From mboxrd@z Thu Jan 1 00:00:00 1970 From: majianpeng Subject: Re: Re: [PATCH 1/2] md:Avoid write invalid address if read_seqretry returned true. Date: Tue, 6 Nov 2012 18:36:33 +0800 Message-ID: <201211061836292577626@gmail.com> References: <201211061712569914353@gmail.com>, <20121106211455.417b35f1@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 , zhuwenfeng List-Id: linux-raid.ids Pk9uIFR1ZSwgNiBOb3YgMjAxMiAxNzoxMzowMCArMDgwMCBtYWppYW5wZW5nIDxtYWppYW5wZW5n QGdtYWlsLmNvbT4gd3JvdGU6DQo+DQo+PiBJZiByZWFkX3NlcXJldHJ5IHJldHVybmVkIHRydWUg YW5kIGJicCB3YXMgY2hhbmdlZCwgaXQgd2lsbCB3cml0ZQ0KPj4gaW52YWxpZCBhZGRyZXNzIHdo aWNoIGNhbiBjYXVzZSBzb21lIHNlcmlvdXMgcHJvYmxlbS4NCj4+IA0KPj4gVGhpcyBidWcgd2Fz IGludHJvZHVjZWQgYnkgY29tbWl0IHYzLjAtcmM3LTEzMC1nMjY5OWI2Ny4NCj4+IFNvIGZpeCBp cyBzdWl0YWJsZSBmb3IgMy4wLnkgdGhydSAzLjYueS4NCj4+IA0KPj4gUmVwb3J0ZWQtYnk6IHpo dXdlbmZlbmdAa2VkYWNvbS5jb20NCj4+IFRlc3RlZC1ieTogemh1d2VuZmVuZ0BrZWRhY29tLmNv bQ0KPj4gQ2M6IHN0YWJsZUB2Z2VyLmtlcm5lbC5vcmcNCj4+IFNpZ25lZC1vZmYtYnk6IEppYW5w ZW5nIE1hIDxtYWppYW5wZW5nQGdtYWlsLmNvbT4NCj4+IC0tLQ0KPj4gIGRyaXZlcnMvbWQvbWQu YyB8ICAgIDQgKystLQ0KPj4gIDEgZmlsZSBjaGFuZ2VkLCAyIGluc2VydGlvbnMoKyksIDIgZGVs ZXRpb25zKC0pDQo+PiANCj4+IGRpZmYgLS1naXQgYS9kcml2ZXJzL21kL21kLmMgYi9kcml2ZXJz L21kL21kLmMNCj4+IGluZGV4IDlhYjc2OGEuLmQ2M2FhNzggMTAwNjQ0DQo+PiAtLS0gYS9kcml2 ZXJzL21kL21kLmMNCj4+ICsrKyBiL2RyaXZlcnMvbWQvbWQuYw0KPj4gQEAgLTE4MDUsMTUgKzE4 MDUsMTUgQEAgc3RhdGljIHZvaWQgc3VwZXJfMV9zeW5jKHN0cnVjdCBtZGRldiAqbWRkZXYsIHN0 cnVjdCBtZF9yZGV2ICpyZGV2KQ0KPj4gIAkJbWRfZXJyb3IobWRkZXYsIHJkZXYpOw0KPj4gIAll bHNlIHsNCj4+ICAJCXN0cnVjdCBiYWRibG9ja3MgKmJiID0gJnJkZXYtPmJhZGJsb2NrczsNCj4+ IC0JCXU2NCAqYmJwID0gKHU2NCAqKXBhZ2VfYWRkcmVzcyhyZGV2LT5iYl9wYWdlKTsNCj4+ICAJ CXU2NCAqcCA9IGJiLT5wYWdlOw0KPj4gIAkJc2ItPmZlYXR1cmVfbWFwIHw9IGNwdV90b19sZTMy KE1EX0ZFQVRVUkVfQkFEX0JMT0NLUyk7DQo+PiAgCQlpZiAoYmItPmNoYW5nZWQpIHsNCj4+ICAJ CQl1bnNpZ25lZCBzZXE7DQo+PiArCQkJdTY0ICpiYnA7DQo+PiAgDQo+PiAgcmV0cnk6DQo+PiAr CQkJYmJwID0gKHU2NCAqKXBhZ2VfYWRkcmVzcyhyZGV2LT5iYl9wYWdlKTsNCj4+ICAJCQlzZXEg PSByZWFkX3NlcWJlZ2luKCZiYi0+bG9jayk7DQo+PiAtDQo+PiAgCQkJbWVtc2V0KGJicCwgMHhm ZiwgUEFHRV9TSVpFKTsNCj4+ICANCj4+ICAJCQlmb3IgKGkgPSAwIDsgaSA8IGJiLT5jb3VudCA7 IGkrKykgew0KPg0KPg0KPk5vLg0KPlRoZSBjb250ZW50cyBvZiB0aGUgcGFnZSBtaWdodCBjaGFu Z2UsIGJ1dCBpdCBpcyBhbHdheXMgdGhlIHNhbWUgcGFnZSwgc28gaXQNCj5hbHdheXMgaGFzIHRo ZSBzYW1lIGFkZHJlc3MsIHNvICJiYnAiIGlzIGd1YXJhbnRlZWQgdG8gYmUgc3RhYmxlLg0KPg0K Pk5laWxCcm93bg0KPg0KSXMgbXkgdW5kZXJzdGFuZCB3cm9uZz8NCj51NjQgKmJicCA9ICh1NjQg KilwYWdlX2FkZHJlc3MocmRldi0+YmJfcGFnZSk7DQo+CQl1NjQgKnAgPSBiYi0+cGFnZTsNCj4J CXNiLT5mZWF0dXJlX21hcCB8PSBjcHVfdG9fbGUzMihNRF9GRUFUVVJFX0JBRF9CTE9DS1MpOw0K PgkJaWYgKGJiLT5jaGFuZ2VkKSB7DQo+CQkJdW5zaWduZWQgc2VxOw0KDQo+cmV0cnk6DQo+CQkJ c2VxID0gcmVhZF9zZXFiZWdpbigmYmItPmxvY2spOw0KDQo+CQkJbWVtc2V0KGJicCwgMHhmZiwg UEFHRV9TSVpFKTsNCg0KPgkJCWZvciAoaSA9IDAgOyBpIDwgYmItPmNvdW50IDsgaSsrKSB7DQo+ CQkJCXU2NCBpbnRlcm5hbF9iYiA9ICpwKys7DQo+CQkJCXU2NCBzdG9yZV9iYiA9ICgoQkJfT0ZG U0VUKGludGVybmFsX2JiKSA8PCAxMCkNCj4JCQkJCQl8IEJCX0xFTihpbnRlcm5hbF9iYikpOw0K PgkJCQkqYmJwKysgPSBjcHVfdG9fbGU2NChzdG9yZV9iYik7DQpJIHRoaW5rIGJicCB3aWxsIGJl IGNoYW5nZWQuIElzIG9rPw0KPgkJCX0NCj4JCQliYi0+Y2hhbmdlZCA9IDA7DQo+CQkJaWYgKHJl YWRfc2VxcmV0cnkoJmJiLT5sb2NrLCBzZXEpKQ0KPgkJCQlnb3RvIHJldHJ5Ow0KDQoJ