From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Bart Van Assche To: "axboe@kernel.dk" , "joseph.qi@linux.alibaba.com" , "ming.lei@redhat.com" CC: "linux-block@vger.kernel.org" Subject: Re: [block regression] kernel oops triggered by removing scsi device dring IO Date: Mon, 9 Apr 2018 22:54:57 +0000 Message-ID: References: <20180408042112.GB19128@ming.t460p> <678220c26fa1677ab162006620b345ea4f38c86b.camel@wdc.com> <44abf88a-ded4-bbf5-8410-6692ee5ebabb@linux.alibaba.com> In-Reply-To: <44abf88a-ded4-bbf5-8410-6692ee5ebabb@linux.alibaba.com> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 List-ID: T24gTW9uLCAyMDE4LTA0LTA5IGF0IDE0OjU0ICswODAwLCBKb3NlcGggUWkgd3JvdGU6DQo+IFRo ZSBvb3BzIGhhcHBlbnMgZHVyaW5nIGdlbmVyaWNfbWFrZV9yZXF1ZXN0X2NoZWNrcygpLCBpbg0K PiBibGtfdGhyb3RsX2JpbygpIGV4YWN0bHkuDQo+IFNvIGlmIHdlIHdhbnQgdG8gYnlwYXNzIGR5 aW5nIHF1ZXVlLCB3ZSBoYXZlIHRvIGNoZWNrIHRoaXMgYmVmb3JlDQo+IGdlbmVyaWNfbWFrZV9y ZXF1ZXN0X2NoZWNrcygpLCBJIHRoaW5rLg0KDQpIb3cgYWJvdXQgc29tZXRoaW5nIGxpa2UgdGhl IHBhdGNoIGJlbG93Pw0KDQpUaGFua3MsDQoNCkJhcnQuDQoNClN1YmplY3Q6IFtQQVRDSF0gYmxr LW1xOiBBdm9pZCB0aGF0IHN1Ym1pdHRpbmcgYSBiaW8gY29uY3VycmVudGx5IHdpdGggZGV2aWNl DQogcmVtb3ZhbCB0cmlnZ2VycyBhIGNyYXNoDQoNCkJlY2F1c2UgYmxrY2dfZXhpdF9xdWV1ZSgp IGlzIG5vdyBjYWxsZWQgZnJvbSBpbnNpZGUgYmxrX2NsZWFudXBfcXVldWUoKQ0KaXQgaXMgbm8g bG9uZ2VyIHNhZmUgdG8gYWNjZXNzIGNncm91cCBpbmZvcm1hdGlvbiBkdXJpbmcgb3IgYWZ0ZXIg dGhlDQpibGtfY2xlYW51cF9xdWV1ZSgpIGNhbGwuIEhlbmNlIHByb3RlY3QgdGhlIGdlbmVyaWNf bWFrZV9yZXF1ZXN0X2NoZWNrcygpDQpjYWxsIHdpdGggYSBibGtfcXVldWVfZW50ZXIoKSAvIGJs a19xdWV1ZV9leGl0KCkgcGFpci4NCg0KLS0tDQogYmxvY2svYmxrLWNvcmUuYyB8IDE3ICsrKysr KysrKysrKysrKystDQogMSBmaWxlIGNoYW5nZWQsIDE2IGluc2VydGlvbnMoKyksIDEgZGVsZXRp b24oLSkNCg0KZGlmZiAtLWdpdCBhL2Jsb2NrL2Jsay1jb3JlLmMgYi9ibG9jay9ibGstY29yZS5j DQppbmRleCBkNjk4ODhmZjUyZjAuLjBjNDhiZWY4NDkwZiAxMDA2NDQNCi0tLSBhL2Jsb2NrL2Js ay1jb3JlLmMNCisrKyBiL2Jsb2NrL2Jsay1jb3JlLmMNCkBAIC0yMzg4LDkgKzIzODgsMjQgQEAg YmxrX3FjX3QgZ2VuZXJpY19tYWtlX3JlcXVlc3Qoc3RydWN0IGJpbyAqYmlvKQ0KIAkgKiB5ZXQu DQogCSAqLw0KIAlzdHJ1Y3QgYmlvX2xpc3QgYmlvX2xpc3Rfb25fc3RhY2tbMl07DQorCWJsa19t cV9yZXFfZmxhZ3NfdCBmbGFncyA9IGJpby0+Ymlfb3BmICYgUkVRX05PV0FJVCA/DQorCQlCTEtf TVFfUkVRX05PV0FJVCA6IDA7DQorCXN0cnVjdCByZXF1ZXN0X3F1ZXVlICpxID0gYmlvLT5iaV9k aXNrLT5xdWV1ZTsNCisJYm9vbCBjaGVja19yZXN1bHQ7DQogCWJsa19xY190IHJldCA9IEJMS19R Q19UX05PTkU7DQogDQotCWlmICghZ2VuZXJpY19tYWtlX3JlcXVlc3RfY2hlY2tzKGJpbykpDQor CWlmIChibGtfcXVldWVfZW50ZXIocSwgZmxhZ3MpIDwgMCkgew0KKwkJaWYgKCFibGtfcXVldWVf ZHlpbmcocSkgJiYgKGJpby0+Ymlfb3BmICYgUkVRX05PV0FJVCkpDQorCQkJYmlvX3dvdWxkYmxv Y2tfZXJyb3IoYmlvKTsNCisJCWVsc2UNCisJCQliaW9faW9fZXJyb3IoYmlvKTsNCisJCXJldHVy biByZXQ7DQorCX0NCisNCisJY2hlY2tfcmVzdWx0ID0gZ2VuZXJpY19tYWtlX3JlcXVlc3RfY2hl Y2tzKGJpbyk7DQorCWJsa19xdWV1ZV9leGl0KHEpOw0KKw0KKwlpZiAoIWNoZWNrX3Jlc3VsdCkN CiAJCWdvdG8gb3V0Ow0KIA0KIAkvKg0KLS0gDQoyLjE2LjINCg==