Return-Path: From: Trond Myklebust To: "aweits@rit.edu" CC: bcodding redhat , "anna.schumaker@netapp.com" , "linux-nfs@vger.kernel.org" Subject: Re: [PATCH v8 00/11] Fix OPEN/CLOSE races Date: Tue, 7 Nov 2017 18:35:56 +0000 Message-ID: <1510079753.7834.7.camel@primarydata.com> References: <20171106202811.70202-1-trond.myklebust@primarydata.com> <1510008607.3861.1.camel@primarydata.com> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 List-ID: T24gVHVlLCAyMDE3LTExLTA3IGF0IDExOjU5IC0wNTAwLCBBbmRyZXcgVyBFbGJsZSB3cm90ZToN Cj4gVHJvbmQgTXlrbGVidXN0IDx0cm9uZG15QHByaW1hcnlkYXRhLmNvbT4gd3JpdGVzOg0KPiAN Cj4gPiBPbiBNb24sIDIwMTctMTEtMDYgYXQgMTc6NDYgLTA1MDAsIEFuZHJldyBXIEVsYmxlIHdy b3RlOg0KPiA+ID4gVHJvbmQgTXlrbGVidXN0IDx0cm9uZC5teWtsZWJ1c3RAcHJpbWFyeWRhdGEu Y29tPiB3cml0ZXM6DQo+ID4gPiANCj4gPiA+ID4gdjg6DQo+ID4gPiA+IC0gUmVhbGx5IGZpeCBj b21waWxlIGlzc3VlIHdoZW4gQ09ORklHX05GU19WNF8xPW4NCj4gPiA+ID4gLSBuZnNfaW5vZGVf ZmluZF9zdGF0ZV9hbmRfcmVjb3ZlcigpIHNob3VsZCBhbHNvIHRyeSB0byBtYXRjaA0KPiA+ID4g PiB0aGUNCj4gPiA+ID4gICBvcGVuX3N0YXRlaWQuDQo+ID4gPiANCj4gPiA+IFNlZWluZyBhIGxv dCBvZiBURVNUX1NUQVRFSUQncyBmb3IgdGhlIGludmFsaWQgc3RhdGVpZCBnbyBvdmVyDQo+ID4g PiB0aGUNCj4gPiA+IHdpcmUgLSB0aGlzIGFsc28gbWFrZXMgdGhlIHNlcnZlciBoaXQgdGhpcyBx dWl0ZSBhIGJpdDoNCj4gPiA+IA0KPiA+ID4gcHJfd2Fybl9yYXRlbGltaXRlZCgiTkZTRDogY2xp ZW50ICVzIHRlc3Rpbmcgc3RhdGUgSUQgIg0KPiA+ID4gICAgICAgICAgICAgICAgICAgICAgICAg IndpdGggaW5jb3JyZWN0IGNsaWVudCBJRFxuIiwgYWRkcl9zdHIpOw0KPiA+ID4gDQo+ID4gDQo+ ID4gSSdtIG5vdCBzZWVpbmcgdGhhdCBhdCBhbGwuIENhbiB5b3UgcGxlYXNlIGVsYWJvcmF0ZSBv biB3aGljaA0KPiA+IHNlcnZlcg0KPiA+IGVycm9ycyBhcmUgdHJpZ2dlcmluZyB0aGlzPyBJJ2Qg bm90IGV4cGVjdCB0byBldmVyIHNlZSBURVNUX1NUQVRFSUQNCj4gPiBvbg0KPiA+IGEgbm9ybWFs IHJ1bi4NCj4gDQo+IEhvcGVmdWxseSB0aGlzIGhlbHBzLg0KPiANCj4gTm90IGNvbXBsZXRlbHkg c3VyZSB0aGlzIGlzIGNvcnJlY3QsIGJ1dCB0aGlzIG1ha2VzIHRoZSBjbGllbnQgbm8NCj4gbG9u Z2VyDQo+IHRlc3QgdGhlIF9pbnZhbGlkXyBzdGF0ZWlkOg0KPiANCj4gZGlmZiAtLWdpdCBhL2Zz L25mcy9uZnM0cHJvYy5jIGIvZnMvbmZzL25mczRwcm9jLmMNCj4gaW5kZXggNmVjY2JkMWI5OGNj Li43ZGM5MTRhNjM1NmYgMTAwNjQ0DQo+IC0tLSBhL2ZzL25mcy9uZnM0cHJvYy5jDQo+ICsrKyBi L2ZzL25mcy9uZnM0cHJvYy5jDQo+IEBAIC0xNDM2LDYgKzE0MzYsOCBAQCBzdGF0aWMgdm9pZA0K PiBuZnNfY2xlYXJfb3Blbl9zdGF0ZWlkX2xvY2tlZChzdHJ1Y3QgbmZzNF9zdGF0ZSAqc3RhdGUs DQo+ICAgICAgICAgICAgICAgICBuZnNfcmVzeW5jX29wZW5fc3RhdGVpZF9sb2NrZWQoc3RhdGUp Ow0KPiAgICAgICAgICAgICAgICAgZ290byBvdXQ7DQo+ICAgICAgICAgfQ0KPiArICAgICAgIGlm ICh0ZXN0X2JpdChORlNfT1BFTl9TVEFURSwgJnN0YXRlLT5mbGFncykgPT0gMCkNCj4gKyAgICAg ICAgICAgICAgIHN0YXRlaWQtPnR5cGUgPSBORlM0X0lOVkFMSURfU1RBVEVJRF9UWVBFOw0KPiAg ICAgICAgIGlmICh0ZXN0X2JpdChORlNfREVMRUdBVEVEX1NUQVRFLCAmc3RhdGUtPmZsYWdzKSA9 PSAwKQ0KPiAgICAgICAgICAgICAgICAgbmZzNF9zdGF0ZWlkX2NvcHkoJnN0YXRlLT5zdGF0ZWlk LCBzdGF0ZWlkKTsNCj4gICAgICAgICBuZnM0X3N0YXRlaWRfY29weSgmc3RhdGUtPm9wZW5fc3Rh dGVpZCwgc3RhdGVpZCk7DQo+IA0KPiANCj4gVGhlIFRFU1RfU1RBVEVJRCdzIGFyZSBiZWluZyBp c3N1ZWQgZnJvbSB0aGUgImZyZWVtZSIgcGF0aCBvZg0KPiB1cGRhdGVfb3Blbl9zdGF0ZWlkKCkg dmlhIG5mczRfb3BlbmRhdGFfdG9fbmZzNF9zdGF0ZSgpLiBJIHB1dCBhDQo+IHRyYWNlcG9pbnQN Cj4gdGhlcmU6DQoNCkFoLCBJIHNlZS4gQ2FuIHdlIGluIHRoYXQgY2FzZSBwbGVhc2UgcmF0aGVy IGRvIHRoZSBmb2xsb3dpbmc/DQoNCjg8LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0NCkZyb20gZTNlZDIxYzE5NGY0MjA3Y2YzYTAwYjYyNGZl ODZiOWE5YjE4OGMxMyBNb24gU2VwIDE3IDAwOjAwOjAwIDIwMDENCkZyb206IFRyb25kIE15a2xl YnVzdCA8dHJvbmQubXlrbGVidXN0QHByaW1hcnlkYXRhLmNvbT4NCkRhdGU6IFR1ZSwgNyBOb3Yg MjAxNyAxMzoxMDo0NiAtMDUwMA0KU3ViamVjdDogW1BBVENIIDEvMl0gTkZTdjQ6IG5mc19zZXRf b3Blbl9zdGF0ZWlkIG11c3Qgbm90IHRyaWdnZXIgc3RhdGUNCiByZWNvdmVyeSBmb3IgY2xvc2Vk IHN0YXRlDQoNCkluIG5mc19zZXRfb3Blbl9zdGF0ZWlkX2xvY2tlZCwgd2UgbXVzdCBpZ25vcmUg c3RhdGVpZHMgZnJvbSBjbG9zZWQgc3RhdGUuDQoNClJlcG9ydGVkLWJ5OiBBbmRyZXcgVyBFbGJs ZSA8YXdlaXRzQHJpdC5lZHU+DQpTaWduZWQtb2ZmLWJ5OiBUcm9uZCBNeWtsZWJ1c3QgPHRyb25k Lm15a2xlYnVzdEBwcmltYXJ5ZGF0YS5jb20+DQotLS0NCiBmcy9uZnMvbmZzNHByb2MuYyB8IDMg KystDQogMSBmaWxlIGNoYW5nZWQsIDIgaW5zZXJ0aW9ucygrKSwgMSBkZWxldGlvbigtKQ0KDQpk aWZmIC0tZ2l0IGEvZnMvbmZzL25mczRwcm9jLmMgYi9mcy9uZnMvbmZzNHByb2MuYw0KaW5kZXgg ZDUzNmQ0ZWQ5OTBmLi4wYWE4NDYxZTczNDEgMTAwNjQ0DQotLS0gYS9mcy9uZnMvbmZzNHByb2Mu Yw0KKysrIGIvZnMvbmZzL25mczRwcm9jLmMNCkBAIC0xNTQxLDcgKzE1NDEsOCBAQCBzdGF0aWMg dm9pZCBuZnNfc2V0X29wZW5fc3RhdGVpZF9sb2NrZWQoc3RydWN0IG5mczRfc3RhdGUgKnN0YXRl LA0KIAkJd3JpdGVfc2VxbG9jaygmc3RhdGUtPnNlcWxvY2spOw0KIAl9DQogDQotCWlmICghbmZz NF9zdGF0ZWlkX21hdGNoX290aGVyKHN0YXRlaWQsICZzdGF0ZS0+b3Blbl9zdGF0ZWlkKSkgew0K KwlpZiAodGVzdF9iaXQoTkZTX09QRU5fU1RBVEUsICZzdGF0ZS0+ZmxhZ3MpICYmDQorCSAgICAh bmZzNF9zdGF0ZWlkX21hdGNoX290aGVyKHN0YXRlaWQsICZzdGF0ZS0+b3Blbl9zdGF0ZWlkKSkg ew0KIAkJbmZzNF9zdGF0ZWlkX2NvcHkoZnJlZW1lLCAmc3RhdGUtPm9wZW5fc3RhdGVpZCk7DQog CQluZnNfdGVzdF9hbmRfY2xlYXJfYWxsX29wZW5fc3RhdGVpZChzdGF0ZSk7DQogCX0NCi0tIA0K Mi4xMy42DQoNCi0tIA0KVHJvbmQgTXlrbGVidXN0DQpMaW51eCBORlMgY2xpZW50IG1haW50YWlu ZXIsIFByaW1hcnlEYXRhDQp0cm9uZC5teWtsZWJ1c3RAcHJpbWFyeWRhdGEuY29tDQo=