From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Bart Van Assche To: "snitzer@redhat.com" , "elliott@hpe.com" CC: "dm-devel@redhat.com" , "hch@infradead.org" , "linux-block@vger.kernel.org" , "ming.lei@redhat.com" , "martin.petersen@oracle.com" , "axboe@kernel.dk" , "axboe@fb.com" Subject: Re: [PATCH V3 0/5] dm-rq: improve sequential I/O performance Date: Sat, 13 Jan 2018 01:00:57 +0000 Message-ID: <1515805255.2396.94.camel@wdc.com> References: <20180112014232.GB25090@ming.t460p> <20180112015721.GB32298@redhat.com> <20180112033308.GC25090@ming.t460p> <20180112171840.GA4541@redhat.com> <1515778013.2396.3.camel@wdc.com> <20180112174000.GB5134@redhat.com> <1515779211.2396.11.camel@wdc.com> <20180112180635.GD5134@redhat.com> <1515783288.2396.37.camel@wdc.com> <20180113005213.GB7207@redhat.com> In-Reply-To: <20180113005213.GB7207@redhat.com> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 List-ID: T24gRnJpLCAyMDE4LTAxLTEyIGF0IDE5OjUyIC0wNTAwLCBNaWtlIFNuaXR6ZXIgd3JvdGU6DQo+ IEl0IHdhcyA1MCBtcyBiZWZvcmUgaXQgd2FzIDEwMCBtcy4gIE5vIHJlYWwgZXhwbGFpbmF0aW9u IGZvciB0aGVzZQ0KPiB2YWx1ZXMgb3RoZXIgdGhhbiB0aGV5IHNlZW0gdG8gbWFrZSBCYXJ0J3Mg SUIgU1JQIHRlc3RiZWQgaGFwcHk/DQoNCkJ1dCB0aGF0IGNvbnN0YW50IHdhcyBub3QgaW50cm9k dWNlZCBieSBtZSBpbiB0aGUgZG0gY29kZS4gU2VlIGUuZy4gdGhlDQpmb2xsb3dpbmcgY29tbWl0 czoNCg0KY29tbWl0IGQ1NDhiMzRiMDYyYjYwYjRmNGRmMjk1YTBiNDgyM2RmZGExZjFmYzQNCkF1 dGhvcjogTWlrZSBTbml0emVyIDxzbml0emVyQHJlZGhhdC5jb20+DQpEYXRlOiAgIFRodSBNYXIg NSAyMjoyMToxMCAyMDE1IC0wNTAwDQoNCiAgICBkbTogcmVkdWNlIHRoZSBxdWV1ZSBkZWxheSB1 c2VkIGluIGRtX3JlcXVlc3RfZm4gZnJvbSAxMDBtcyB0byAxMG1zDQogICAgIA0KICAgIENvbW1p dCA3ZWFjZWFjY2FiICgiYmxvY2s6IHJlbW92ZSBwZXItcXVldWUgcGx1Z2dpbmciKSBkaWRuJ3Qg anVzdGlmeQ0KICAgIERNJ3MgdXNlIG9mIGEgMTAwbXMgZGVsYXk7IHN1Y2ggYW4gZXh0ZW5kZWQg ZGVsYXkgaXMgYSBsaWFiaWxpdHkgd2hlbg0KICAgIHRoZXJlIGlzIHJlYXNvbiB0byByZS1raWNr IHRoZSBxdWV1ZS4NCiAgICAgDQogICAgU2lnbmVkLW9mZi1ieTogTWlrZSBTbml0emVyIDxzbml0 emVyQHJlZGhhdC5jb20+DQoNCmNvbW1pdCA3ZWFjZWFjY2FiNWY0MGJiZmRhMDQ0NjI5YTYyOTg2 MTZhZWFlZDUwDQpBdXRob3I6IEplbnMgQXhib2UgPGpheGJvZUBmdXNpb25pby5jb20+DQpEYXRl OiAgIFRodSBNYXIgMTAgMDg6NTI6MDcgMjAxMSArMDEwMA0KDQogICAgYmxvY2s6IHJlbW92ZSBw ZXItcXVldWUgcGx1Z2dpbmcNCiAgICAgDQogICAgQ29kZSBoYXMgYmVlbiBjb252ZXJ0ZWQgb3Zl ciB0byB0aGUgbmV3IGV4cGxpY2l0IG9uLXN0YWNrIHBsdWdnaW5nLA0KICAgIGFuZCBkZWxheSB1 c2VycyBoYXZlIGJlZW4gY29udmVydGVkIHRvIHVzZSB0aGUgbmV3IEFQSSBmb3IgdGhhdC4NCiAg ICBTbyBsZXRzIGtpbGwgb2ZmIHRoZSBvbGQgcGx1Z2dpbmcgYWxvbmcgd2l0aCBhb3BzLT5zeW5j X3BhZ2UoKS4NCiAgICAgDQogICAgU2lnbmVkLW9mZi1ieTogSmVucyBBeGJvZSA8amF4Ym9lQGZ1 c2lvbmlvLmNvbT4NCg0KQmFydC4g