From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oA9Ne7sv178676 for ; Tue, 9 Nov 2010 17:40:07 -0600 Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B2A931C2A1F3 for ; Tue, 9 Nov 2010 15:41:33 -0800 (PST) Received: from mail.internode.on.net (bld-mail18.adl2.internode.on.net [150.101.137.103]) by cuda.sgi.com with ESMTP id hG9lnOMBWKSTo1Ds for ; Tue, 09 Nov 2010 15:41:33 -0800 (PST) Date: Wed, 10 Nov 2010 10:40:49 +1100 From: Dave Chinner Subject: Re: [PATCH 1/6] fs: add hole punching to fallocate Message-ID: <20101109234049.GQ2715@dastard> References: <1289248327-16308-1-git-send-email-josef@redhat.com> <20101109011222.GD2715@dastard> <20101109033038.GF3099@thunk.org> <20101109044242.GH2715@dastard> <20101109214147.GK3099@thunk.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20101109214147.GK3099@thunk.org> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Ted Ts'o , Josef Bacik , linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, xfs@oss.sgi.com, joel.becker@oracle.com, cmm@us.ibm.com, cluster-devel@redhat.com T24gVHVlLCBOb3YgMDksIDIwMTAgYXQgMDQ6NDE6NDdQTSAtMDUwMCwgVGVkIFRzJ28gd3JvdGU6 Cj4gT24gVHVlLCBOb3YgMDksIDIwMTAgYXQgMDM6NDI6NDJQTSArMTEwMCwgRGF2ZSBDaGlubmVy IHdyb3RlOgo+ID4gSW1wbGVtZW50YXRpb24gaXMgdXAgdG8gdGhlIGZpbGVzeXN0ZW0uIEhvd2V2 ZXIsIFhGUyBkb2VzIChiKQo+ID4gYmVjYXVzZToKPiA+IAo+ID4gCTEpIGl0IHdhcyBleHRyZW1l bHkgc2ltcGxlIHRvIGltcGxlbWVudCAob25lIG9mIHRoZQo+ID4gCSAgIGFkdmFudGFnZXMgb2Yg aGF2aW5nIGFuIGV4Y2VlZGluZ2x5IGNvbXBsZXggYWxsb2NhdGlvbgo+ID4gCSAgIGludGVyZmFj ZSB0byBiZWdpbiB3aXRoIDpQKQo+ID4gCTIpIGNvbnZlcnNpb24gaXMgYXRvbWljLCBmYXN0IGFu ZCByZWxpYWJsZQo+ID4gCTMpIGl0IGlzIGluZGVwZW5kZW50IG9mIHRoZSB1bmRlcmx5aW5nIHN0 b3JhZ2U7IGFuZAo+ID4gCTQpIHJlYWRzIG9mIHVud3JpdHRlbiBleHRlbnRzIG9wZXJhdGUgYXQg bWVtb3J5IHNwZWVkLAo+ID4gCSAgIG5vdCBkaXNrIHNwZWVkLgo+IAo+IFllYWgsIEkgd2FzIHRo aW5raW5nIHRoYXQgdXNpbmcgYSBkZXZpY2Utc3R5bGUgVFJJTSBtaWdodCBiZSBiZXR0ZXIKPiBz aW5jZSBmdXR1cmUgYXR0ZW1wdHMgdG8gd3JpdGUgdG8gaXQgd29uJ3QgcmVxdWlyZSBhIHNlcGFy YXRlIHNlZWsgdG8KPiBtb2RpZnkgdGhlIGV4dGVudCB0cmVlLiAgQnV0IHllYWgsIHRoZXJlIGFy ZSBhIGJ1bmNoIG9mIGFkdmFudGFnZXMgb2YKPiBzaW1wbHkgbXV0YXRpbmcgdGhlIGV4dGVudCB0 cmVlLgo+IAo+IFdoaWxlIHdlJ3JlIG9uIHRoZSBzdWJqZWN0IG9mIGNoYW5nZXMgdG8gZmFsbG9j YXRlLCB3aGF0IGRvIHBlb3BsZQo+IHRoaW5rIG9mIEZBTExPQ19GTF9FWFBPU0VfT0xEX0RBVEEs IHdoaWNoIHJlcXVpcmVzIGVpdGhlciByb290Cj4gcHJpdmlsZWdlcyBvciAoaWYgY2FwYWJpbGl0 aWVzIGFyZSBpbiB1c2UpIENBUF9EQUNfT1ZFUlJJREUgJiYKPiBDQVBfTUFDX09WRVJSSURFICYm IENBUF9TWVNfQURNSU4uICBUaGlzIHdvdWxkIGFsbG93IGEgdHJ1c3RlZCBwcm9jZXNzCj4gdG8g ZmFsbG9jYXRlIGJsb2NrcyB3aXRoIHRoZSBleHRlbnQgYWxyZWFkeSBtYXJrZWQgaW5pdGlhbGl6 ZWQuICBJJ3ZlCj4gaGFkIHR3byByZXF1ZXN0cyBmb3Igc3VjaCBmdW5jdGlvbmFsaXR5IGZvciBl eHQ0IGFscmVhZHkuICAKCldlIHJlbW92ZWQgdGhhdCBhYmlsaXR5IGZyb20gWEZTIGFib3V0IHRo cmVlIHllYXJzIGFnbyBiZWNhdXNlIGl0J3MKYSBtYXNzaXZlIHNlY3VyaXR5IGhvbGUuIGUuZy4g d2hhdCBoYXBwZW5zIGlmIHRoZSBmaWxlIGlzIHdvcmxkCnJlYWRhYmxlLCBldmVuIHRob3VnaCB0 aGUgcHJvY2VzcyB0aGF0IGNhbGxlZApGQUxMT0NfRkxfRVhQT1NFX09MRF9EQVRBIHdhcyBwcml2 aWxlZ2VkIGFuZCB3YXMgYWxsb3dlZCB0byBleHBvc2UKc3VjaCBkYXRhPyBPciB0aGUgZmlsZSBp cyBjaG1vZCA3NzcgYWZ0ZXIgYmVpbmcgZXhwb3NlZD8KClRoZSBoaXN0b3JpY2FsIHJlYXNvbiBm b3Igc3VjaCBiZWhhdmlvdXIgZXhpc3RpbmcgaW4gWEZTIHdhcyB0aGF0IGluCjE5OTcgdGhlIENQ VSBhbmQgSU8gbGF0ZW5jeSBjb3N0IG9mIHVud3JpdHRlbiBleHRlbnQgY29udmVyc2lvbiB3YXMK c2lnbmlmaWNhbnQsIHNvIHVzZXJzIHdpdGggcmVhbCBwaHlzaWNhbCBzZWN1cml0eSAoaS5lLiBt YXJpbmVzIHdpdGgKZ3Vucykgd2VyZSBhYmxlIHRvIG1ha2UgdXNlIG9mIGZhc3QgcHJlYWxsb2Nh dGlvbiB3aXRoIG5vIGNvbnZlcnNpb24Kb3ZlcmhlYWQgd2l0aG91dCBjYXJpbmcgYWJvdXQgdGhl IHNlY3VyaXR5IGltcGxpY2F0aW9ucy4gVGhlc2UgZGF5cywKdGhlIHBlcmZvcm1hbmNlIG92ZXJo ZWFkIG9mIHVud3JpdHRlbiBleHRlbnQgY29udmVyc2lvbiBpcyBtaW5pbWFsIC0KSSBnZW5lcmFs bHkgY2FuJ3QgbWVhc3VyZSBhIGRpZmZlcmVuY2UgaW4gSU8gcGVyZm9ybWFuY2UgYXMgYSByZXN1 bHQKb2YgaXQgLSBzbyB0aGVyZSBpcyBzaW1wbHkgbm8gZ29vZCByZWHRlW9uIGZvciBsZWF2aW5n IHN1Y2ggYSBnYXBpbmcKc2VjdXJpdHkgaG9sZSBpbiB0aGUgc3lzdGVtLgoKSWYgYW55b25lIHdh bnRzIHRvIHJlYWQgdGhlIHVuZGVybHlpbmcgZGF0YSwgdGhlbiB1c2UgZmllbWFwIHRvIG1hcAp0 aGUgcGh5c2ljYWwgYmxvY2tzIGFuZCByZWFkIGl0IGRpcmVjdGx5IGZyb20gdGhlIGJsb2NrIGRl dmljZS4gVGhhdApyZXF1aXJlcyByb290IHByaXZpbGVnZXMgYnV0IGRvZXMgbm90IG9wZW4gYW55 IG5ldyBzdGFsZSBkYXRhCmV4cG9zdXJlIHByb2JsZW1zLi4uLgoKPiAoVGFrZSBmb3IgZXhhbXBs ZSBhIHRydXN0ZWQgY2x1c3RlciBmaWxlc3lzdGVtIGJhY2tlbmQgdGhhdCBjaGVja3MgdGhlCj4g b2JqZWN0IGNoZWNrc3VtIGJlZm9yZSByZXR1cm5pbmcgYW55IGRhdGEgdG8gdGhlIHVzZXI7IGFu ZCBpZiB0aGUKPiBjaGVjayBmYWlscyB0aGUgY2x1c3RlciBmaWxlIHN5c3RlbSB3aWxsIHRyeSB0 byB1c2Ugc29tZSBvdGhlciByZXBsaWNhCj4gc3RvcmVkIG9uIHNvbWUgb3RoZXIgc2VydmVyLikK CklPV3MsIGFsbCB0aGV5IHdhbnQgdG8gZG8gaXMgYXZvaWQgdGhlIHVud3JpdHRlbiBleHRlbnQg Y29udmVyc2lvbgpvdmVyaGVhZC4gVGltZSBoYXMgc2hvd24gdGhhdCBhIGJhZCBzZWN1cml0eS9w ZXJmb3JtYW5jZSB0cmFkZW9mZgpkZWNpc2lvbiB3YXMgbWFkZSAxMyB5ZWFycyBhZ28gaW4gWEZT LCBzbyBJIHNlZSBsaXR0bGUgcmVhc29uIHRvCnJlcGVhdCBpdCBmb3IgZXh0NCB0b2RheS4uLi4K CkNoZWVycywKCkRhdmUuCi0tIApEYXZlIENoaW5uZXIKZGF2aWRAZnJvbW9yYml0LmNvbQoKX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KeGZzIG1haWxpbmcg bGlzdAp4ZnNAb3NzLnNnaS5jb20KaHR0cDovL29zcy5zZ2kuY29tL21haWxtYW4vbGlzdGluZm8v eGZzCg==