Return-Path: linux-nfs-owner@vger.kernel.org Received: from mx2.netapp.com ([216.240.18.37]:33818 "EHLO mx2.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750797Ab2E1Qdr (ORCPT ); Mon, 28 May 2012 12:33:47 -0400 From: "Myklebust, Trond" To: "tao.peng@emc.com" CC: "bergwolf@gmail.com" , "linux-nfs@vger.kernel.org" Subject: RE: [PATCH 3/3] pnfsblock: bail out unaligned DIO Date: Mon, 28 May 2012 16:33:31 +0000 Message-ID: <1338222809.3472.13.camel@lade.trondhjem.org> References: <1338096780-2763-1-git-send-email-bergwolf@gmail.com> <1338096780-2763-4-git-send-email-bergwolf@gmail.com> <1338136717.3044.13.camel@lade.trondhjem.org> <1338176720.2265.8.camel@lade.trondhjem.org> In-Reply-To: Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org List-ID: T24gTW9uLCAyMDEyLTA1LTI4IGF0IDAwOjI2IC0wNDAwLCB0YW8ucGVuZ0BlbWMuY29tIHdyb3Rl Og0KPiA+IC0tLS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0tDQo+ID4gRnJvbTogTXlrbGVidXN0LCBU cm9uZCBbbWFpbHRvOlRyb25kLk15a2xlYnVzdEBuZXRhcHAuY29tXQ0KPiA+IFNlbnQ6IE1vbmRh eSwgTWF5IDI4LCAyMDEyIDExOjQ1IEFNDQo+ID4gVG86IFBlbmcsIFRhbw0KPiA+IENjOiBiZXJn d29sZkBnbWFpbC5jb207IGxpbnV4LW5mc0B2Z2VyLmtlcm5lbC5vcmcNCj4gPiBTdWJqZWN0OiBS RTogW1BBVENIIDMvM10gcG5mc2Jsb2NrOiBiYWlsIG91dCB1bmFsaWduZWQgRElPDQo+ID4gDQo+ ID4gT24gU3VuLCAyMDEyLTA1LTI3IGF0IDIyOjMwIC0wNDAwLCB0YW8ucGVuZ0BlbWMuY29tIHdy b3RlOg0KPiA+ID4gQXMgZXhwbGFpbiBpbiB0aGUgb3RoZXIgbWFpbCwgaXQgaXMgbmVjZXNzYXJ5 IHRvIGhhdmUgcG5mc19kaW9fYmVnaW4vZW5kLCBzbyBJIHByZWZlciB0byBkbyB0aGUgdGVzdA0K PiA+IGFzIGVhcmx5IGFzIHBvc3NpYmxlLCB3aGljaCBpcyBpbiBwbmZzX2Rpb19iZWdpbi4NCj4g PiANCj4gPiBUaGVyZSBpcyBubyBwbmZzX2Rpb19iZWdpbi9lbmQuDQo+IE9LLiBJIHdpbGwgcHV0 IERJTyBhbGlnbm1lbnQgdGVzdHMgaW5zaWRlIHBnX2luaXQuDQo+IA0KPiBBbmQgYW55IGNvbW1l bnRzIG9uIGZvciBzdGFibGUgcGF0Y2ggaW4gdGhlIHRocmVhZCAoW1BBVENIXSBwbmZzYmxvY2s6 IGJhaWwgb3V0IHBhZ2UgdW5hbGlnbmVkIElPKT8gSWYgeW91IGFncmVlLCBJIHdpbGwgYmFzZSBE SU8gY2hhbmdlcyBvbiB0b3Agb2YgaXQgdG8gYXZvaWQgY29uZmxpY3RzLg0KPiBUaGVyZSBhcmUg cmVhc29ucyB0byB0ZXN0IGFsaWdubWVudCBhdCBkaWZmZXJlbnQgcGxhY2UgZm9yIGJ1ZmZlciBJ TyBhbmQgRElPLiBGb3IgYnVmZmVyIElPLCBwZ19pbml0IGlzbid0IHRoZSByaWdodCBwbGFjZSBi ZWNhdXNlIHdlIGRvbid0IGhhdmUgbmZzIHBhZ2UgdGhlcmUuIEZvciBESU8sIHBnX3Rlc3QgaXNu J3QgdGhlIHJpZ2h0IHBsYWNlIGJlY2F1c2Ugd2UgbmVlZCB0byBjaGVjayBjcm9zcyBwYWdlIGJv dW5kYXJ5Lg0KDQpTaW5jZSBhbGwgcGFnZXMgaW4gdGhlIHN0cnVjdCBuZnNfcGFnZWlvX2Rlc2Ny aXB0b3IgYXJlIGd1YXJhbnRlZWQgdG8gYmUNCmNvbnRpZ3VvdXMsIHlvdSByZWFsbHkgb25seSBu ZWVkIHRvIGNoZWNrIHRoZSBmaXJzdCBhbmQgbGFzdCBwYWdlIGluIHRoZQ0Kc2VyaWVzIGZvciBh bGlnbm1lbnQuDQoNCnBnX2luaXQoKSBkb2VzIHRha2UgdGhlIGZpcnN0IG5mc19wYWdlIHJlcXVl c3QgYXMgaXRzIGFyZ3VtZW50IGFuZCBzbyBpdA0Kc2hvdWxkIGJlIHBvc3NpYmxlIHRvIGNoZWNr IHRoZSBhbGlnbm1lbnQgb2YgdGhlIGZpcnN0IHBhZ2UgaW4gdGhlDQpzZXJpZXMgdGhlcmUuDQpZ b3UgY2FuIHRoZW4gY2hlY2sgdGhlIGFsaWdubWVudCBvZiB0aGUgbGFzdCBwYWdlIGluIHlvdXIN Ci0+d3JpdGVfcGFnZWxpc3QoKSBhbmQgcmV0dXJuIFBORlNfTk9UX0FUVEVNUFRFRCBpZiBhcHBy b3ByaWF0ZS4NCg0KTm90ZSB0aGF0IGFsbCBhcHBsaWNhdGlvbnMgdGhhdCB1c2UgT19ESVJFQ1Qg YXJlIGV4cGVjdGVkIHRvIHVzZSBhbGlnbmVkDQptZW1vcnksIHNpbmNlIHRoYXQncyB3aGF0IHRo ZSBvcGVuKCkgbWFucGFnZSBpbXBsaWVzIGlzIHRoZSBzYWZlIG9wdGlvbg0KZm9yIGFsbCBmaWxl c3lzdGVtcy4gVW5hbGlnbmVkIG1lbW9yeSBpcyB0aGVyZWZvcmUgbm90IHNvbWV0aGluZyB0aGF0 IHdlDQpuZWVkIHRvIG9wdGltaXNlIGZvci4NCg0KLS0gDQpUcm9uZCBNeWtsZWJ1c3QNCkxpbnV4 IE5GUyBjbGllbnQgbWFpbnRhaW5lcg0KDQpOZXRBcHANClRyb25kLk15a2xlYnVzdEBuZXRhcHAu Y29tDQp3d3cubmV0YXBwLmNvbQ0KDQo=