From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Bart Van Assche To: "keith.busch@intel.com" CC: "hch@lst.de" , "linux-block@vger.kernel.org" , "axboe@kernel.dk" Subject: Re: [RFC PATCH] blk-mq: Fix lost request during timeout Date: Mon, 18 Sep 2017 22:53:12 +0000 Message-ID: <1505775191.12701.20.camel@wdc.com> References: <1505772186-4601-1-git-send-email-keith.busch@intel.com> <1505772477.12701.6.camel@wdc.com> <20170918223900.GA4671@localhost.localdomain> In-Reply-To: <20170918223900.GA4671@localhost.localdomain> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 List-ID: T24gTW9uLCAyMDE3LTA5LTE4IGF0IDE4OjM5IC0wNDAwLCBLZWl0aCBCdXNjaCB3cm90ZToNCj4g VGhlIG52bWUgZHJpdmVyJ3MgdXNlIG9mIGJsa19tcV9yZWluaXRfdGFnc2V0IG9ubHkgaGFwcGVu cyBkdXJpbmcNCj4gY29udHJvbGxlciBpbml0aWFsaXNhdGlvbiwgYnV0IEknbSBzZWVpbmcgbG9z dCBjb21tYW5kcyB3ZWxsIGFmdGVyIHRoYXQNCj4gZHVyaW5nIG5vcm1hbCBhbmQgc3RhYmxlIHJ1 bm5pbmcuDQo+IA0KPiBUaGUgdGltaW5nIGlzIHByZXR0eSBuYXJyb3cgdG8gaGl0LCBidXQgSSdt IHByZXR0eSBzdXJlIHRoaXMgaXMgd2hhdCdzDQo+IGhhcHBlbmluZy4gRm9yIG52bWUsIHRoaXMg b2NjdXJzIHdoZW4gbnZtZV90aW1lb3V0KCkgcnVucyBjb25jdXJyZW50bHkNCj4gd2l0aCBudm1l X2hhbmRsZV9jcWUoKSBmb3IgdGhlIHNhbWUgc3RydWN0IHJlcXVlc3QuIEZvciBzY3NpLW1xLA0K PiB0aGUgc2FtZSBzaXR1YXRpb24gbWF5IGFyaXNlIGlmIHNjc2lfbXFfZG9uZSgpIHJ1bnMgY29u Y3VycmVudGx5IHdpdGgNCj4gc2NzaV90aW1lc19vdXQoKS4NCg0KSGVsbG8gS2VpdGgsDQoNCkFy ZSB5b3Ugc3VyZSB0aGF0IHNjZW5hcmlvIGNhbiBoYXBwZW4/IFRoZSBibGstbXEgY29yZSBjYWxs cyB0ZXN0X2FuZF9zZXRfYml0KCkNCmZvciB0aGUgUkVRX0FUT01fQ09NUExFVEUgZmxhZyBiZWZv cmUgYW55IGNvbXBsZXRpb24gb3IgdGltZW91dCBoYW5kbGVyIGlzDQpjYWxsZWQuIFNlZSBhbHNv IGJsa19tYXJrX3JxX2NvbXBsZXRlKCkuIFRoaXMgYXZvaWRzIHRoYXQgdGhlIC5jb21wbGV0ZSgp IGFuZA0KLnRpbWVvdXQoKSBmdW5jdGlvbnMgcnVuIGNvbmN1cnJlbnRseS4NCg0KSW4gY2FzZSB0 aGlzIHdvdWxkbid0IGJlIGNsZWFyLCBhIGJsb2NrIGRyaXZlciBtdXN0IG5vdCBjYWxsDQpibGtf bXFfZW5kX3JlcXVlc3QoKSBhZnRlciB0aGUgdGltZW91dCBoYW5kbGVyIGhhcyBmaW5pc2hlZCBi ZWNhdXNlIHRoYXQgd291bGQNCnRyaWdnZXIgYSB1c2UtYWZ0ZXItZnJlZSBvZiBhIHJlcXVlc3Qg c3RydWN0dXJlLg0KDQpJIG5vdGljZWQgdGhhdCB5b3VyIHBhdGNoIGluY2x1ZGVzIGNoYW5nZXMg Zm9yIGJsa19tcV9zdGFydF9yZXF1ZXN0KCkuIE5vDQp0aW1lb3V0IG9yIGNvbXBsZXRpb24gaGFu ZGxlciBzaG91bGQgYmUgcnVubmluZyB3aGlsZSBibGtfbXFfc3RhcnRfcmVxdWVzdCgpIGlzDQpi ZWluZyBleGVjdXRlZC4gSWYgdGhlc2UgY2hhbmdlcyBtYWtlIGEgZGlmZmVyZW5jZSBpbiB5b3Vy IHRlc3RzIHRoZW4gSSB0aGluaw0KdGhhdCBtZWFucyB0aGF0IHRoZXJlIGlzIHNvbWV0aGluZyB3 cm9uZyB3aXRoIHRoZSBOVk1lIGRyaXZlci4NCg0KQmFydC4=