From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Bart Van Assche To: "hare@suse.de" , "axboe@kernel.dk" CC: "hch@lst.de" , "linux-block@vger.kernel.org" , "osandov@fb.com" , "jthumshirn@suse.de" Subject: Re: [PATCH v2 2/2] blk-mq: Fix a race condition in blk_mq_mark_tag_wait() Date: Thu, 11 Jan 2018 17:27:24 +0000 Message-ID: <1515691643.2752.27.camel@wdc.com> References: <20180110193919.6886-1-bart.vanassche@wdc.com> <20180110193919.6886-3-bart.vanassche@wdc.com> In-Reply-To: Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 List-ID: T24gVGh1LCAyMDE4LTAxLTExIGF0IDA4OjM5ICswMTAwLCBIYW5uZXMgUmVpbmVja2Ugd3JvdGU6 DQo+IEknbSBhY3R1YWxseSBub3QgdGhhdCBjb252aW5jZWQgd2l0aCB0aGlzIGNoYW5nZTsgb3Jp Z2luYWxseSB3ZSBoYWQgYmVlbg0KPiBjaGVja2luZyBpZiBpdCdzIG9uIHRoZSB3YWl0IGxpc3Qs IGFuZCBvbmx5IF90aGVuXyBjYWxsIGJ0X3dhaXRfcHRyKCkuDQo+IE5vdyB3ZSBjYWxsIGJ0X3dh aXRfcHRyKCkgYWx3YXlzLCBtZWFuaW5nIHdlIHJ1biBhIGNoYW5jZSBvZiBpbmNyZWFzaW5nDQo+ IHRoZSBiaXRtYXBfdGFncyB3YWl0IHBvaW50ZXIgd2l0aG91dCBhY3R1YWxseSB1c2luZyBpdC4N Cj4gTG9va2luZyBhdCB0aGUgY29kZSBJJ20gbm90IHN1cmUgdGhpcyBpcyB0aGUgY29ycmVjdCB3 YXkgb2YgdXNpbmcgaXQgLi4uDQoNCkhlbGxvIEhhbm5lcywNCg0KQXJlIHlvdSBwZXJoYXBzIHJl ZmVycmluZyB0byBzYnFfaW5kZXhfYXRvbWljX2luYygpPyBJIHRoaW5rIGl0J3MgZmluZSB0bw0K Y2FsbCBidF93YWl0X3B0cigpIGV2ZW4gaWYgdGhlIGNvcnJlc3BvbmRpbmcgd2FpdHF1ZXVlIHdv bid0IGJlIHVzZWQuIE15DQp1bmRlcnN0YW5kaW5nIGlzIHRoYXQgdGhlIHB1cnBvc2Ugb2YgaGF2 aW5nIG11bHRpcGxlIHdhaXRxdWV1ZXMgYW5kIG9mDQp1c2luZyB0aGVzZSBpbiBhIHJvdW5kLXJv YmluIGZhc2hpb24gaXMgdG8gYXZvaWQgdGhhdCBpZiBsZXNzIHRoYW4gb3IgZXF1YWwNCnRvIDgg KFNCUV9XQUlUX1FVRVVFUykgdGhyZWFkcyBhcmUgd2FpdGluZyBmb3IgYSB0YWcgdGhhdCB0aGVz ZSB3b24ndCB1c2UNCnRoZSBzYW1lIHdhaXQgcXVldWUuIFNvIGluIHRoZSB1bmxpa2VseSBldmVu dCBvZiBhbiBlYXJseSByZXR1cm4gdGhlIHdvcnN0DQp0aGF0IGNhbiBoYXBwZW4gaXMgdGhhdCB0 aGVyZSBpcyBtb3JlIGNvbnRlbnRpb24gb24gb25lIG9mIHRoZSBlaWdodCB3YWl0DQpxdWV1ZXMu IEJ1dCBzaW5jZSB0aGF0IGlzIGFuIHVubGlrZWx5IHNjZW5hcmlvIEkgZG9uJ3QgdGhpbmsgd2Ug aGF2ZSB0bw0Kd29ycnkgYWJvdXQgdGhpcy4NCg0KQmFydC4=