From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Liuweni" Subject: Re: [PATCH 1/3]fs/inode: iunique() Optimize Performance Date: Wed, 25 Nov 2009 22:51:33 +0800 Message-ID: <200911252251305001347@gmail.com> References: <200911252209432039291@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 Cc: "viro" , "akpm" , "jack" , "npiggin" , "linux-fsdevel" , "linux-kernel" , "strongzgy" , "xgr178" , "Liu Hui" To: "Matthew Wilcox" Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org SGkgIE1hdHRoZXcgV2lsY294ICwNCiAgICBUaGUgY29kZSBtZWFucyBzZXQgY291bnRlcidzIHZh bHVlIHRvIHRoZSBtYXggbWF4X3Jlc2VydmVkIGFuZCBjb3VudGVyLg0KVGhlbiwgdGhlIGlmIGNv bmRpdGlvbiB3aWxsIGNob29zZSBhIGxhcmdlIG9uZSwgYW5kIGluIHRoZSBmdW5jdGlvbiwgdGhl IGNvdW50ZXINCmlzIGluY3JlYXNlZC4gc28gdGhpcyBjb2RlIHdvbid0IGNoYW5nZSB0aGUgZnVu Y3Rpb24gb2YgaXVuaXF1ZSgpLg0KDQo+ICsgaWYgKGNvdW50ZXIgPD0gbWF4X3Jlc2VydmVkKQ0K PiArIGNvdW50ZXIgPSBtYXhfcmVzZXJ2ZWQgKyAxOw0KDQoNCi0tLS0tLS0tLS0tDQpCZXN0IFJl Z2FyZHMsDQpMaXV3ZW5pIA0KMjAwOS0xMS0yNSANCg0KDQoNCg0KDQoNCg0Kt6K8/sjLo7ogTWF0 dGhldyBXaWxjb3ggDQq3osvNyrG85KO6IDIwMDktMTEtMjUgIDIyOjE1OjA5IA0KytW8/sjLo7og TGl1d2VuaSANCrOty82juiBsaW51eC1rZXJuZWw7IHN0cm9uZ3pneTsgeGdyMTc4OyBMaXUgSHVp OyB2aXJvOyBha3BtOyBqYWNrOyBucGlnZ2luOyBsaW51eC1mc2RldmVsIA0K1vfM4qO6IFJlOiBb UEFUQ0ggMS8zXWZzL2lub2RlOiBpdW5pcXVlKCkgT3B0aW1pemUgUGVyZm9ybWFuY2UgDQogDQpP biBXZWQsIE5vdiAyNSwgMjAwOSBhdCAxMDowOTo0NVBNICswODAwLCBMaXV3ZW5pIHdyb3RlOg0K PiAtLS0NCj4gbW92ZSB0aGUgaWYgY29uZGl0aW9uIG91dCB0aGUgd2hpbGV7fS4NCj4gV2hpbGUg dGhlIGZ1bmN0aW9uIGV4ZWN1dGluZywgdGhlIGlmIA0KPiBjb25kaXRpb24gd29uJ3QgY2hlY2sg YWdhaW4gYW5kIGFnYWluLg0KPiBBbmQgdGhpcyBjb2RlIHdvbid0IGNoYW5nZSB0aGUgZnVuY3Rp b24NCj4gb2YgaXVuaXF1ZSgpLg0KVGhhdCdzIG5vdCB0cnVlLg0KPiBAQCAtODM4LDkgKzgzOCwx MCBAQCBpbm9fdCBpdW5pcXVlKHN0cnVjdCBzdXBlcl9ibG9jayAqc2IsIGlub190IG1heF9yZXNl cnZlZCkNCj4gICBpbm9fdCByZXM7DQo+ICANCj4gICBzcGluX2xvY2soJmlub2RlX2xvY2spOw0K PiArDQo+ICsgaWYgKGNvdW50ZXIgPD0gbWF4X3Jlc2VydmVkKQ0KPiArIGNvdW50ZXIgPSBtYXhf cmVzZXJ2ZWQgKyAxOw0KPiAgIGRvIHsNCj4gLSBpZiAoY291bnRlciA8PSBtYXhfcmVzZXJ2ZWQp DQo+IC0gY291bnRlciA9IG1heF9yZXNlcnZlZCArIDE7DQo+ICAgcmVzID0gY291bnRlcisrOw0K J2NvdW50ZXInIGlzIGluY3JlbWVudGVkIGhlcmUsIHNvIGlmIGl0IHdyYXBzIGFyb3VuZCwgd2Un bGwgYmx1bmRlciBpbnRvIA0KdGhlIHJlc2VydmVkIHNwYWNlIGFnYWluLg0KPiAgIGhlYWQgPSBp bm9kZV9oYXNodGFibGUgKyBoYXNoKHNiLCByZXMpOw0KPiAgIGlub2RlID0gZmluZF9pbm9kZV9m YXN0KHNiLCBoZWFkLCByZXMpOw0KPiANCj4gICANCj4gLS0tLS0tLS0tLS0tLS0NCj4gQmVzdCBS ZWdhcmRzLA0KPiBMaXV3ZW5pDQo+IDIwMDktMTEtMjUNCj4gDQo+IC0tDQo+IFRvIHVuc3Vic2Ny aWJlIGZyb20gdGhpcyBsaXN0OiBzZW5kIHRoZSBsaW5lICJ1bnN1YnNjcmliZSBsaW51eC1mc2Rl dmVsIiBpbg0KPiB0aGUgYm9keSBvZiBhIG1lc3NhZ2UgdG8gbWFqb3Jkb21vQHZnZXIua2VybmVs Lm9yZw0KPiBNb3JlIG1ham9yZG9tbyBpbmZvIGF0ICBodHRwOi8vdmdlci5rZXJuZWwub3JnL21h am9yZG9tby1pbmZvLmh0bWwNCi0tIA0KTWF0dGhldyBXaWxjb3ggSW50ZWwgT3BlbiBTb3VyY2Ug VGVjaG5vbG9neSBDZW50cmUNCiJCaWxsLCBsb29rLCB3ZSB1bmRlcnN0YW5kIHRoYXQgeW91J3Jl IGludGVyZXN0ZWQgaW4gc2VsbGluZyB1cyB0aGlzDQpvcGVyYXRpbmcgc3lzdGVtLCBidXQgY29t cGFyZSBpdCB0byBvdXJzLiAgV2UgY2FuJ3QgcG9zc2libHkgdGFrZSBzdWNoDQphIHJldHJvZ3Jh ZGUgc3RlcC4iDQo=