Re: [LSF/MM TOPIC] A high-performance userspace block driver
From: Bart Van Assche <hidden>
Date: 2018-01-17 00:41:46
Also in:
linux-fsdevel, linux-mm
T24gVHVlLCAyMDE4LTAxLTE2IGF0IDA2OjUyIC0wODAwLCBNYXR0aGV3IFdpbGNveCB3cm90ZToN Cj4gSSBzZWUgdGhlIGltcHJvdmVtZW50cyB0aGF0IEZhY2Vib29rIGhhdmUgYmVlbiBtYWtpbmcg dG8gdGhlIG5iZCBkcml2ZXIsDQo+IGFuZCBJIHRoaW5rIHRoYXQncyBhIHdvbmRlcmZ1bCB0aGlu Zy4gIE1heWJlIHRoZSBvdXRjb21lIG9mIHRoaXMgdG9waWMNCj4gaXMgc2ltcGx5OiAiU2h1dCB1 cCwgTWF0dGhldywgdGhpcyBpcyBnb29kIGVub3VnaCIuDQo+IA0KPiBJdCdzIGNsZWFyIHRoYXQg dGhlcmUncyBhbiBhcHBldGl0ZSBmb3IgdXNlcnNwYWNlIGJsb2NrIGRldmljZXM7IG5vdCBmb3IN Cj4gc3dhcCBkZXZpY2VzIG9yIHRoZSByb290IGRldmljZSwgYnV0IGZvciBhY2Nlc3NpbmcgZGF0 YSB0aGF0J3Mgc3RvcmVkDQo+IGluIHRoYXQgc2lsbyBvdmVyIHRoZXJlLCBhbmQgSSByZWFsbHkg ZG9uJ3Qgd2FudCB0byBicmluZyB0aGF0IGVudGlyZQ0KPiBtZXNzIG9mIENPUkJBIC8gR28gLyBS dXN0IC8gd2hhdGV2ZXIgaW50byB0aGUga2VybmVsIHRvIGdldCB0byBpdCwNCj4gYnV0IGl0IHdv dWxkIGJlIHJlYWxseSBoYW5keSB0byBwcmVzZW50IGl0IGFzIGEgYmxvY2sgZGV2aWNlLg0KPiAN Cj4gSSd2ZSBsb29rZWQgYXQgYSBmZXcgYmxvY2stZHJpdmVyLWluLXVzZXJzcGFjZSBwcm9qZWN0 cyB0aGF0IGV4aXN0LCBhbmQNCj4gdGhleSBhbGwgc2VlbSBwcmV0dHkgYmFkLiAgRm9yIGV4YW1w bGUsIG9uZSBBUEkgbWFwcyBhIGZldyBnaWdhYnl0ZXMgb2YNCj4gYWRkcmVzcyBzcGFjZSBhbmQg cGxheXMgZ2FtZXMgd2l0aCB2bV9pbnNlcnRfcGFnZSgpIHRvIHB1dCBwYWdlIGNhY2hlDQo+IHBh Z2VzIGludG8gdGhlIGFkZHJlc3Mgc3BhY2Ugb2YgdGhlIGNsaWVudCBwcm9jZXNzLiAgT2YgY291 cnNlLCB0aGUgVExCDQo+IGZsdXNoIG92ZXJoZWFkIG9mIHRoYXQgc29sdXRpb24gaXMgY3JpbWlu YWwuDQo+IA0KPiBJJ3ZlIGxvb2tlZCBhdCBwaXBlcywgYW5kIHRoZXkncmUgbm90IGFuIGF3ZnVs IHNvbHV0aW9uLiAgV2UndmUgYWxtb3N0DQo+IGdvdCBlbm91Z2ggc3lzY2FsbHMgdG8gdHJlYXQg b3RoZXIgb2JqZWN0cyBhcyBwaXBlcy4gIFRoZSBwcm9ibGVtIGlzDQo+IHRoYXQgdGhleSdyZSBu b3Qgc2Vla2FibGUuICBTbyBlc3NlbnRpYWxseSB5b3UncmUgbG9va2luZyBhdCBoYXZpbmcgb25l DQo+IHBpcGUgcGVyIG91dHN0YW5kaW5nIGNvbW1hbmQuICBJZiB5dSB3YW50IHRvIG1ha2UgZ29v ZCB1c2Ugb2YgYSBtb2Rlcm4NCj4gTkFORCBkZXZpY2UsIHlvdSB3YW50IGEgZmV3IGh1bmRyZWQg b3V0c3RhbmRpbmcgY29tbWFuZHMsIGFuZCB0aGF0J3MgYQ0KPiBiaXQgb2YgYSBzaG9kZHkgaW50 ZXJmYWNlLg0KPiANCj4gUmlnaHQgbm93LCBJJ20gbGVhbmluZyB0b3dhcmRzIGNvbWJpbmluZyB0 aGVzZSB0d28gYXBwcm9hY2hlczsgYWRkaW5nDQo+IGEgVk1fTk9UTEIgZmxhZyBzbyB0aGUgbW1h cGVkIGJpdHMgb2YgdGhlIHBhZ2UgY2FjaGUgbmV2ZXIgbWFrZSBpdCBpbnRvDQo+IHRoZSBwcm9j ZXNzJ3MgYWRkcmVzcyBzcGFjZSwgc28gdGhlIFRMQiBzaG9vdGRvd24gY2FuIGJlIHNhZmVseSBz a2lwcGVkLg0KPiBUaGVuIGNoZWNrIGl0IGluIGZvbGxvd19wYWdlX21hc2soKSBhbmQgcmV0dXJu IHRoZSBhcHByb3ByaWF0ZSBzdHJ1Y3QNCj4gcGFnZS4gIEFzIGxvbmcgYXMgdGhlIHVzZXJzcGFj ZSBwcm9jZXNzIGRvZXMgZXZlcnl0aGluZyB1c2luZyBPX0RJUkVDVCwNCj4gSSB0aGluayB0aGlz IHdpbGwgd29yay4NCj4gDQo+IEl0J3MgZWl0aGVyIHRoYXQgb3IgbWFrZSBwaXBlcyBzZWVrYWJs ZSAuLi4NCg0KSG93IGFib3V0IHVzaW5nIHRoZSBSRE1BIEFQSSBhbmQgdGhlIHJkbWFfcnhlIGRy aXZlciBvdmVyIGxvb3BiYWNrPyBUaGUgUkRNQQ0KQVBJIHN1cHBvcnRzIHplcm8tY29weSBjb21t dW5pY2F0aW9uIHdoaWNoIGlzIHNvbWV0aGluZyB0aGUgQlNEIHNvY2tldCBBUEkNCmRvZXMgbm90 IHN1cHBvcnQuIFRoZSBSRE1BIEFQSSBhbHNvIHN1cHBvcnRzIGJ5dGUtbGV2ZWwgZ3JhbnVsYXJp dHkgYW5kIHRoZQ0KaG90IHBhdGggKGliX3Bvc3Rfc2VuZCgpLCBpYl9wb3N0X3JlY3YoKSwgaWJf cG9sbF9jcSgpKSBkb2VzIG5vdCByZXF1aXJlIGFueQ0Kc3lzdGVtIGNhbGxzIGZvciBQQ0llIFJE TUEgYWRhcHRlcnMuIFRoZSByZG1hX3J4ZSBkcml2ZXIgaG93ZXZlciB1c2VzIGEgc3lzdGVtDQpj YWxsIHRvIHRyaWdnZXIgdGhlIHNlbmQgZG9vcmJlbGwuDQoNCkJhcnQuDQo=