Re: [PATCH V2 05/20] blk-mq-sched: improve dispatching from sw queue
flat view
From: Bart Van Assche <hidden>
Date: 2017-08-22 19:56:43
T24gU2F0LCAyMDE3LTA4LTA1IGF0IDE0OjU2ICswODAwLCBNaW5nIExlaSB3cm90ZToNCj4gZWFz eSB0byBjYXVzZSBxdWV1ZSBidXN5IGJlY2FzdWUgb2YgdGhlIHNtYWxsDQogICAgICAgICAgICAg ICAgICAgICAgICAgICBeXl5eXl5eDQogICAgICAgICAgICAgICAgICAgICAgICAgICBiZWNhdXNl Pw0KIA0KPiAtc3RhdGljIHZvaWQgYmxrX21xX2RvX2Rpc3BhdGNoKHN0cnVjdCByZXF1ZXN0X3F1 ZXVlICpxLA0KPiAtCQkJICAgICAgIHN0cnVjdCBlbGV2YXRvcl9xdWV1ZSAqZSwNCj4gLQkJCSAg ICAgICBzdHJ1Y3QgYmxrX21xX2h3X2N0eCAqaGN0eCkNCj4gK3N0YXRpYyBpbmxpbmUgdm9pZCBi bGtfbXFfZG9fZGlzcGF0Y2hfc2NoZWQoc3RydWN0IHJlcXVlc3RfcXVldWUgKnEsDQo+ICsJCQkJ CSAgICBzdHJ1Y3QgZWxldmF0b3JfcXVldWUgKmUsDQo+ICsJCQkJCSAgICBzdHJ1Y3QgYmxrX21x X2h3X2N0eCAqaGN0eCkNCj4gIHsNCj4gIAlMSVNUX0hFQUQocnFfbGlzdCk7DQoNCldoeSB0byBk ZWNsYXJlIHRoaXMgZnVuY3Rpb24gImlubGluZSI/IEFyZSB5b3Ugc3VyZSB0aGF0IHRoZSBjb21w aWxlcg0KaXMgbm90IHNtYXJ0IGVub3VnaCB0byBkZWNpZGUgb24gaXRzIG93biB3aGV0aGVyIG9y IG5vdCB0byBpbmxpbmUgdGhpcw0KZnVuY3Rpb24/DQoNCj4gK3N0YXRpYyBpbmxpbmUgc3RydWN0 IGJsa19tcV9jdHggKmJsa19tcV9uZXh0X2N0eChzdHJ1Y3QgYmxrX21xX2h3X2N0eCAqaGN0eCwN Cj4gKwkJCQkJCSBzdHJ1Y3QgYmxrX21xX2N0eCAqY3R4KQ0KPiArew0KPiArCXVuc2lnbmVkIGlk eCA9IGN0eC0+aW5kZXhfaHc7DQo+ICsNCj4gKwlpZiAoKytpZHggPT0gaGN0eC0+bnJfY3R4KQ0K PiArCQlpZHggPSAwOw0KPiArDQo+ICsJcmV0dXJuIGhjdHgtPmN0eHNbaWR4XTsNCj4gK30NCj4g Kw0KPiArc3RhdGljIGlubGluZSB2b2lkIGJsa19tcV9kb19kaXNwYXRjaF9jdHgoc3RydWN0IHJl cXVlc3RfcXVldWUgKnEsDQo+ICsJCQkJCSAgc3RydWN0IGJsa19tcV9od19jdHggKmhjdHgpDQo+ ICt7DQo+ICsJTElTVF9IRUFEKHJxX2xpc3QpOw0KPiArCXN0cnVjdCBibGtfbXFfY3R4ICpjdHgg PSBOVUxMOw0KPiArDQo+ICsJZG8gew0KPiArCQlzdHJ1Y3QgcmVxdWVzdCAqcnE7DQo+ICsNCj4g KwkJcnEgPSBibGtfbXFfZGlzcGF0Y2hfcnFfZnJvbV9jdHgoaGN0eCwgY3R4KTsNCj4gKwkJaWYg KCFycSkNCj4gKwkJCWJyZWFrOw0KPiArCQlsaXN0X2FkZCgmcnEtPnF1ZXVlbGlzdCwgJnJxX2xp c3QpOw0KPiArDQo+ICsJCS8qIHJvdW5kIHJvYmluIGZvciBmYWlyIGRpc3BhdGNoICovDQo+ICsJ CWN0eCA9IGJsa19tcV9uZXh0X2N0eChoY3R4LCBycS0+bXFfY3R4KTsNCj4gKwl9IHdoaWxlIChi bGtfbXFfZGlzcGF0Y2hfcnFfbGlzdChxLCAmcnFfbGlzdCkpOw0KPiArfQ0KDQpQbGVhc2UgY29u c2lkZXIgdG8gbW92ZSB0aGUgYmxrX21xX25leHRfY3R4KCkgZnVuY3Rpb25hbGl0eSBpbnRvDQpi bGtfbXFfZGlzcGF0Y2hfcnFfZnJvbV9jdHgoKSBhcyByZXF1ZXN0ZWQgaW4gYSBjb21tZW50IG9u IGEgcHJldmlvdXMgcGF0Y2guDQoNCj4gIHZvaWQgYmxrX21xX3NjaGVkX2Rpc3BhdGNoX3JlcXVl c3RzKHN0cnVjdCBibGtfbXFfaHdfY3R4ICpoY3R4KQ0KPiAgew0KPiAgCXN0cnVjdCByZXF1ZXN0 X3F1ZXVlICpxID0gaGN0eC0+cXVldWU7DQo+IEBAIC0xNDIsMTggKzE3MiwzMSBAQCB2b2lkIGJs a19tcV9zY2hlZF9kaXNwYXRjaF9yZXF1ZXN0cyhzdHJ1Y3QgYmxrX21xX2h3X2N0eCAqaGN0eCkN Cj4gIAlpZiAoIWxpc3RfZW1wdHkoJnJxX2xpc3QpKSB7DQo+ICAJCWJsa19tcV9zY2hlZF9tYXJr X3Jlc3RhcnRfaGN0eChoY3R4KTsNCj4gIAkJZG9fc2NoZWRfZGlzcGF0Y2ggPSBibGtfbXFfZGlz cGF0Y2hfcnFfbGlzdChxLCAmcnFfbGlzdCk7DQo+IC0JfSBlbHNlIGlmICghaGFzX3NjaGVkX2Rp c3BhdGNoKSB7DQo+ICsJfSBlbHNlIGlmICghaGFzX3NjaGVkX2Rpc3BhdGNoICYgIXEtPnF1ZXVl X2RlcHRoKSB7DQoNClBsZWFzZSB1c2UgIiYmIiBpbnN0ZWFkIG9mICImIiB0byByZXByZXNlbnQg bG9naWNhbCBhbmQuDQoNCk90aGVyd2lzZSB0aGlzIHBhdGNoIGxvb2tzIGZpbmUgdG8gbWUuDQoN ClRoYW5rcywNCg0KQmFydC4=