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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 40161C432BE for ; Tue, 3 Aug 2021 18:00:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1766160EE9 for ; Tue, 3 Aug 2021 18:00:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238568AbhHCSAW (ORCPT ); Tue, 3 Aug 2021 14:00:22 -0400 Received: from mga18.intel.com ([134.134.136.126]:36888 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238536AbhHCSAU (ORCPT ); Tue, 3 Aug 2021 14:00:20 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10065"; a="200937981" X-IronPort-AV: E=Sophos;i="5.84,292,1620716400"; d="scan'208";a="200937981" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Aug 2021 11:00:08 -0700 X-IronPort-AV: E=Sophos;i="5.84,292,1620716400"; d="scan'208";a="419129393" Received: from akleen-mobl1.amr.corp.intel.com (HELO [10.209.96.93]) ([10.209.96.93]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Aug 2021 11:00:08 -0700 Subject: Re: [PATCH V2] perf/x86/intel: Apply mid ACK for small core To: "Liang, Kan" , Peter Zijlstra Cc: mingo@redhat.com, linux-kernel@vger.kernel.org, stable@vger.kernel.org References: <1627997128-57891-1-git-send-email-kan.liang@linux.intel.com> <9b0cb4ec-e8b8-3739-7b8d-e1c05785023a@linux.intel.com> <20f884f0-bf32-a8a0-1636-674d1b3a4715@linux.intel.com> From: Andi Kleen Message-ID: <7bc98060-f22a-27f8-1bbb-bceda58319a7@linux.intel.com> Date: Tue, 3 Aug 2021 11:00:07 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 MIME-Version: 1.0 In-Reply-To: <20f884f0-bf32-a8a0-1636-674d1b3a4715@linux.intel.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >> Any chance that would also work for the chips that now use late_ack? >> > > Let me check and do some tests. I suspect we won't be able to test all, so we'll probably have to keep all three options. -Andi