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 q5JDGx8v094094 for ; Tue, 19 Jun 2012 08:17:00 -0500 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id 4ViFjdzfrvEMblff for ; Tue, 19 Jun 2012 06:16:58 -0700 (PDT) Date: Tue, 19 Jun 2012 09:16:49 -0400 From: Mike Snitzer Subject: Re: Ext4 and xfs problems in dm-thin on allocation and discard Message-ID: <20120619131649.GA6811@redhat.com> References: <4FDF9EBE.2030809@shiftmail.org> <20120619015745.GJ25389@dastard> <20120619031241.GA3884@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: 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: =?utf-8?B?THVrw6HFoQ==?= Czerner Cc: device-mapper development , linux-ext4@vger.kernel.org, xfs@oss.sgi.com, Spelic T24gVHVlLCBKdW4gMTkgMjAxMiBhdCAgMjozMmFtIC0wNDAwLApMdWvDocWhIEN6ZXJuZXIgPGxj emVybmVyQHJlZGhhdC5jb20+IHdyb3RlOgoKPiBPbiBNb24sIDE4IEp1biAyMDEyLCBNaWtlIFNu aXR6ZXIgd3JvdGU6Cj4gCj4gPiBEYXRlOiBNb24sIDE4IEp1biAyMDEyIDIzOjEyOjQyIC0wNDAw Cj4gPiBGcm9tOiBNaWtlIFNuaXR6ZXIgPHNuaXR6ZXJAcmVkaGF0LmNvbT4KPiA+IFRvOiBEYXZl IENoaW5uZXIgPGRhdmlkQGZyb21vcmJpdC5jb20+Cj4gPiBDYzogU3BlbGljIDxzcGVsaWNAc2hp ZnRtYWlsLm9yZz4sCj4gPiAgICAgZGV2aWNlLW1hcHBlciBkZXZlbG9wbWVudCA8ZG0tZGV2ZWxA cmVkaGF0LmNvbT4sCj4gPiAgICAgbGludXgtZXh0NEB2Z2VyLmtlcm5lbC5vcmcsIHhmc0Bvc3Mu c2dpLmNvbQo+ID4gU3ViamVjdDogUmU6IEV4dDQgYW5kIHhmcyBwcm9ibGVtcyBpbiBkbS10aGlu IG9uIGFsbG9jYXRpb24gYW5kIGRpc2NhcmQKPiA+IAo+ID4gT24gTW9uLCBKdW4gMTggMjAxMiBh dCAgOTo1N3BtIC0wNDAwLAo+ID4gRGF2ZSBDaGlubmVyIDxkYXZpZEBmcm9tb3JiaXQuY29tPiB3 cm90ZToKPiA+IAo+ID4gPiBPbiBNb24sIEp1biAxOCwgMjAxMiBhdCAxMTozMzo1MFBNICswMjAw LCBTcGVsaWMgd3JvdGU6Cj4gPiA+Cj4gPiA+ID4gUGxlYXNlIG5vdGUgdGhhdCBzaW5jZSBJIGFt IGFib3ZlIE1EIHJhaWQ1IChJIGJlbGlldmUgdGhpcyBpcyB0aGUKPiA+ID4gPiByZWFzb24pLCB0 aGUgcGFzc2Rvd24gb2YgZGlzY2FyZHMgZG9lcyBub3Qgd29yaywgYXMgbXkgZG1lc2cgc2F5czoK PiA+ID4gPiBbMTYwNTA4LjQ5Nzg3OV0gZGV2aWNlLW1hcHBlcjogdGhpbjogRGlzY2FyZCB1bnN1 cHBvcnRlZCBieSBkYXRhCj4gPiA+ID4gZGV2aWNlIChkbS0xKTogRGlzYWJsaW5nIGRpc2NhcmQg cGFzc2Rvd24uCj4gPiA+ID4gYnV0IEFGQUlVLCB1bmxlc3MgdGhlcmUgaXMgYSB0aGlucCBidWcs IHRoaXMgc2hvdWxkIG5vdCBhZmZlY3QgdGhlCj4gPiA+ID4gdW5tYXBwaW5nIG9mIHRoaW4gYmxv Y2tzIGJ5IGZzdHJpbW1pbmcgeGZzLi4uIGFuZCBpbiBmYWN0IGV4dDQgaXMKPiA+ID4gPiBhYmxl IHRvIGRvIHRoYXQuCj4gPiA+IAo+ID4gPiBEb2VzIGV4dDQgcmVwb3J0IHRoYXQgc2FtZSBlcnJv cj8KPiA+IAo+ID4gVGhhdCBtZXNzYWdlIHNheXMgdGhlIHVuZGVybHlpbmcgZGV2aWNlIGRvZXNu J3Qgc3VwcG9ydCBkaXNjYXJkcwo+ID4gKGJlY2F1c2UgaXQgaXMgYW4gTUQgZGV2aWNlKS4gIEJ1 dCB0aGUgdGhpbnAgZGV2aWNlIHN0aWxsIGhhcyBkaXNjYXJkcwo+ID4gZW5hYmxlZCAtLSBpdCBq dXN0IHdvbid0IHBhc3MgdGhlIGRpc2NhcmRzIGRvd24gdG8gdGhlIHVuZGVybHlpbmcgZGF0YQo+ ID4gZGV2aWNlLgo+ID4gCj4gPiBTbyB5ZXMsIGl0J2xsIGhhcHBlbiB3aXRoIGV4dDQgLS0gaXQg aXMgZ2VuZXJhdGVkIHdoZW4gdGhlIHRoaW4tcG9vbAo+ID4gZGV2aWNlIGlzIGxvYWRlZCAod2hp Y2ggaGFwcGVucyBpbmRlcGVuZGVudCBvZiB0aGUgZmlsZXN5c3RlbSB0aGF0IGlzCj4gPiBsYXll cmVkIG9udG9wKS4KPiA+IAo+ID4gVGhlIGRpc2NhcmRzIHN0aWxsIGluZm9ybSB0aGUgdGhpbi1w b29sIHRoYXQgdGhlIGNvcnJlc3BvbmRpbmcgZXh0ZW50cwo+ID4gYXJlIG5vIGxvbmdlciBhbGxv Y2F0ZWQuCj4gCj4gU28gZG8gSSB1bmRlcnN0YW5kIGNvcnJlY3RseSB0aGF0IGV2ZW4gdGhvdWdo IHRoZSBkaXNjYXJkIGNhbWUKPiB0aHJvdWdoIGFuZCB0aGlucCB0b29rIGFkdmFudGFnZSBvZiBp dCBpdCBzdGlsbCByZXR1cm5zIEVPUE5PVFNVUFAgPwoKTm8sIG5vdCBjb3JyZWN0LiAgV2h5IGFy ZSB5b3UgYXNzdW1pbmcgdGhpcz8gIEkgbXVzdCBiZSBtaXNzaW5nCnNvbWV0aGluZyBmcm9tIHRo aXMgZGlzY3Vzc2lvbiB0aGF0IGxlZCB5b3UgdGhlcmUuCgo+IFRoaXMgc2VlbXMgcmF0aGVyIHN1 Ym9wdGltYWwuIElJUkMgdGhlcmUgd2FzIGEgZGlzY3Vzc2lvbiB0byBhZGQgYW4KPiBvcHRpb24g dG8gZW5hYmxlL2Rpc2FibGUgc2VuZGluZyBkaXNjYXJkIGluIHRoaW5wIHRhcmdldCBkb3duCj4g dG8gdGhlIGRldmljZS4KPiAKPiBTbyBtYXliZSBpdCBtaWdodCBiZSBhIGJpdCBzbWFydGVyIHRo YW4gdGhhdCBhbmQgYWN0dWFsbHkKPiBlbmFibGUvZGlzYWJsZSBkaXNjYXJkIHBhc3MgdGhyb3Vn aCBkZXBlbmRpbmcgb24gdGhlIHVuZGVybHlpbmcKPiBzdXBwb3J0LCBzbyB3ZSBkbyBub3QgYmxp bmRseSBzZW5kIGRpc2NhcmQgZG93biB0byB0aGUgZGV2aWNlIGV2ZW4KPiB0aG91Z2ggaXQgZG9l cyBub3Qgc3VwcG9ydCBpdC4KClllcywgdGhhdCBpcyB3aGF0IHdlIGRpZC4KCkRpc2NhcmRzIGFy ZSBlbmFibGVkIG15IGRlZmF1bHQgKGluY2x1ZGluZyBkaXNjYXJkIHBhc3Nkb3duKSwgYnV0IGlm IHRoZQp1bmRlcmx5aW5nIGRhdGEgZGV2aWNlIGRvZXNuJ3Qgc3VwcG9ydCBkaXNjYXJkcyB0aGVu IHRoZSBkaXNjYXJkcyB3aWxsCm5vdCBiZSBwYXNzZWQgZG93bi4KCkFuZCBoZXJlIGFyZSB0aGUg ZmVhdHVyZSBjb250cm9scyB0aGF0IGNhbiBiZSBwcm92aWRlZCB3aGVuIGxvYWRpbmcgdGhlCnRo aW4tcG9vbCdzIERNIHRhYmxlOgoKaWdub3JlX2Rpc2NhcmQ6IGRpc2FibGUgZGlzY2FyZApub19k aXNjYXJkX3Bhc3Nkb3duOiBkb24ndCBwYXNzIGRpc2NhcmRzIGRvd24gdG8gdGhlIGRhdGEgZGV2 aWNlCgotRU9QTk9UU1VQUCBpcyBvbmx5IGV2ZXIgcmV0dXJuZWQgaWYgJ2lnbm9yZV9kaXNjYXJk JyBpcyBwcm92aWRlZC4KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fCnhmcyBtYWlsaW5nIGxpc3QKeGZzQG9zcy5zZ2kuY29tCmh0dHA6Ly9vc3Muc2dpLmNv bS9tYWlsbWFuL2xpc3RpbmZvL3hmcwo=