2.25.1