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=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 341A8C43219 for ; Tue, 30 Apr 2019 14:45:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EEB1E2147A for ; Tue, 30 Apr 2019 14:45:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="BO36wZjt" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728077AbfD3OpC (ORCPT ); Tue, 30 Apr 2019 10:45:02 -0400 Received: from merlin.infradead.org ([205.233.59.134]:38168 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726053AbfD3OpC (ORCPT ); Tue, 30 Apr 2019 10:45:02 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=2zy5WWZhUu1HKZQxhEtm3bI8rt8uWeTC5jpNqHHiLhc=; b=BO36wZjt/Xs3KDdltNWtWIRFu RWyGaCRcX78PcToiXOHA4rsfeDot/37zU5kXTBPEX7gHyeylUJsA+4A2f4AhlGTZ4CJ0y1OnykDl3 8+Pqz3vcDvF6A0mgfks9Ck0jdBsdNvSyBIMzBguvgNa3IylP633sYKcpUzxLKiY7NL8vmmMkSK3JF 7HUVFKN6yPGHP/kALsApiQ8aymr7HIRjbpp5lTX02nNAitp5r7eqXaFnW+yWgOyTd19Oqk+LGmuv3 q+91sbldcJ1FBqKDQAip9k77LHFVV33QIvhTTzgx2rKdDZrM72X1oA7z6bh4WVqVBS2eFiWc5oqT9 KWzXYV4RA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1hLU0B-0001gt-4y; Tue, 30 Apr 2019 14:44:59 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id E5887236F9E80; Tue, 30 Apr 2019 16:44:57 +0200 (CEST) Date: Tue, 30 Apr 2019 16:44:57 +0200 From: Peter Zijlstra To: Oleg Nesterov Cc: Sebastian Andrzej Siewior , linux-rt-users , LKML , Thomas Gleixner , Daniel Bristot de Oliveira , Clark Williams , Juri Lelli , jack@suse.com Subject: Re: [RT WARNING] DEBUG_LOCKS_WARN_ON(rt_mutex_owner(lock) != current) with fsfreeze (4.19.25-rt16) Message-ID: <20190430144457.GJ2589@hirez.programming.kicks-ass.net> References: <20190326093421.GA29508@localhost.localdomain> <20190419085627.GI4742@localhost.localdomain> <20190430125130.uw7mhdnsoqr2v3gf@linutronix.de> <20190430132811.GB2589@hirez.programming.kicks-ass.net> <20190430141500.GE23020@redhat.com> <20190430144252.GF23020@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190430144252.GF23020@redhat.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 30, 2019 at 04:42:53PM +0200, Oleg Nesterov wrote: > I have cloned linux-rt-devel.git > > If I understand correctly, in rt rw_semaphore is actually defined in rwsem_rt.h > so percpu_rwsem_acquire() should probably do > > sem->rw_sem.rtmutex.owner = current; That'll screw the PI chain (if there is one), right?