On Mon, 2 Sep 2019 11:16:23 +0200 Peter Zijlstra <pet...@infradead.org> wrote:
> in sched_dl_period_handler(). And do: > > + preempt_disable(); > max = (u64)READ_ONCE(sysctl_sched_dl_period_max) * NSEC_PER_USEC; > min = (u64)READ_ONCE(sysctl_sched_dl_period_min) * NSEC_PER_USEC; > + preempt_enable(); Hmm, I'm curious. Doesn't the preempt_disable/enable() also add compiler barriers which would remove the need for the READ_ONCE()s here? -- Steve
