sched,bL_switcher: Convert to sched_set_fifo*()
authorPeter Zijlstra <peterz@infradead.org>
Tue, 21 Apr 2020 10:09:13 +0000 (12:09 +0200)
committerPeter Zijlstra <peterz@infradead.org>
Mon, 15 Jun 2020 12:10:20 +0000 (14:10 +0200)
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.

In this case, use fifo_low, because it only cares about being above
SCHED_NORMAL. Effectively no change in behaviour.

Cc: rmk+kernel@arm.linux.org.uk
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
arch/arm/common/bL_switcher.c

index 746e1fce777eb2bc1f00a51d7b2f99026457e67e..9a9aa53547a6b073c598c27ca9269271adb18a06 100644 (file)
@@ -270,12 +270,11 @@ static struct bL_thread bL_threads[NR_CPUS];
 static int bL_switcher_thread(void *arg)
 {
        struct bL_thread *t = arg;
-       struct sched_param param = { .sched_priority = 1 };
        int cluster;
        bL_switch_completion_handler completer;
        void *completer_cookie;
 
-       sched_setscheduler_nocheck(current, SCHED_FIFO, &param);
+       sched_set_fifo_low(current);
        complete(&t->started);
 
        do {