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=-5.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS 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 99A44C43331 for ; Thu, 7 Nov 2019 22:41:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 63B9220869 for ; Thu, 7 Nov 2019 22:41:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="DzxpbIWg" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727560AbfKGWk7 (ORCPT ); Thu, 7 Nov 2019 17:40:59 -0500 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:52613 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725945AbfKGWk6 (ORCPT ); Thu, 7 Nov 2019 17:40:58 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1573166457; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=qp0hliiBVCBl2TWF6Q+D6M1TDWdWYIueXrNe0KhBawg=; b=DzxpbIWghh3ztXidNl2kqK5vdMkHtIFCeGA5PESNXGHboS2rzqw/IJ/Zq5er37/5QB9eCe ThjrywYL6WOHmubwJTFVs0/z9e3znMYKWw1oLr4sKgIFPRkhdRuJD1ZvL6AYUSFzG6mvqT VDDVNSemFt7IE2F+HqfUZDGCrZYLTDk= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-319-u_p2t8psPXuVYLjcNZM6-w-1; Thu, 07 Nov 2019 17:40:54 -0500 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 26C951005500; Thu, 7 Nov 2019 22:40:53 +0000 (UTC) Received: from oldenburg2.str.redhat.com (ovpn-116-48.ams2.redhat.com [10.36.116.48]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 874776084E; Thu, 7 Nov 2019 22:40:45 +0000 (UTC) From: Florian Weimer To: Thomas Gleixner Cc: LKML , Peter Zijlstra , Ingo Molnar , Darren Hart , Yi Wang , Yang Tao , Oleg Nesterov , Carlos O'Donell , Alexander Viro Subject: Re: [patch 00/12] futex: Cure robust/PI futex exit races References: <20191106215534.241796846@linutronix.de> <87zhh78gnf.fsf@oldenburg2.str.redhat.com> Date: Thu, 07 Nov 2019 23:40:43 +0100 In-Reply-To: <87zhh78gnf.fsf@oldenburg2.str.redhat.com> (Florian Weimer's message of "Thu, 07 Nov 2019 23:29:08 +0100") Message-ID: <87v9rv8g44.fsf@oldenburg2.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-MC-Unique: u_p2t8psPXuVYLjcNZM6-w-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Florian Weimer: > * Thomas Gleixner: > >> The series is also available from git: >> >> git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.locking/= futex > > I ran the glibc upstream test suite (which has some robust futex tests) > against b21be7e942b49168ee15a75cbc49fbfdeb1e6a97 on x86-64, both native > and 32-bit/i386 compat mode. > > compat mode seems broken, nptl/tst-thread-affinity-pthread fails. This > is probably *not* due to > because the failur= e > is non-sporadic, but reliable fails for thread 253: > > info: Detected CPU set size (in bits): 225 > info: Maximum test CPU: 255 > error: pthread_create for thread 253 failed: Resource temporarily unavail= able > > I'm running this on a large box as root, so ulimits etc. do not apply. > > I did not see this failure with the x86-64 test. > > You should be able to reproduce with (assuming you've got a multilib gcc)= : > > git clone git://sourceware.org/git/glibc.git git > mkdir build > cd build > ../git/configure --prefix=3D/usr CC=3D"gcc -m32" CXX=3D"g++ -m32" --build= =3Di686-linux > make -j`nproc` > make test t=3Dnptl/tst-thread-affinity-pthread Sorry, I realized that I didn't actually verify that this is a regression caused by your patches. Maybe I can do that tomorrow. Florian