From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Bart Van Assche To: "linux-scsi@vger.kernel.org" , "linux-block@vger.kernel.org" , Damien Le Moal , "martin.petersen@oracle.com" , "axboe@kernel.dk" CC: "hch@lst.de" Subject: Re: [PATCH V5 13/14] block: mq-deadline: Limit write request dispatch for zoned block devices Date: Mon, 25 Sep 2017 22:06:59 +0000 Message-ID: <1506377218.2641.37.camel@wdc.com> References: <20170925061454.5533-1-damien.lemoal@wdc.com> <20170925061454.5533-14-damien.lemoal@wdc.com> In-Reply-To: <20170925061454.5533-14-damien.lemoal@wdc.com> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 List-ID: T24gTW9uLCAyMDE3LTA5LTI1IGF0IDE1OjE0ICswOTAwLCBEYW1pZW4gTGUgTW9hbCB3cm90ZToN Cj4gLQlyZXR1cm4gcnFfZW50cnlfZmlmbyhkZC0+Zmlmb19saXN0W2RhdGFfZGlyXS5uZXh0KTsN Cj4gKwlpZiAoIWRkLT56b25lc193bG9jayB8fCBkYXRhX2RpciA9PSBSRUFEKQ0KPiArCQlyZXR1 cm4gcnFfZW50cnlfZmlmbyhkZC0+Zmlmb19saXN0W2RhdGFfZGlyXS5uZXh0KTsNCj4gKw0KPiAr CXNwaW5fbG9ja19pcnFzYXZlKCZkZC0+em9uZV9sb2NrLCBmbGFncyk7DQo+ICsNCj4gKwlsaXN0 X2Zvcl9lYWNoX2VudHJ5KHJxLCAmZGQtPmZpZm9fbGlzdFtXUklURV0sIHF1ZXVlbGlzdCkgew0K PiArCQlpZiAoZGVhZGxpbmVfY2FuX2Rpc3BhdGNoX3JlcXVlc3QoZGQsIHJxKSkNCj4gKwkJCWdv dG8gb3V0Ow0KPiArCX0NCj4gKwlycSA9IE5VTEw7DQo+ICsNCj4gK291dDoNCj4gKwlzcGluX3Vu bG9ja19pcnFyZXN0b3JlKCZkZC0+em9uZV9sb2NrLCBmbGFncyk7DQoNCklzIGl0IGRvY3VtZW50 ZWQgc29tZXdoZXJlIHdoYXQgZGQtPnpvbmVfbG9jayBwcm90ZWN0cyBhbmQgd2hlbiB0aGF0IGxv Y2sgc2hvdWxkIGJlDQphY3F1aXJlZD8NCg0KPiAJLyoNCj4gIAkgKiBUaGlzIG1heSBiZSBhIHJl cXVldWUgb2YgYSByZXF1ZXN0IHRoYXQgaGFzIGxvY2tlZCBpdHMNCj4gLQkgKiB0YXJnZXQgem9u ZS4gSWYgdGhpcyBpcyB0aGUgY2FzZSwgcmVsZWFzZSB0aGUgcmVxdWVzdCB6b25lIGxvY2suDQo+ ICsJICogdGFyZ2V0IHpvbmUuIElmIHRoaXMgaXMgdGhlIGNhc2UsIHJlbGVhc2UgdGhlIHpvbmUg bG9jay4NCj4gIAkgKi8NCj4gIAlpZiAoZGVhZGxpbmVfcmVxdWVzdF9oYXNfem9uZV93bG9jayhy cSkpDQo+ICAJCWRlYWRsaW5lX3d1bmxvY2tfem9uZShkZCwgcnEpOw0KDQpDYW4gdGhpcyBjaGFu Z2UgYmUgZm9sZGVkIGludG8gdGhlIHBhdGNoIHRoYXQgaW50cm9kdWNlZCB0aGF0IGNvbW1lbnQ/ DQoNCj4gQEAgLTU3MCw2ICs2MjEsOSBAQCBzdGF0aWMgdm9pZCBkZF9pbnNlcnRfcmVxdWVzdChz dHJ1Y3QgYmxrX21xX2h3X2N0eCAqaGN0eCwgc3RydWN0IHJlcXVlc3QgKnJxLA0KPiAgDQo+ICAJ YmxrX21xX3NjaGVkX3JlcXVlc3RfaW5zZXJ0ZWQocnEpOw0KPiAgDQo+ICsJaWYgKGF0X2hlYWQg JiYgZGVhZGxpbmVfcmVxdWVzdF9uZWVkc196b25lX3dsb2NrKGRkLCBycSkpDQo+ICsJCXByX2lu Zm8oIiMjIyMjIyMjIFdyaXRlIGF0IGhlYWQgIVxuIik7DQo+ICsNCj4gIAlpZiAoYXRfaGVhZCB8 fCBibGtfcnFfaXNfcGFzc3Rocm91Z2gocnEpKSB7DQo+ICAJCWlmIChhdF9oZWFkKQ0KPiAgCQkJ bGlzdF9hZGQoJnJxLT5xdWV1ZWxpc3QsICZkZC0+ZGlzcGF0Y2gpOw0KDQpXaWxsIGl0IGJlIGVh c3kgdG8gdXNlcnMgd2hvIGFuYWx5emUgYSBrZXJuZWwgbG9nIHRvIGZpZ3VyZSBvdXQgd2h5IHRo YXQNCm1lc3NhZ2UgaGFzIGJlZW4gZ2VuZXJhdGVkPyBTaG91bGQgdGhhdCBtZXNzYWdlIHBlcmhh cHMgaW5jbHVkZSB0aGUgYmxvY2sNCmRldmljZSBuYW1lLCB6b25lIG51bWJlciBhbmQgcmVxdWVz dCBzZWN0b3IgbnVtYmVyPw0KDQpUaGFua3MsDQoNCkJhcnQu