From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from esa6.hgst.iphmx.com ([216.71.154.45]:35207 "EHLO esa6.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750784AbeASAVp (ORCPT ); Thu, 18 Jan 2018 19:21:45 -0500 From: Bart Van Assche To: "ming.lei@redhat.com" CC: "dm-devel@redhat.com" , "linux-block@vger.kernel.org" , "snitzer@redhat.com" Subject: Re: [PATCH] dm rq: Avoid that request processing stalls sporadically Date: Fri, 19 Jan 2018 00:21:43 +0000 Message-ID: <1516321302.2676.105.camel@wdc.com> References: <20180118163707.11825-1-bart.vanassche@wdc.com> <20180119001136.GA4712@ming.t460p> <1516320863.2676.104.camel@wdc.com> <20180119001834.GB4712@ming.t460p> In-Reply-To: <20180119001834.GB4712@ming.t460p> 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 T24gRnJpLCAyMDE4LTAxLTE5IGF0IDA4OjE4ICswODAwLCBNaW5nIExlaSB3cm90ZToNCj4gT24g RnJpLCBKYW4gMTksIDIwMTggYXQgMTI6MTQ6MjRBTSArMDAwMCwgQmFydCBWYW4gQXNzY2hlIHdy b3RlOg0KPiA+IE9uIEZyaSwgMjAxOC0wMS0xOSBhdCAwODoxMSArMDgwMCwgTWluZyBMZWkgd3Jv dGU6DQo+ID4gPiBPbiBUaHUsIEphbiAxOCwgMjAxOCBhdCAwODozNzowN0FNIC0wODAwLCBCYXJ0 IFZhbiBBc3NjaGUgd3JvdGU6DQo+ID4gPiA+IGRpZmYgLS1naXQgYS9kcml2ZXJzL21kL2RtLXJx LmMgYi9kcml2ZXJzL21kL2RtLXJxLmMNCj4gPiA+ID4gaW5kZXggZjE2MDk2YWY4NzlhLi5jNTlj NTljZmQyYTUgMTAwNjQ0DQo+ID4gPiA+IC0tLSBhL2RyaXZlcnMvbWQvZG0tcnEuYw0KPiA+ID4g PiArKysgYi9kcml2ZXJzL21kL2RtLXJxLmMNCj4gPiA+ID4gQEAgLTc2MSw2ICs3NjEsNyBAQCBz dGF0aWMgYmxrX3N0YXR1c190IGRtX21xX3F1ZXVlX3JxKHN0cnVjdCBibGtfbXFfaHdfY3R4ICpo Y3R4LA0KPiA+ID4gPiAgCQkvKiBVbmRvIGRtX3N0YXJ0X3JlcXVlc3QoKSBiZWZvcmUgcmVxdWV1 aW5nICovDQo+ID4gPiA+ICAJCXJxX2VuZF9zdGF0cyhtZCwgcnEpOw0KPiA+ID4gPiAgCQlycV9j b21wbGV0ZWQobWQsIHJxX2RhdGFfZGlyKHJxKSwgZmFsc2UpOw0KPiA+ID4gPiArCQlibGtfbXFf ZGVsYXlfcnVuX2h3X3F1ZXVlKGhjdHgsIDEwMC8qbXMqLyk7DQo+ID4gPiA+ICAJCXJldHVybiBC TEtfU1RTX1JFU09VUkNFOw0KPiA+ID4gPiAgCX0NCj4gPiA+ID4gIA0KPiA+ID4gDQo+ID4gPiBO YWsuDQo+ID4gDQo+ID4gVGhpcyBwYXRjaCBmaXhlcyBhIHJlZ3Jlc3Npb24gdGhhdCB3YXMgaW50 cm9kdWNlZCBieSB5b3UuIFlvdSBzaG91bGQga25vdw0KPiA+IHRoYXQgcmVncmVzc2lvbnMgYXJl IG5vdCBhY2NlcHRhYmxlLiBJZiB5b3UgZG9uJ3QgYWdyZWUgd2l0aCB0aGlzIHBhdGNoLA0KPiA+ IHBsZWFzZSBmaXggdGhlIHJvb3QgY2F1c2UuDQo+IA0KPiBZZXN0ZXJkYXkgSSBzZW50IGEgcGF0 Y2gsIGRpZCB5b3UgdGVzdCB0aGF0Pw0KDQpZZXMsIEkgZGlkLiBJdCBjYXVzZWQgcXVldWUgc3Rh bGxzIHRoYXQgd2VyZSBzbyBiYWQgdGhhdCBzZW5kaW5nICJraWNrIiB0byB0aGUNCmRlYnVnZnMg InN0YXRlIiBhdHRyaWJ1dGUgd2FzIG5vdCBzdWZmaWNpZW50IHRvIHJlc29sdmUgdGhlIHF1ZXVl IHN0YWxsLg0KDQpCYXJ0Lg==