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=unavailable 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 190C9C31E4B for ; Fri, 14 Jun 2019 13:58:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E9D7821744 for ; Fri, 14 Jun 2019 13:58:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728692AbfFNN6Z (ORCPT ); Fri, 14 Jun 2019 09:58:25 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:35754 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728298AbfFNN6Z (ORCPT ); Fri, 14 Jun 2019 09:58:25 -0400 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-222-0dLfJHaUN2mjadwXspBVlg-1; Fri, 14 Jun 2019 14:58:22 +0100 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b::d117) by AcuMS.aculab.com (fd9f:af1c:a25b::d117) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Fri, 14 Jun 2019 14:58:21 +0100 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Fri, 14 Jun 2019 14:58:21 +0100 From: David Laight To: 'Josh Poimboeuf' CC: 'Alexei Starovoitov' , "x86@kernel.org" , "linux-kernel@vger.kernel.org" , Alexei Starovoitov , "Daniel Borkmann" , "netdev@vger.kernel.org" , "bpf@vger.kernel.org" , "Peter Zijlstra" , Song Liu , "Kairui Song" Subject: RE: [PATCH 6/9] x86/bpf: Fix JIT frame pointer usage Thread-Topic: [PATCH 6/9] x86/bpf: Fix JIT frame pointer usage Thread-Index: AQHVIjMat8Fq1dO6sUKm4aXwvliIEKaa+NdggAAgcYCAABJOQA== Date: Fri, 14 Jun 2019 13:58:21 +0000 Message-ID: <9b8aa912df694d25b581786100d3e2e2@AcuMS.aculab.com> References: <03ddea21a533b7b0e471c1d73ebff19dacdcf7e3.1560431531.git.jpoimboe@redhat.com> <20190613215807.wjcop6eaadirz5xm@ast-mbp.dhcp.thefacebook.com> <57f6e69da6b3461a9c39d71aa1b58662@AcuMS.aculab.com> <20190614134401.q2wbh6mvo4nzmw2o@treble> In-Reply-To: <20190614134401.q2wbh6mvo4nzmw2o@treble> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 X-MC-Unique: 0dLfJHaUN2mjadwXspBVlg-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org RnJvbTogSm9zaCBQb2ltYm9ldWYNCj4gU2VudDogMTQgSnVuZSAyMDE5IDE0OjQ0DQo+IA0KPiBP biBGcmksIEp1biAxNCwgMjAxOSBhdCAxMDo1MDoyM0FNICswMDAwLCBEYXZpZCBMYWlnaHQgd3Jv dGU6DQo+ID4gT24gVGh1LCBKdW4gMTMsIDIwMTkgYXQgMDg6MjE6MDNBTSAtMDUwMCwgSm9zaCBQ b2ltYm9ldWYgd3JvdGU6DQo+ID4gPiBUaGUgQlBGIEpJVCBjb2RlIGNsb2JiZXJzIFJCUC4gIFRo aXMgYnJlYWtzIGZyYW1lIHBvaW50ZXIgY29udmVudGlvbiBhbmQNCj4gPiA+IHRodXMgcHJldmVu dHMgdGhlIEZQIHVud2luZGVyIGZyb20gdW53aW5kaW5nIHRocm91Z2ggSklUIGdlbmVyYXRlZCBj b2RlLg0KPiA+ID4NCj4gPiA+IFJCUCBpcyBjdXJyZW50bHkgdXNlZCBhcyB0aGUgQlBGIHN0YWNr IGZyYW1lIHBvaW50ZXIgcmVnaXN0ZXIuICBUaGUNCj4gPiA+IGFjdHVhbCByZWdpc3RlciB1c2Vk IGlzIG9wYXF1ZSB0byB0aGUgdXNlciwgYXMgbG9uZyBhcyBpdCdzIGENCj4gPiA+IGNhbGxlZS1z YXZlZCByZWdpc3Rlci4gIENoYW5nZSBpdCB0byB1c2UgUjEyIGluc3RlYWQuDQo+ID4NCj4gPiBD b3VsZCB5b3UgbWFpbnRhaW4gdGhlIHN5c3RlbSAlcmJwIGNoYWluIHRocm91Z2ggdGhlIEJQRiBz dGFjaz8NCj4gDQo+IERvIHlvdSBtZWFuIHRvIHNhdmUgUkJQIGFnYWluIGJlZm9yZSBjaGFuZ2lu ZyBpdCBhZ2Fpbiwgc28gdGhhdCB3ZQ0KPiBjcmVhdGUgYW5vdGhlciBzdGFjayBmcmFtZSBpbnNp ZGUgdGhlIEJQRiBzdGFjaz8gIFRoYXQgbWlnaHQgd29yay4NCg0KVGhlIHVud2luZGVyIHdpbGwg KElJUkMpIGV4cGVjdCAqJXJicCB0byBiZSB0aGUgcHJldmlvdXMgJXJicCB2YWx1ZS4NCklmIHlv dSBtYWludGFpbiB0aGF0IGl0IHdpbGwgcHJvYmFibHkgYWxsIHdvcmsuDQoNCj4gPiBJdCBtaWdo dCBldmVuIGJlIHBvc3NpYmxlIHRvIHB1dCBzb21ldGhpbmcgcmVsZXZhbnQgaW4gdGhlICVyaXAN Cj4gPiBsb2NhdGlvbi4NCj4gDQo+IEknbSBub3Qgc3VyZSB3aGF0IHlvdSBtZWFuIGhlcmUuDQoN ClRoZSByZXR1cm4gYWRkcmVzcyBpcyAoYWdhaW4gSUlSQykgJXJicFstOF0gc28gdGhlIHVud2lu ZGVyIHdpbGwNCmV4cGVjdCB0aGF0IGFkZHJlc3MgdG8gYmUgYSBzeW1ib2wuDQoNCkkgZG8gcmVt ZW1iZXIgYSBzdGFjayB0cmFjZSBwcmludGVyIGZvciB4ODYgdGhpcyBkaWRuJ3QgbmVlZA0KYW55 IGFubm90YXRpb24gb2YgdGhlIG9iamVjdCBjb2RlIGFuZCBkaWRuJ3QgbmVlZCBmcmFtZSBwb2lu dGVycy4NClRoZSBvbmx5IGRvd25zaWRlIHdhcyB0aGF0IGl0IGhhZCB0byAnZ3Vlc3MnIChpZSBz Y2FuIHRoZSBzdGFjaykNCnRvIGdldCBvdXQgb2YgZnVuY3Rpb25zIHRoYXQgY291bGRuJ3QgcmV0 dXJuLg0KQmFzaWNhbGx5IGl0IGZvbGxvd2VkIHRoZSBjb250cm9sIGZsb3cgZm9yd2FyZHMgdHJh Y2tpbmcgdGhlDQp2YWx1ZXMgb2YgJXNwIGFuZCAlYnAgdW50aWwgaXQgZm91bmQgYSByZXR1cm4g aW5zdHVjdGlvbi4NCkFsbCBpdCBoYXMgdG8gZG8gaXMgZGV0ZWN0IGxvb3BzIGFuZCByZXRyeSBm cm9tIHRoZSBvdGhlcg0KdGFyZ2V0IG9mIGNvbmRpdGlvbmFsIGJyYW5jaGVzLg0KDQoJRGF2aWQN Cg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZh cm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYg KFdhbGVzKQ0K