Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754539Ab1B1O37 (ORCPT ); Mon, 28 Feb 2011 09:29:59 -0500 Received: from mail-qw0-f46.google.com ([209.85.216.46]:51755 "EHLO mail-qw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754440Ab1B1O35 convert rfc822-to-8bit (ORCPT ); Mon, 28 Feb 2011 09:29:57 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=CioNQtvxc6mZJn5T2U0NLbq3Vy1sTRrUYoJ8vb2FjVIllJlN2Qfow2TRMud/iIkZq8 8x//JluaYs+f1mtVmbj01S79KUnrB74TczJ+mHhBSaxTAcZUfH1GcbPFTti5Me1vjmFU NjFgPzc6gF6V9Lo7Egur+Gsie3sXQEmWp78PQ= MIME-Version: 1.0 In-Reply-To: <20110228131118.GA18193@dhcp231-156.rdu.redhat.com> References: <20110228131118.GA18193@dhcp231-156.rdu.redhat.com> Date: Mon, 28 Feb 2011 22:29:56 +0800 Message-ID: Subject: Re: ext2/3/4: punch support? From: Dave Young To: Josef Bacik Cc: Theodore Tso , linux-ext4@vger.kernel.org, Linux Kernel Mailing List Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 973 Lines: 28 On Mon, Feb 28, 2011 at 9:11 PM, Josef Bacik wrote: > On Mon, Feb 28, 2011 at 03:03:40PM +0800, Dave Young wrote: >> Hi, josef and ext guys >> >> Do you have any plan with ext4 hole punching support? And the >> fallocate for ext2/3? >> >> What's the obstacle to work on this? could someone tell the status of >> this issue? > > There is no obstacle, just nobody has bothered to do it.  If you want to do it > go for it.  Thanks, Yes, I want to do some kvm image space discard stuff, I use ext4 as my filesystem, but currently only xfs support something like trim/discard. I know general knowledge about ext filesystem, but nearly new to ext4 code, could you give some hint where to start? -- Thanks dave -- 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/