From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Bart Van Assche To: "ming.lei@redhat.com" CC: "hch@lst.de" , "hare@suse.de" , "linux-block@vger.kernel.org" , "osandov@fb.com" , "jthumshirn@suse.de" , "axboe@kernel.dk" Subject: Re: [PATCH 4/7] blk-mq: Avoid that request processing stalls when sharing tags Date: Fri, 1 Dec 2017 19:52:14 +0000 Message-ID: <1512157932.2520.27.camel@wdc.com> References: <20171201000848.2656-1-bart.vanassche@wdc.com> <20171201000848.2656-5-bart.vanassche@wdc.com> <20171201025803.GA29741@ming.t460p> In-Reply-To: <20171201025803.GA29741@ming.t460p> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 List-ID: T24gRnJpLCAyMDE3LTEyLTAxIGF0IDEwOjU4ICswODAwLCBNaW5nIExlaSB3cm90ZToNCj4gT24g VGh1LCBOb3YgMzAsIDIwMTcgYXQgMDQ6MDg6NDVQTSAtMDgwMCwgQmFydCBWYW4gQXNzY2hlIHdy b3RlOg0KPiA+IGJsa19tcV9zY2hlZF9tYXJrX3Jlc3RhcnRfaGN0eCgpIG11c3QgYmUgY2FsbGVk IGJlZm9yZQ0KPiANCj4gQ291bGQgeW91IHBsZWFzZSBkZXNjcmliZSB0aGUgdGhlb3J5IG9uIGNv bW1pdCBsb2c/IExpa2UsIHdoeSBpcyBpdA0KPiBhIG11c3Q/IGFuZCB3aGF0IGlzIHRoZSBpc3N1 ZSB0byBiZSBmaXhlZD8gDQoNClRoZSBCTEtfTVFfU19TQ0hFRF9SRVNUQVJUIHRlc3QgYXQgdGhl IGVuZCBvZiBibGtfbXFfZGlzcGF0Y2hfcnFfbGlzdCgpIGNhbg0Kb25seSB3b3JrIGlmIEJMS19N UV9TX1NDSEVEX1JFU1RBUlQgaXMgc2V0IGJlZm9yZSBibGtfbXFfZGlzcGF0Y2hfcnFfbGlzdCgp DQppcyBjYWxsZWQuIEJUVywgd2l0aG91dCB0aGlzIHBhdGNoIGV2ZXJ5IGl0ZXJhdGlvbiBvZiBt eSB0ZXN0IHRyaWdnZXJzIGENCnF1ZXVlIHN0YWxsLiBXaXRoIHRoaXMgcGF0Y2ggYSBxdWV1ZSBz dGFsbCBvbmx5IG9jY3VycyBzcG9yYWRpY2FsbHkgc28gSQ0KdGhpbmsgd2UgcmVhbGx5IG5lZWQg c29tZXRoaW5nIGxpa2UgdGhpcyBwYXRjaC4NCg0KPiA+IGJsa19tcV9kaXNwYXRjaF9ycV9saXN0 KCkgaXMgY2FsbGVkLiBNYWtlIHN1cmUgdGhhdA0KPiA+IEJMS19NUV9TX1NDSEVEX1JFU1RBUlQg aXMgc2V0IGJlZm9yZSBhbnkgYmxrX21xX2Rpc3BhdGNoX3JxX2xpc3QoKQ0KPiA+IGNhbGwgb2Nj dXJzLg0KPiA+IA0KPiA+IEZpeGVzOiBjb21taXQgYjM0NzY4OWZmYmNhICgiYmxrLW1xLXNjaGVk OiBpbXByb3ZlIGRpc3BhdGNoaW5nIGZyb20gc3cgcXVldWUiKQ0KPiANCj4gV2UgYWx3YXlzIG1h cmsgUkVTVEFSVCBzdGF0ZSBiaXQganVzdCBiZWZvcmUgZGlzcGF0Y2hpbmcgZnJvbSAtPmRpc3Bh dGNoX2xpc3QsDQo+IHRoaXMgd2F5IGhhcyBiZWVuIHRoZXJlIGJlZm9yZSBiMzQ3Njg5ZmZiY2Es IHdoaWNoIGRvZXNuJ3QgY2hhbmdlIHRoaXMNCj4gUkVTVEFSVCBtZWNoYW5pc20sIHNvIHBsZWFz ZSBleHBsYWluIGEgYml0IHdoeSBpdCBpcyBhIGZpeCBvbiBjb21taXQNCj4gYjM0NzY4OWZmYmNh Lg0KDQpJJ20gbm90IGNvbXBsZXRlbHkgc3VyZSB3aGljaCBwYXRjaCBpbnRyb2R1Y2VkIHRoZSBs b2NrdXAgZml4ZWQgYnkgdGhpcyBwYXRjaA0KYnV0IEkgd2lsbCBoYXZlIGFub3RoZXIgbG9vayB3 aGV0aGVyIHRoaXMgd2FzIHJlYWxseSBpbnRyb2R1Y2VkIGJ5IGNvbW1pdA0KYjM0NzY4OWZmYmNh Lg0KDQpCYXJ0Lg==