Received: by 2002:a25:ca44:0:0:0:0:0 with SMTP id a65csp1233097ybg; Wed, 29 Jul 2020 08:58:24 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxA3zkW9VqhgqUUL7cllaD0zxefEUHw0ypMZ4n7HuuXa3vPSBsJr5en0JMYvps1JGTS7/4E X-Received: by 2002:a50:d697:: with SMTP id r23mr6816940edi.223.1596038304292; Wed, 29 Jul 2020 08:58:24 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1596038304; cv=none; d=google.com; s=arc-20160816; b=GFLgMxNWwlU3uOlZHm9LKjoer2o7lRgYz98X8+Bl+4pAhh1JRqJ5BhX7JwK0GxfGwE sgHKFQPG4N8MAjm0ZDt4+Cm0CnIH+w9gus4XCi+WWpVxebWG5pHat5fQF/okrIlh/CW9 GOvfhVmg09UBnAGl7fGGkzKT0zEUc2oS3KzseRcKu1VAt++g0EoAO6zlQvq4UgAYR6DZ FUJ+2MUfrN11iGrMbF2VmvNr+htagNQJ0wsyD1jw2rI0O2ui2VEEnBUFJusQBXSumUvr yc8pg/DnSu+spXUG1n+Lpw2pmQx2eyxt3nbKVjZH3GuGlU9sR9eWd9QntaWT0yIOK4qX ubyw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:content-disposition :mime-version:mail-followup-to:message-id:subject:cc:to:from:date; bh=me0c6dFIaXnl5KRmLvZo+21VlR/u/TmzNfjqI0Kknuk=; b=ujZjcMAFHhQAODQrgHnuEGuES8Tvgmz8S5+QpQeBpAh+ejQHy4xRJH9RUjLEA9+s5m Nzktr1me9jVpX9N71O0TFrzoOp/V5VtjXr4a21eTChLzmayGGEbMP86DdHhW8amiT0EJ SZ5XduqcdxwFXyxZwjPF9ejsswE1njcfcZSYSRZUVPR1C+2HIWkrxjmqiVcWxzpx/30c zR8624TOC4K0TOWywAlrjyLvCrNNF+uTAqhD0X8KOgw8ePA0uI5brBXg711emnwLT2z+ f98vuLrn7g5uR/O67p5jHQw0DXWP4WkyIu1wq8UfTUEfjPTNUEdCuZjkTccayTs/aLje aKlw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id v14si1465507ejx.388.2020.07.29.08.58.01; Wed, 29 Jul 2020 08:58:24 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726900AbgG2P4w (ORCPT + 99 others); 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,