From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262483AbVG2LVJ (ORCPT ); Fri, 29 Jul 2005 07:21:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262496AbVG2LVJ (ORCPT ); Fri, 29 Jul 2005 07:21:09 -0400 Received: from smtp.osdl.org ([65.172.181.4]:49543 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S262483AbVG2LVI (ORCPT ); Fri, 29 Jul 2005 07:21:08 -0400 Date: Fri, 29 Jul 2005 04:20:00 -0700 From: Andrew Morton To: Andrey Borzenkov Cc: linux-kernel@vger.kernel.org Subject: Re: Syncing single filesystem (slow USB writing) Message-Id: <20050729042000.48c40272.akpm@osdl.org> In-Reply-To: <200507291428.06903.arvidjaar@mail.ru> References: <200507290731.32694.arvidjaar@mail.ru> <20050728205016.1bdf7288.akpm@osdl.org> <200507291428.06903.arvidjaar@mail.ru> X-Mailer: Sylpheed version 1.0.4 (GTK+ 1.2.10; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andrey Borzenkov wrote: > > On Friday 29 July 2005 07:50, Andrew Morton wrote: > > > One idea how to improve situation - continue to mount with dsync (having > > > basically old case) and do frequent sync of filesystem (this culd be > > > started as HAL callout or whatever). Unfortunately, I could not find a > > > way to request a sync (flush) of single mount point or block device. Have > > > I missed something? > > > > It's trivial to do in-kernel but no, I'm afraid there isn't a userspace > > interface for this. > > apparently one should not ask such a question at 7 am. Any reason why > BLKFLSBUF does not suite? That'll only write back data associated with /dev/hdXX (ie: filesystem metadata) and not the data associated with all the files in the filesystem which is mounted on /dev/hdXX.