From owner-freebsd-bugs@freebsd.org Thu Apr 5 06:17:27 2018 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id B107EF8E610 for ; Thu, 5 Apr 2018 06:17:27 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4D28A6B7EB for ; Thu, 5 Apr 2018 06:17:27 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 6D32877FA for ; Thu, 5 Apr 2018 06:17:26 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id w356HQHY049218 for ; Thu, 5 Apr 2018 06:17:26 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id w356HQjU049217 for freebsd-bugs@FreeBSD.org; Thu, 5 Apr 2018 06:17:26 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 227285] File descriptor passing does not work reliably on SMP system (cache coherency issue?) Date: Thu, 05 Apr 2018 06:17:26 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: jan.kokemueller@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Apr 2018 06:17:27 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D227285 --- Comment #4 from Jan Kokem=C3=BCller --- To uncover the bug it helps to run multiple instances at the same time and = to remove the debug output or to pipe it into /dev/null. After a few seconds, = at least some instances should be dead. I've tested only amd64 for now. I could reproduce it on stock FreeBSD 10/11 systems: FreeBSD 10.3-RELEASE-p24 FreeBSD 10.3-RELEASE-p24 #0: Wed Nov 15 04:57:40 U= TC 2017 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC a= md64 hw.model: Intel(R) Celeron(R) CPU N3150 @ 1.60GHz FreeBSD 11.1-RELEASE-p7 FreeBSD 11.1-RELEASE-p7 #0: Tue Mar 6 09:33:30 UTC 2018 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC a= md64 hw.model: Intel(R) Celeron(R) CPU G530 @ 2.40GHz --=20 You are receiving this mail because: You are the assignee for the bug.=