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Fri, 03 Jun 2022 10:12:55 -0700 (PDT) Message-ID: <22004457-a6a8-1e9e-4220-ae15339ec94b@gmail.com> Date: Fri, 3 Jun 2022 19:12:53 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.0 Subject: Re: [PATCH 2/2] userfaultfd.2: Update on write-protection support Content-Language: en-US To: Peter Xu , linux-kernel@vger.kernel.org, linux-man@vger.kernel.org, linux-mm@kvack.org Cc: Axel Rasmussen , Andrea Arcangeli , Nadav Amit , Andrew Morton References: <20220531011157.46868-1-peterx@redhat.com> <20220531011157.46868-3-peterx@redhat.com> From: Alejandro Colomar In-Reply-To: <20220531011157.46868-3-peterx@redhat.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------fBOETOUw4GKqOh24LOYpoYQ1" X-Spam-Status: No, score=-2.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, RDNS_NONE,SPF_HELO_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------------fBOETOUw4GKqOh24LOYpoYQ1 Content-Type: multipart/mixed; boundary="------------ItUDOLrw1UTMRnHSSHbj2rGi"; protected-headers="v1" From: Alejandro Colomar To: Peter Xu , linux-kernel@vger.kernel.org, linux-man@vger.kernel.org, linux-mm@kvack.org Cc: Axel Rasmussen , Andrea Arcangeli , Nadav Amit , Andrew Morton Message-ID: <22004457-a6a8-1e9e-4220-ae15339ec94b@gmail.com> Subject: Re: [PATCH 2/2] userfaultfd.2: Update on write-protection support References: <20220531011157.46868-1-peterx@redhat.com> <20220531011157.46868-3-peterx@redhat.com> In-Reply-To: <20220531011157.46868-3-peterx@redhat.com> --------------ItUDOLrw1UTMRnHSSHbj2rGi Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64 SGkgUGV0ZXIsDQoNCk9uIDUvMzEvMjIgMDM6MTEsIFBldGVyIFh1IHdyb3RlOg0KPiBUaGUg c2htZW0vaHVnZXRsYmZzIG1lbW9yeSB0eXBlcyBhcmUgc3VwcG9ydGVkIGZvciB3cml0ZS1w cm90ZWN0aW9uDQo+IG1lc3NhZ2VzIHZlcnkgbGF0ZWx5LiAgVXBkYXRlIHRoZSBtYW4gcGFn ZSB0byByZWZsZWN0IHRoYXQuDQo+IA0KPiBTaWduZWQtb2ZmLWJ5OiBQZXRlciBYdSA8cGV0 ZXJ4QHJlZGhhdC5jb20+DQoNClBsZWFzZSBzZWUgc29tZSBzb3VyY2UgZm9ybWF0dGluZyBj b21tZW50cyBiZWxvdy4NCg0KQ2hlZXJzLA0KDQpBbGV4DQoNCj4gLS0tDQo+ICAgbWFuMi91 c2VyZmF1bHRmZC4yIHwgOCArKysrKy0tLQ0KPiAgIDEgZmlsZSBjaGFuZ2VkLCA1IGluc2Vy dGlvbnMoKyksIDMgZGVsZXRpb25zKC0pDQo+IA0KPiBkaWZmIC0tZ2l0IGEvbWFuMi91c2Vy ZmF1bHRmZC4yIGIvbWFuMi91c2VyZmF1bHRmZC4yDQo+IGluZGV4IDA5MjhhNzZkMi4uOTlh YWU4YjUwIDEwMDY0NA0KPiAtLS0gYS9tYW4yL3VzZXJmYXVsdGZkLjINCj4gKysrIGIvbWFu Mi91c2VyZmF1bHRmZC4yDQo+IEBAIC0yNzMsMTMgKzI3MywxNyBAQCBTaW5jZSBMaW51eCA0 LjExLA0KPiAgIHVzZXJmYXVsdGZkIGNhbiBiZSBhbHNvIHVzZWQgd2l0aCBodWdldGxiZnMg YW5kIHNoYXJlZCBtZW1vcnkgbWFwcGluZ3MuDQo+ICAgLlwiDQo+ICAgLlNTIFVzZXJmYXVs dGZkIHdyaXRlLXByb3RlY3QgbW9kZSAoc2luY2UgNS43KQ0KPiAtU2luY2UgTGludXggNS43 LCB1c2VyZmF1bHRmZCBzdXBwb3J0cyB3cml0ZS1wcm90ZWN0IG1vZGUuDQo+ICtTaW5jZSBM aW51eCA1LjcsIHVzZXJmYXVsdGZkIHN1cHBvcnRzIHdyaXRlLXByb3RlY3QgbW9kZSBmb3Ig YW5vbnltb3VzIG1lbW9yeS4NCj4gICBUaGUgdXNlciBuZWVkcyB0byBmaXJzdCBjaGVjayBh dmFpbGFiaWxpdHkgb2YgdGhpcyBmZWF0dXJlIHVzaW5nDQo+ICAgLkIgVUZGRElPX0FQSQ0K PiAgIGlvY3RsIGFnYWluc3QgdGhlIGZlYXR1cmUgYml0DQo+ICAgLkIgVUZGRF9GRUFUVVJF X1BBR0VGQVVMVF9GTEFHX1dQDQo+ICAgYmVmb3JlIHVzaW5nIHRoaXMgZmVhdHVyZS4NCj4g ICAuUFANCj4gK1NpbmNlIExpbnV4IDUuMTksIHRoZSB3cml0ZS1wcm90ZWN0aW9uIG1vZGUg d2FzIGFsc28gc3VwcG9ydGVkIG9uIHNobWVtIGFuZCBodWdldGxiZnMNCj4gK21lbW9yeSB0 eXBlcy4gSXQgY2FuIGJlIGRldGVjdGVkIHdpdGggdGhlIGZlYXR1cmUgYml0DQoNClNlZSBt YW4tcGFnZXMoNyk6DQoNClsNCiAgICBVc2Ugc2VtYW50aWMgbmV3bGluZXMNCiAgICAgICAg SW4gdGhlIHNvdXJjZSBvZiBhIG1hbnVhbCBwYWdlLCBuZXcgc2VudGVuY2VzICBzaG91bGQg IGJlDQogICAgICAgIHN0YXJ0ZWQgIG9uIG5ldyBsaW5lcywgYW5kIGxvbmcgc2VudGVuY2Vz IHNob3VsZCBiZSBzcGxpdA0KICAgICAgICBpbnRvIGxpbmVzIGF0IGNsYXVzZSBicmVha3Mg KGNvbW1hcywgc2VtaWNvbG9ucywgIGNvbG9ucywNCiAgICAgICAgYW5kICBzbyBvbikuICBU aGlzIGNvbnZlbnRpb24sIHNvbWV0aW1lcyBrbm93biBhcyAic2VtYW7igJANCiAgICAgICAg dGljIG5ld2xpbmVzIiwgbWFrZXMgaXQgIGVhc2llciAgdG8gIHNlZSAgdGhlICBlZmZlY3Qg IG9mDQogICAgICAgIHBhdGNoZXMsICB3aGljaCAgb2Z0ZW4gb3BlcmF0ZSBhdCB0aGUgbGV2 ZWwgb2YgaW5kaXZpZHVhbA0KICAgICAgICBzZW50ZW5jZXMgb3Igc2VudGVuY2UgY2xhdXNl cy4NCl0NCg0KPiArLkJSIFVGRkRfRkVBVFVSRV9XUF9IVUdFVExCRlNfU0hNRU0gLg0KPiAr LlBQDQo+ICAgVG8gcmVnaXN0ZXIgd2l0aCB1c2VyZmF1bHRmZCB3cml0ZS1wcm90ZWN0IG1v ZGUsIHRoZSB1c2VyIG5lZWRzIHRvIGluaXRpYXRlIHRoZQ0KPiAgIC5CIFVGRkRJT19SRUdJ U1RFUg0KPiAgIGlvY3RsIHdpdGggbW9kZQ0KPiBAQCAtMzMwLDggKzMzNCw2IEBAIGlvY3Rs LCB3aG9zZQ0KPiAgIHNob3VsZCBoYXZlIHRoZSBmbGFnDQo+ICAgLkIgVUZGRElPX1dSSVRF UFJPVEVDVF9NT0RFX1dQDQo+ICAgY2xlYXJlZCB1cG9uIHRoZSBmYXVsdGVkIHBhZ2Ugb3Ig cmFuZ2UuDQo+IC0uUFANCj4gLVdyaXRlLXByb3RlY3QgbW9kZSBzdXBwb3J0cyBvbmx5IHBy aXZhdGUgYW5vbnltb3VzIG1lbW9yeS4NCj4gICAuU1MgUmVhZGluZyBmcm9tIHRoZSB1c2Vy ZmF1bHRmZCBzdHJ1Y3R1cmUNCj4gICBFYWNoDQo+ICAgLkJSIHJlYWQgKDIpDQoNCi0tIA0K QWxlamFuZHJvIENvbG9tYXINCjxodHRwOi8vd3d3LmFsZWphbmRyby1jb2xvbWFyLmVzLz4N Cg== --------------ItUDOLrw1UTMRnHSSHbj2rGi-- --------------fBOETOUw4GKqOh24LOYpoYQ1 Content-Type: application/pgp-signature; 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