From: Peter Zijlstra <peterz@infradead.org>
Date: Tue, 21 Apr 2020 10:09:13 +0000 (+0200)
Subject: sched,psi: Convert to sched_set_fifo_low()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2cca5426b9c108998bc03230cd6ae440f3e205ed;p=linux.git

sched,psi: 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.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
---

diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c
index e53b711bd6431..967732c0766c5 100644
--- a/kernel/sched/psi.c
+++ b/kernel/sched/psi.c
@@ -616,11 +616,8 @@ out:
 static int psi_poll_worker(void *data)
 {
 	struct psi_group *group = (struct psi_group *)data;
-	struct sched_param param = {
-		.sched_priority = 1,
-	};
 
-	sched_setscheduler_nocheck(current, SCHED_FIFO, &param);
+	sched_set_fifo_low(current);
 
 	while (true) {
 		wait_event_interruptible(group->poll_wait,