From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755609AbcBIJC3 (ORCPT ); Tue, 9 Feb 2016 04:02:29 -0500 Received: from www.linutronix.de ([62.245.132.108]:37135 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753851AbcBIJCZ convert rfc822-to-8bit (ORCPT ); Tue, 9 Feb 2016 04:02:25 -0500 Date: Tue, 9 Feb 2016 10:02:19 +0100 From: Sebastian Andrzej Siewior To: Yang Shi Cc: rostedt@goodmis.org, catalin.marinas@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linaro-kernel@lists.linaro.org Subject: Re: [PATCH] arm64: replace read_lock to rcu lock in call_step_hook Message-ID: <20160209090219.GA13035@linutronix.de> References: <1454971764-30720-1-git-send-email-yang.shi@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8BIT In-Reply-To: <1454971764-30720-1-git-send-email-yang.shi@linaro.org> X-Key-Id: 2A8CF5D1 X-Key-Fingerprint: 6425 4695 FFF0 AA44 66CC 19E6 7B96 E816 2A8C F5D1 User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Yang Shi | 2016-02-08 14:49:24 [-0800]: >BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:917 … >This issue is similar with 62c6c61("arm64: replace read_lock to rcu lock in >call_break_hook"), but comes to single_step_handler. > >This also solves kgdbts boot test silent hang issue on 4.4 -rt kernel. I am going to apply this for -RT. Sebastian