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=-5.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS 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 E7E22C4338F for ; Thu, 5 Aug 2021 23:43:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CF64761156 for ; Thu, 5 Aug 2021 23:43:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240657AbhHEXnq (ORCPT ); Thu, 5 Aug 2021 19:43:46 -0400 Received: from mail.kernel.org ([198.145.29.99]:36990 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232947AbhHEXnp (ORCPT ); Thu, 5 Aug 2021 19:43:45 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5B78E60EB2; Thu, 5 Aug 2021 23:43:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1628207009; bh=w58TtpXdxVQMYcRjot/BTYZO8pkrGjEZNh6L8v/2WJ4=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=UUEFGevNi4F2G3B4NIJgheM9l/OAOY0gd/py6oIf/SWsV8tgl4PzfzPSBMx6gOZI8 7qz9Ef5dsFPMWsPSJQGp/CCRfEl11Cz4Dsw3ObmnM7VuvgICFQBVV58+f/5WnLgvvG t/92P0lMnP8sPctnLn0gRaAq3Kj8LU/PJtWY2nzM= Date: Thu, 5 Aug 2021 16:43:28 -0700 From: Andrew Morton To: chenguanyou Cc: mhocko@suse.com, chenguanyou@xiaomi.com, gpiccoli@canonical.com, keescook@chromium.org, linux-kernel@vger.kernel.org, lukas.bulwahn@gmail.com, vbabka@suse.cz Subject: Re: [PATCH v2] hungtask: add filter kthread Message-Id: <20210805164328.58213d35e45d81c363b2135e@linux-foundation.org> In-Reply-To: <20210805144720.30358-1-chenguanyou@xiaomi.com> References: <20210805144720.30358-1-chenguanyou@xiaomi.com> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.32; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 5 Aug 2021 22:47:20 +0800 chenguanyou wrote: > > Either those kernel threads should be fixed to use less sleep or > > annotate the sleep properly (TASK_IDLE). > > The API for debugging when we no need care kernel threads state. > Please explain this point in more detail?