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12 Oct 2022 08:59:56 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10498"; a="695522374" X-IronPort-AV: E=Sophos;i="5.95,179,1661842800"; d="scan'208";a="695522374" Received: from mpatter1-mobl.amr.corp.intel.com (HELO [10.209.53.34]) ([10.209.53.34]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Oct 2022 08:59:51 -0700 Message-ID: Date: Wed, 12 Oct 2022 08:59:51 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: [PATCH v2 01/39] Documentation/x86: Add CET description Content-Language: en-US To: Florian Weimer , "Edgecombe, Rick P" Cc: "bsingharora@gmail.com" , "hpa@zytor.com" , "Syromiatnikov, Eugene" , "peterz@infradead.org" , "rdunlap@infradead.org" , "keescook@chromium.org" , "Yu, Yu-cheng" , "dave.hansen@linux.intel.com" , "kirill.shutemov@linux.intel.com" , "Eranian, Stephane" , "linux-mm@kvack.org" , "nadav.amit@gmail.com" , "jannh@google.com" , "dethoma@microsoft.com" , "linux-arch@vger.kernel.org" , "kcc@google.com" , "bp@alien8.de" , "oleg@redhat.com" , "hjl.tools@gmail.com" , "Yang, Weijiang" , "Lutomirski, Andy" , "pavel@ucw.cz" , "arnd@arndb.de" , "Moreira, Joao" , "tglx@linutronix.de" , "mike.kravetz@oracle.com" , "x86@kernel.org" , "linux-doc@vger.kernel.org" , "jamorris@linux.microsoft.com" , "john.allen@amd.com" , "rppt@kernel.org" , "mingo@redhat.com" , "Shankar, Ravi V" , "corbet@lwn.net" , "linux-kernel@vger.kernel.org" , "linux-api@vger.kernel.org" , "gorcunov@gmail.com" References: <20220929222936.14584-1-rick.p.edgecombe@intel.com> <20220929222936.14584-2-rick.p.edgecombe@intel.com> <87ilkr27nv.fsf@oldenburg.str.redhat.com> <62481017bc02b35587dd520ed446a011641aa390.camel@intel.com> <87v8opz0me.fsf@oldenburg.str.redhat.com> From: Dave Hansen In-Reply-To: <87v8opz0me.fsf@oldenburg.str.redhat.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=none ("invalid DKIM record") header.d=intel.com header.s=Intel header.b=mgbnPbGY; spf=pass (imf14.hostedemail.com: domain of dave.hansen@intel.com designates 134.134.136.31 as permitted sender) smtp.mailfrom=dave.hansen@intel.com; dmarc=pass (policy=none) header.from=intel.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1665590399; a=rsa-sha256; cv=none; b=1XQzBIEWeX4ImbMpkvQcNq+G1KQStNniHjAYwgbbGX2Wf5jAqsgajd+HHIpqQkvHKHX2bj KymML5iGUDYlWv3CFRm5/Gs+UcQKppn98EFJS1KW8lAFAboEJcAWmu4cuBowY+Yip7B4u9 LZaiB+6nNBw7Aapuz2NL/gtck5ty61Q= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1665590399; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=5jrOsLcwWC5cOzyLRPss+/TAMiA6DH9FlS79v9hY5+Q=; b=v8+9iXqn3SETjPY9JsqN2+2m1aEVpELV26ULgJNQBSdQcLiQccG59904NPwRnoQ56nbhgh mkqzxOiA80CEx3dDANLepEPJJe6oxu+yjsJ0qNKt1knNZwax5MvZuS/5RSvCFMJWVHfSeX wYi11Hxl5atHVyOIgNpaasP+aOCvaWM= X-Rspamd-Server: rspam05 X-Rspam-User: Authentication-Results: imf14.hostedemail.com; dkim=none ("invalid DKIM record") header.d=intel.com header.s=Intel header.b=mgbnPbGY; spf=pass (imf14.hostedemail.com: domain of dave.hansen@intel.com designates 134.134.136.31 as permitted sender) smtp.mailfrom=dave.hansen@intel.com; dmarc=pass (policy=none) header.from=intel.com X-Stat-Signature: 1ctk8aakcpdcbwqnocj44c5tfp511d8q X-Rspamd-Queue-Id: 5579C10001A X-HE-Tag: 1665590399-632734 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 10/12/22 05:29, Florian Weimer wrote: >> What did you think of the proposal to disable existing binaries and >> start from scratch? Elaborated in the coverletter in the section >> "Compatibility of Existing Binaries/Enabling Interface". > The ABI was finalized around four years ago, and we have shipped several > Fedora and Red Hat Enterprise Linux versions with it. Other > distributions did as well. It's a bit late to make changes now, and > certainly not for such trivialities. Just to be clear: You're saying that a user/kernel ABI was "finalized" by glibc shipping the user side of it, before there being an upstream kernel implementation?