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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 36DEBC43387 for ; Sun, 6 Jan 2019 16:55:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 06ABD206B6 for ; Sun, 6 Jan 2019 16:55:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726094AbfAFQzp (ORCPT ); Sun, 6 Jan 2019 11:55:45 -0500 Received: from shards.monkeyblade.net ([23.128.96.9]:43110 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726012AbfAFQzo (ORCPT ); Sun, 6 Jan 2019 11:55:44 -0500 Received: from localhost (unknown [198.134.98.50]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id 0EEBC14BF79E0; Sun, 6 Jan 2019 08:55:44 -0800 (PST) Date: Sun, 06 Jan 2019 08:55:35 -0800 (PST) Message-Id: <20190106.085535.1209544587823450673.davem@davemloft.net> To: ap420073@gmail.com Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, daniel@iogearbox.net, ast@kernel.org, mcgrof@kernel.org Subject: Re: [PATCH net 1/4] umh: add exit routine for UMH process From: David Miller In-Reply-To: References: <20181230163143.21030-1-ap420073@gmail.com> <20190105.141021.1299321405902891635.davem@davemloft.net> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Sun, 06 Jan 2019 08:55:44 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Taehee Yoo Date: Sun, 6 Jan 2019 14:34:52 +0900 > How about adding a new PF_UMH flag for task_struct->flags to identify > UMH process? > By using this flag, the exit_umh() can avoid unnecessary lookups. Yes, that might be more efficient and eliminate the high cost for non-UMH tasks.