Return-Path: From: Trond Myklebust To: Coddington Benjamin CC: "hch@infradead.org" , List Linux Subject: Re: [PATCH v4 24/28] Getattr doesn't require data sync semantics Date: Thu, 21 Jul 2016 13:20:14 +0000 Message-ID: <8B8BB73D-39A6-4291-A10E-736B0F907459@primarydata.com> References: <1467844205-76852-23-git-send-email-trond.myklebust@primarydata.com> <1467844205-76852-24-git-send-email-trond.myklebust@primarydata.com> <1467844205-76852-25-git-send-email-trond.myklebust@primarydata.com> <20160718034847.GA1195@infradead.org> <1468817945.5273.2.camel@primarydata.com> <20160719035843.GA24437@infradead.org> <20160721082216.GA15247@infradead.org> <9E2543EF-0442-491E-AB22-3E1667DABBA4@redhat.com> <70375D08-FCA9-4C73-9991-38490C11B171@redhat.com> In-Reply-To: <70375D08-FCA9-4C73-9991-38490C11B171@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 List-ID: DQo+IE9uIEp1bCAyMSwgMjAxNiwgYXQgMDk6MDUsIEJlbmphbWluIENvZGRpbmd0b24gPGJjb2Rk aW5nQHJlZGhhdC5jb20+IHdyb3RlOg0KPiANCj4gU28gYmFjayB0byBDaHJpc3RvcGgncyBwb2lu dCBlYXJsaWVyOg0KPiANCj4gT24gMTcgSnVsIDIwMTYsIGF0IDIzOjQ4LCBDaHJpc3RvcGggSGVs bHdpZyB3cm90ZToNCj4+IFRoaXMgb25lIGJyZWFrcyB4ZnN0ZXN0cyBnZW5lcmljLzIwNyBvbiBi bG9jay9zY3NpIGxheW91dCBmb3IgbWUuICBUaGUNCj4+IHJlYXNvbiBmb3IgdGhhdCBpcyB0aGF0 IHdlIG5lZWQgYSBsYXlvdXRjb21taXQgYWZ0ZXIgd3JpdGluZyBvdXQgYWxsDQo+PiBkYXRhIGZv ciB0aGUgZmlsZSBmb3IgdGhlIGZpbGUgc2l6ZSB0byBiZSB1cGRhdGVkIG9uIHRoZSBzZXJ2ZXIu DQo+IA0KPiBZb3UgcmVzcG9uZGVkOg0KPiANCj4gT24gMTggSnVsIDIwMTYsIGF0IDA6MzIsIFRy b25kIE15a2xlYnVzdCB3cm90ZToNCj4+IEnigJltIG5vdCB1bmRlcnN0YW5kaW5nIHRoaXMgYXJn dW1lbnQuIFdoeSBkbyB3ZSBjYXJlIGlmIHRoZSBmaWxlIHNpemUgaXMgdXANCj4+IHRvIGRhdGUg b24gdGhlIHNlcnZlciBpZiB3ZeKAmXJlIG5vdCBzZW5kaW5nIGFuIGFjdHVhbCBHRVRBVFRSIG9u IHRoZSB3aXJlDQo+PiB0byByZXRyaWV2ZSB0aGUgZmlsZSBzaXplPw0KPiANCj4gSSBndWVzcyB0 aGUgYW5zd2VyIG1pZ2h0IGJlIGJlY2F1c2Ugd2UgY2FuIGdldCBpdCBiYWNrIGZyb20gdGhlIGxh c3QNCj4gTEFZT1VUQ09NTUlULg0KPiANCg0KVGhlIHBhdGNoIHRoYXQgSSBmb2xsb3dlZCB1cCB3 aXRoIHNob3VsZCBub3cgZW5zdXJlIHRoYXQgd2UgZG8gbm90IG1hcmsgdGhlIGF0dHJpYnV0ZSBj YWNoZSBhcyB1cCB0byBkYXRlIGlmIHRoZXJlIGlzIGEgTEFZT1VUQ09NTUlUIHBlbmRpbmcuDQpJ T1c6IHdoZW4gdGhlIHBORlMgd3JpdGUgaXMgZG9uZSwgaXQgaXMgZXhwZWN0ZWQgdG8gZG8gMiB0 aGluZ3M6DQoNCjEpIG1hcmsgdGhlIGlub2RlIGZvciBMQVlPVVRDT01NSVQNCjIpIG1hcmsgdGhl IGF0dHJpYnV0ZSBjYWNoZSBhcyBpbnZhbGlkIChiZWNhdXNlIHdlIGtub3cgdGhlIGNoYW5nZSBh dHRyaWJ1dGUsIG10aW1lLCBjdGltZSBuZWVkIHRvIGJlIHVwZGF0ZXMpDQoNCkluIHRoZSBjYXNl IG9mIGJsb2NrcyBwTkZTIHdyaXRlOg0KVGhlIGNhbGwgdG8gcG5mc19zZXRfbGF5b3V0Y29tbWl0 KCkgaW4gcG5mc19sZF93cml0ZV9kb25lKCkgc2hvdWxkIHRha2UgY2FyZSBvZiAoMSkNClRoZSBj YWxsIHRvIG5mc193cml0ZWJhY2tfdXBkYXRlX2lub2RlKCkgaW4gbmZzNF93cml0ZV9kb25lX2Ni KCkgc2hvdWxkIHRha2UgY2FyZSBvZiAoMikuDQoNClByb3ZpZGVkIHRoYXQgdGhlc2UgMiBjYWxs cyBhcmUgcGVyZm9ybWVkIGluIHRoZSBhYm92ZSBvcmRlciwgdGhlbiBhbnkgY2FsbCB0byBuZnNf Z2V0YXR0cigpIHdoaWNoIGhhcyBub3QgYmVlbiBwcmVjZWRlZCBieSBhIGNhbGwgdG8gbmZzNF9w cm9jX2xheW91dGNvbW1pdCgpIHNob3VsZCB0cmlnZ2VyIHRoZSBjYWxsIHRvIF9fbmZzX3JldmFs aWRhdGVfaW5vZGUoKS4NCg0KPiBUaGlzIHRlc3QgaGFzIHJlcGVhdGVkIGFwcGVuZGluZyA0ayBh bmQgaGFzIHRoaXMgcGF0dGVybiBvbiB0aGUgd2lyZToNCj4gDQo+IE5GUyAzMzQgVjQgQ2FsbCBM QVlPVVRHRVQNCj4gTkZTIDI5MCBWNCBSZXBseSAoQ2FsbCBJbiA4NTQpIExBWU9VVENPTU1JVA0K PiBORlMgMjk0IFY0IENhbGwgR0VUQVRUUiBGSDogMHg0ZjU1MjhiMA0KPiBORlMgNDQyIFY0IFJl cGx5IChDYWxsIEluIDg1OCkgR0VUQVRUUg0KPiBORlMgMzc0IFY0IENhbGwgTEFZT1VUQ09NTUlU DQo+IE5GUyAzMTQgVjQgUmVwbHkgKENhbGwgSW4gODU2KSBMQVlPVVRHRVQNCj4gTkZTIDMzNCBW NCBDYWxsIExBWU9VVEdFVA0KPiBORlMgMjkwIFY0IFJlcGx5IChDYWxsIEluIDg2MCkgTEFZT1VU Q09NTUlUDQo+IE5GUyAyOTQgVjQgQ2FsbCBHRVRBVFRSIEZIOiAweDRmNTUyOGIwDQo+IE5GUyA0 NDIgVjQgUmVwbHkgKENhbGwgSW4gODY0KSBHRVRBVFRSDQo+IE5GUyAzNzQgVjQgQ2FsbCBMQVlP VVRDT01NSVQNCj4gTkZTIDMxNCBWNCBSZXBseSAoQ2FsbCBJbiA4NjIpIExBWU9VVEdFVA0KPiBO RlMgMzM0IFY0IENhbGwgTEFZT1VUR0VUDQo+IE5GUyAyOTAgVjQgUmVwbHkgKENhbGwgSW4gODY2 KSBMQVlPVVRDT01NSVQNCj4gTkZTIDI5NCBWNCBDYWxsIEdFVEFUVFIgRkg6IDB4NGY1NTI4YjAN Cj4gTkZTIDQ0MiBWNCBSZXBseSAoQ2FsbCBJbiA4NzApIEdFVEFUVFINCj4gTkZTIDMxNCBWNCBS ZXBseSAoQ2FsbCBJbiA4NjgpIExBWU9VVEdFVA0KPiBORlMgMzc0IFY0IENhbGwgTEFZT1VUQ09N TUlUDQo+IE5GUyAyOTAgVjQgUmVwbHkgKENhbGwgSW4gODc0KSBMQVlPVVRDT01NSVQNCj4gTkZT IDMxNCBWNCBDYWxsIENMT1NFIFN0YXRlSUQ6IDB4NTRkOQ0KPiBORlMgMjk0IFY0IFJlcGx5IChD YWxsIEluIDg3NikgQ0xPU0UNCj4gDQo+IFRoYXQgbGFzdCBMQVlPVVRDT01NSVQgYW5kIHRoZSBD TE9TRSBoYXZlIHRoZSBzaXplIHdlIHdhbnQuICBUaGUgcHJldmlvdXMNCj4gR0VUQVRUUiBpcyA0 ayBzaG9ydC4NCg0KV2hlbiB5b3Ugc2F5IOKAnDRrIHNob3J04oCdLCBkbyB5b3UgbWVhbiB0aGF0 IGl0IGRpZmZlcnMgZnJvbSB0aGUgdmFsdWUgcmV0dXJuZWQgYnkgdGhlIExBWU9VVENPTU1JVCB0 aGF0IGltbWVkaWF0ZWx5IHByZWNlZGVzIGl0PyBJdCBsb29rcyBhcyBpZiB0aGVyZSBpcyBhIExB WU9VVEdFVCBpbW1lZGlhdGVseSBmb2xsb3dpbmcgaXQsIHNvIHByZXN1bWFibHkgdGhlIHdyaXRl cyBoYXZlIG5vdCBhbGwgY29tcGxldGVkIHlldC4NCg0KQ2hlZXJzDQogIFRyb25kDQoNCg==