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: Tue, 19 Sep 2017 15:05:32 +0000 Message-ID: <1505833531.2671.7.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> <1505776477.12701.28.camel@wdc.com> <20170919015533.GC4671@localhost.localdomain> In-Reply-To: <20170919015533.GC4671@localhost.localdomain> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 List-ID: T24gTW9uLCAyMDE3LTA5LTE4IGF0IDIxOjU1IC0wNDAwLCBLZWl0aCBCdXNjaCB3cm90ZToNCj4g VGhlIG9ubHkgd2F5IHRvIGNvbXBsZXRlIHRoYXQgcmVxdWVzdCBub3cgaXMgaWYgdGhlIHRpbWVv dXQNCj4gaGFuZGxlciByZXR1cm5zIEJMS19FSF9IQU5ETEVELCBidXQgdGhlIHNjc2ktbXEgYWJv cnQgcGF0aCByZXR1cm5zDQo+IEJMS19FSF9OT1RfSEFORExFRCBvbiBzdWNjZXNzICh2ZXJ5IGZl dyBkcml2ZXJzIGFjdHVhbGx5IHJldHVybg0KPiBCTEtfRUhfSEFORExFRCkuDQo+IA0KPiBBZnRl ciB0aGUgdGltZW91dCBoYW5kbGVyIHJ1bnMsIGl0J3Mgb25jZSBhZ2FpbiBwb3NzaWJsZSBmb3Ig dGhlIGRyaXZlciB0bw0KPiBjb21wbGV0ZSB0aGUgcmVxdWVzdCBpZiBpdCByZXR1cm5lZCBCTEtf RUhfUkVTRVRfVElNRVIsIGJ1dCBpZiB0aGUgZHJpdmVyDQo+IGFscmVhZHkgY29tcGxldGVkIHRo ZSBjb21tYW5kIGR1cmluZyB0aGUgdGltZW91dCBoYW5kbGVyLCBob3cgaXMgdGhlDQo+IGRyaXZl ciBzdXBwb3NlZCB0byBrbm93IGl0IG5lZWRzIHRvIGNvbXBsZXRlIHRoZSByZXF1ZXN0IGEgc2Vj b25kIHRpbWU/DQoNCkhlbGxvIEtlaXRoLA0KDQpJZiB5b3UgaGF2ZSBhIGxvb2sgYXQgc2NtZF9l aF9hYm9ydF9oYW5kbGVyKCkgdGhlbiB5b3Ugd2lsbCBzZWUgdGhhdCBpdCBlaXRoZXINCmNhbGxz IHNjc2lfcXVldWVfaW5zZXJ0KCksIHNjc2lfZmluaXNoX2NvbW1hbmQoKSBvciBzY3NpX2VoX3Nj bWRfYWRkKCkuDQpzY3NpX3F1ZXVlX2luc2VydCgpIHJlaW5zZXJ0cyB0aGUgcmVxdWVzdC4gc2Nz aV9laF9zY21kX2FkZCgpIHdha2VzIHVwIHRoZQ0KZXJyb3IgaGFuZGxlciB0aHJlYWQgdG8gcGVy Zm9ybSBmdXJ0aGVyIGVycm9yIGhhbmRsaW5nIGVzY2FsYXRpb24uDQpzY3NpX2ZpbmlzaF9jb21t YW5kKCkgY2FsbHMgc2NzaV9lbmRfcmVxdWVzdCgpLiBUaGF0IGxhc3QgZnVuY3Rpb24gaW4gdHVy bg0KY2FsbHMgX19ibGtfbXFfZW5kX3JlcXVlc3QoKS4gX19ibGtfbXFfZW5kX3JlcXVlc3QoKSBk b2VzIG5vdCBjaGVjaw0KUkVRX0FUT01fQ09NUExFVEUuIFNvcnJ5IGJ1dCB0aGUgc3VtbWFyeSBp cyB0aGF0IEkgZG8gbm90IGFncmVlIHdpdGggeW91DQp0aGF0IHRoZSBTQ1NJIGNvcmUgY2FuIGxv c2UgcmVxdWVzdHMuDQoNCkJhcnQu