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=-5.8 required=3.0 tests=BAYES_00,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 C2F8BC4707A for ; Fri, 21 May 2021 14:49:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A9EB60720 for ; Fri, 21 May 2021 14:49:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233403AbhEUOvM (ORCPT ); Fri, 21 May 2021 10:51:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46386 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232057AbhEUOvM (ORCPT ); Fri, 21 May 2021 10:51:12 -0400 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 66B70C061574; Fri, 21 May 2021 07:49:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=ALbn5lDFGLmOae7t1+VXfI4tB9A+uk2BFLNOfo90rDI=; b=MiZuaH47ebEV3px0iHZfjsGtUf fIa/bT8qo86+Xj/otzNB0/fs5q7hAb6rTtqxfDmq6/F33H0hGJZ2j3usmoNfnnLzRGhu03FRYOwuQ gR43d+PdjVqSRd9RgEb83MnvBtxMJrbbmGh1qlFsABzu97ilJaT/zXLcr2VUmn7MaacykgrNkYqvF UQNvLKqV/PY10mXk6dbXBsM9e9bWBGiHrhjNK3TUyJ6NTWpXEXA9GCapn7+tWQcEWdNBMy1M142Mw ekBF+739VztnZU5vUMgMknt3CxcDhWbmM5NSDwdnKu9IBWXMXhl9pdYEqRiogc/QZFGl8pszLgPcZ IyqRTeYg==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1lk6Sp-005pTi-NA; Fri, 21 May 2021 14:49:23 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 9F0CE300264; Fri, 21 May 2021 16:49:22 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 6F28F30D9D883; Fri, 21 May 2021 16:49:22 +0200 (CEST) Date: Fri, 21 May 2021 16:49:22 +0200 From: Peter Zijlstra To: Florian Weimer 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 Message-ID: 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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87pmxk87th.fsf@oldenburg.str.redhat.com> Precedence: bulk List-ID: X-Mailing-List: linux-api@vger.kernel.org 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?