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=-10.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 EF421C48BDF for ; Fri, 18 Jun 2021 14:55:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CAD686128C for ; Fri, 18 Jun 2021 14:55:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234789AbhFRO6G (ORCPT ); Fri, 18 Jun 2021 10:58:06 -0400 Received: from pv50p00im-ztdg10021101.me.com ([17.58.6.44]:53438 "EHLO pv50p00im-ztdg10021101.me.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234712AbhFRO6G (ORCPT ); Fri, 18 Jun 2021 10:58:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=me.com; s=1a1hai; t=1624028156; bh=Ij8tlaut9s05rN09YP89e/qZ1FIC8Gnd8swZTHoz/Oo=; h=From:To:Subject:Date:Message-Id:MIME-Version; b=bab//e/f3y/EuyyFAtpgFwHub4SUYa+zFgXa3Q7XFZbtAGkoMmu1nrIvlbRaLlEsl IKRjXvYuAONmb4c3rFA+zjFaxr58QvRoIpC84hkgBR6HdKlOKY61LXfIJ93ldPYyIt 4ExtFz2pvIzSb1qSnLpzqkNVpyoAC85/UrV7WYhtpCrIqQdxLzkMYFDOb4oB9iWajp DEewb/cqzJ0dKPvu1i0+wH8N29cF8OYVJnQdO9P1oAaZVA26OQhkmEJfgonaEmMe17 /mPFCjS9xQ8K9MK0GbtlffhY2hJTaBgvYepP5wThleKoGauXoyxfG+9s7XCkujDFtA GFZmzlcA/0PDg== Received: from xiongwei.. (unknown [120.245.2.120]) by pv50p00im-ztdg10021101.me.com (Postfix) with ESMTPSA id 655BB18038B; Fri, 18 Jun 2021 14:55:53 +0000 (UTC) From: Xiongwei Song To: peterz@infradead.org, mingo@redhat.com, will@kernel.org, longman@redhat.com, boqun.feng@gmail.com Cc: linux-kernel@vger.kernel.org, Xiongwei Song Subject: [PATCH v2 0/3] some improvements for lockdep Date: Fri, 18 Jun 2021 22:55:31 +0800 Message-Id: <20210618145534.438816-1-sxwjean@me.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.790 definitions=2021-06-18_07:2021-06-18,2021-06-18 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 mlxscore=0 mlxlogscore=304 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-2009150000 definitions=main-2106180088 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Xiongwei Song Unlikely the checks of return values of graph walk will improve the performance to some degree, patch 1 and patch 2 are for this. The patch 3 will print a warning after counting lock deps when hitting bfs errors. v2: * For patch 3, avoid to call lockdep_unlock() twice after counting deps. Please see https://lkml.org/lkml/2021/6/17/741. Xiongwei Song (3): locking/lockdep: Unlikely bfs_error() inside locking/lockdep: Unlikely conditons about BFS_RMATCH locking/lockdep: Print possible warning after counting deps kernel/locking/lockdep.c | 55 +++++++++++++++++++--------------------- 1 file changed, 26 insertions(+), 29 deletions(-) -- 2.30.2