Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932697AbWHNUOI (ORCPT ); Mon, 14 Aug 2006 16:14:08 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932695AbWHNUOH (ORCPT ); Mon, 14 Aug 2006 16:14:07 -0400 Received: from brick.kernel.dk ([62.242.22.158]:3923 "EHLO kernel.dk") by vger.kernel.org with ESMTP id S932693AbWHNUOF (ORCPT ); Mon, 14 Aug 2006 16:14:05 -0400 Date: Mon, 14 Aug 2006 22:15:46 +0200 From: Jens Axboe To: Arjan van de Ven Cc: Jeff Garzik , Linux Kernel , Andrew Morton , SCSI Mailing List , Linux RAID Mailing List Subject: Re: Getting 'sync' to flush disk cache? Message-ID: <20060814201545.GE16819@suse.de> References: <44E0C373.6060008@garzik.org> <1155584098.2886.271.camel@laptopd505.fenrus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1155584098.2886.271.camel@laptopd505.fenrus.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 917 Lines: 22 On Mon, Aug 14 2006, Arjan van de Ven wrote: > On Mon, 2006-08-14 at 14:39 -0400, Jeff Garzik wrote: > > So... has anybody given any thought to enabling fsync(2), fdatasync(2), > > and sync_file_range(2) issuing a [FLUSH|SYNCHRONIZE] CACHE command? > > > > This has bugged me for _years_, that Linux does not do this. Looking at > > forums on the web, it bugs a lot of other people too. > > eh afaik 2.6.17 and such do this if you have barriers enabled... That is correct, but it only works on reiserfs and XFS and user space really cannot tell whether it did the right thing or not. File system developers really should take this more seriously... -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/