From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dkim2.fusionio.com ([66.114.96.54]:33663 "EHLO dkim2.fusionio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757616Ab3CFOHK (ORCPT ); Wed, 6 Mar 2013 09:07:10 -0500 Received: from mx1.fusionio.com (unknown [10.101.1.160]) by dkim2.fusionio.com (Postfix) with ESMTP id EA1389A03E9 for ; Wed, 6 Mar 2013 07:07:09 -0700 (MST) Date: Wed, 6 Mar 2013 09:07:07 -0500 From: Josef Bacik To: Liu Bo CC: "linux-btrfs@vger.kernel.org" , Chris Mason , Josef Bacik Subject: Re: [PATCH RFC] Btrfs: improve delalloc reservation Message-ID: <20130306140707.GA1905@localhost.localdomain> References: <1362567669-16477-1-git-send-email-bo.li.liu@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" In-Reply-To: <1362567669-16477-1-git-send-email-bo.li.liu@oracle.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Wed, Mar 06, 2013 at 04:01:09AM -0700, Liu Bo wrote: > Although we already have over commit stuff, btrfs write performance > still suffers from over reservation a lot. > I'm getting ready to rip all of the reservation code out and put in a ENOSPC log for a buffer area for delalloc writes and anything outstanding when we run out of space. This will give us the performance numbers we want and be ENOSPC safe, we'll stop having early enospc issues and we'll never actually run out of space. Thanks, Josef