From owner-freebsd-bugs@freebsd.org Sun Apr 8 20:06:03 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 89C6CF9ED26 for ; Sun, 8 Apr 2018 20:06:03 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 1A65583DB9 for ; Sun, 8 Apr 2018 20:06:03 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id CCDDBF9ED10; Sun, 8 Apr 2018 20:06:02 +0000 (UTC) Delivered-To: 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 BA6B1F9ED0E for ; Sun, 8 Apr 2018 20:06:02 +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 5270283D98 for ; Sun, 8 Apr 2018 20:06:02 +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 84EF21C115 for ; Sun, 8 Apr 2018 20:06:01 +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 w38K61Z5016602 for ; Sun, 8 Apr 2018 20:06:01 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id w38K61tC016601 for bugs@FreeBSD.org; Sun, 8 Apr 2018 20:06:01 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: bugs@FreeBSD.org Subject: [Bug 227285] File descriptor passing does not work reliably on SMP system (cache coherency issue?) Date: Sun, 08 Apr 2018 20:06:01 +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: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: attachments.isobsolete attachments.created 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: Sun, 08 Apr 2018 20:06:03 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D227285 Jan Kokem=C3=BCller changed: What |Removed |Added ---------------------------------------------------------------------------- Attachment #192213|0 |1 is obsolete| | Attachment #192214|0 |1 is obsolete| | Attachment #192216|0 |1 is obsolete| | --- Comment #5 from Jan Kokem=C3=BCller --- Created attachment 192350 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D192350&action= =3Dedit tar archive with test program, Dtrace script and log output I've attached a program that reproduces the bug faster. I've also updated t= he Dtrace script and added some new log output. The Dtrace script now prints a= ll socantrcvmore() calls, not only those from "a.out". It turns out that the kernel sometimes closes the socket in the unp garbage collector (look for sockbuf fffff800adec3b50 in the debug log). So there probably is no cache issue after all. Investigating further... --=20 You are receiving this mail because: You are the assignee for the bug.=