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diff --git a/sys/compat/linux/linux_dummy.c b/sys/compat/linux/linux_dummy.c
--- a/sys/compat/linux/linux_dummy.c
+++ b/sys/compat/linux/linux_dummy.c
@@ -96,7 +96,6 @@
DUMMY(process_vm_writev);
/* Linux 3.8: */
DUMMY(finit_module);
-DUMMY(sched_setattr);
/* Linux 3.18: */
DUMMY(bpf);
/* Linux 3.19: */
diff --git a/sys/compat/linux/linux_misc.c b/sys/compat/linux/linux_misc.c
--- a/sys/compat/linux/linux_misc.c
+++ b/sys/compat/linux/linux_misc.c
@@ -1511,6 +1511,77 @@
return (sys_sched_get_priority_min(td, &bsd));
}
+int
+linux_sched_setattr(struct thread *td, struct linux_sched_setattr_args *args)
+{
+ struct linux_sched_attr attr;
+ struct sched_param bsd;
+ struct thread *tdt;
+ int error, policy;
+
+ if (args->attr == NULL || args->pid < 0 || args->flags != 0)
+ return (EINVAL);
+
+ error = copyin(args->attr, &attr, sizeof(attr));
+ if (error != 0)
+ return (error);
+
+ if (attr.size < LINUX_SCHED_ATTR_SIZE_VER0)
+ return (E2BIG);
+
+ switch (attr.sched_policy) {
+ case LINUX_SCHED_FIFO:
+ policy = SCHED_FIFO;
+ break;
+ case LINUX_SCHED_RR:
+ policy = SCHED_RR;
+ break;
+ case LINUX_SCHED_NORMAL:
+ if (attr.sched_priority != 0)
+ return (EINVAL);
+ policy = SCHED_OTHER;
+ break;
+ case LINUX_SCHED_BATCH:
+ case LINUX_SCHED_DEADLINE:
+ case LINUX_SCHED_IDLE:
+ /**
+ * NB: this technically isn't correct for scheduling policies
+ * known by Linux, however, we don't support mapping all of
+ * the scheduling policies from Linux's available values to
+ * the values available on FreeBSD.
+ */
+ /* FALLTHROUGH */
+ default:
+ return (EINVAL);
+ }
+
+ switch (attr.sched_policy) {
+ case LINUX_SCHED_FIFO:
+ case LINUX_SCHED_RR:
+ /*
+ * Map [1, LINUX_MAX_RT_PRIO - 1] to
+ * [0, RTP_PRIO_MAX - RTP_PRIO_MIN] (rounding down).
+ */
+ bsd.sched_priority =
+ (bsd.sched_priority - 1) *
+ (RTP_PRIO_MAX - RTP_PRIO_MIN + 1) /
+ (LINUX_MAX_RT_PRIO - 1);
+ break;
+ case LINUX_SCHED_NORMAL:
+ bsd.sched_priority = 0;
+ break;
+ }
+
+ tdt = linux_tdfind(td, args->pid, -1);
+ if (tdt == NULL)
+ return (ESRCH);
+
+ error = kern_sched_setscheduler(td, tdt, policy, &bsd);
+
+ PROC_UNLOCK(tdt->td_proc);
+ return (error);
+}
+
#define REBOOT_CAD_ON 0x89abcdef
#define REBOOT_CAD_OFF 0
#define REBOOT_HALT 0xcdef0123

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