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drbd: use sched_setscheduler()

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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: Charlie Suffin <Charlie.Suffin@stratus.com>
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Philipp Reisner 2013-03-27 14:08:48 +01:00 • committed by Jens Axboe
parent 7c689e63a8
commit 3990e04df0
2 changed files with 5 additions and 3 deletions
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6
drivers/block/drbd/drbd_receiver.c
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@ -5257,9 +5257,11 @@ int drbd_asender(struct drbd_thread *thi)
bool ping_timeout_active = false; bool ping_timeout_active = false;
struct net_conf *nc; struct net_conf *nc;
int ping_timeo, tcp_cork, ping_int; int ping_timeo, tcp_cork, ping_int;
struct sched_param param = { .sched_priority = 2 };
current->policy = SCHED_RR; /* Make this a realtime task! */ rv = sched_setscheduler(current, SCHED_RR, &param);
current->rt_priority = 2; /* more important than all other tasks */ if (rv < 0)
conn_err(tconn, "drbd_asender: ERROR set priority, ret=%d\n", rv);
while (get_t_state(thi) == RUNNING) { while (get_t_state(thi) == RUNNING) {
drbd_thread_current_set_cpu(thi); drbd_thread_current_set_cpu(thi);

2
include/linux/drbd.h
View file

@ -52,7 +52,7 @@
#endif #endif
extern const char *drbd_buildtag(void); extern const char *drbd_buildtag(void);
#define REL_VERSION "8.4.2" #define REL_VERSION "8.4.3"
#define API_VERSION 1 #define API_VERSION 1
#define PRO_VERSION_MIN 86 #define PRO_VERSION_MIN 86
#define PRO_VERSION_MAX 101 #define PRO_VERSION_MAX 101