Petr,
On Tue, Oct 27 2020 at 17:39, Petr Mladek wrote:
> On Mon 2020-10-26 14:52:13, qiang.zh...@windriver.com wrote:
>> From: Zqiang
>>
>> When someone CPU offlined, the 'kthread_worker' which bind this CPU,
>> will run anywhere, if this CPU online, recovery of 'kthread_worker'
>> affinity by c
On Mon 2020-10-26 14:52:13, qiang.zh...@windriver.com wrote:
> From: Zqiang
>
> 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.
I am not familiar with CPU hotplug notifiers.
Hello, Petr.
On Mon, Oct 26, 2020 at 05:45:55PM +0100, Petr Mladek wrote:
> > I don't think this works. The kthread may have changed its binding while
> > running using set_cpus_allowed_ptr() as you're doing above. Besides, when a
> > cpu goes offline, the bound kthread can fall back to other cpus
On Mon 2020-10-26 09:50:11, Tejun Heo wrote:
> On Mon, Oct 26, 2020 at 02:52:13PM +0800, qiang.zh...@windriver.com wrote:
> > @@ -737,8 +741,11 @@ __kthread_create_worker(int cpu, unsigned int flags,
> > if (IS_ERR(task))
> > goto fail_task;
> >
> > - if (cpu >= 0)
> > + if (c
On Mon, Oct 26, 2020 at 02:52:13PM +0800, qiang.zh...@windriver.com wrote:
> @@ -737,8 +741,11 @@ __kthread_create_worker(int cpu, unsigned int flags,
> if (IS_ERR(task))
> goto fail_task;
>
> - if (cpu >= 0)
> + if (cpu >= 0) {
> kthread_bind(task, cpu);
From: Zqiang
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
---
include/linux/kthread.h | 2 ++
kernel/kthread.c| 35 +++
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