From owner-freebsd-stable@FreeBSD.ORG Tue Sep 30 02:01:02 2014 Return-Path: <owner-freebsd-stable@FreeBSD.ORG> Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id D69603D4 for <freebsd-stable@freebsd.org>; Tue, 30 Sep 2014 02:01:02 +0000 (UTC) Received: from mail.akips.com (mail.akips.com [65.19.130.19]) by mx1.freebsd.org (Postfix) with ESMTP id C49A23FE for <freebsd-stable@freebsd.org>; Tue, 30 Sep 2014 02:01:02 +0000 (UTC) Received: from akips.com (CPE-120-146-191-2.static.qld.bigpond.net.au [120.146.191.2]) by mail.akips.com (Postfix) with ESMTPSA id 8804721 for <freebsd-stable@freebsd.org>; Tue, 30 Sep 2014 11:54:28 +1000 (EST) Date: Tue, 30 Sep 2014 11:54:07 +1000 From: Paul Koch <paul.koch@akips.com> To: freebsd-stable@freebsd.org Subject: 10.1 mmap MAP_NOSYNC regression due to fast path Message-ID: <20140930115407.01ce9776@akips.com> Organization: AKIPS X-Mailer: Claws Mail 3.10.1 (GTK+ 2.24.22; amd64-portbld-freebsd10.0) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=0.0 required=5.0 tests=UNPARSEABLE_RELAY, URIBL_BLOCKED autolearn=disabled version=3.4.0 X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on host1.akips.com X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org> List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-stable>, <mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable/> List-Post: <mailto:freebsd-stable@freebsd.org> List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help> List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, <mailto:freebsd-stable-request@freebsd.org?subject=subscribe> X-List-Received-Date: Tue, 30 Sep 2014 02:01:02 -0000 Hi, just wondering if the regression introduced by the changes for 'fast path' to the mmap MAP_NOSYNC behaviour will be fixed for 10.1 ? http://lists.freebsd.org/pipermail/freebsd-hackers/2014-September/045981.html We have been doing some testing with 10.1-BETA3 and the regression makes 10.1 completely unusable because we rely very heavily on this long standing feature of mmap. Our database design mmaps large files (eg. several gigabytes) and we manually control when the sync happens by using fsync() at appropriate times. Paul. -- Paul Koch | Founder, CEO AKIPS Network Monitor http://www.akips.com Brisbane, Australia