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=-6.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 24463C4743C for ; Wed, 23 Jun 2021 15:07:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 022866115A for ; Wed, 23 Jun 2021 15:07:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230061AbhFWPJr (ORCPT ); Wed, 23 Jun 2021 11:09:47 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:57903 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229523AbhFWPJr (ORCPT ); Wed, 23 Jun 2021 11:09:47 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1624460849; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=yHCiJj43tDNkuVMQugA1B24KSUzuIyfm9V4T1jsq3/Y=; b=WBluvY2XAa/eBvaWwvtgJWahnLAxirfiiMHipLY9q8fMFoHKxT6wHyTXLAJznrTRHkcXVx fE3FKshmOebkwT3XrJw8rcO+xvXdMefrIJnfs4KS1AZjYhc+uuJrMVcwLLNzZ4JglwOWFK BznEG9nOfcrTKmlookYQ3/bpXb3ewKQ= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-85-bLa3K0S1MjK3aW0KWqe4Wg-1; Wed, 23 Jun 2021 11:07:27 -0400 X-MC-Unique: bLa3K0S1MjK3aW0KWqe4Wg-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 66E0BBD42A; Wed, 23 Jun 2021 15:06:43 +0000 (UTC) Received: from oldenburg.str.redhat.com (ovpn-112-211.ams2.redhat.com [10.36.112.211]) by smtp.corp.redhat.com (Postfix) with ESMTPS id BEB785C1A1; Wed, 23 Jun 2021 15:06:38 +0000 (UTC) From: Florian Weimer To: Peter Zijlstra Cc: Dave Hansen via Libc-alpha , Len Brown , Dave Hansen , Rich Felker , Linux API , "Bae, Chang Seok" , X86 ML , LKML , Kyle Huey , Borislav Petkov , Andy Lutomirski , Thomas Gleixner , Keno Fischer , Arjan van de Ven , Willy Tarreau Subject: Re: Candidate Linux ABI for Intel AMX and hypothetical new related features References: <874kf11yoz.ffs@nanos.tec.linutronix.de> <87k0ntazyn.ffs@nanos.tec.linutronix.de> <37833625-3e6b-5d93-cc4d-26164d06a0c6@intel.com> <9c8138eb-3956-e897-ed4e-426bf6663c11@intel.com> <87pmxk87th.fsf@oldenburg.str.redhat.com> Date: Wed, 23 Jun 2021 17:06:35 +0200 In-Reply-To: (Peter Zijlstra's message of "Fri, 21 May 2021 16:49:22 +0200") Message-ID: <87wnqkzklg.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Precedence: bulk List-ID: X-Mailing-List: linux-api@vger.kernel.org * Peter Zijlstra: > On Fri, May 21, 2021 at 04:44:58PM +0200, Florian Weimer wrote: > >> And we added an interface for querying x86 CPU features to glibc 2.33 >> which is completely incompatible with this because it assumes that CPU >> features do not change during the lifetime of a process. 8-( > > How many x86 kernel maintainers signed off on that patch? I've started a new thread: x86 CPU features detection for applications (and AMX) Thanks, Florian