From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jianpeng Ma" Subject: Re: Re: [PATCH] raid5: fix possible oops in add_stripe_bio when enable pr_debug Date: Tue, 25 Sep 2012 14:50:25 +0800 Message-ID: <201209251450227812256@gmail.com> References: <2012092014334148441317@gmail.com> <20120920164744.1aab090c@notabene.brown> <2012092015175190687821@gmail.com>, <20120925164546.3882f076@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 Return-path: Sender: linux-raid-owner@vger.kernel.org To: Neil Brown Cc: linux-raid List-Id: linux-raid.ids T24gMjAxMi0wOS0yNSAxNDo0NSBOZWlsQnJvd24gPG5laWxiQHN1c2UuZGU+IFdyb3RlOg0KPk9u IFRodSwgMjAgU2VwIDIwMTIgMTU6MTc6NTQgKzA4MDAgIkppYW5wZW5nIE1hIiA8bWFqaWFucGVu Z0BnbWFpbC5jb20+IHdyb3RlOg0KPg0KPj4gT24gMjAxMi0wOS0yMCAxNDo0NyBOZWlsQnJvd24g PG5laWxiQHN1c2UuZGU+IFdyb3RlOg0KPj4gPk9uIFRodSwgMjAgU2VwIDIwMTIgMTQ6MzQ6MDAg KzA4MDAgIkppYW5wZW5nIE1hIiA8bWFqaWFucGVuZ0BnbWFpbC5jb20+IHdyb3RlOg0KPj4gPg0K Pj4gPj4gSW4gZnVuYyBhZGRfc3RyaXBlX2JpbzoNCj4+ID4+ID4+IC4uLi4uDQo+PiA+PiA+PgkJ YmlwID0gJnNoLT5kZXZbZGRfaWR4XS50b3JlYWQ7DQo+PiA+PiA+PiAuLi4uLi4NCj4+ID4+ID4+ c3Bpbl91bmxvY2tfaXJxKCZzaC0+c3RyaXBlX2xvY2spOw0KPj4gPj4gDQo+PiA+PiA+Pglwcl9k ZWJ1ZygiYWRkZWQgYmkgYiMlbGx1IHRvIHN0cmlwZSBzIyVsbHUsIGRpc2sgJWQuXG4iLA0KPj4g Pj4gPj4JCSh1bnNpZ25lZCBsb25nIGxvbmcpKCpiaXApLT5iaV9zZWN0b3IsDQo+PiA+PiA+PgkJ KHVuc2lnbmVkIGxvbmcgbG9uZylzaC0+c2VjdG9yLCBkZF9pZHgpOw0KPj4gPj4gQWZ0ZXIgc3Bp bl91bmxvY2tfaXJxLCB0aGlzIHRocmVhZCBzY2hlZGVkIGFuZCB0b3JlYWQgbWF5IGJlY29tZSBu dWxsLg0KPj4gPj4gU28gaXQgd2lsbCBiZSBvb3BzLg0KPj4gPj4gDQo+PiA+PiBTaWduZWQtb2Zm LWJ5OiBKaWFucGVuZyBNYSA8bWFqaWFucGVuZ0BnbWFpbC5jb20+DQo+PiA+PiAtLS0NCj4+ID4+ ICBkcml2ZXJzL21kL3JhaWQ1LmMgfCAgICAzICsrLQ0KPj4gPj4gIDEgZmlsZSBjaGFuZ2VkLCAy IGluc2VydGlvbnMoKyksIDEgZGVsZXRpb24oLSkNCj4+ID4+IA0KPj4gPj4gZGlmZiAtLWdpdCBh L2RyaXZlcnMvbWQvcmFpZDUuYyBiL2RyaXZlcnMvbWQvcmFpZDUuYw0KPj4gPj4gaW5kZXggYWRk YTk0ZC4uZjE3MmIxZSAxMDA2NDQNCj4+ID4+IC0tLSBhL2RyaXZlcnMvbWQvcmFpZDUuYw0KPj4g Pj4gKysrIGIvZHJpdmVycy9tZC9yYWlkNS5jDQo+PiA+PiBAQCAtMjM1Niw2ICsyMzU2LDcgQEAg c3RhdGljIGludCBhZGRfc3RyaXBlX2JpbyhzdHJ1Y3Qgc3RyaXBlX2hlYWQgKnNoLCBzdHJ1Y3Qg YmlvICpiaSwgaW50IGRkX2lkeCwgaW4NCj4+ID4+ICAJc3RydWN0IGJpbyAqKmJpcDsNCj4+ID4+ ICAJc3RydWN0IHI1Y29uZiAqY29uZiA9IHNoLT5yYWlkX2NvbmY7DQo+PiA+PiAgCWludCBmaXJz dHdyaXRlPTA7DQo+PiA+PiArCXNlY3Rvcl90IHNlY3RvciA9IGJpLT5iaV9zZWN0b3I7DQo+PiA+ PiAgDQo+PiA+PiAgCXByX2RlYnVnKCJhZGRpbmcgYmkgYiMlbGx1IHRvIHN0cmlwZSBzIyVsbHVc biIsDQo+PiA+PiAgCQkodW5zaWduZWQgbG9uZyBsb25nKWJpLT5iaV9zZWN0b3IsDQo+PiA+PiBA QCAtMjQwNiw3ICsyNDA3LDcgQEAgc3RhdGljIGludCBhZGRfc3RyaXBlX2JpbyhzdHJ1Y3Qgc3Ry aXBlX2hlYWQgKnNoLCBzdHJ1Y3QgYmlvICpiaSwgaW50IGRkX2lkeCwgaW4NCj4+ID4+ICAJc3Bp bl91bmxvY2tfaXJxKCZzaC0+c3RyaXBlX2xvY2spOw0KPj4gPj4gIA0KPj4gPj4gIAlwcl9kZWJ1 ZygiYWRkZWQgYmkgYiMlbGx1IHRvIHN0cmlwZSBzIyVsbHUsIGRpc2sgJWQuXG4iLA0KPj4gPj4g LQkJKHVuc2lnbmVkIGxvbmcgbG9uZykoKmJpcCktPmJpX3NlY3RvciwNCj4+ID4+ICsJCSh1bnNp Z25lZCBsb25nIGxvbmcpc2VjdG9yLA0KPj4gPj4gIAkJKHVuc2lnbmVkIGxvbmcgbG9uZylzaC0+ c2VjdG9yLCBkZF9pZHgpOw0KPj4gPj4gIA0KPj4gPj4gIAlpZiAoY29uZi0+bWRkZXYtPmJpdG1h cCAmJiBmaXJzdHdyaXRlKSB7DQo+PiA+DQo+PiA+DQo+PiA+aG93IGFib3V0IHdlIGp1c3QgbW92 ZSB0aGUgc3Bpbl91bmxvY2tfaXJxIGFmdGVyIHRoZSBwcl9kZWJ1Zz8/DQo+PiA+DQo+PiBhaCEg V2h5IGFyZSB5b3UgdGhpbmsgPyBteSBtZXRob2Qgb25seSBhZGQgYSBwYXJhbWV0ZXIuDQo+DQo+ WWVzLg0KPg0KPj4gQlRXLCBpbiBmdW5jIGhhbmRsZV9mYWlsZWRfc3RyaXBlOg0KPj4gPj5pZiAo IXRlc3RfYml0KFI1X1dhbnRmaWxsLCAmc2gtPmRldltpXS5mbGFncykgJiYNCj4+ID4+CQkgICAg KCF0ZXN0X2JpdChSNV9JbnN5bmMsICZzaC0+ZGV2W2ldLmZsYWdzKSB8fA0KPj4gPj4JCSAgICAg IHRlc3RfYml0KFI1X1JlYWRFcnJvciwgJnNoLT5kZXZbaV0uZmxhZ3MpKSkgew0KPj4gPj4JCQli aSA9IHNoLT5kZXZbaV0udG9yZWFkOw0KPj4gPj4JCQlzaC0+ZGV2W2ldLnRvcmVhZCA9IE5VTEw7 DQo+PiA+PgkJCWlmICh0ZXN0X2FuZF9jbGVhcl9iaXQoUjVfT3ZlcmxhcCwgJnNoLT5kZXZbaV0u ZmxhZ3MpKQ0KPj4gPj4JCQkJd2FrZV91cCgmY29uZi0+d2FpdF9mb3Jfb3ZlcmxhcCk7DQo+PiBX aHkgdXNlIHN0cmlwZV9sb2NrIHRvIHByb3RlY3QgdG9yZWFkPw0KPg0KPkkgYXNzdW1lIHlvdSBt ZWFuIHRoYXQgd2Ugc2hvdWxkIGJlIGhvbGRpbmcgdGhlIGxvY2sgdG8gcHJvdGVjdCB0b3JlYWQs IGJ1dA0KPndlIGFyZW4ndC4NCj5JJ3ZlIHF1ZXVlZCBhIHBhdGNoIHRvIGZpeCB0aGF0Lg0KPg0K SGksDQoJTGFzdCBTYXR1cmRheSwgaSBzZW50IGEgcGF0Y2gtc2V0IHdoaWNoIGNvbnRhaW5lZCBh IHBhdGNoIHdoaWNoIGZpeCB0aGlzIGJ1Zy4NCllvdSBjYW4gY2hlY2sgeW91ciBtYWlsIQ0KVGhh bmtzIQ0KPlRoYW5rcy4NCj5OZWlsQnJvd24NCj4NCg0KPg0KPj4gDQo+PiBUaGFua3MhDQo+DQo+