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 16:14:43 +0800 Message-ID: <2012071616143768718310@gmail.com> References: <201207160931507187344@gmail.com> <20120716154010.0ef12c57@notabene.brown> <201207161442513597497@gmail.com> <20120716170717.5d5ee04c@notabene.brown> <201207161511247039289@gmail.com>, <20120716173028.69dd5ead@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: Sender: linux-raid-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org T24gMjAxMi0wNy0xNiAxNTozMCBOZWlsQnJvd24gPG5laWxiQHN1c2UuZGU+IFdyb3RlOg0KPk9u IE1vbiwgMTYgSnVsIDIwMTIgMTU6MTE6MjkgKzA4MDAgbWFqaWFucGVuZyA8bWFqaWFucGVuZ0Bn bWFpbC5jb20+IHdyb3RlOg0KPg0KPj4gT24gMjAxMi0wNy0xNiAxNTowNyBOZWlsQnJvd24gPG5l aWxiQHN1c2UuZGU+IFdyb3RlOg0KPj4gPk9uIE1vbiwgMTYgSnVsIDIwMTIgMTQ6NDI6NTQgKzA4 MDAgbWFqaWFucGVuZyA8bWFqaWFucGVuZ0BnbWFpbC5jb20+IHdyb3RlOg0KPj4gPg0KPj4gPj4g T24gMjAxMi0wNy0xNiAxMzo0MCBOZWlsQnJvd24gPG5laWxiQHN1c2UuZGU+IFdyb3RlOg0KPj4g Pj4gPk9uIE1vbiwgMTYgSnVsIDIwMTIgMDk6MzE6NTUgKzA4MDAgbWFqaWFucGVuZyA8bWFqaWFu cGVuZ0BnbWFpbC5jb20+IHdyb3RlOg0KPj4gPj4gPg0KPj4gW3NuaXBdDQo+PiA+PiA+IE5vcm1h bCAnc3luYycgcmVxdWVzdHMgdXNlIFdSSVRFX1NZTkMgd2hpY2ggaW5jbHVkZXMgIlJFUV9OT0lE TEUiIHdoaWNoIG1lYW5zDQo+PiA+PiA+ICAgLyogZG9uJ3QgYW50aWNpcGF0ZSBtb3JlIElPIGFm dGVyIHRoaXMgb25lICovDQo+PiA+PiA+IE9fRElSRUNUIHJlcXVlc3QgdXNlIFdSSVRFX09ESVJF Q1Qgd2hpY2ggZG9lcyBub3QgaW5jbHVkZSB0aGlzIGZsYWcuDQo+PiA+PiA+DQo+PiA+DQo+PiA+ PiBVc2luZyBSRVFfTk9JREVMIHRvIGRpZmZlcmVuY2Ugb2RpcmVjdCBhbmQgc3luYy5XaHkgbm90 IHVzaW5nOg0KPj4gPj4gICsJaWYgKGJpLT5iaV9ydyAmIFdSSVRFX09ESVJFQ1QpDQo+PiA+PiAg KwkJYmktPmJpX3J3ICY9IH5SRVFfU1lOQzsNCj4+ID4NCj4+ID5CZWNhdXNlIHRoYXQgY29kZSBp cyB3cm9uZy4gIFdSSVRFX09ESVJFQ1QgaXMgbm90IG9uZSBmbGFnLCBpdCBpcyB0d28gZmxhZ3MN Cj4+ID4nb3InZWQgdG9nZXRoZXIuICBTbyB0aGlzIGNvZGUgZG9lcyBub3QgZG8gd2hhdCB5b3Ug ZXhwZWN0Lg0KPj4gPg0KPj4gTm8sIEkgdXNlZCB0aG9zZSBjb2RlIHRlc3QgYW5kIGl0J3Mgb2su DQo+PiBUaGUgY29kZSB1c2VkICYgbm90ICYmLg0KPj4gTWF5YmUgSSB3cm9uZz8NCj4NCj5UaGlu ayBhYm91dCBpdC4uLg0KPg0KPiNkZWZpbmUgUkVRX1dSSVRFICAgICAgICAgICAgICAgKDEgPDwg X19SRVFfV1JJVEUpDQo+I2RlZmluZSBSRVFfU1lOQyAgICAgICAgICAgICAgICAoMSA8PCBfX1JF UV9TWU5DKQ0KPg0KPiNkZWZpbmUgUldfTUFTSyAgICAgICAgICAgICAgICAgUkVRX1dSSVRFDQo+ I2RlZmluZSBXUklURSAgICAgICAgICAgICAgICAgICBSV19NQVNLDQo+DQo+I2RlZmluZSBXUklU RV9PRElSRUNUCQkoV1JJVEUgfCBSRVFfU1lOQykNCj4NCj5TbyAgIA0KPiAgICAoYmktPmJpX3J3 ICYgV1JJVEVfT0RJUkVDVCkNCj4NCj53aWxsIGJlIHRydWUgaWYgZWl0aGVyIFJFUV9XUklURSBv ciBSRVFfU1lOQyBhcmUgc2V0IGluIGJpX3J3DQo+U28gd2hlbmV2ZXIgUkVRX1NZTkMgaXMgc2V0 LCB5b3VyIGNvZGUgY2xlYXJzIHRoZSBmbGFnLg0KPlNvIHlvdXIgY29kZSBpcyBmdW5jdGlvbmFs bHkgaWRlbnRpY2FsIHRvDQo+DQo+ICAgYmktPmJpX3J3ICY9IH5SRVFfU1lOQzsNCj4NCj5OZWls QnJvd24NCj4NCj4NClllcywgdGhhbmtzIHlvdXIgdGltZS5JIG1ha2VkIGEgc3R1cGlkIG1pc3Rh a2UuDQpJJ2xsIGNvcnJlY3RlZCBieSB5b3VyIHN1Z2dlc3Rpb24gYW5kIHJlc2VuZCB0byB5b3Uu