| Date | Fri, 13 Jul 2018 11:21:53 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 08/10] psi: pressure stall information for CPU, memory, and IO |
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On Thu, Jul 12, 2018 at 01:29:40PM -0400, Johannes Weiner wrote: > +static inline void psi_ttwu_dequeue(struct task_struct *p) > +{ > + if (psi_disabled) > + return; > + /* > + * Is the task being migrated during a wakeup? Make sure to > + * deregister its sleep-persistent psi states from the old > + * queue, and let psi_enqueue() know it has to requeue. > + */ > + if (unlikely(p->in_iowait || (p->flags & PF_MEMSTALL))) { > + struct rq_flags rf; > + struct rq *rq; > + int clear = 0; > + > + if (p->in_iowait) > + clear |= TSK_IOWAIT; > + if (p->flags & PF_MEMSTALL) > + clear |= TSK_MEMSTALL; > + > + rq = __task_rq_lock(p, &rf); > + update_rq_clock(rq); > + psi_task_change(p, rq_clock(rq), clear, 0); > + p->sched_psi_wake_requeue = 1; > + __task_rq_unlock(rq, &rf); > + } > +}
Still NAK, what happened to this here:
https://lkml.kernel.org/r/20180514083353.GN12217@hirez.programming.kicks-ass.net
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