From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755267Ab1BNCRh (ORCPT ); Sun, 13 Feb 2011 21:17:37 -0500 Received: from cpoproxy2-pub.bluehost.com ([67.222.39.38]:44563 "HELO cpoproxy2-pub.bluehost.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751256Ab1BNCRa (ORCPT ); Sun, 13 Feb 2011 21:17:30 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=default; d=tao.ma; h=Received:Message-ID:Date:From:User-Agent:MIME-Version:To:CC:Subject:References:In-Reply-To:Content-Type:Content-Transfer-Encoding:X-Identified-User; b=lDtWuwbantri2SBaPgEgZZtRSCgZGbUh5zSB3ch7j9Oe09irNYp1w/4im0fPumC4zKqcv9dxsNJPV72FNFR04glFzdDGD4+Ylwrs/iHHXtrOuePH0s3gP0RALFQ1Fo1E; Message-ID: <4D5890B6.2090105@tao.ma> Date: Mon, 14 Feb 2011 10:17:26 +0800 From: Tao Ma User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.9) Gecko/20100317 Thunderbird/3.0.4 MIME-Version: 1.0 To: Christoph Hellwig CC: xfs@oss.sgi.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: XFS status update for January 2011 References: <20110213184219.GA22792@infradead.org> In-Reply-To: <20110213184219.GA22792@infradead.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Identified-User: {1390:box585.bluehost.com:colyli:tao.ma} {sentby:smtp auth 114.251.86.0 authed with tm@tao.ma} Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Christoph, On 02/14/2011 02:42 AM, Christoph Hellwig wrote: > On the 4th of January we saw the release of Linux 2.6.37, which contains a > large XFS update: > > 67 files changed, 1424 insertions(+), 1524 deletions(-) > > User visible changes are the new XFS_IOC_ZERO_RANGE ioctl which allows > to convert already allocated space into unwritten extents that return > zeros on a read, > would you mind describing some scenario that this ioctl can be used. I am just wondering whether ocfs2 can implement it as well. Regards, Tao