From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0A6A5CA9EAE for ; Tue, 29 Oct 2019 17:27:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DCB3520830 for ; Tue, 29 Oct 2019 17:27:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727690AbfJ2R1q (ORCPT ); Tue, 29 Oct 2019 13:27:46 -0400 Received: from mga11.intel.com ([192.55.52.93]:43995 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726316AbfJ2R1p (ORCPT ); Tue, 29 Oct 2019 13:27:45 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Oct 2019 10:27:45 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,244,1569308400"; d="scan'208";a="399862741" Received: from orsmsx102.amr.corp.intel.com ([10.22.225.129]) by fmsmga005.fm.intel.com with ESMTP; 29 Oct 2019 10:27:44 -0700 Received: from orsmsx112.amr.corp.intel.com ([169.254.3.185]) by ORSMSX102.amr.corp.intel.com ([169.254.3.181]) with mapi id 14.03.0439.000; Tue, 29 Oct 2019 10:27:44 -0700 From: "Edgecombe, Rick P" To: "peterz@infradead.org" CC: "adobriyan@gmail.com" , "linux-kernel@vger.kernel.org" , "rppt@kernel.org" , "rostedt@goodmis.org" , "jejb@linux.ibm.com" , "tglx@linutronix.de" , "linux-mm@kvack.org" , "dave.hansen@linux.intel.com" , "linux-api@vger.kernel.org" , "x86@kernel.org" , "akpm@linux-foundation.org" , "hpa@zytor.com" , "mingo@redhat.com" , "luto@kernel.org" , "kirill@shutemov.name" , "bp@alien8.de" , "rppt@linux.ibm.com" , "arnd@arndb.de" Subject: Re: [PATCH RFC] mm: add MAP_EXCLUSIVE to create exclusive user mappings Thread-Topic: [PATCH RFC] mm: add MAP_EXCLUSIVE to create exclusive user mappings Thread-Index: AQHVjbnGcEUDTQSU2UGbl4rq5h7p8qdw7lIAgAARIwCAAVbQAA== Date: Tue, 29 Oct 2019 17:27:43 +0000 Message-ID: <69c57f7fa9a1be145827673b37beff155a3adc3c.camel@intel.com> References: <1572171452-7958-1-git-send-email-rppt@kernel.org> <1572171452-7958-2-git-send-email-rppt@kernel.org> <20191028123124.ogkk5ogjlamvwc2s@box> <20191028130018.GA7192@rapoport-lnx> <20191028131623.zwuwguhm4v4s5imh@box> <20191028135521.GB4097@hirez.programming.kicks-ass.net> <0a35765f7412937c1775daa05177b20113760aee.camel@intel.com> <20191028210052.GM4643@worktop.programming.kicks-ass.net> In-Reply-To: <20191028210052.GM4643@worktop.programming.kicks-ass.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.54.75.11] Content-Type: text/plain; charset="utf-8" Content-ID: <4DA018406618604E969C1F0F7211E856@intel.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org T24gTW9uLCAyMDE5LTEwLTI4IGF0IDIyOjAwICswMTAwLCBQZXRlciBaaWpsc3RyYSB3cm90ZToN Cj4gT24gTW9uLCBPY3QgMjgsIDIwMTkgYXQgMDc6NTk6MjVQTSArMDAwMCwgRWRnZWNvbWJlLCBS aWNrIFAgd3JvdGU6DQo+ID4gT24gTW9uLCAyMDE5LTEwLTI4IGF0IDE0OjU1ICswMTAwLCBQZXRl ciBaaWpsc3RyYSB3cm90ZToNCj4gPiA+IE9uIE1vbiwgT2N0IDI4LCAyMDE5IGF0IDA0OjE2OjIz UE0gKzAzMDAsIEtpcmlsbCBBLiBTaHV0ZW1vdiB3cm90ZToNCj4gPiA+IA0KPiA+ID4gPiBJIHRo aW5rIGFjdGl2ZSB1c2Ugb2YgdGhpcyBmZWF0dXJlIHdpbGwgbGVhZCB0byBwZXJmb3JtYW5jZSBk ZWdyYWRhdGlvbg0KPiA+ID4gPiBvZg0KPiA+ID4gPiB0aGUgc3lzdGVtIHdpdGggdGltZS4NCj4g PiA+ID4gDQo+ID4gPiA+IFNldHRpbmcgYSBzaW5nbGUgNGsgcGFnZSBub24tcHJlc2VudCBpbiB0 aGUgZGlyZWN0IG1hcHBpbmcgd2lsbCByZXF1aXJlDQo+ID4gPiA+IHNwbGl0dGluZyAyTSBvciAx RyBwYWdlIHdlIHVzdWFsbHkgbWFwIGRpcmVjdCBtYXBwaW5nIHdpdGguIEFuZCBpdCdzIG9uZQ0K PiA+ID4gPiB3YXkgcm9hZC4gV2UgZG9uJ3QgaGF2ZSBhbnkgbWVjaGFuaXNtIHRvIG1hcCB0aGUg bWVtb3J5IHdpdGggaHVnZSBwYWdlDQo+ID4gPiA+IGFnYWluIGFmdGVyIHRoZSBhcHBsaWNhdGlv biBoYXMgZnJlZWQgdGhlIHBhZ2UuDQo+ID4gPiANCj4gPiA+IFJpZ2h0LCB3ZSByZWNlbnRseSBo YWQgYSAnYnVnJyB3aGVyZSBmdHJhY2UgdHJpZ2dlcmVkIHNvbWV0aGluZyBsaWtlDQo+ID4gPiB0 aGlzIGFuZCBmYWNlYm9vayByYW4gaW50byBpdCBhcyBhIHBlcmZvcm1hbmNlIHJlZ3Jlc3Npb24u IFNvIHllcywgdGhpcw0KPiA+ID4gaXMgYSByZWFsIGNvbmNlcm4uDQo+ID4gDQo+ID4gRG9uJ3Qg ZS9jQlBGIGZpbHRlcnMgYWxzbyBicmVhayB0aGUgZGlyZWN0IG1hcCBkb3duIHRvIDRrIHBhZ2Vz IHdoZW4gY2FsbGluZw0KPiA+IHNldF9tZW1vcnlfcm8oKSBvbiB0aGUgZmlsdGVyIGZvciA2NCBi aXQgeDg2IGFuZCBhcm0/DQo+ID4gDQo+ID4gSSd2ZSBiZWVuIHdvbmRlcmluZyBpZiB0aGUgcGFn ZSBhbGxvY2F0b3Igc2hvdWxkIG1ha2Ugc29tZSBlZmZvcnQgdG8gZmluZCBhDQo+ID4gYnJva2Vu IGRvd24gcGFnZSBmb3IgYW55dGhpbmcgdGhhdCBjYW4gYmUga25vd24gd2lsbCBoYXZlIGRpcmVj dCBtYXANCj4gPiBwZXJtaXNzaW9ucw0KPiA+IGNoYW5nZWQgKG9yIGlmIGl0IGFscmVhZHkgZ3Jv dXBzIHRoZW0gc29tZWhvdykuIEJ1dCBhbHNvLCB3aHkgYW55IHBvdGVudGlhbA0KPiA+IHNsb3dk b3duIG9mIDRrIHBhZ2VzIG9uIHRoZSBkaXJlY3QgbWFwIGhhc24ndCBiZWVuIG5vdGljZWQgZm9y IGFwcHMgdGhhdCBkbw0KPiA+IGENCj4gPiBsb3Qgb2YgaW5zZXJ0aW9ucyBhbmQgcmVtb3ZhbHMg b2YgQlBGIGZpbHRlcnMsIGlmIHRoaXMgaXMgaW5kZWVkIHRoZSBjYXNlLg0KPiANCj4gVGhhdCBz aG91bGQgYmUgbGltaXRlZCB0byB0aGUgbW9kdWxlIHJhbmdlLiBSYW5kb20gZGF0YSBtYXBzIGNv dWxkDQo+IHNoYXR0ZXIgdGhlIHdvcmxkLg0KDQpCUEYgaGFzIG9uZSB2bWFsbG9jIHNwYWNlIGFs bG9jYXRpb24gZm9yIHRoZSBieXRlIGNvZGUgYW5kIG9uZSBmb3IgdGhlIG1vZHVsZQ0Kc3BhY2Ug YWxsb2NhdGlvbiBmb3IgdGhlIEpJVC4gQm90aCBnZXQgUk8gYWxzbyBzZXQgb24gdGhlIGRpcmVj dCBtYXAgYWxpYXMgb2YNCnRoZSBwYWdlcywgYW5kIHJlc2V0IFJXIHdoZW4gZnJlZWQuDQoNCllv dSBtZWFuIHNoYXR0ZXIgcGVyZm9ybWFuY2U/DQo=