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=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,T_DKIMWL_WL_HIGH, USER_AGENT_MUTT 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 2AC79C4321A for ; Tue, 11 Jun 2019 19:52:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F3FF22173C for ; Tue, 11 Jun 2019 19:52:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560282740; bh=PXcELeAh7QnqgZv7oPtcpKm3982RnbLiEHV9NuK+rp8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=V0KxxOZlraX1KWRodFvdHPTAmFLpoX2mZCe3uPajVN4BWu0k6RqU7jU/4laXDOqiA ZWhl/0m8lElv/daB8qzC9MjPhV3G0Y3DSIncywf6t7TzXEld/wZm4KKmVoshP6G6Vp Rci+pInJX7uc+JLnSPJV/CILwf4khKX7uYV1+zIQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406301AbfFKTwP (ORCPT ); Tue, 11 Jun 2019 15:52:15 -0400 Received: from mail-pl1-f175.google.com ([209.85.214.175]:33231 "EHLO mail-pl1-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405039AbfFKTwO (ORCPT ); Tue, 11 Jun 2019 15:52:14 -0400 Received: by mail-pl1-f175.google.com with SMTP id g21so5580039plq.0; Tue, 11 Jun 2019 12:52:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=cHQwQdsrkTpqJAyug+FT0E9rG91BoWa0X7Lnvcu63U0=; b=sf4Wv0oOKP6ccpJ9YkQOGUDhSjYMBG+KudnxXTcqLAYPTss2vsI1fbeHmcwPPphcXk eATLNIRLct9/VRTkALmNlWMYfZd4ArOl2dDKv2RD398ontULghP25qT50pgbWNv4RPRF 77gUEK//iTYsdIcrlUK0eU8HjK4D6OkpZM4MQ+WSPhskB0w41UOsJhrx8kG0Sn5KXqpg W30qKAytIPB0KJaNA2/a92tHIIvpb7rkfdOzP2u/VtulBlUvKeF5aRsPWlUK4K9CTGn2 50YrHtyYEwlfXxS0bAkqes8kZlPigVckJQmBPYD/bHVUi4pGGlu4cvhg22lMAOvYaJt0 lHAw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to:user-agent; bh=cHQwQdsrkTpqJAyug+FT0E9rG91BoWa0X7Lnvcu63U0=; b=LNHBBXb4OIglVDkIc11t3Z2Kq5sg/xnML8Ds5skZnVguwuVE9XsAAjuR1y+SZwOCSg 8J+4E7voiM/HYiKcei1zrtm0REK3k7TihYnYVpJcvWAi7o4Xg4/PzUKHhhz6S0CjkWAA WEHmAIqGTEXSmuw9DgfMa4Ybfv0rVFN0Op0CQjziOEYABX3HUvGI/+sRF+/JAF1fK2kq 3/IwhyFk8hYxE9JXbaIdNYZiWQT69BpHjQdJYOFzj+TvvseIrbID7HiKoEpsZboAbtIu Tt/enagBPidZrxEJ9SOI8B0Y9dIjeyc+5Pc+FsL6ZwlQZ5CbSyPOyxmmzqRPuf/61w4l MtdA== X-Gm-Message-State: APjAAAUk2FFtwNnKCanztpHT85FZqOP6RyDrDT+2wf9oQ9S7CGJIzr0x dirtrBkJPUvuE0hUp8AoXBA= X-Google-Smtp-Source: APXvYqwtr7AdbQtXCjzK5M7+YTkrqbJhHbXBQ3iF70ArYweFUb7ISFWWhnZBb2Wk9bDXh3r0GQsgfw== X-Received: by 2002:a17:902:b592:: with SMTP id a18mr52750895pls.278.1560282733634; Tue, 11 Jun 2019 12:52:13 -0700 (PDT) Received: from localhost ([2620:10d:c091:500::2:1677]) by smtp.gmail.com with ESMTPSA id d4sm18814972pfc.149.2019.06.11.12.52.12 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 11 Jun 2019 12:52:12 -0700 (PDT) Date: Tue, 11 Jun 2019 12:52:10 -0700 From: Tejun Heo To: Mike Rapoport Cc: Daniel Jordan , hannes@cmpxchg.org, jiangshanlai@gmail.com, lizefan@huawei.com, bsd@redhat.com, dan.j.williams@intel.com, dave.hansen@intel.com, juri.lelli@redhat.com, mhocko@kernel.org, peterz@infradead.org, steven.sistare@oracle.com, tglx@linutronix.de, tom.hromatka@oracle.com, vdavydov.dev@gmail.com, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [RFC v2 0/5] cgroup-aware unbound workqueues Message-ID: <20190611195210.GK3341036@devbig004.ftw2.facebook.com> References: <20190605133650.28545-1-daniel.m.jordan@oracle.com> <20190605135319.GK374014@devbig004.ftw2.facebook.com> <20190606061525.GD23056@rapoport-lnx> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190606061525.GD23056@rapoport-lnx> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, On Thu, Jun 06, 2019 at 09:15:26AM +0300, Mike Rapoport wrote: > > Can you please go into more details on the use cases? > > If I remember correctly, the original Bandan's work was about using > workqueues instead of kthreads in vhost. For vhosts, I think it might be better to stick with kthread or kthread_worker given that they can consume lots of cpu cycles over a long period of time and we want to keep persistent track of scheduling states. Thanks. -- tejun