Re: RCU: Call touch_nmi_watchdog() while printing stall warnings

Sergey Senozhatsky
2018-01-11T00:45:14Z

On (01/10/18 06:57), Tejun Heo wrote:
[..]
> > diff --git a/kernel/workqueue.c b/kernel/workqueue.c
> > index 9960f8842b31..649c00a9af12 100644
> > --- a/kernel/workqueue.c
> > +++ b/kernel/workqueue.c
> > @@ -48,6 +48,7 @@
> > #include <linux/moduleparam.h>
> > #include <linux/uaccess.h>
> > #include <linux/sched/isolation.h>
> > +#include <linux/nmi.h>
> >
> > #include "workqueue_internal.h"
> >
> > @@ -4473,6 +4474,8 @@ void show_workqueue_state(void)
> > if (pwq->nr_active || !list_empty(&pwq->delayed_works))
> > show_pwq(pwq);
> > spin_unlock_irqrestore(&pwq->pool->lock, flags);
> > +
> > + touch_nmi_watchdog();
>
> Can you send a patch w/ signed-off-by adding touch_nmi_watchdog() to
> both outer loops in that function. Theoretically, we can have a lot
> of pools too.

thanks. will do.

-ss