From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Bart Van Assche To: "ming.lei@redhat.com" CC: "linux-kernel@vger.kernel.org" , "linux-block@vger.kernel.org" , "hch@infradead.org" , "martin.petersen@oracle.com" , "linux-scsi@vger.kernel.org" , "axboe@fb.com" , "hare@suse.com" , "holger@applied-asynchrony.com" , "jejb@linux.vnet.ibm.com" Subject: Re: [PATCH] SCSI: run queue if SCSI device queue isn't ready and queue is idle Date: Thu, 7 Dec 2017 21:06:58 +0000 Message-ID: <1512680817.2624.29.camel@wdc.com> References: <20171205075256.10319-1-ming.lei@redhat.com> <1512490099.2660.6.camel@sandisk.com> <20171205162825.GA23788@ming.t460p> In-Reply-To: <20171205162825.GA23788@ming.t460p> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Sender: linux-scsi-owner@vger.kernel.org List-ID: T24gV2VkLCAyMDE3LTEyLTA2IGF0IDAwOjI4ICswODAwLCBNaW5nIExlaSB3cm90ZToNCj4gT24g VHVlLCBEZWMgMDUsIDIwMTcgYXQgMDQ6MDg6MjBQTSArMDAwMCwgQmFydCBWYW4gQXNzY2hlIHdy b3RlOg0KPiA+IE9uIFR1ZSwgMjAxNy0xMi0wNSBhdCAxNTo1MiArMDgwMCwgTWluZyBMZWkgd3Jv dGU6DQo+ID4gPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9zY3NpL3Njc2lfbGliLmMgYi9kcml2ZXJz L3Njc2kvc2NzaV9saWIuYw0KPiA+ID4gaW5kZXggZGI5NTU2NjYyZTI3Li4xODE2ZGQ4MjU5YjMg MTAwNjQ0DQo+ID4gPiAtLS0gYS9kcml2ZXJzL3Njc2kvc2NzaV9saWIuYw0KPiA+ID4gKysrIGIv ZHJpdmVycy9zY3NpL3Njc2lfbGliLmMNCj4gPiA+IEBAIC0xOTY3LDYgKzE5NjcsOCBAQCBzdGF0 aWMgYm9vbCBzY3NpX21xX2dldF9idWRnZXQoc3RydWN0IGJsa19tcV9od19jdHggKmhjdHgpDQo+ ID4gPiAgb3V0X3B1dF9kZXZpY2U6DQo+ID4gPiAgCXB1dF9kZXZpY2UoJnNkZXYtPnNkZXZfZ2Vu ZGV2KTsNCj4gPiA+ICBvdXQ6DQo+ID4gPiArCWlmIChhdG9taWNfcmVhZCgmc2Rldi0+ZGV2aWNl X2J1c3kpID09IDAgJiYgIXNjc2lfZGV2aWNlX2Jsb2NrZWQoc2RldikpDQo+ID4gPiArCQlibGtf bXFfZGVsYXlfcnVuX2h3X3F1ZXVlKGhjdHgsIFNDU0lfUVVFVUVfREVMQVkpOw0KPiA+ID4gIAly ZXR1cm4gZmFsc2U7DQo+ID4gPiAgfQ0KPiA+IA0KPiA+IFRoaXMgY2Fubm90IHdvcmsgc2luY2Ug bXVsdGlwbGUgdGhyZWFkcyBjYW4gY2FsbCBzY3NpX21xX2dldF9idWRnZXQoKQ0KPiANCj4gVGhh dCBpcyBleGFjdGx5IHRoZSB3YXkgd2UgYXJlIGhhbmRsaW5nIHRoZXNlIGNhc2VzIGJlZm9yZSAw ZGYyMWM4NmJkYmYoc2NzaToNCj4gaW1wbGVtZW50IC5nZXRfYnVkZ2V0IGFuZCAucHV0X2J1ZGdl dCBmb3IgYmxrLW1xKSwgc28gaWYgaXQgY2FuJ3Qgd29yaywNCj4gdGhhdCBpcyBub3QgZmF1bHQg b2YgY29tbWl0IDBkZjIxYzg2YmRiZi4NCj4gDQo+ID4gY29uY3VycmVudGx5IGFuZCBoZW5jZSBp dCBjYW4gaGFwcGVuIHRoYXQgbm9uZSBvZiB0aGVtIHNlZXMNCj4gPiBhdG9taWNfcmVhZCgmc2Rl di0+ZGV2aWNlX2J1c3kpID09IDAuIEJUVywgdGhlIGFib3ZlIHBhdGNoIGlzIHNvbWV0aGluZyBJ DQo+IA0KPiBJZiB0aGVyZSBpcyBjb25jdXJyZW50IC5nZXRfYnVkZ2V0KCksIG9uZSBvZiB0aGVt IHdpbGwgc2VlIHRoZSBjb3VudGVyDQo+IGJlY29taW5nIHplcm8gZmluYWxseSBiZWNhdXNlIGVh Y2ggc2Rldi0+ZGV2aWNlX2J1c3kgaXMgaW5jL2RlYw0KPiBhdG9taWNhbGx5LiBPciBzY3NpX2Rl dl9xdWV1ZV9yZWFkeSgpIHJldHVybiB0cnVlLg0KPiANCj4gQW55d2F5LCB3ZSBuZWVkIHRoaXMg cGF0Y2ggdG8gYXZvaWQgcG9zc2libGUgcmVncmVzc2lvbi4gSWYgeW91IHRoaW5rDQo+IHRoZXJl IGFyZSBidWdzIGluIGJsay1tcSBSRVNUQVJULCBqdXN0IHJvb3QgY2F1c2UgYW5kIGFuZCBmaXgg aXQuDQoNCkhlbGxvIE1pbmcsDQoNCldoZW4gSSBsb29rZWQgYXQgdGhlIHBhdGNoIGF0IHRoZSBz dGFydCBvZiB0aGlzIHRocmVhZCBmb3IgdGhlIGZpcnN0IHRpbWUgSQ0KZ290IGZydXN0cmF0ZWQg YmVjYXVzZSBJIGRpZG4ndCBzZWUgaG93IHRoaXMgcGF0Y2ggY291bGQgZml4IHRoZSBxdWV1ZSBz dGFsbA0KSSByYW4gaW50byBteXNlbGYuIFRvZGF5IEkgc3RhcnRlZCByZWFsaXppbmcgdGhhdCB3 aGF0IEhvbGdlciByZXBvcnRlZCBpcw0KcHJvYmFibHkgYW5vdGhlciBpc3N1ZSB0aGFuIHdoYXQg SSByYW4gaW50byBteXNlbGYuIFNpbmNlIHRoaXMgcGF0Y2ggYnkNCml0c2VsZiBsb29rcyBub3cg dXNlZnVsIHRvIG1lOg0KDQpSZXZpZXdlZC1ieTogQmFydCBWYW4gQXNzY2hlIDxiYXJ0LnZhbmFz c2NoZUB3ZGMuY29tPg0KDQpCVFcsIGRvIHlvdSB0aGluayB0aGUgcGF0Y2ggYXQgdGhlIHN0YXJ0 IG9mIHRoaXMgdGhyZWFkIGFsc28gZml4ZXMgdGhlIGlzc3VlDQp0aGF0IHJlc3VsdGVkIGluIGNv bW1pdCA4MjZhNzBhMDhiMTIgKCJTQ1NJOiBkb24ndCBnZXQgdGFyZ2V0L2hvc3QgYnVzeV9jb3Vu dA0KaW4gc2NzaV9tcV9nZXRfYnVkZ2V0KCkiKT8gRG8geW91IHRoaW5rIHdlIHN0aWxsIG5lZWQg dGhhdCBwYXRjaD8NCg0KQmFydC4=