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=-5.5 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 BBE0EC433E0 for ; Wed, 29 Jul 2020 15:56:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A25DE206D4 for ; Wed, 29 Jul 2020 15:56:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726920AbgG2P4w (ORCPT ); Wed, 29 Jul 2020 11:56:52 -0400 Received: from vmicros1.altlinux.org ([194.107.17.57]:40614 "EHLO vmicros1.altlinux.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726365AbgG2P4w (ORCPT ); Wed, 29 Jul 2020 11:56:52 -0400 Received: from imap.altlinux.org (imap.altlinux.org [194.107.17.38]) by vmicros1.altlinux.org (Postfix) with ESMTP id B267972CCDC; Wed, 29 Jul 2020 18:56:49 +0300 (MSK) Received: from altlinux.org (sole.flsd.net [185.75.180.6]) by imap.altlinux.org (Postfix) with ESMTPSA id 7EABE4A5036; Wed, 29 Jul 2020 18:56:47 +0300 (MSK) Date: Wed, 29 Jul 2020 18:56:47 +0300 From: Vitaly Chikunov To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo Cc: linux-kernel@vger.kernel.org, Vitaly Chikunov , "Dmitry V. Levin" Subject: Should perf version match kernel version? Message-ID: <20200729155647.xte33krus3mak3wu@altlinux.org> Mail-Followup-To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , linux-kernel@vger.kernel.org, "Dmitry V. Levin" MIME-Version: 1.0 Content-Type: text/plain; charset=koi8-r Content-Disposition: inline User-Agent: NeoMutt/20171215-106-ac61c7 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, It seems that most distros try to have perf version to match with running kernel version. Is is requirement? Would it be better to have single perf from kernel mainline to work with any (older) kernel version? We have different kernel versions in ALT Linux (stable for 4.19, 5.4, and 5.7) and I want to understand if we should have three perfs or single package will be enough. Thanks,