From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: linux-nfs-owner@vger.kernel.org Received: from mx12.netapp.com ([216.240.18.77]:46876 "EHLO mx12.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758103Ab3HHSVh (ORCPT ); Thu, 8 Aug 2013 14:21:37 -0400 From: "Myklebust, Trond" To: Jeff Layton CC: "linux-nfs@vger.kernel.org" , William Dauchy , Pascal Bouchareine Subject: Re: [PATCH v3] NFS: Fix writeback performance issue on cache invalidation Date: Thu, 8 Aug 2013 18:21:35 +0000 Message-ID: <1375986094.9193.2.camel@leira.trondhjem.org> References: <1375910064-23731-1-git-send-email-Trond.Myklebust@netapp.com> <20130808141130.27cf2b26@tlielax.poochiereds.net> In-Reply-To: <20130808141130.27cf2b26@tlielax.poochiereds.net> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org List-ID: T24gVGh1LCAyMDEzLTA4LTA4IGF0IDE0OjExIC0wNDAwLCBKZWZmIExheXRvbiB3cm90ZToNCj4g T24gV2VkLCA3IEF1ZyAyMDEzIDE3OjE0OjI0IC0wNDAwDQo+IFRyb25kIE15a2xlYnVzdCA8VHJv bmQuTXlrbGVidXN0QG5ldGFwcC5jb20+IHdyb3RlOg0KPiANCj4gPiBJZiBhIGNhY2hlIGludmFs aWRhdGlvbiBpcyB0cmlnZ2VyZWQsIGFuZCB3ZSBoYXBwZW4gdG8gaGF2ZSBhIGxvdCBvZg0KPiA+ IHdyaXRlYmFja3MgY2FjaGVkIGF0IHRoZSB0aW1lLCB0aGVuIHRoZSBjYWxsIHRvIGludmFsaWRh dGVfaW5vZGVfcGFnZXMyKCkNCj4gPiB3aWxsIGVuZCB1cCBjYWxsaW5nIC0+bGF1bmRlcl9wYWdl KCkgb24gZWFjaCBhbmQgZXZlcnkgZGlydHkgcGFnZSBpbiBvcmRlcg0KPiA+IHRvIHN5bmMgaXRz IGNvbnRlbnRzIHRvIGRpc2ssIHRodXMgZGVmZWF0aW5nIHdyaXRlIGNvYWxlc2NpbmcuDQo+ID4g VGhlIGZvbGxvd2luZyBwYXRjaCBlbnN1cmVzIHRoYXQgd2UgdHJ5IHRvIHN5bmMgdGhlIGlub2Rl IHRvIGRpc2sgYmVmb3JlDQo+ID4gY2FsbGluZyBpbnZhbGlkYXRlX2lub2RlX3BhZ2VzMigpIHNv IHRoYXQgd2UgZG8gdGhlIHdyaXRlYmFjayBhcyBlZmZpY2llbnRseQ0KPiA+IGFzIHBvc3NpYmxl Lg0KPiA+IA0KPiA+IFJlcG9ydGVkLWJ5OiBXaWxsaWFtIERhdWNoeSA8d2lsbGlhbUBnYW5kaS5u ZXQ+DQo+ID4gUmVwb3J0ZWQtYnk6IFBhc2NhbCBCb3VjaGFyZWluZSA8cGFzY2FsQGdhbmRpLm5l dD4NCj4gPiBTaWduZWQtb2ZmLWJ5OiBUcm9uZCBNeWtsZWJ1c3QgPFRyb25kLk15a2xlYnVzdEBu ZXRhcHAuY29tPg0KPiA+IFRlc3RlZC1ieTogV2lsbGlhbSBEYXVjaHkgPHdpbGxpYW1AZ2FuZGku bmV0Pg0KPiA+IFJldmlld2VkLWJ5OiBKZWZmIExheXRvbiA8amxheXRvbkByZWRoYXQuY29tPg0K PiA+IC0tLQ0KPiA+IHYyOiBBZGQgY2hlY2sgZm9yIHJlZ3VsYXIgZmlsZSBhcyBwZXIgSmVmZiBM YXl0b24ncyBzdWdnZXN0aW9uLg0KPiA+IHYzOiBNaW5vciBjbGVhbnVwIGFuZCBhZGQgSmVmZiBh cyBhIHJldmlld2VyDQo+ID4gDQo+ID4gIGZzL25mcy9pbm9kZS5jIHwgMTAgKysrKysrKystLQ0K PiA+ICAxIGZpbGUgY2hhbmdlZCwgOCBpbnNlcnRpb25zKCspLCAyIGRlbGV0aW9ucygtKQ0KPiA+ IA0KPiA+IGRpZmYgLS1naXQgYS9mcy9uZnMvaW5vZGUuYyBiL2ZzL25mcy9pbm9kZS5jDQo+ID4g aW5kZXggYWY2ZTgwNi4uM2VhNGY2NCAxMDA2NDQNCj4gPiAtLS0gYS9mcy9uZnMvaW5vZGUuYw0K PiA+ICsrKyBiL2ZzL25mcy9pbm9kZS5jDQo+ID4gQEAgLTk2Myw5ICs5NjMsMTUgQEAgRVhQT1JU X1NZTUJPTF9HUEwobmZzX3JldmFsaWRhdGVfaW5vZGUpOw0KPiA+ICBzdGF0aWMgaW50IG5mc19p bnZhbGlkYXRlX21hcHBpbmcoc3RydWN0IGlub2RlICppbm9kZSwgc3RydWN0IGFkZHJlc3Nfc3Bh Y2UgKm1hcHBpbmcpDQo+ID4gIHsNCj4gPiAgCXN0cnVjdCBuZnNfaW5vZGUgKm5mc2kgPSBORlNf SShpbm9kZSk7DQo+ID4gLQkNCj4gPiArCWludCByZXQ7DQo+ID4gKw0KPiA+ICAJaWYgKG1hcHBp bmctPm5ycGFnZXMgIT0gMCkgew0KPiA+IC0JCWludCByZXQgPSBpbnZhbGlkYXRlX2lub2RlX3Bh Z2VzMihtYXBwaW5nKTsNCj4gPiArCQlpZiAoU19JU1JFRyhpbm9kZS0+aV9tb2RlKSkgew0KPiA+ ICsJCQlyZXQgPSBuZnNfc3luY19tYXBwaW5nKG1hcHBpbmcpOw0KPiA+ICsJCQlpZiAocmV0IDwg MCkNCj4gPiArCQkJCXJldHVybiByZXQ7DQo+ID4gKwkJfQ0KPiA+ICsJCXJldCA9IGludmFsaWRh dGVfaW5vZGVfcGFnZXMyKG1hcHBpbmcpOw0KPiA+ICAJCWlmIChyZXQgPCAwKQ0KPiA+ICAJCQly ZXR1cm4gcmV0Ow0KPiA+ICAJfQ0KPiANCj4gSXQgb2NjdXJzIHRvIG1lIHRoYXQgd2UgaGF2ZSBz ZXZlcmFsIHBsYWNlcyB0aGF0IGNhbGwgbmZzX3N5bmNfbWFwcGluZw0KPiB3aXRob3V0IGNoZWNr aW5nIFNfSVNSRUcuIEFyZSB0aGV5IHBvdGVudGlhbGx5IHByb2JsZW1hdGljPw0KPiANCj4gTWln aHQgaXQgbWFrZSBtb3JlIHNlbnNlIHRvIG1vdmUgdGhlIFNfSVNSRUcgdGVzdCBpbnNpZGUgb2YN Cj4gbmZzX3N5bmNfbWFwcGluZyBhbmQganVzdCBoYXZlIGl0ICJyZXR1cm4gMCIgd2hlbiBpdCdz IG5vdCBhIHJlZ3VsYXINCj4gZmlsZT8NCg0KSSBzZWUgNSBjYWxsZXJzIG9mIG5mc19zeW5jX21h cHBpbmcoKSBhc2lkZSBmcm9tIHRoZSBhYm92ZTogMiBhcmUgaW4gdGhlDQpPX0RJUkVDVCBjb2Rl LCB0aGUgb3RoZXIgMyBhcmUgYWxsIGluIHRoZSBmaWxlIGxvY2tpbmcgY29kZS4gQUZBSUNTLA0K bm9uZSBvZiB0aG9zZSBjYW4gZXZlciBiZSBmZWQgdG8gbm9uLXJlZ3VsYXIgZmlsZXMuDQoNCkFt IEkgbWlzc2luZyBhbnl0aGluZz8NCg0KQ2hlZXJzDQogIFRyb25kDQoNCi0tIA0KVHJvbmQgTXlr bGVidXN0DQpMaW51eCBORlMgY2xpZW50IG1haW50YWluZXINCg0KTmV0QXBwDQpUcm9uZC5NeWts ZWJ1c3RAbmV0YXBwLmNvbQ0Kd3d3Lm5ldGFwcC5jb20NCg==