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Commit 3990e04d authored by Philipp Reisner's avatar Philipp Reisner Committed by Jens Axboe
Browse files

drbd: use sched_setscheduler() 



It was unnoticed for some time that assigning to current->policy is
no longer sufficient to set a real time priority for a kernel thread.

Reported-by: default avatarCharlie Suffin <Charlie.Suffin@stratus.com>
Signed-off-by: default avatarPhilipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: default avatarLars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 7c689e63

drivers/block/drbd/drbd_receiver.c

+4 −2
Original line number Diff line number Diff line
@@ -5257,9 +5257,11 @@ int drbd_asender(struct drbd_thread *thi) 
	bool ping_timeout_active = false;

	struct net_conf *nc;

	int ping_timeo, tcp_cork, ping_int;

	struct sched_param param = { .sched_priority = 2 };



	current->policy = SCHED_RR;  /* Make this a realtime task! */

	current->rt_priority = 2;    /* more important than all other tasks */

	rv = sched_setscheduler(current, SCHED_RR, &param);

	if (rv < 0)

		conn_err(tconn, "drbd_asender: ERROR set priority, ret=%d\n", rv);



	while (get_t_state(thi) == RUNNING) {

		drbd_thread_current_set_cpu(thi);

include/linux/drbd.h

+1 −1
Original line number Diff line number Diff line
@@ -52,7 +52,7 @@ 
#endif



extern const char *drbd_buildtag(void);

#define REL_VERSION "8.4.2"

#define REL_VERSION "8.4.3"

#define API_VERSION 1

#define PRO_VERSION_MIN 86

#define PRO_VERSION_MAX 101