Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754835AbbLKJ7r (ORCPT ); Fri, 11 Dec 2015 04:59:47 -0500 Received: from foss.arm.com ([217.140.101.70]:60276 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754518AbbLKJ7n (ORCPT ); Fri, 11 Dec 2015 04:59:43 -0500 Date: Fri, 11 Dec 2015 09:59:46 +0000 From: Will Deacon To: David Daney Cc: Davidlohr Bueso , "Peter Zijlstra (Intel)" , Thomas Gleixner , "Paul E. McKenney" , Ingo Molnar , Linux Kernel Mailing List , "linux-arm-kernel@lists.infradead.org" , "Pinski, Andrew" Subject: Re: Commit 81a43adae3b9 (locking/mutex: Use acquire/release semantics) causing failures on arm64 (ThunderX) Message-ID: <20151211095946.GC18828@arm.com> References: <5669D5F2.5050004@caviumnetworks.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5669D5F2.5050004@caviumnetworks.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 838 Lines: 21 On Thu, Dec 10, 2015 at 11:43:46AM -0800, David Daney wrote: > We are getting soft lockup OOPs on Cavium CN88XX (A.K.A. ThunderX), which is > an arm64 implementation. [...] > At this point it is unknown if this patch is incorrect, or if the underlying > ARM64 atomic_*_{acquire,release} primitives are defective, or if the problem > lies elsewhere. Are you using the ll/sc or lse versions of the atomics? In the case of the former, are they inline or out-of-line (this depends on whether or not you've selected CONFIG_ARM64_LSE_ATOMICS and whether or not you have toolchain support)? Will -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/