Return-Path: linux-nfs-owner@vger.kernel.org Received: from mx2.netapp.com ([216.240.18.37]:54117 "EHLO mx2.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756773Ab2IDMEe (ORCPT ); Tue, 4 Sep 2012 08:04:34 -0400 From: "Myklebust, Trond" To: Andrew Holway CC: "kvm@vger.kernel.org" , "libvir-list@redhat.com" , "linux-nfs@vger.kernel.org" Subject: Re: NFS over RDMA small block DIRECT_IO bug Date: Tue, 4 Sep 2012 12:04:31 +0000 Message-ID: <4FA345DA4F4AE44899BD2B03EEEC2FA908F82C6C@SACEXCMBX04-PRD.hq.netapp.com> References: In-Reply-To: Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org List-ID: T24gVHVlLCAyMDEyLTA5LTA0IGF0IDExOjMxICswMjAwLCBBbmRyZXcgSG9sd2F5IHdyb3RlOg0K PiBIZWxsby4NCj4gDQo+ICMgQXZpIEtpdml0eSBhdmkoYSlyZWRoYXQgcmVjb21tZW5kZWQgSSBj b3B5IGt2bSBpbiBvbiB0aGlzLiBJdCB3b3VsZCBhbHNvIHNlZW0gcmVsZXZlbnQgdG8gbGlidmly dC4gIw0KPiANCj4gSSBoYXZlIGEgQ2VudG9zIDYuMiBzZXJ2ZXIgYW5kIENlbnRvcyA2LjIgY2xp ZW50Lg0KPiANCj4gW3Jvb3RAc3RvcmUgfl0jIGNhdCAvZXRjL2V4cG9ydHMgDQo+IC9kZXYvc2ht CQkJCTEwLjE0OS4wLjAvMTYocncsZnNpZD0xLG5vX3Jvb3Rfc3F1YXNoLGluc2VjdXJlKSAgICAo SSBoYXZlIHRyaWVkIHdpdGggbm9uIHRlbXBmcyB0YXJnZXRzIGFsc28pDQo+IA0KPiANCj4gW3Jv b3RAbm9kZTAwMSB+XSMgY2F0IC9ldGMvZnN0YWIgDQo+IHN0b3JlLmlibmV0Oi9kZXYvc2htICAg ICAgICAgICAgIC9tbnQgICAgICAgICAgICAgICAgIG5mcyAgICAgICAgICByZG1hLHBvcnQ9MjA1 MCxkZWZhdWx0cyAwIDANCj4gDQo+IA0KPiBJIHdyb3RlIGEgbGl0dGxlIGZvciBsb29wIG9uZSBs aW5lciB0aGF0IGRkJ2QgdGhlIGNlbnRvcyBuZXQgaW5zdGFsbCBpbWFnZSB0byBhIGZpbGUgY2Fs bGVkICdoZWxsbycgdGhlbiBjaGVja3N1bW1lZCB0aGF0IGZpbGUuIEVhY2ggaXRlcmF0aW9uIHVz ZXMgYSBkaWZmZXJlbnQgYmxvY2sgc2l6ZS4NCj4gDQo+IE5vbiBESVJFQ1RfSU8gc2VlbXMgdG8g d29yayBmaW5lLiBESVJFQ1RfSU8gd2l0aCA1MTJieXRlLCAxSyBhbmQgMksgYmxvY2sgc2l6ZXMg Z2V0IGNvcnJ1cHRlZC4NCg0KDQpUaGF0IGlzIGV4cGVjdGVkIGJlaGF2aW91ci4gRElSRUNUX0lP IG92ZXIgUkRNQSBuZWVkcyB0byBiZSBwYWdlIGFsaWduZWQNCnNvIHRoYXQgaXQgY2FuIHVzZSB0 aGUgbW9yZSBlZmZpY2llbnQgUkRNQSBSRUFEIGFuZCBSRE1BIFdSSVRFIG1lbW9yeQ0Kc2VtYW50 aWNzIChpbnN0ZWFkIG9mIHRoZSBTRU5EL1JFQ0VJVkUgY2hhbm5lbCBzZW1hbnRpY3MpLg0KDQo+ IEkgd2FudCB0byBydW4gbXkgS1ZNIGd1ZXN0cyBvbiB0b3Agb2YgTkZTIG92ZXIgUkRNQS4gTXkg Z3Vlc3RzIGNhbm5vdCBjcmVhdGUgZmlsZXN5c3RlbXMuDQo+IA0KPiBUaGFua3MsDQo+IA0KPiBB bmRyZXcuDQo+IA0KPiBidWcgcmVwb3J0OiBodHRwczovL2J1Z3ppbGxhLmxpbnV4LW5mcy5vcmcv c2hvd19idWcuY2dpP2lkPTIyOA0KPiANCj4gW3Jvb3RAbm9kZTAwMSBtbnRdIyBmb3IgZiBpbiA1 MTIgMTAyNCAyMDQ4IDQwOTYgODE5MiAxNjM4NCAzMjc2OCA2NTUzNiAxMzEwNzI7IGRvIGRkIGJz PSIkZiIgaWY9Q2VudE9TLTYuMy14ODZfNjQtbmV0aW5zdGFsbC5pc28gb2Y9aGVsbG8gaWZsYWc9 ZGlyZWN0IG9mbGFnPWRpcmVjdCAmJiBtZDVzdW0gaGVsbG8gJiYgcm0gLWYgaGVsbG87IGRvbmUN Cj4gDQo+IDQwOTYwMCswIHJlY29yZHMgaW4NCj4gNDA5NjAwKzAgcmVjb3JkcyBvdXQNCj4gMjA5 NzE1MjAwIGJ5dGVzICgyMTAgTUIpIGNvcGllZCwgNjIuMzY0OSBzLCAzLjQgTUIvcw0KPiBhYWRk MGZmZTNjOWRmYTM1ZDgzNTRlOTllY2FjOTI3NiAgaGVsbG8gLS0gNTEyIGJ5dGUgYmxvY2sgDQo+ IA0KPiAyMDQ4MDArMCByZWNvcmRzIGluDQo+IDIwNDgwMCswIHJlY29yZHMgb3V0DQo+IDIwOTcx NTIwMCBieXRlcyAoMjEwIE1CKSBjb3BpZWQsIDQxLjM4NzYgcywgNS4xIE1CL3MNCj4gMzM2ZjZk YTc4ZjkzZGFiNTkxZWRjMThkYTgxZjAwMmUgIGhlbGxvIC0tIDFLIGJsb2NrDQo+IA0KPiAxMDI0 MDArMCByZWNvcmRzIGluDQo+IDEwMjQwMCswIHJlY29yZHMgb3V0DQo+IDIwOTcxNTIwMCBieXRl cyAoMjEwIE1CKSBjb3BpZWQsIDIxLjE3MTIgcywgOS45IE1CL3MNCj4gZjRjZWZlMGEwNWM5YjQ3 YmE2OGVmZmRiMTdkYzk1ZDYgIGhlbGxvIC0tIDJrIGJsb2NrDQo+IA0KPiA1MTIwMCswIHJlY29y ZHMgaW4NCj4gNTEyMDArMCByZWNvcmRzIG91dA0KPiAyMDk3MTUyMDAgYnl0ZXMgKDIxMCBNQikg Y29waWVkLCAxMC45NjMxIHMsIDE5LjEgTUIvcw0KPiA2OTAxMzg5MDhkZTUxNmI2ZTVkN2QxODBk MDg1YzNmMyAgaGVsbG8gLS0gNGsgYmxvY2sNCj4gDQo+IDI1NjAwKzAgcmVjb3JkcyBpbg0KPiAy NTYwMCswIHJlY29yZHMgb3V0DQo+IDIwOTcxNTIwMCBieXRlcyAoMjEwIE1CKSBjb3BpZWQsIDUu NDEzNiBzLCAzOC43IE1CL3MNCj4gNjkwMTM4OTA4ZGU1MTZiNmU1ZDdkMTgwZDA4NWMzZjMgIGhl bGxvDQo+IA0KPiAxMjgwMCswIHJlY29yZHMgaW4NCj4gMTI4MDArMCByZWNvcmRzIG91dA0KPiAy MDk3MTUyMDAgYnl0ZXMgKDIxMCBNQikgY29waWVkLCAzLjE0NDggcywgNjYuNyBNQi9zDQo+IDY5 MDEzODkwOGRlNTE2YjZlNWQ3ZDE4MGQwODVjM2YzICBoZWxsbw0KPiANCj4gNjQwMCswIHJlY29y ZHMgaW4NCj4gNjQwMCswIHJlY29yZHMgb3V0DQo+IDIwOTcxNTIwMCBieXRlcyAoMjEwIE1CKSBj b3BpZWQsIDEuNzczMDQgcywgMTE4IE1CL3MNCj4gNjkwMTM4OTA4ZGU1MTZiNmU1ZDdkMTgwZDA4 NWMzZjMgIGhlbGxvDQo+IA0KPiAzMjAwKzAgcmVjb3JkcyBpbg0KPiAzMjAwKzAgcmVjb3JkcyBv dXQNCj4gMjA5NzE1MjAwIGJ5dGVzICgyMTAgTUIpIGNvcGllZCwgMS40MzMxIHMsIDE0NiBNQi9z DQo+IDY5MDEzODkwOGRlNTE2YjZlNWQ3ZDE4MGQwODVjM2YzICBoZWxsbw0KPiANCj4gMTYwMCsw IHJlY29yZHMgaW4NCj4gMTYwMCswIHJlY29yZHMgb3V0DQo+IDIwOTcxNTIwMCBieXRlcyAoMjEw IE1CKSBjb3BpZWQsIDAuOTIyMTY3IHMsIDIyNyBNQi9zDQo+IDY5MDEzODkwOGRlNTE2YjZlNWQ3 ZDE4MGQwODVjM2YzICBoZWxsbw0KPiANCj4gDQo+IC0tDQo+IFRvIHVuc3Vic2NyaWJlIGZyb20g dGhpcyBsaXN0OiBzZW5kIHRoZSBsaW5lICJ1bnN1YnNjcmliZSBsaW51eC1uZnMiIGluDQo+IHRo ZSBib2R5IG9mIGEgbWVzc2FnZSB0byBtYWpvcmRvbW9Admdlci5rZXJuZWwub3JnDQo+IE1vcmUg bWFqb3Jkb21vIGluZm8gYXQgIGh0dHA6Ly92Z2VyLmtlcm5lbC5vcmcvbWFqb3Jkb21vLWluZm8u aHRtbA0KDQotLSANClRyb25kIE15a2xlYnVzdA0KTGludXggTkZTIGNsaWVudCBtYWludGFpbmVy DQoNCk5ldEFwcA0KVHJvbmQuTXlrbGVidXN0QG5ldGFwcC5jb20NCnd3dy5uZXRhcHAuY29tDQoN Cg==