From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751607AbeDGPjr (ORCPT ); Sat, 7 Apr 2018 11:39:47 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:60094 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751482AbeDGPjq (ORCPT ); Sat, 7 Apr 2018 11:39:46 -0400 Date: Sat, 7 Apr 2018 17:39:37 +0200 From: Peter Zijlstra To: Tetsuo Handa Cc: mingo@kernel.org, akpm@linux-foundation.org, dvyukov@google.com, paulmck@linux.vnet.ibm.com, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, msb@chromium.org, tglx@linutronix.de, vegard.nossum@oracle.com Subject: Re: [PATCH v2] locking/hung_task: Show all hung tasks before panic Message-ID: <20180407153937.GR4082@hirez.programming.kicks-ass.net> References: <1522678324-4855-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp> <20180402153530.GN3948@linux.vnet.ibm.com> <201804050705.BHE57833.HVFOFtSOMQJFOL@I-love.SAKURA.ne.jp> <201804072131.AEF86988.OFOQLJMVFFtOSH@I-love.SAKURA.ne.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <201804072131.AEF86988.OFOQLJMVFFtOSH@I-love.SAKURA.ne.jp> User-Agent: Mutt/1.9.3 (2018-01-21) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Apr 07, 2018 at 09:31:19PM +0900, Tetsuo Handa wrote: > are for replacing debug_show_all_locks() in check_hung_task() for cases like > https://syzkaller.appspot.com/bug?id=26aa22915f5e3b7ca2cfca76a939f12c25d624db > because we are interested in only threads holding locks. > > SysRq-t is too much but SysRq-w is useless for killable/interruptible threads... Or use a script to process the sysrq-t output? I mean, we can add all sorts, but where does it end?