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diff --git a/share/man/man7/tuning.7 b/share/man/man7/tuning.7
--- a/share/man/man7/tuning.7
+++ b/share/man/man7/tuning.7
@@ -601,6 +601,32 @@
section in the
.Xr sendfile 2
manual page for details.
+.Sh SCHEDULERS
+.Fx
+allows to have more then one scheduler specified in the kernel config,
+and desired scheduler selected from them at boot time.
+Right now the options are:
+.Bl -tag -width SCHED_4BSD
+.It Cd SCHED_ULE
+The modern scheduler with O(1) thread selection behavior
+.It Cd SCHED_4BSD
+Classic scheduler inherited from 4.x BSD
+.El
+.Pp
+At least one option must be specified.
+.Cd SCHED_ULE
+is used by default if compiled in.
+.Pp
+The
+.Va kern.sched.available
+sysctl provides the comma-separated list of available (compiled in)
+schedulers.
+The
+.Va kern.sched.name
+loader tunable can be set to select the desired scheduler at boot time.
+The
+.Va kern.sched.name
+sysctl reports which scheduler is used.
.Sh KERNEL CONFIG TUNING
There are a number of kernel options that you may have to fiddle with in
a large-scale system.

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