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| author | Peter Zijlstra <peterz@infradead.org> | 2020-04-21 12:09:13 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-06-15 14:10:24 +0200 |
| commit | b1433395c4cc078b4382429e6d7dd1721714094f (patch) | |
| tree | b4e0c615afbce51478ec3c2555c4e3377d30ab8b | |
| parent | 93db9129fa4beb78e2227554d237e8db04ca514c (diff) | |
| download | linux-stable-b1433395c4cc078b4382429e6d7dd1721714094f.tar.gz linux-stable-b1433395c4cc078b4382429e6d7dd1721714094f.tar.bz2 linux-stable-b1433395c4cc078b4382429e6d7dd1721714094f.zip | |
sched,rcuperf: Convert to sched_set_fifo_low()
Because SCHED_FIFO is a broken scheduler model (see previous patches)
take away the priority field, the kernel can't possibly make an
informed decision.
Effectively no change.
Cc: paulmck@kernel.org
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
| -rw-r--r-- | kernel/rcu/rcuperf.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c index 16dd1e6b7c09..64249a045232 100644 --- a/kernel/rcu/rcuperf.c +++ b/kernel/rcu/rcuperf.c @@ -354,7 +354,6 @@ rcu_perf_writer(void *arg) int i_max; long me = (long)arg; struct rcu_head *rhp = NULL; - struct sched_param sp; bool started = false, done = false, alldone = false; u64 t; u64 *wdp; @@ -363,8 +362,7 @@ rcu_perf_writer(void *arg) VERBOSE_PERFOUT_STRING("rcu_perf_writer task started"); WARN_ON(!wdpp); set_cpus_allowed_ptr(current, cpumask_of(me % nr_cpu_ids)); - sp.sched_priority = 1; - sched_setscheduler_nocheck(current, SCHED_FIFO, &sp); + sched_set_fifo_low(current); if (holdoff) schedule_timeout_uninterruptible(holdoff * HZ); @@ -420,9 +418,7 @@ retry: started = true; if (!done && i >= MIN_MEAS) { done = true; - sp.sched_priority = 0; - sched_setscheduler_nocheck(current, - SCHED_NORMAL, &sp); + sched_set_normal(current, 0); pr_alert("%s%s rcu_perf_writer %ld has %d measurements\n", perf_type, PERF_FLAG, me, MIN_MEAS); if (atomic_inc_return(&n_rcu_perf_writer_finished) >= |