openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

sched,watchdog: Convert to sched_set_fifo() 

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 changes prio from 99 to 50.

Cc: wim@linux-watchdog.org
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2020-04-21 12:09:13 +02:00
parent 28d2f209cd
commit 94beddacb5
1 changed files with 1 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/watchdog/watchdog_dev.c
View File

@ -1144,14 +1144,13 @@ void watchdog_dev_unregister(struct watchdog_device *wdd)
int __init watchdog_dev_init(void) int __init watchdog_dev_init(void)
{ {
int err; int err;
struct sched_param param = {.sched_priority = MAX_RT_PRIO - 1,};
watchdog_kworker = kthread_create_worker(0, "watchdogd"); watchdog_kworker = kthread_create_worker(0, "watchdogd");
if (IS_ERR(watchdog_kworker)) { if (IS_ERR(watchdog_kworker)) {
pr_err("Failed to create watchdog kworker\n"); pr_err("Failed to create watchdog kworker\n");
return PTR_ERR(watchdog_kworker); return PTR_ERR(watchdog_kworker);
} }
sched_setscheduler(watchdog_kworker->task, SCHED_FIFO, &param); sched_set_fifo(watchdog_kworker->task);
err = class_register(&watchdog_class); err = class_register(&watchdog_class);
if (err < 0) { if (err < 0) {