Return-Path: linux-nfs-owner@vger.kernel.org Received: from mx2.netapp.com ([216.240.18.37]:9519 "EHLO mx2.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753785Ab2F0Sgn (ORCPT ); Wed, 27 Jun 2012 14:36:43 -0400 From: "Myklebust, Trond" To: Andi Kleen CC: Fengguang Wu , Linux-NFS Subject: Re: rpcauth_lookup_credcache() lock contentions Date: Wed, 27 Jun 2012 18:36:13 +0000 Message-ID: <1340822172.2398.5.camel@lade.trondhjem.org> References: <20120623122604.GA10887@localhost> <20120624213417.GI4152@tassilo.jf.intel.com> <20120625024211.GA11057@localhost> <20120627180353.GO4152@tassilo.jf.intel.com> In-Reply-To: <20120627180353.GO4152@tassilo.jf.intel.com> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org List-ID: T24gV2VkLCAyMDEyLTA2LTI3IGF0IDExOjAzIC0wNzAwLCBBbmRpIEtsZWVuIHdyb3RlOg0KPiA+ ID4gQ2FuIHlvdSB0cnkgdGhpcyBwYXRjaD8NCj4gPiANCj4gPiBUaGFuayB5b3UhIFRoaXMgcGF0 Y2ggYnJpbmdzICVzeXMgZG93biB0byAyNCUsIGEgcHJldHR5IGxhcmdlIGltcHJvdmVtZW50IQ0K PiANCj4gSSByZWRpZCB0aGUgcGF0Y2ggbm93IGFuZCBmaXhlZCB0aGUgcmFjZSBUcm9uZCBwb2lu dGVkIG91dC4NCj4gDQo+IEZlbmdndWFuZywgY2FuIHlvdSByZXRlc3QgcGxlYXNlPyBUcm9uZCwg ZG9lcyBpdCBsb29rIGdvb2Qgbm93Pw0KDQpIaSBBbmRpLA0KDQpUaGVyZSBpcyBzdGlsbCBhIHJh Y2UgdGhlcmU6IGlmIHlvdXIgdGhyZWFkIGRvZXMgYXRvbWljX2FkZF9yZXR1cm4oKSA9PQ0KMSwg dGhlbiBhIHNlY29uZCB0aHJlYWQgY2FuIHNjYW4sIGRvIHRoZSBhdG9taWNfYWRkX3JldHVybigp IGFuZCBnZXQgYQ0KdmFsdWUgb2YgMiwgaW4gd2hpY2ggY2FzZSBpdCB3b24ndCBjaGVjayBmb3Ig SEFTSEVELi4uDQoNCkNoZWVycw0KICBUcm9uZA0KDQo+IC0tLQ0KPiANCj4gRnJvbTogQW5kaSBL bGVlbiA8YWtAbGludXguaW50ZWwuY29tPg0KPiBEYXRlOiBTdW4sIDI0IEp1biAyMDEyIDE0OjMx OjA2IC0wNzAwDQo+IFN1YmplY3Q6IFtQQVRDSF0gc3VucnBjOiBJbXByb3ZlIHNwaW5sb2NrcyBp biBjcmVkZW50aWFsIGxvb2t1cCBwYXRoIHYyDQo+IA0KPiBGZW5nZ3Vhbmcgbm90aWNlZCB0aGF0 IHJwY2F1dGhfbG9va3VwX2NyZWRjYWNoZSBoYXMgaGlnaCBsb2NrIGNvbnRlbnRpb24NCj4gb24g dGhlIG5mcyBzZXJ2ZXIgd2hlbiBkb2luZyBrZXJuZWwgYnVpbGRzIG9uIG5mc3Jvb3QuDQo+IA0K PiBUaGUgb25seSByZWFzb24gdGhlIHNwaW5sb2NrIGlzIG5lZWRlZCBpbiB0aGUgbG9ja3VwIHBh dGggaXMgdG8NCj4gc3luY2hyb25pemUgd2l0aCB0aGUgZ2FyYmFnZSBjb2xsZWN0b3IuIEZpcnN0 IHRoZSBvYmplY3QgaXRzZWxmDQo+IGlzIHN0YWJsZSBiZWNhdXNlIGl0J3MgUkNVJ2VkLg0KPiAN Cj4gU28gbm93IHdlIHVzZSBhbiBhdG9taWNfYWRkX3JldHVybiBhbmQgY2hlY2sgZm9yIHRoZSAw IHJlZmVyZW5jZQ0KPiBjb3VudCBjYXNlLiAgV2hlbiB0aGUgY291bnQgd2FzIDAgYXNzdW1lIHRo ZSBnYXJiYWdlIGNvbGxlY3Rvcg0KPiBpcyBhY3RpdmUgb24gdGhpcyBlbnRyeSBhbmQgdGFrZSB0 aGUgbG9jayBhbmQgcmVjaGVjay4NCj4gDQo+IE90aGVyd2lzZSB0aGUgcGF0aCBpcyBsb2NrbGVz cy4NCj4gDQo+IHYyOiBBZGQgR0MgcmFjZSBjaGVjayBiYXNlZCBvbiBUcm9uZCdzIGZlZWRiYWNr DQo+IENjOiBUcm9uZC5NeWtsZWJ1c3RAbmV0YXBwLmNvbQ0KPiBSZXBvcnRlZC1ieTogRmVuZ2d1 YW5nIFd1DQo+IFNpZ25lZC1vZmYtYnk6IEFuZGkgS2xlZW4gPGFrQGxpbnV4LmludGVsLmNvbT4N Cj4gLS0tDQo+ICBuZXQvc3VucnBjL2F1dGguYyB8ICAgMTkgKysrKysrKysrKysrKysrLS0tLQ0K PiAgMSBmaWxlcyBjaGFuZ2VkLCAxNSBpbnNlcnRpb25zKCspLCA0IGRlbGV0aW9ucygtKQ0KPiAN Cj4gZGlmZiAtLWdpdCBhL25ldC9zdW5ycGMvYXV0aC5jIGIvbmV0L3N1bnJwYy9hdXRoLmMNCj4g aW5kZXggNzI3ZTUwNi4uNjQ1NzY5ZSAxMDA2NDQNCj4gLS0tIGEvbmV0L3N1bnJwYy9hdXRoLmMN Cj4gKysrIGIvbmV0L3N1bnJwYy9hdXRoLmMNCj4gQEAgLTM2NCwxMyArMzY0LDI0IEBAIHJwY2F1 dGhfbG9va3VwX2NyZWRjYWNoZShzdHJ1Y3QgcnBjX2F1dGggKmF1dGgsIHN0cnVjdCBhdXRoX2Ny ZWQgKiBhY3JlZCwNCj4gIAlobGlzdF9mb3JfZWFjaF9lbnRyeV9yY3UoZW50cnksIHBvcywgJmNh Y2hlLT5oYXNodGFibGVbbnJdLCBjcl9oYXNoKSB7DQo+ICAJCWlmICghZW50cnktPmNyX29wcy0+ Y3JtYXRjaChhY3JlZCwgZW50cnksIGZsYWdzKSkNCj4gIAkJCWNvbnRpbnVlOw0KPiAtCQlzcGlu X2xvY2soJmNhY2hlLT5sb2NrKTsNCj4gIAkJaWYgKHRlc3RfYml0KFJQQ0FVVEhfQ1JFRF9IQVNI RUQsICZlbnRyeS0+Y3JfZmxhZ3MpID09IDApIHsNCj4gLQkJCXNwaW5fdW5sb2NrKCZjYWNoZS0+ bG9jayk7DQo+ICAJCQljb250aW51ZTsNCj4gIAkJfQ0KPiAtCQljcmVkID0gZ2V0X3JwY2NyZWQo ZW50cnkpOw0KPiAtCQlzcGluX3VubG9jaygmY2FjaGUtPmxvY2spOw0KPiArCQljcmVkID0gZW50 cnk7DQo+ICsJCWlmIChhdG9taWNfYWRkX3JldHVybigxLCAmY3JlZC0+Y3JfY291bnQpID09IDEp IHsNCj4gKwkJCS8qDQo+ICsJCQkgKiBXaGVuIHRoZSBjb3VudCB3YXMgMCB3ZSBjb3VsZCByYWNl IHdpdGggdGhlIEdDLg0KPiArCQkJICogVGFrZSB0aGUgbG9jayBhbmQgcmVjaGVjay4NCj4gKwkJ CSAqLw0KPiArCQkJc3Bpbl9sb2NrKCZjYWNoZS0+bG9jayk7DQo+ICsJCQlpZiAoIXRlc3RfYml0 KFJQQ0FVVEhfQ1JFRF9IQVNIRUQsICZlbnRyeS0+Y3JfZmxhZ3MpKSB7DQo+ICsJCQkJLyogTG9z dCB0aGUgcmFjZS4gKi8NCj4gKwkJCQlhdG9taWNfZGVjKCZjcmVkLT5jcl9jb3VudCk7DQo+ICsJ CQkJc3Bpbl91bmxvY2soJmNhY2hlLT5sb2NrKTsNCj4gKwkJCQljb250aW51ZTsNCj4gKwkJCX0N Cj4gKwkJCXNwaW5fdW5sb2NrKCZjYWNoZS0+bG9jayk7DQo+ICsJCX0NCj4gIAkJYnJlYWs7DQo+ ICAJfQ0KPiAgCXJjdV9yZWFkX3VubG9jaygpOw0KDQotLSANClRyb25kIE15a2xlYnVzdA0KTGlu dXggTkZTIGNsaWVudCBtYWludGFpbmVyDQoNCk5ldEFwcA0KVHJvbmQuTXlrbGVidXN0QG5ldGFw cC5jb20NCnd3dy5uZXRhcHAuY29tDQoNCg==