From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from esa4.hgst.iphmx.com ([216.71.154.42]:9578 "EHLO esa4.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750791AbdE1QKM (ORCPT ); Sun, 28 May 2017 12:10:12 -0400 From: Bart Van Assche To: "ming.lei@redhat.com" CC: "hch@infradead.org" , "linux-block@vger.kernel.org" , "axboe@fb.com" Subject: Re: [PATCH v2 4/8] blk-mq: fix blk_mq_quiesce_queue Date: Sun, 28 May 2017 16:10:09 +0000 Message-ID: <1495987808.2849.5.camel@sandisk.com> References: <20170527142126.26079-1-ming.lei@redhat.com> <20170527142126.26079-5-ming.lei@redhat.com> <1495921605.13651.2.camel@sandisk.com> <20170528104400.GB6488@ming.t460p> In-Reply-To: <20170528104400.GB6488@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 T24gU3VuLCAyMDE3LTA1LTI4IGF0IDE4OjQ0ICswODAwLCBNaW5nIExlaSB3cm90ZToNCj4gT24g U2F0LCBNYXkgMjcsIDIwMTcgYXQgMDk6NDY6NDVQTSArMDAwMCwgQmFydCBWYW4gQXNzY2hlIHdy b3RlOg0KPiA+IE9uIFNhdCwgMjAxNy0wNS0yNyBhdCAyMjoyMSArMDgwMCwgTWluZyBMZWkgd3Jv dGU6DQo+ID4gPiAgYm9vbCBibGtfbXFfY2FuX3F1ZXVlKHN0cnVjdCBibGtfbXFfaHdfY3R4ICpo Y3R4KQ0KPiA+ID4gQEAgLTExMDgsMTMgKzExMTksMTUgQEAgc3RhdGljIHZvaWQgX19ibGtfbXFf cnVuX2h3X3F1ZXVlKHN0cnVjdCBibGtfbXFfaHdfY3R4ICpoY3R4KQ0KPiA+ID4gIA0KPiA+ID4g IAlpZiAoIShoY3R4LT5mbGFncyAmIEJMS19NUV9GX0JMT0NLSU5HKSkgew0KPiA+ID4gIAkJcmN1 X3JlYWRfbG9jaygpOw0KPiA+ID4gLQkJYmxrX21xX3NjaGVkX2Rpc3BhdGNoX3JlcXVlc3RzKGhj dHgpOw0KPiA+ID4gKwkJaWYgKCFibGtfcXVldWVfcXVpZXNjZWQoaGN0eC0+cXVldWUpKQ0KPiA+ ID4gKwkJCWJsa19tcV9zY2hlZF9kaXNwYXRjaF9yZXF1ZXN0cyhoY3R4KTsNCj4gPiA+ICAJCXJj dV9yZWFkX3VubG9jaygpOw0KPiA+ID4gIAl9IGVsc2Ugew0KPiA+ID4gIAkJbWlnaHRfc2xlZXAo KTsNCj4gPiA+ICANCj4gPiA+ICAJCXNyY3VfaWR4ID0gc3JjdV9yZWFkX2xvY2soJmhjdHgtPnF1 ZXVlX3JxX3NyY3UpOw0KPiA+ID4gLQkJYmxrX21xX3NjaGVkX2Rpc3BhdGNoX3JlcXVlc3RzKGhj dHgpOw0KPiA+ID4gKwkJaWYgKCFibGtfcXVldWVfcXVpZXNjZWQoaGN0eC0+cXVldWUpKQ0KPiA+ ID4gKwkJCWJsa19tcV9zY2hlZF9kaXNwYXRjaF9yZXF1ZXN0cyhoY3R4KTsNCj4gPiA+ICAJCXNy Y3VfcmVhZF91bmxvY2soJmhjdHgtPnF1ZXVlX3JxX3NyY3UsIHNyY3VfaWR4KTsNCj4gPiA+ICAJ fQ0KPiA+ID4gIH0NCj4gPiANCj4gPiBTb3JyeSBidXQgSSBkb24ndCBsaWtlIHRoZXNlIGNoYW5n ZXMuIFdoeSBoYXZlIHRoZSBibGtfcXVldWVfcXVpZXNjZWQoKQ0KPiA+IGNhbGxzIGJlIGFkZGVk IGF0IG90aGVyIGNvZGUgbG9jYXRpb25zIHRoYW4gdGhlIGJsa19tcV9oY3R4X3N0b3BwZWQoKSBj YWxscz8NCj4gPiBUaGlzIHdpbGwgbWFrZSB0aGUgYmxvY2sgbGF5ZXIgdW5uZWNlc3NhcnkgaGFy ZCB0byBtYWludGFpbi4gUGxlYXNlIGNvbnNpZGVyDQo+ID4gdG8gY2hhbmdlIHRoZSBibGtfbXFf aGN0eF9zdG9wcGVkKGhjdHgpIGNhbGxzIGluIGJsa19tcV9zY2hlZF9kaXNwYXRjaF9yZXF1ZXN0 cygpDQo+ID4gYW5kICpibGtfbXFfKnJ1bl9od19xdWV1ZSooKSBpbnRvIGJsa19tcV9oY3R4X3N0 b3BwZWQoaGN0eCkgfHwgYmxrX3F1ZXVlX3F1aWVzY2VkKHEpLg0KPiANCj4gT25lIGJlbmVmaXQg aXMgdGhhdCB3ZSBtYWtlIGl0IGV4cGxpY2l0IHRoYXQgdGhlIGZsYWcgaGFzIHRvIGJlIGNoZWNr ZWQNCj4gaW5zaWRlIHRoZSBSQ1UgcmVhZC1zaWRlIGNyaXRpY2FsIHNlY3Rpb25zLiBJZiB5b3Ug cHV0IGl0IHNvbWV3aGVyZSwNCj4gc29tZW9uZSBtYXkgcHV0IGl0IG91dCBvZiByZWFkLXNpZGUg Y3JpdGljYWwgc2VjdGlvbnMgaW4gZnV0dXJlLg0KDQpIZWxsbyBNaW5nLA0KDQpJIHJlYWxseSB3 b3VsZCBsaWtlIHRvIHNlZSB0aGUgYmxrX3F1ZXVlX3F1aWVzY2VkKCkgdGVzdHMgYXMgY2xvc2Ug YXMgcG9zc2libGUgdG8NCnRoZSBibGtfbXFfaGN0eF9zdG9wcGVkKCkgdGVzdHMuIEJ1dCBJIGFn cmVlIHRoYXQgd2UgbmVlZCBhIHdheSB0byBkb2N1bWVudCBhbmQvb3INCnZlcmlmeSB0aGF0IHRo ZXNlIHRlc3RzIG9jY3VyIHdpdGggYW4gUkNVIHJlYWQtc2lkZSBsb2NrIGhlbGQuIEhhdmUgeW91 IGNvbnNpZGVyZWQNCnRvIHVzZSByY3VfcmVhZF9sb2NrX2hlbGQoKSB0byBkb2N1bWVudCB0aGlz Pw0KDQpUaGFua3MsDQoNCkJhcnQu