From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934626Ab1FWXN6 (ORCPT ); Thu, 23 Jun 2011 19:13:58 -0400 Received: from mail-qw0-f46.google.com ([209.85.216.46]:45549 "EHLO mail-qw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934569Ab1FWXMy (ORCPT ); Thu, 23 Jun 2011 19:12:54 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; b=badqE1BtyvnlHZ5PmV1ZiewkNG0fX0kAs0n8VhjaSUm684Sjuhcb644bjOLz3JavB1 cY3cSP9qooAQJo9I5LRH8+X9o2vXi4EM3g2PKLzzb10ATv6Ep3fuP3zhhO4Sg+KYoryf Ktqm22nFMa/zCXbNoaGVOLkwHSwPfo13H0IlE= From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , "Paul E. McKenney" , Ingo Molnar , Peter Zijlstra , Thomas Gleixner , Lai Jiangshan Subject: [PATCH 2/3] rcu: Inform the user about dynticks idle mode on PROVE_RCU warning Date: Fri, 24 Jun 2011 01:12:39 +0200 Message-Id: <1308870760-14153-3-git-send-email-fweisbec@gmail.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1308870760-14153-1-git-send-email-fweisbec@gmail.com> References: <1308870760-14153-1-git-send-email-fweisbec@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Inform the user if we are in extended quiescent state when an illegal use of rcu is detected. Signed-off-by: Frederic Weisbecker Cc: Paul E. McKenney Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Lai Jiangshan --- kernel/lockdep.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/kernel/lockdep.c b/kernel/lockdep.c index df2ad37..e77de90 100644 --- a/kernel/lockdep.c +++ b/kernel/lockdep.c @@ -4008,6 +4008,10 @@ void lockdep_rcu_suspicious(const char *file, const int line, const char *s) printk("%s:%d %s!\n", file, line, s); printk("\nother info that might help us debug this:\n\n"); printk("\nrcu_scheduler_active = %d, debug_locks = %d\n", rcu_scheduler_active, debug_locks); + + if (rcu_check_extended_qs()) + printk("rcu is in extended quiescent state!\n"); + lockdep_print_held_locks(curr); printk("\nstack backtrace:\n"); dump_stack(); -- 1.7.5.4