From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: Sender: Tejun Heo Date: Fri, 15 Sep 2017 08:51:15 -0700 From: Tejun Heo To: Shaohua Li Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, lizefan@huawei.com, tglx@linutronix.de, kernel-team@fb.com, axboe@kernel.dk, Shaohua Li Subject: Re: [PATCH V3 1/4] kthread: add a mechanism to store cgroup info Message-ID: <20170915155115.GG378890@devbig577.frc2.facebook.com> References: <9649525546c2a69f22c7ec5a87858affece87160.1505422351.git.shli@fb.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <9649525546c2a69f22c7ec5a87858affece87160.1505422351.git.shli@fb.com> List-ID: On Thu, Sep 14, 2017 at 02:02:04PM -0700, Shaohua Li wrote: > From: Shaohua Li > > kthread usually runs jobs on behalf of other threads. The jobs should be > charged to cgroup of original threads. But the jobs run in a kthread, > where we lose the cgroup context of original threads. The patch adds a > machanism to record cgroup info of original threads in kthread context. > Later we can retrieve the cgroup info and attach the cgroup info to jobs. > > Since this mechanism is only required by kthread, we store the cgroup > info in kthread data instead of generic task_struct. > > Signed-off-by: Shaohua Li Acked-by: Tejun Heo Thanks. -- tejun