Rename the kern.vm.kmem.size tunable to the more logical vm.kmem_size. To

assure backward compatibility (conditional on !BURN_BRIDGES), look it up
by its old name first, and log a warning (but accept the setting) if it
was found.  If both the old and new name are defined, the new name takes
precedence.

Also export vm.kmem_size as a read-only sysctl variable; I find it hard to
tune a parameter when I don't know its default value, especially when that
default value is computed at boot time.

2 files changed, 6 insertions, 6 deletions

diff --git a/sys/boot/common/help.common b/sys/boot/common/help.common
index a6fd748..8b68157 100644
--- a/sys/boot/common/help.common
+++ b/sys/boot/common/help.common
@@ -244,7 +244,7 @@
 		Set the number of sendfile buffers to be allocated.  This
 		overrides the value determined when the kernel was compiled.
 
-	set kern.vm.kmem.size=<value>		VM_KMEM_SIZE
+	set vm.kmem_size=<value>		VM_KMEM_SIZE
 
 		Sets the size of kernel memory (bytes).  This overrides
 		the value determined when the kernel was compiled.
diff --git a/sys/boot/common/loader.8 b/sys/boot/common/loader.8
index 2712da1..ef9456b 100644
--- a/sys/boot/common/loader.8
+++ b/sys/boot/common/loader.8
@@ -451,11 +451,6 @@ Set the number of
 buffers to be allocated.
 Overrides
 .Dv NSFBUFS .
-.It Va kern.vm.kmem.size
-Sets the size of kernel memory (bytes).
-This overrides the value determined when the kernel was compiled.
-Modifies
-.Va VM_KMEM_SIZE .
 .It Va kern.maxswzone
 Limits the amount of KVM to be used to hold swap
 meta information, which directly governs the
@@ -499,6 +494,11 @@ Overrides the compile-time set value of
 or the preset default of 512.
 Must be a power of 2.
 .El
+.It Va vm.kmem_size
+Sets the size of kernel memory (bytes).
+This overrides the value determined when the kernel was compiled.
+Modifies
+.Va VM_KMEM_SIZE .
 .Ss BUILTIN PARSER
 When a builtin command is executed, the rest of the line is taken
 by it as arguments, and it is processed by a special parser which