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[209.85.220.41]) by mx.google.com with SMTPS id h3sor2688530plr.54.2019.06.11.12.52.13 for (Google Transport Security); Tue, 11 Jun 2019 12:52:14 -0700 (PDT) Received-SPF: pass (google.com: domain of htejun@gmail.com designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=sf4Wv0oO; spf=pass (google.com: domain of htejun@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=htejun@gmail.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org 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-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) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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