________________________________________ 发件人: Thomas Gleixner <tglx@xxxxxxxxxxxxx> 发送时间: 2020年10月28日 16:30 收件人: Zhang, Qiang; pmladek@xxxxxxxx; tj@xxxxxxxxxx 抄送: akpm@xxxxxxxxxxxxxxxxxxxx; linux-mm@xxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx 主题: Re: [PATCH v2] kthread_worker: re-set CPU affinities if CPU come online [Please note this e-mail is from an EXTERNAL e-mail address] On Wed, Oct 28 2020 at 15:30, qiang zhang wrote: > From: Zqiang <qiang.zhang@xxxxxxxxxxxxx> > > When someone CPU offlined, the 'kthread_worker' which bind this CPU, > will run anywhere, if this CPU online, recovery of 'kthread_worker' > affinity by cpuhp notifiers. > > Signed-off-by: Zqiang <qiang.zhang@xxxxxxxxxxxxx> > --- > v1->v2: > rename variable kworker_online to kthread_worker_online. > add 'cpuhp_node' and 'bind_cpu' init in KTHREAD_WORKER_INIT. > add a comment explaining for WARN_ON_ONCE. >How is that addressing any of the comments I made on V1 of this? Do you mean the following problem: "The dynamic hotplug states run late. What's preventing work to be queued on such a worker before it is bound to the CPU again?" Thanks Qiang > >Thanks, > > tglx
