From owner-freebsd-gecko@freebsd.org Fri Sep 15 19:49:14 2017 Return-Path: Delivered-To: freebsd-gecko@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 8CFC9E05BA1 for ; Fri, 15 Sep 2017 19:49:14 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 74AC275FF7 for ; Fri, 15 Sep 2017 19:49:14 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id 71374E05B9E; Fri, 15 Sep 2017 19:49:14 +0000 (UTC) Delivered-To: gecko@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 70E45E05B9D for ; Fri, 15 Sep 2017 19:49:14 +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 mx1.freebsd.org (Postfix) with ESMTPS id 5F76875FF5 for ; Fri, 15 Sep 2017 19:49:14 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id v8FJnDCj033254 for ; Fri, 15 Sep 2017 19:49:14 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: gecko@FreeBSD.org Subject: [Bug 222356] www/firefox: file-backed shared memory performance Date: Fri, 15 Sep 2017 19:49:14 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Ports & Packages X-Bugzilla-Component: Individual Port(s) X-Bugzilla-Version: Latest X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: kib@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: gecko@FreeBSD.org X-Bugzilla-Flags: maintainer-feedback? 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-gecko@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Gecko Rendering Engine issues List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 15 Sep 2017 19:49:14 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D222356 --- Comment #1 from Konstantin Belousov --- Could it be that msync(2) is called over that mappings ? Try this diff --git a/sys/vm/vm_object.c b/sys/vm/vm_object.c index fa197214296..33e7e6f8643 100644 --- a/sys/vm/vm_object.c +++ b/sys/vm/vm_object.c @@ -1083,8 +1068,8 @@ vm_object_sync(vm_object_t object, vm_ooffset_t offse= t, vm_size_t size, * I/O. */ if (object->type =3D=3D OBJT_VNODE && - (object->flags & OBJ_MIGHTBEDIRTY) !=3D 0) { - vp =3D object->handle; + (object->flags & OBJ_MIGHTBEDIRTY) !=3D 0 && + ((vp =3D object->handle)->v_vflag & VV_NOSYNC) =3D=3D 0) { VM_OBJECT_WUNLOCK(object); (void) vn_start_write(vp, &mp, V_WAIT); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); --=20 You are receiving this mail because: You are the assignee for the bug.=