From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from esa3.hgst.iphmx.com ([216.71.153.141]:26390 "EHLO esa3.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750871AbdIOVno (ORCPT ); Fri, 15 Sep 2017 17:43:44 -0400 From: Bart Van Assche To: "dm-devel@redhat.com" , "axboe@fb.com" , "ming.lei@redhat.com" , "snitzer@redhat.com" CC: Bart Van Assche , "hch@infradead.org" , "linux-block@vger.kernel.org" , "loberman@redhat.com" Subject: Re: [PATCH 5/5] dm-mpath: improve I/O schedule Date: Fri, 15 Sep 2017 21:42:55 +0000 Message-ID: <1505511774.2705.3.camel@wdc.com> References: <20170915164456.9803-1-ming.lei@redhat.com> <20170915164456.9803-6-ming.lei@redhat.com> In-Reply-To: <20170915164456.9803-6-ming.lei@redhat.com> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Sender: linux-block-owner@vger.kernel.org List-Id: linux-block@vger.kernel.org T24gU2F0LCAyMDE3LTA5LTE2IGF0IDAwOjQ0ICswODAwLCBNaW5nIExlaSB3cm90ZToNCj4gK3N0 YXRpYyB2b2lkIHNhdmVfcGF0aF9xdWV1ZV9kZXB0aChzdHJ1Y3QgcGdwYXRoICpwKQ0KPiArew0K PiArCXN0cnVjdCByZXF1ZXN0X3F1ZXVlICpxID0gYmRldl9nZXRfcXVldWUocC0+cGF0aC5kZXYt PmJkZXYpOw0KPiArDQo+ICsJcC0+b2xkX25yX3JlcXVlc3RzID0gcS0+bnJfcmVxdWVzdHM7DQo+ ICsJcC0+cXVldWVfZGVwdGggPSBxLT5xdWV1ZV9kZXB0aDsNCj4gKw0KPiArCS8qIG9uZSBleHRy YSByZXF1ZXN0IGZvciBtYWtpbmcgdGhlIHBpcGVsaW5lIGZ1bGwgKi8NCj4gKwlpZiAocC0+cXVl dWVfZGVwdGgpDQo+ICsJCWJsa191cGRhdGVfbnJfcmVxdWVzdHMocSwgcC0+cXVldWVfZGVwdGgg KyAxKTsNCj4gK30NCg0KYmxrX21xX2luaXRfYWxsb2NhdGVkX3F1ZXVlKCkgaW5pdGlhbGl6ZXMg bnJfcmVxdWVzdHMgdG8gdGhlIHRhZyBzZXQgcXVldWUgZGVwdGguDQpEb2VzIHRoYXQgbWVhbiB0 aGF0IHRoZSBhYm92ZSBjb2RlIGluY3JlYXNlcyBucl9yZXF1ZXN0cyBieSBvbmU/IElmIHNvLCBk b2VzDQp0aGF0IGNoYW5nZSBvbmx5IHJlc3VsdCBpbiBhIHBlcmZvcm1hbmNlIGltcHJvdmVtZW50 IGZvciB0aGUgcXVldWUgZGVwdGgNCm1lbnRpb25lZCBpbiB0aGUgcGF0aCBkZXNjcmlwdGlvbiAo Myk/IFNvcnJ5IGJ1dCBJIGRvdWJ0IHRoYXQgdGhpcyBjaGFuZ2Ugd2lsbA0KeWllbGQgYSBzaWdu aWZpY2FudCBpbXByb3ZlbWVudCBmb3IgaGlnaGVyIHF1ZXVlIGRlcHRocy4gRG9lcyB0aGF0IG1l YW4gdGhhdA0KdGhpcyBwYXRjaCBjYW4gYmUgbGVmdCBvdXQ/DQoNClRoYW5rcywNCg0KQmFydC4=