From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752691AbdGLNst (ORCPT ); Wed, 12 Jul 2017 09:48:49 -0400 Received: from mail.skyhub.de ([5.9.137.197]:59816 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751036AbdGLNss (ORCPT ); Wed, 12 Jul 2017 09:48:48 -0400 Date: Wed, 12 Jul 2017 15:48:44 +0200 From: Borislav Petkov To: Mikulas Patocka Cc: linux-tip-commits@vger.kernel.org, brgerst@gmail.com, dvlasenk@redhat.com, peterz@infradead.org, mpatocka@redhat.com, hpa@zytor.com, tglx@linutronix.de, linux-kernel@vger.kernel.org, luto@kernel.org, jpoimboe@redhat.com, torvalds@linux-foundation.org, mingo@kernel.org Subject: Re: [tip:x86/urgent] x86/cpu: Use indirect call to measure performance in init_amd_k6() Message-ID: <20170712134844.GA20580@nazgul.tnic> References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.6.0 (2016-04-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 12, 2017 at 06:09:57AM -0700, tip-bot for Mikulas Patocka wrote: > Commit-ID: 429ed86b5c99b388543f6f7f6983b1230326f2bb > Gitweb: http://git.kernel.org/tip/429ed86b5c99b388543f6f7f6983b1230326f2bb > Author: Mikulas Patocka > AuthorDate: Tue, 11 Jul 2017 07:44:05 -0400 > Committer: Ingo Molnar > CommitDate: Wed, 12 Jul 2017 10:42:32 +0200 > > x86/cpu: Use indirect call to measure performance in init_amd_k6() > > This old piece of code is supposed to measure the performance of indirect > calls to determine if the processor is buggy or not, however the compiler > optimizer turns it into a direct call. Are you booting on a real K6 or qemu? -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply. --