Return-Path: linux-nfs-owner@vger.kernel.org Received: from mx2.netapp.com ([216.240.18.37]:23648 "EHLO mx2.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750908Ab2FYBVr (ORCPT ); Sun, 24 Jun 2012 21:21:47 -0400 From: "Myklebust, Trond" To: Andi Kleen CC: Fengguang Wu , Linux-NFS Subject: Re: rpcauth_lookup_credcache() lock contentions Date: Mon, 25 Jun 2012 01:21:28 +0000 Message-ID: <1340587274.8758.11.camel@lade.trondhjem.org> References: <20120623122604.GA10887@localhost> <20120624213417.GI4152@tassilo.jf.intel.com> In-Reply-To: <20120624213417.GI4152@tassilo.jf.intel.com> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org List-ID: T24gU3VuLCAyMDEyLTA2LTI0IGF0IDE0OjM0IC0wNzAwLCBBbmRpIEtsZWVuIHdyb3RlOg0KPiBP biBTYXQsIEp1biAyMywgMjAxMiBhdCAwODoyNjowNFBNICswODAwLCBGZW5nZ3VhbmcgV3Ugd3Jv dGU6DQo+ID4gSGksDQo+ID4gDQo+ID4gV2hlbiBkb2luZyBwYXJhbGxlbCBrZXJuZWwgYnVpbGRz IG9uIGFuIE5GU1JPT1Qgc3lzdGVtIHdpdGggMzIgbG9naWNhbA0KPiA+IENQVXMsIEkgc2VlIGhh bGYgQ1BVIHRpbWUgc3BlbnQgaW4ga2VybmVsOg0KPiA+IA0KPiA+IHRvcCAtIDIwOjA4OjI4IHVw ICA1OjAxLCAgOCB1c2VycywgIGxvYWQgYXZlcmFnZTogNjIuOTcsIDU1LjgyLCA1NC41Ng0KPiA+ IFRhc2tzOiA3NTEgdG90YWwsICA4MCBydW5uaW5nLCA2NzEgc2xlZXBpbmcsICAgMCBzdG9wcGVk LCAgIDAgem9tYmllDQo+ID4gQ3B1KHMpOiAgMC4xJXVzLCA1My41JXN5LCA0Ni40JW5pLCAgMC4w JWlkLCAgMC4wJXdhLCAgMC4wJWhpLCAgMC4xJXNpLCAgMC4wJXN0DQo+ID4gTWVtOiAgNjU0MDEx MzJrIHRvdGFsLCAzNjQ1NTYwNGsgdXNlZCwgMjg5NDU1MjhrIGZyZWUsICAgICAgICAwayBidWZm ZXJzDQo+ID4gU3dhcDogICAgICAgIDBrIHRvdGFsLCAgICAgICAgMGsgdXNlZCwgICAgICAgIDBr IGZyZWUsIDMxODU4MjQ0ayBjYWNoZWQNCj4gPiANCj4gPiBUaGUgYXR0YWNoZWQgbG9ja19zdGF0 IHNob3dzIHRoYXQgcnBjYXV0aF9sb29rdXBfY3JlZGNhY2hlKCkgaGFzIHRoZQ0KPiA+IG91dHN0 YW5kaW5nIGNvbnRlbnRpb25zLg0KPiANCj4gSG1tLCB0aGUgY2FjaGUgaXMgYWxyZWFkeSB1c2lu ZyBSQ1UgZm9yIHRoZSByZWFkIGNhc2UsIGp1c3QgdGFrZXMNCj4gYSBsb2NrIGZvciB3cml0aW5n LiBPciB3aGVuIGNoZWNraW5nIGFuIGVudHJ5Lg0KPiANCj4gU28geW91IGVpdGhlciBoYXZlIGEg bG90IG9mIGxvb2t1cHMgb24gdGhlIHNhbWUgZW50cnksIG9yIHlvdSB0aHJhc2gNCj4gdGhlIGNh Y2hlLg0KPiANCj4gV2hlbiB5b3UgbG9vayB1cCB0aGUgbG9vayBhZGRyZXNzLCBpcyBpdCB0aGUg b25lIGluIHRoZSBmaXJzdCBsb29wPw0KPiBJZiB5ZXMgdGhlbiBpdCdzIHRoZSBmaXJzdC4NCj4g DQo+IEknbSBub3QgZnVsbHkgc3VyZSB3aHkgaXQgdGFrZXMgdGhlIGxvY2sgaW4gdGhlIHJlYWQg Y2FzZSBhbnl3YXlzLiBOZWl0aGVyDQo+IHRlc3RfYml0IG5vciBhdG9taWNfaW5jIHVuZGVyIFJD VSBzaG91bGQgbmVlZCBhIGxvY2ssIHNvIEkgc3VwcG9zZQ0KPiBpdCBjYW4gYmUganVzdCByZW1v dmVkLg0KPiANCj4gMzY3ICAgICAgICAgICAgICAgICBzcGluX2xvY2soJmNhY2hlLT5sb2NrKTsN Cj4gMzY4ICAgICAgICAgICAgICAgICBpZiAodGVzdF9iaXQoUlBDQVVUSF9DUkVEX0hBU0hFRCwg JmVudHJ5LT5jcl9mbGFncykgPT0gMCkgew0KPiAzNjkgICAgICAgICAgICAgICAgICAgICAgICAg c3Bpbl91bmxvY2soJmNhY2hlLT5sb2NrKTsNCj4gMzcwICAgICAgICAgICAgICAgICAgICAgICAg IGNvbnRpbnVlOw0KPiAzNzEgICAgICAgICAgICAgICAgIH0NCj4gMzcyICAgICAgICAgICAgICAg ICBjcmVkID0gZ2V0X3JwY2NyZWQoZW50cnkpOw0KPiAzNzMgICAgICAgICAgICAgICAgIHNwaW5f dW5sb2NrKCZjYWNoZS0+bG9jayk7DQoNCkhpIEFuZGksDQoNCkkgYmVsaWV2ZSB0aGF0IHRoZSBz cGlubG9jayBpcyB0aGVyZSBpbiBvcmRlciB0byBlbnN1cmUgdGhhdCB0aGUNCnRlc3RfYml0KCkg YW5kIGdldF9ycGNjcmVkKCkgYXJlIGF0b21pYyB3LnIudC4gZ2FyYmFnZSBjb2xsZWN0aW9uLg0K DQpXaGF0IHdlIGNvdWxkIHBlcmhhcHMgZG8gaXMgY3JlYXRlIGEgbG9jay1sZXNzIGZhc3QgcGF0 aC4gRm9yIGluc3RhbmNlDQp1c2UgYXRvbWljX2luY191bmxlc3NfemVybyB0byBncmFiIGEgcmVm ZXJlbmNlIGluIGNhc2VzIHdoZXJlIHdlIGtub3cNCnRoYXQgdGhlIGdhcmJhZ2UgY29sbGVjdG9y IGNhbid0IGFjdCBvbiB0aGlzIGNyZWQuIFdlJ2Qgc3RpbGwgbmVlZCB0bw0KdGVzdCBmb3IgUlBD QVVUSF9DUkVEX0hBU0hFRCwgYnV0IHNpbmNlIHdlJ2QgYmUgaG9sZGluZyBhIHJlZmVyZW5jZSB3 ZQ0KY291bGQgZG8gdGhhdCBvdXRzaWRlIHRoZSBsb2NrLi4uDQoNCkNoZWVycw0KICBUcm9uZA0K LS0gDQpUcm9uZCBNeWtsZWJ1c3QNCkxpbnV4IE5GUyBjbGllbnQgbWFpbnRhaW5lcg0KDQpOZXRB cHANClRyb25kLk15a2xlYnVzdEBuZXRhcHAuY29tDQp3d3cubmV0YXBwLmNvbQ0KDQo=