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 B2A37C4167B for ; Tue, 22 Nov 2022 20:41:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234975AbiKVUla (ORCPT ); Tue, 22 Nov 2022 15:41:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46076 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234926AbiKVUj5 (ORCPT ); Tue, 22 Nov 2022 15:39:57 -0500 Received: from smtpout.efficios.com (smtpout.efficios.com [167.114.26.122]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4B99D697D9; Tue, 22 Nov 2022 12:39:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=efficios.com; s=smtpout1; t=1669149593; bh=7vURJNeXW9U22SN33WMla8+qcI4XLD3d3buEpebC6PI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KO6Zo8FfRfpxU3iNEwBJS8Lx1YxD9DnJ9LJL5kQ9gwyfcbW2fnKno/VlROUxSmcS2 IOeckpiiQzEGPEQlOEtN9Bu9bngTntC3umbr+YEscCP2z0GfRC/t+Zbfsr8LNDx5B1 zRx6pkIXVl1/9F6flzkgPQ8qBfKvT5okAZzCKejZjXN0UUtOnZliRlirNGb8f0FURz /tnQCWcL7DDS2T5He78GIHUFQ9cmdeU4fhhsnAkNzNcp3zwYPYegMLL9hFAvXZI+OS 3jfmFzd82pX46H7B8kd9q5mCLSEvM6Y4WXia+bRebXaAmzp65U5kOnr36yB8Zd9Z6A Su92sdhQw0amQ== Received: from localhost.localdomain (192-222-180-24.qc.cable.ebox.net [192.222.180.24]) by smtpout.efficios.com (Postfix) with ESMTPSA id 4NGx2d1FZrzXP8; Tue, 22 Nov 2022 15:39:53 -0500 (EST) 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 , Chris Kennelly , Mathieu Desnoyers Subject: [PATCH 21/30] tracing/rseq: Add mm_cid field to rseq_update Date: Tue, 22 Nov 2022 15:39:23 -0500 Message-Id: <20221122203932.231377-22-mathieu.desnoyers@efficios.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221122203932.231377-1-mathieu.desnoyers@efficios.com> References: <20221122203932.231377-1-mathieu.desnoyers@efficios.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-api@vger.kernel.org Add the mm_cid field to the rseq_update event, allowing tracers to follow which mm_cid is observed by user-space, and whether negative mm_cid 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. Changes since v5: - rename vcpu_id to mm_cid. --- 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 dde7a359b4ef..823b47d1ba1e 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_cid) ), TP_fast_assign( __entry->cpu_id = raw_smp_processor_id(); __entry->node_id = cpu_to_node(__entry->cpu_id); + __entry->mm_cid = task_mm_cid(t); ), - TP_printk("cpu_id=%d node_id=%d", __entry->cpu_id, __entry->node_id) + TP_printk("cpu_id=%d node_id=%d mm_cid=%d", __entry->cpu_id, + __entry->node_id, __entry->mm_cid) ); TRACE_EVENT(rseq_ip_fixup, -- 2.25.1