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=ham 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 C5460C43613 for ; Sun, 23 Jun 2019 11:32:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9A7C2205F4 for ; Sun, 23 Jun 2019 11:32:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726605AbfFWLce (ORCPT ); Sun, 23 Jun 2019 07:32:34 -0400 Received: from vmicros1.altlinux.org ([194.107.17.57]:44088 "EHLO vmicros1.altlinux.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726350AbfFWLce (ORCPT ); Sun, 23 Jun 2019 07:32:34 -0400 Received: from mua.local.altlinux.org (mua.local.altlinux.org [192.168.1.14]) by vmicros1.altlinux.org (Postfix) with ESMTP id E597372CC6C; Sun, 23 Jun 2019 14:32:30 +0300 (MSK) Received: by mua.local.altlinux.org (Postfix, from userid 508) id BD7567CCE2E; Sun, 23 Jun 2019 14:32:30 +0300 (MSK) Date: Sun, 23 Jun 2019 14:32:30 +0300 From: "Dmitry V. Levin" To: Christian Brauner Cc: Jann Horn , Oleg Nesterov , Arnd Bergmann , linux-api@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] samples: make pidfd-metadata fail gracefully on older kernels Message-ID: <20190623113230.GC20697@altlinux.org> References: <20190620103105.cdxgqfelzlnkmblv@brauner.io> <20190620110037.GA4998@altlinux.org> <20190620111036.asi3mbcv4ax5ekrw@brauner.io> <20190621170613.GA26182@altlinux.org> <20190621221339.6yj4vg4zexv4y2j7@brauner.io> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="SLDf9lqlvOQaIe6s" Content-Disposition: inline In-Reply-To: <20190621221339.6yj4vg4zexv4y2j7@brauner.io> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --SLDf9lqlvOQaIe6s Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Jun 22, 2019 at 12:13:39AM +0200, Christian Brauner wrote: [...] > Out of curiosity: what makes the new flag different than say > CLONE_NEWCGROUP or any new clone flag that got introduced? > CLONE_NEWCGROUP too would not be detectable apart from the method I gave > you above; same for other clone flags. Why are you so keen on being able > to detect this flag when other flags didn't seem to matter that much. I wasn't following uapi changes closely enough those days. ;) --=20 ldv --SLDf9lqlvOQaIe6s Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIcBAEBCAAGBQJdD2NOAAoJEAVFT+BVnCUIynwQANQg2+3d1f3l3bLNZVQ5QcSi TXyKC5vKPf+zMj/1U2worLzq75AC6r+cfM7dVZoTb6zVCqN3CiQMQUuVXJHItA3N uwFq3KM4DLR0ofIyRoyYq9MnWDpBUWNt0xdUZxLYPYMiRfaueAaqDfvFOAhexDcX PouLJj3ixzVP5JXmzxzZer//oj+gyy+8Of2Z5QTg7K4mJMyrthS/3/qg9q7Ys1jR N9LysvxIVUn8UgmtWxIk1vKcwiVjCNmrqM63NWfhm6gX8YhaDzP+k9AwdYBO3MIV U58OZwWsQ4lrsnKEjQd74ACZPyuZk1ics50oK9bfFwk9HJBVgIp1WfEP2z1//VZM auZtI5SYix3svGX2MIV8l16nKj/FP3IY+IfyYwSxlermffcM9olR+hRNoEdYAxEt SBC7mSfozIeNLqokGNXr81SMx2w+QT0GawDdk2P8WB9ZJNAARDgLxOUw69Eu7p7q 0lBb0bPqUrCrp6XPJ3zVDpi6W+DbVBd7748iTxlorSKepFfVbWIsKLE591pfmOe/ m+tWajRVbMHQ080kualKehGgFLyahPpCzqUEmyThibInTlxShvZ50iFoNWRUxiID 6BF7OzGRoVG6Y4qSS4EalX1Mzo7xwh6+dcQPLxshSU0J32FG2alLxyQKOEChzAQ9 YQ8V+SuiitfJh3VPHBE6 =Eosu -----END PGP SIGNATURE----- --SLDf9lqlvOQaIe6s--