From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Bart Van Assche To: "hch@lst.de" , "keith.busch@intel.com" , "linux-nvme@lists.infradead.org" , "linux-block@vger.kernel.org" , "axboe@kernel.dk" , "ming.lei@redhat.com" Subject: Re: [RFC PATCH 3/3] blk-mq: Remove generation seqeunce Date: Thu, 12 Jul 2018 18:16:12 +0000 Message-ID: References: <20180521231131.6685-1-keith.busch@intel.com> <20180521231131.6685-4-keith.busch@intel.com> In-Reply-To: <20180521231131.6685-4-keith.busch@intel.com> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 List-ID: T24gTW9uLCAyMDE4LTA1LTIxIGF0IDE3OjExIC0wNjAwLCBLZWl0aCBCdXNjaCB3cm90ZToNCj4g IAkvKg0KPiAtCSAqIFdlIG1hcmtlZCBAcnEtPmFib3J0ZWRfZ3N0YXRlIGFuZCB3YWl0ZWQgZm9y IFJDVS4gIElmIHRoZXJlIHdlcmUNCj4gLQkgKiBjb21wbGV0aW9ucyB0aGF0IHdlIGxvc3QgdG8s IHRoZXkgd291bGQgaGF2ZSBmaW5pc2hlZCBhbmQNCj4gLQkgKiB1cGRhdGVkIEBycS0+Z3N0YXRl IGJ5IG5vdzsgb3RoZXJ3aXNlLCB0aGUgY29tcGxldGlvbiBwYXRoIGlzDQo+IC0JICogbm93IGd1 YXJhbnRlZWQgdG8gc2VlIEBycS0+YWJvcnRlZF9nc3RhdGUgYW5kIHlpZWxkLiAgSWYNCj4gLQkg KiBAcnEtPmFib3J0ZWRfZ3N0YXRlIHN0aWxsIG1hdGNoZXMgQHJxLT5nc3RhdGUsIEBycSBpcyBv dXJzLg0KPiArCSAqIEp1c3QgZG8gYSBxdWljayBjaGVjayBpZiBpdCBpcyBleHBpcmVkIGJlZm9y ZSBsb2NraW5nIHRoZSByZXF1ZXN0IGluDQo+ICsJICogc28gd2UncmUgbm90IHVubmVjZXNzYXJp bGx5IHN5bmNocm9uaXppbmcgYWNyb3NzIENQVXMuDQo+ICAJICovDQo+IC0JaWYgKCEocnEtPnJx X2ZsYWdzICYgUlFGX01RX1RJTUVPVVRfRVhQSVJFRCkgJiYNCj4gLQkgICAgUkVBRF9PTkNFKHJx LT5nc3RhdGUpID09IHJxLT5hYm9ydGVkX2dzdGF0ZSkNCj4gKwlpZiAoIWJsa19tcV9yZXFfZXhw aXJlZChycSwgbmV4dCkpDQo+ICsJCXJldHVybjsNCj4gKw0KPiArCS8qDQo+ICsJICogV2UgaGF2 ZSByZWFzb24gdG8gYmVsaWV2ZSB0aGUgcmVxdWVzdCBtYXkgYmUgZXhwaXJlZC4gVGFrZSBhDQo+ ICsJICogcmVmZXJlbmNlIG9uIHRoZSByZXF1ZXN0IHRvIGxvY2sgdGhpcyByZXF1ZXN0IGxpZmV0 aW1lIGludG8gaXRzDQo+ICsJICogY3VycmVudGx5IGFsbG9jYXRlZCBjb250ZXh0IHRvIHByZXZl bnQgaXQgZnJvbSBiZWluZyByZWFsbG9jYXRlZCBpbg0KPiArCSAqIHRoZSBldmVudCB0aGUgY29t cGxldGlvbiBieS1wYXNzZXMgdGhpcyB0aW1lb3V0IGhhbmRsZXIuDQo+ICsJICogDQo+ICsJICog SWYgdGhlIHJlZmVyZW5jZSB3YXMgYWxyZWFkeSByZWxlYXNlZCwgdGhlbiB0aGUgZHJpdmVyIGJl YXQgdGhlDQo+ICsJICogdGltZW91dCBoYW5kbGVyIHRvIHBvc3RpbmcgYSBuYXR1cmFsIGNvbXBs ZXRpb24uDQo+ICsJICovDQo+ICsJaWYgKCFrcmVmX2dldF91bmxlc3NfemVybygmcnEtPnJlZikp DQo+ICsJCXJldHVybjsNCj4gKw0KPiArCS8qDQo+ICsJICogVGhlIHJlcXVlc3QgaXMgbm93IGxv Y2tlZCBhbmQgY2Fubm90IGJlIHJlYWxsb2NhdGVkIHVuZGVybmVhdGggdGhlDQo+ICsJICogdGlt ZW91dCBoYW5kbGVyJ3MgcHJvY2Vzc2luZy4gUmUtdmVyaWZ5IHRoaXMgZXhhY3QgcmVxdWVzdCBp cyB0cnVseQ0KPiArCSAqIGV4cGlyZWQ7IGlmIGl0IGlzIG5vdCBleHBpcmVkLCB0aGVuIHRoZSBy ZXF1ZXN0IHdhcyBjb21wbGV0ZWQgYW5kDQo+ICsJICogcmVhbGxvY2F0ZWQgYXMgYSBuZXcgcmVx dWVzdC4NCj4gKwkgKi8NCj4gKwlpZiAoYmxrX21xX3JlcV9leHBpcmVkKHJxLCBuZXh0KSkNCj4g IAkJYmxrX21xX3JxX3RpbWVkX291dChycSwgcmVzZXJ2ZWQpOw0KPiArCWJsa19tcV9wdXRfcmVx dWVzdChycSk7DQo+ICB9DQoNCkhlbGxvIEtlaXRoIGFuZCBDaHJpc3RvcGgsDQoNCldoYXQgcHJl dmVudHMgdGhhdCBhIHJlcXVlc3QgZmluaXNoZXMgYW5kIGdldHMgcmV1c2VkIGFmdGVyIHRoZQ0K YmxrX21xX3JlcV9leHBpcmVkKCkgY2FsbCBoYXMgZmluaXNoZWQgYW5kIGJlZm9yZSBrcmVmX2dl dF91bmxlc3NfemVybygpIGlzDQpjYWxsZWQ/IElzIHRoaXMgcGVyaGFwcyBhIHJhY2UgY29uZGl0 aW9uIHRoYXQgaGFzIG5vdCB5ZXQgYmVlbiB0cmlnZ2VyZWQgYnkNCmFueSBleGlzdGluZyBibG9j ayBsYXllciB0ZXN0PyBQbGVhc2Ugbm90ZSB0aGF0IHRoZXJlIGlzIG5vIHN1Y2ggcmFjZQ0KY29u ZGl0aW9uIGluIHRoZSBwYXRjaCBJIGhhZCBwb3N0ZWQgKCJibGstbXE6IFJld29yayBibGstbXEg dGltZW91dCBoYW5kbGluZw0KYWdhaW4iIC0gaHR0cHM6Ly93d3cuc3Bpbmljcy5uZXQvbGlzdHMv bGludXgtYmxvY2svbXNnMjY0ODkuaHRtbCkuDQoNClRoYW5rcywNCg0KQmFydC4NCg0KDQoNCg0K