Return-Path: linux-nfs-owner@vger.kernel.org Received: from mx1.netapp.com ([216.240.18.38]:46148 "EHLO mx1.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752302Ab3IEV5Z (ORCPT ); Thu, 5 Sep 2013 17:57:25 -0400 From: "Myklebust, Trond" To: Quentin Barnes CC: "linux-nfs@vger.kernel.org" Subject: Re: nfs-backed mmap file results in 1000s of WRITEs per second Date: Thu, 5 Sep 2013 21:57:24 +0000 Message-ID: <1378418243.5450.29.camel@leira.trondhjem.org> References: <20130905162110.GA17920@gmail.com> <20130905170303.GB17330@us.ibm.com> <20130905191139.GA20830@gmail.com> <1378411320.5450.27.camel@leira.trondhjem.org> <20130905213649.GA21944@gmail.com> In-Reply-To: <20130905213649.GA21944@gmail.com> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org List-ID: T24gVGh1LCAyMDEzLTA5LTA1IGF0IDE2OjM2IC0wNTAwLCBRdWVudGluIEJhcm5lcyB3cm90ZToN Cj4gT24gVGh1LCBTZXAgMDUsIDIwMTMgYXQgMDg6MDI6MDFQTSArMDAwMCwgTXlrbGVidXN0LCBU cm9uZCB3cm90ZToNCj4gPiBPbiBUaHUsIDIwMTMtMDktMDUgYXQgMTQ6MTEgLTA1MDAsIFF1ZW50 aW4gQmFybmVzIHdyb3RlOg0KPiA+ID4gT24gVGh1LCBTZXAgMDUsIDIwMTMgYXQgMTI6MDM6MDNQ TSAtMDUwMCwgTWFsYWhhbCBOYWluZW5pIHdyb3RlOg0KPiA+ID4gPiBOZWlsIEJyb3duIHBvc3Rl ZCBhIHBhdGNoIGNvdXBsZSBkYXlzIGFnbyBmb3IgdGhpcyENCj4gPiA+ID4gDQo+ID4gPiA+IGh0 dHA6Ly90aHJlYWQuZ21hbmUub3JnL2dtYW5lLmxpbnV4Lm5mcy81ODQ3Mw0KPiA+ID4gDQo+ID4g PiBJIHRyaWVkIE5laWwncyBwYXRjaCBvbiBhIHYzLjExIGtlcm5lbC4gIFRoZSByZWJ1aWx0IGtl cm5lbCBzdGlsbA0KPiA+ID4gZXhoaWJpdGVkIHRoZSBzYW1lIDEwMDBzIG9mIFdSSVRFcy9zZWMg cHJvYmxlbS4NCj4gPiA+IA0KPiA+ID4gQW55IG90aGVyIGlkZWFzPw0KPiA+IA0KPiA+IFllcy4g UGxlYXNlIHRyeSB0aGUgYXR0YWNoZWQgcGF0Y2guDQo+IA0KPiBHcmVhdCEgIFRoYXQgZGlkIHRo ZSB0cmljayENCj4gDQo+IERvIHlvdSBmZWVsIHRoaXMgcGF0Y2ggY291bGQgYmUgd29ydGh5IG9m IHB1c2hpbmcgaXQgdXBzdHJlYW0gaW4gaXRzDQo+IGN1cnJlbnQgc3RhdGUgb3Igd2FzIGl0IGp1 c3QgdG8gdmVyaWZ5IGEgdGhlb3J5Pw0KPiANCj4gDQo+IEluIGNvbXBhcmluZyB0aGUgbmZzX2Zs dXNoX2luY29tcGF0aWJsZSgpIGltcGxlbWVudGF0aW9ucyBiZXR3ZWVuDQo+IFJIRUw1IGFuZCB2 My4xMSAod2l0aG91dCB5b3VyIHBhdGNoKSwgdGhlIGd1dHMgb2YgdGhlIGFsZ29yaXRobSBzZWVt DQo+IG1vcmUgb3IgbGVzcyBsb2dpY2FsbHkgZXF1aXZhbGVudCB0byBtZSBvbiB3aGV0aGVyIG9y IG5vdCB0byBmbHVzaA0KPiB0aGUgcGFnZS4gIEFsc28sIHdoZW4gYW5kIHdoZXJlIG5mc19mbHVz aF9pbmNvbXBhdGlibGUoKSBpcyBpbnZva2VkDQo+IHNlZW1zIHRoZSBzYW1lLiAgV291bGQgeW91 IHByb3ZpZGUgYSB2ZXJ5IGJyaWVmIHBvaW50ZXIgdG8gY2x1ZSBtZQ0KPiBpbiBhcyB0byB3aHkg dGhpcyBwcm9ibGVtIGRpZG4ndCBhbHNvIG1hbmlmZXN0IGNpcmNhIDIuNi4xOCBkYXlzPw0KDQpU aGVyZSB3YXMgbm8gbmZzX3ZtX3BhZ2VfbWt3cml0ZSgpIHRvIGhhbmRsZSBwYWdlIGZhdWx0cyBp biB0aGUgMi42LjE4DQpkYXlzLCBhbmQgc28gdGhlIHJpc2sgd2FzIHRoYXQgeW91ciBtbWFwcGVk IHdyaXRlcyBjb3VsZCBlbmQgdXAgYmVpbmcNCnNlbnQgd2l0aCB0aGUgd3JvbmcgY3JlZGVudGlh bHMuDQoNCi0tIA0KVHJvbmQgTXlrbGVidXN0DQpMaW51eCBORlMgY2xpZW50IG1haW50YWluZXIN Cg0KTmV0QXBwDQpUcm9uZC5NeWtsZWJ1c3RAbmV0YXBwLmNvbQ0Kd3d3Lm5ldGFwcC5jb20NCg==