From mboxrd@z Thu Jan 1 00:00:00 1970 From: majianpeng Subject: Re: Re: [PATCH 2/2] raid5: For write performance, remove REQ_SYNC when write was odirect. Date: Mon, 16 Jul 2012 13:47:49 +0800 Message-ID: <201207161347445466123@gmail.com> References: <201207160931507187344@gmail.com>, <20120716154010.0ef12c57@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 Cc: viro , linux-raid , linux-fsdevel To: "Neil Brown" Return-path: Received: from mail-pb0-f46.google.com ([209.85.160.46]:50687 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750769Ab2GPFqr (ORCPT ); Mon, 16 Jul 2012 01:46:47 -0400 Sender: linux-fsdevel-owner@vger.kernel.org List-ID: T24gMjAxMi0wNy0xNiAxMzo0MCBOZWlsQnJvd24gPG5laWxiQHN1c2UuZGU+IFdyb3RlOg0KPk9u IE1vbiwgMTYgSnVsIDIwMTIgMDk6MzE6NTUgKzA4MDAgbWFqaWFucGVuZyA8bWFqaWFucGVuZ0Bn bWFpbC5jb20+IHdyb3RlOg0KPg0KPj4gSW4gY29tbWl0IGU5Yzc0NjliYjRmNTAyZGFmYzA5MjE2 NjIwMWJlYTFhZDVmYzBmYmY6DQo+PiBUZWp1biBIZW8gaW50cm9kdWNlZCAiaW1wbG1lbnQgUkVR X0ZMVVNIL0ZVQSBzdXBwb3J0Ii4NCj4+IEJ1dCBmb3IgZGlyZWN0LXdyaXRlLWJsb2NrcywgaXQg bWF5YmUgZm9yIG90aGVyIHB1cnBvc2Ugd2hpY2ggbGlrZSB0aGUNCj4+IHJlZ3VsYXIgZmlsZS4N Cj4+IEFuZCB0aGlzIGZsYWcgd2lsbCBzZXQgU1RSSVBFX1BSRVJFQURfQUNUSVZFIHdoaWNoIGRl Y3JlYWVkIHRoZSBjaGFuZ2UNCj4+IHRvIGZ1bGwgd3JpdGUuDQo+PiANCj4+IEJ1dCB0aGlzIHBh dGNoIHJlbW92ZSBSRVFfU1lOQyBvbmx5IGp1ZGdpbmcgdGhlIFdSSVRFX09ESVJFQ1QsaXQgd2ls bA0KPj4gY29udGFpbCByZWd1bGFyIGZpbGUuU28gaXQgbWF5YmUgbm90IGNvcnJlY3RseS4NCj4+ IEhvdyBjYW4gZGlmZmVyZW5jZSBvZHJpZWN0X3dyaXRlIGJldHdlZW4gcmVndWxhciBmaWxlIG9y IGJsb2NrIGZpbGU/DQo+DQo+SGksDQo+IEkgdGhpbmsgeW91IGFyZSBzYXlpbmcgdGhlIHdoZW4g UkVRX1NZTkMgaXMgdXNlZCB3aXRoIE9fRElSRUNUIHdyaXRlcyBpdCBpcw0KPiBoYXZpbmcgYSBu ZWdhdGl2ZSBlZmZlY3Qgb24gdGhyb3VnaHB1dCBiZWNhdXNlIGl0IGFsbG93cyB0aGUgc3RyaXBl IHRvIGJlDQo+IHByb2Nlc3NlZCBpbW1lZGlhdGVseSB3aXRob3V0IHdhaXRpbmcgZm9yIG1vcmUg cmVxdWVzdHMgdG8gYmUgYWRkZWQgdG8gdGhlDQo+IHN0cmlwZS4NCj4NCj4gTm9ybWFsICdzeW5j JyByZXF1ZXN0cyB1c2UgV1JJVEVfU1lOQyB3aGljaCBpbmNsdWRlcyAiUkVRX05PSURMRSIgd2hp Y2ggbWVhbnMNCj4gICAvKiBkb24ndCBhbnRpY2lwYXRlIG1vcmUgSU8gYWZ0ZXIgdGhpcyBvbmUg Ki8NCj4gT19ESVJFQ1QgcmVxdWVzdCB1c2UgV1JJVEVfT0RJUkVDVCB3aGljaCBkb2VzIG5vdCBp bmNsdWRlIHRoaXMgZmxhZy4NCj4NCj4gU28gbWF5YmUgd2Ugc2hvdWxkIHNpbXBseSBjaGFuZ2Ug cmFpZDUgdG8gb25seSBzZXQgU1RSSVBFX1BSRVJFQURfQUNUSVZFIGlmDQo+IFJFUV9OT0lETEUg aXMgc2V0IG9uIHRoZSBiaW8uICBJIHRoaW5rIHRoaXMgd291bGQgaGF2ZSB0aGUgc2FtZSBlZmZl Y3QgYXMNCj4gd2hhdCB5b3UgYXJlIHRyeWluZyB0byBhY2hpZXZlLg0KPg0KWWVzLCB0aGFua3Mu IG15IG9iamVjdCBpcyB0byBzby5CdXQgaSBkaWRuJ3Qgbm90aWNlIHRoZSBSRVFfTk9JRExFIHNv IGkgdXNlZCB0aGUgUkVRX0ZMQUcuDQpJJ2xsIHRlc3RlZCBhbmQgcmVzZW5kIHRoZSBwYXRjaC4N Cj4gQ291bGQgeW91IHBsZWFzZSB0cnkgdGhhdCBhbmQgc2VlIGlmIGl0IGhhcyB0aGUgZGVzaXJl ZCBlZmZlY3Qgb24NCj4gcGVyZm9ybWFuY2U/DQo+DQo+VGhhbmtzLA0KPk5laWxCcm93bg0KPg0K PmkuZS4gc29tZXRoaW5nIGxpa2UgdGhpczoNCj4NCj5kaWZmIC0tZ2l0IGEvZHJpdmVycy9tZC9y YWlkNS5jIGIvZHJpdmVycy9tZC9yYWlkNS5jDQo+aW5kZXggZDU2ZDc0ZC4uMmQ3MmE1NyAxMDA2 NDQNCj4tLS0gYS9kcml2ZXJzL21kL3JhaWQ1LmMNCj4rKysgYi9kcml2ZXJzL21kL3JhaWQ1LmMN Cj5AQCAtNDE3OCw3ICs0MTc4LDcgQEAgc3RhdGljIHZvaWQgbWFrZV9yZXF1ZXN0KHN0cnVjdCBt ZGRldiAqbWRkZXYsIHN0cnVjdCBiaW8gKiBiaSkNCj4gCQkJZmluaXNoX3dhaXQoJmNvbmYtPndh aXRfZm9yX292ZXJsYXAsICZ3KTsNCj4gCQkJc2V0X2JpdChTVFJJUEVfSEFORExFLCAmc2gtPnN0 YXRlKTsNCj4gCQkJY2xlYXJfYml0KFNUUklQRV9ERUxBWUVELCAmc2gtPnN0YXRlKTsNCj4tCQkJ aWYgKChiaS0+YmlfcncgJiBSRVFfU1lOQykgJiYNCj4rCQkJaWYgKChiaS0+YmlfcncgJiBSRVFf Tk9JRExFKSAmJg0KPiAJCQkgICAgIXRlc3RfYW5kX3NldF9iaXQoU1RSSVBFX1BSRVJFQURfQUNU SVZFLCAmc2gtPnN0YXRlKSkNCj4gCQkJCWF0b21pY19pbmMoJmNvbmYtPnByZXJlYWRfYWN0aXZl X3N0cmlwZXMpOw0KPiAJCQlyZWxlYXNlX3N0cmlwZV9wbHVnKG1kZGV2LCBzaCk7DQo+DQo+DQo+ PiANCj4+IFNpZ25lZC1vZmYtYnk6IEppYW5wZW5nIE1hIDxtYWppYW5wZW5nQGdtYWlsLmNvbT4N Cj4+IC0tLQ0KPj4gIGRyaXZlcnMvbWQvcmFpZDUuYyB8ICAgIDMgKysrDQo+PiAgMSBmaWxlcyBj aGFuZ2VkLCAzIGluc2VydGlvbnMoKyksIDAgZGVsZXRpb25zKC0pDQo+PiANCj4+IGRpZmYgLS1n aXQgYS9kcml2ZXJzL21kL3JhaWQ1LmMgYi9kcml2ZXJzL21kL3JhaWQ1LmMNCj4+IGluZGV4IDA0 MzQ4ZDcuLjhkMmQ0ZDEgMTAwNjQ0DQo+PiAtLS0gYS9kcml2ZXJzL21kL3JhaWQ1LmMNCj4+ICsr KyBiL2RyaXZlcnMvbWQvcmFpZDUuYw0KPj4gQEAgLTQwMTAsNiArNDAxMCw5IEBAIHN0YXRpYyB2 b2lkIG1ha2VfcmVxdWVzdChzdHJ1Y3QgbWRkZXYgKm1kZGV2LCBzdHJ1Y3QgYmlvICogYmkpDQo+ PiAgCSAgICAgY2h1bmtfYWxpZ25lZF9yZWFkKG1kZGV2LGJpKSkNCj4+ICAJCXJldHVybjsNCj4+ ICANCj4+ICsJaWYgKGJpLT5iaV9ydyAmIFdSSVRFX09ESVJFQ1QpDQo+PiArCQliaS0+Ymlfcncg Jj0gflJFUV9TWU5DOw0KPj4gKw0KPj4gIAlsb2dpY2FsX3NlY3RvciA9IGJpLT5iaV9zZWN0b3Ig JiB+KChzZWN0b3JfdClTVFJJUEVfU0VDVE9SUy0xKTsNCj4+ICAJbGFzdF9zZWN0b3IgPSBiaS0+ Ymlfc2VjdG9yICsgKGJpLT5iaV9zaXplPj45KTsNCj4+ICAJYmktPmJpX25leHQgPSBOVUxMOw0K Pg0KPg==