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 23:14:38 +0000 Message-ID: <1505776477.12701.28.camel@wdc.com> References: <1505772186-4601-1-git-send-email-keith.busch@intel.com> <1505772477.12701.6.camel@wdc.com> <20170918223900.GA4671@localhost.localdomain> <1505775191.12701.20.camel@wdc.com> <20170918230803.GB4671@localhost.localdomain> In-Reply-To: <20170918230803.GB4671@localhost.localdomain> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 List-ID: T24gTW9uLCAyMDE3LTA5LTE4IGF0IDE5OjA4IC0wNDAwLCBLZWl0aCBCdXNjaCB3cm90ZToNCj4g T24gTW9uLCBTZXAgMTgsIDIwMTcgYXQgMTA6NTM6MTJQTSArMDAwMCwgQmFydCBWYW4gQXNzY2hl IHdyb3RlOg0KPiA+IEFyZSB5b3Ugc3VyZSB0aGF0IHNjZW5hcmlvIGNhbiBoYXBwZW4/IFRoZSBi bGstbXEgY29yZSBjYWxscyB0ZXN0X2FuZF9zZXRfYml0KCkNCj4gPiBmb3IgdGhlIFJFUV9BVE9N X0NPTVBMRVRFIGZsYWcgYmVmb3JlIGFueSBjb21wbGV0aW9uIG9yIHRpbWVvdXQgaGFuZGxlciBp cw0KPiA+IGNhbGxlZC4gU2VlIGFsc28gYmxrX21hcmtfcnFfY29tcGxldGUoKS4gVGhpcyBhdm9p ZHMgdGhhdCB0aGUgLmNvbXBsZXRlKCkgYW5kDQo+ID4gLnRpbWVvdXQoKSBmdW5jdGlvbnMgcnVu IGNvbmN1cnJlbnRseS4NCj4gDQo+IEluZGVlZCB0aGF0IHByZXZlbnRzIC5jb21wbGV0ZSBmcm9t IHJ1bm5pbmcgY29uY3VycmVudGx5IHdpdGggdGhlDQo+IHRpbWVvdXQgaGFuZGxlciwgYnV0IHNj c2lfbXFfZG9uZSBhbmQgbnZtZV9oYW5kbGVfY3FlIGFyZSBub3QgLmNvbXBsZXRlDQo+IGNhbGxi YWNrcy4gVGhlc2UgYXJlIHRoZSBMTEQgZnVuY3Rpb25zIHRoYXQgY2FsbCBibGtfbXFfY29tcGxl dGVfcmVxdWVzdA0KPiB3ZWxsIGJlZm9yZSAuY29tcGxldGUuIElmIHRoZSBkcml2ZXIgY2FsbHMg YmxrX21xX2NvbXBsZXRlX3JlcXVlc3Qgb24NCj4gYSByZXF1ZXN0IHRoYXQgYmxrLW1xIGlzIHRp bWluZyBvdXQsIHRoZSByZXF1ZXN0IGlzIGxvc3QgYmVjYXVzZSBibGstbXENCj4gYWxyZWFkeSBj YWxsZWQgYmxrX21hcmtfcnFfY29tcGxldGUuIE5vdGhpbmcgcHJldmVudHMgdGhlc2UgTExEIGZ1 bmN0aW9ucw0KPiBmcm9tIHJ1bm5pbmcgYXQgdGhlIHNhbWUgdGltZSBhcyB0aGUgdGltZW91dCBo YW5kbGVyLg0KDQpDYW4geW91IGV4cGxhaW4gaG93IHlvdSBkZWZpbmUgInJlcXVlc3QgaXMgbG9z dCI/IElmIGEgdGltZW91dCBvY2N1cnMgZm9yIGENClNDU0kgcmVxdWVzdCB0aGVuIHNjc2lfdGlt ZXNfb3V0KCkgY2FsbHMgc2NzaV9hYm9ydF9jb21tYW5kKCkgKGlmIG5vDQouZWhfdGltZWRfb3V0 KCkgY2FsbGJhY2sgaGFzIGJlZW4gZGVmaW5lZCBieSB0aGUgTExEKS4gSXQgaXMgdGhlIHJlc3Bv bnNpYmlsaXR5DQpvZiB0aGUgU0NTSSBMTEQgdG8gY2FsbCAuc2NzaV9kb25lKCkgYmVmb3JlIGl0 cyAuZWhfYWJvcnRfaGFuZGxlcigpIHJldHVybnMNClNVQ0NFU1MuIElmIC5laF9hYm9ydF9oYW5k bGVyKCkgcmV0dXJucyBhIHZhbHVlIG90aGVyIHRoYW4gU1VDQ0VTUyB0aGVuIHRoZQ0KU0NTSSBj b3JlIHdpbGwgZXNjYWxhdGUgdGhlIGVycm9yIGZ1cnRoZXIgdW50aWwgLnNjc2lfZG9uZSgpIGhh cyBiZWVuIGNhbGxlZCBmb3INCnRoZSBjb21tYW5kIHRoYXQgdGltZWQgb3V0LiBTZWUgYWxzbyBz Y3NpX2Fib3J0X2VoX2NtbmQoKS4gU28gSSB0aGluayB3aGF0IHlvdQ0Kd3JvdGUgaXMgbm90IGNv cnJlY3QgZm9yIHRoZSBTQ1NJIGNvcmUgYW5kIGEgcHJvcGVybHkgaW1wbGVtZW50ZWQgU0NTSSBM TEQuIA0KDQpCYXJ0Lg==