From mboxrd@z Thu Jan 1 00:00:00 1970 From: majianpeng Subject: Re: Re: [PATCH 1/4] md/raid5: Reduce one write-operation when handle badsector Date: Mon, 4 Mar 2013 09:52:57 +0800 Message-ID: <201303040952542954272@gmail.com> References: <201302281550584027165@gmail.com>, <20130304124330.7eb81dde@notabene.brown> Reply-To: majianpeng Mime-Version: 1.0 Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 Return-path: Sender: linux-raid-owner@vger.kernel.org To: NeilBrown Cc: linux-raid List-Id: linux-raid.ids Pk9uIFRodSwgMjggRmViIDIwMTMgMTU6NTE6MDEgKzA4MDAgbWFqaWFucGVuZyA8bWFqaWFucGVu Z0BnbWFpbC5jb20+IHdyb3RlOg0KPg0KPj4gRm9yIGJhZHNlY3RvcixpdCB0b29rIHR3byBzdGVw czpyZXdyaXRlIGFuZCByZXJlYWQuU28gZm9yDQo+PiB3cml0ZS1vcGVyYXRpb24saXQgbWFrZSBu byBzZW5zZSB0byByZXdyaXRlIGFmdGVyIHdyaXRlLW9wZXJhdGlvbi4NCj4NCj5QbGVhc2UgcGxl YXNlIHBsZWFzZSBwbGVhc2UgcGxlYXNlIHRyeSB0byBleHBsYWluIHlvdXJzZWxmIGJldHRlci4N Cj4NClNvcnJ5IGZvciB0aGF0LiANCj5UaGlzIHBhdGNoIGRvZXNuJ3QgbWFrZSBhbnkgc2Vuc2Uu ICBUaGUgd3JpdGUgc3VjY2VlZGVkLiAgV2Ugc2V0IHRoZSBNYWRlR29vZA0KPmZsYWcgc28gdGhh dCBsYXRlciBjb2RlIHdpbGwgcmVtb3ZlIHRoZSBibG9jayBmcm9tIHRoZSBiYWQtYmxvY2sgbGlz dC4NCj5UaGVyZSB3aWxsIGJlIG5vIHJlLXJlYWQgb3IgcmUtd3JpdGUuDQo+DQpGb3IgYSBzdHJp ZXAgd2hpY2ggY29udGFpbiBiYWRzZWN0b3IgaXMgZG9pbmcgd3JpdGUtb3BlcmF0aW9uLg0KSW4g YW5hbHlzZV9zdHJpcGUsIGl0IGNoZWNrIGJhZHNlY3RvciBhbmQgc2V0IFI1X1JlYWRFcnJvci4N CiB3cml0ZS0tLT5NYWRlR29vZC0+Y2xlYXIgYmFkYmxvY2sgbG9nLiBCdXQgaXQgY2FuJ3QgY2xl YXIgUjVfUmVhZEVycm9yIGZsYWcuDQpTbyBpdCB3aWxsIGV4ZWMgdGhvc2UgY29kZSBpbiBmdW5j IGhhbmRsZV9zdHJpcGU6DQo+ICAgICAgICAvKiBJZiB0aGUgZmFpbGVkIGRyaXZlcyBhcmUganVz dCBhIFJlYWRFcnJvciwgdGhlbiB3ZSBtaWdodCBuZWVkDQo+ICAgICAgICAgKiB0byBwcm9ncmVz cyB0aGUgcmVwYWlyL2NoZWNrIHByb2Nlc3MNCj4gICAgICAgICAqLw0KPiAgICAgICAgaWYgKHMu ZmFpbGVkIDw9IGNvbmYtPm1heF9kZWdyYWRlZCAmJiAhY29uZi0+bWRkZXYtPnJvKQ0KPiAgICAg ICAgICAgICAgICBmb3IgKGkgPSAwOyBpIDwgcy5mYWlsZWQ7IGkrKykgew0KPiAgICAgICAgICAg ICAgICAgICAgICAgIHN0cnVjdCByNWRldiAqZGV2ID0gJnNoLT5kZXZbcy5mYWlsZWRfbnVtW2ld XTsNCj4gICAgICAgICAgICAgICAgICAgICAgICBpZiAodGVzdF9iaXQoUjVfUmVhZEVycm9yLCAm ZGV2LT5mbGFncykNCj4gICAgICAgICAgICAgICAgICAgICAgICAgICAgJiYgIXRlc3RfYml0KFI1 X0xPQ0tFRCwgJmRldi0+ZmxhZ3MpDQo+ICAgICAgICAgICAgICAgICAgICAgICAgICAgICYmIHRl c3RfYml0KFI1X1VQVE9EQVRFLCAmZGV2LT5mbGFncykNCj4gICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICkgeyAgDQo+ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICBpZiAoIXRl c3RfYml0KFI1X1JlV3JpdGUsICZkZXYtPmZsYWdzKSkgew0KPiAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICBzZXRfYml0KFI1X1dhbnR3cml0ZSwgJmRldi0+ZmxhZ3MpOw0K PiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICBzZXRfYml0KFI1X1JlV3Jp dGUsICZkZXYtPmZsYWdzKTsNCj4gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgc2V0X2JpdChSNV9MT0NLRUQsICZkZXYtPmZsYWdzKTsNCj4gICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgcy5sb2NrZWQrKzsNCj4gICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgIH0gZWxzZSB7DQo+ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgIC8qIGxldCdzIHJlYWQgaXQgYmFjayAqLw0KPiAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICBzZXRfYml0KFI1X1dhbnRyZWFkLCAmZGV2LT5mbGFncyk7DQo+ICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgc2V0X2JpdChSNV9MT0NLRUQsICZkZXYt PmZsYWdzKTsNCj4gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICBzLmxvY2tl ZCsrOw0KPiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgfSAgICANCj4gICAgICAgICAg ICAgICAgICAgICAgICB9ICAgIA0KPiAgICAgICAgICAgICAgICB9ICAgIA0KDQpCdXQgdGhlIGZs YWcgUmVXcml0ZSBjYW4ndCBzZXQuIFNvIGl0IGRvIHdyaXRlLW9wZXJhdG9pbiBhZ2Fpbi5UaGVu IGRvIHJlYWQtb3BlcmF0aW9uLg0KDQpUaGFua3MhDQpKaWFucGVuZyBNYQ0KPk5laWxCcm93bg0K Pg0KPg0KPj4gDQo+PiBTaWduZWQtb2ZmLWJ5OiBKaWFucGVuZyBNYSA8bWFqaWFucGVuZ0BnbWFp bC5jb20+DQo+PiAtLS0NCj4+ICBkcml2ZXJzL21kL3JhaWQ1LmMgfCAgICA0ICsrKy0NCj4+ICAx IGZpbGUgY2hhbmdlZCwgMyBpbnNlcnRpb25zKCspLCAxIGRlbGV0aW9uKC0pDQo+PiANCj4+IGRp ZmYgLS1naXQgYS9kcml2ZXJzL21kL3JhaWQ1LmMgYi9kcml2ZXJzL21kL3JhaWQ1LmMNCj4+IGlu ZGV4IDE5ZDc3YTAuLjU5YzA1NjkgMTAwNjQ0DQo+PiAtLS0gYS9kcml2ZXJzL21kL3JhaWQ1LmMN Cj4+ICsrKyBiL2RyaXZlcnMvbWQvcmFpZDUuYw0KPj4gQEAgLTE5MjEsOCArMTkyMSwxMCBAQCBz dGF0aWMgdm9pZCByYWlkNV9lbmRfd3JpdGVfcmVxdWVzdChzdHJ1Y3QgYmlvICpiaSwgaW50IGVy cm9yKQ0KPj4gIAkJCQkJJnJkZXYtPm1kZGV2LT5yZWNvdmVyeSk7DQo+PiAgCQl9IGVsc2UgaWYg KGlzX2JhZGJsb2NrKHJkZXYsIHNoLT5zZWN0b3IsDQo+PiAgCQkJCSAgICAgICBTVFJJUEVfU0VD VE9SUywNCj4+IC0JCQkJICAgICAgICZmaXJzdF9iYWQsICZiYWRfc2VjdG9ycykpDQo+PiArCQkJ CSAgICAgICAmZmlyc3RfYmFkLCAmYmFkX3NlY3RvcnMpKSB7DQo+PiAgCQkJc2V0X2JpdChSNV9N YWRlR29vZCwgJnNoLT5kZXZbaV0uZmxhZ3MpOw0KPj4gKwkJCXNldF9iaXQoUjVfUmVXcml0ZSwg JnNoLT5kZXZbaV0uZmxhZ3MpOw0KPj4gKwkJfQ0KPj4gIAl9DQo+PiAgCXJkZXZfZGVjX3BlbmRp bmcocmRldiwgY29uZi0+bWRkZXYpOw0KPj4gIA0KPg0KPg==