Index: /trunk/src/VBox/HostDrivers/Support/linux/Makefile
===================================================================
--- /trunk/src/VBox/HostDrivers/Support/linux/Makefile	(revision 61410)
+++ /trunk/src/VBox/HostDrivers/Support/linux/Makefile	(revision 61411)
@@ -294,7 +294,12 @@
 obj-m += $(MODULE).o
 
+JOBS := $(shell (getconf _NPROCESSORS_ONLN || grep -Ec '^processor|^CPU[0-9]' /proc/cpuinfo) 2>/dev/null)
+ifeq ($(JOBS),0)
+  JOBS := 1
+endif
+
 # OL/UEK: disable module signing for external modules -- we don't have any private key
 $(MODULE):
-	$(MAKE) KBUILD_VERBOSE=$(KBUILD_VERBOSE) SUBDIRS=$(CURDIR) SRCROOT=$(CURDIR) CONFIG_MODULE_SIG= -C $(KERN_DIR) modules
+	$(MAKE) KBUILD_VERBOSE=$(KBUILD_VERBOSE) SUBDIRS=$(CURDIR) SRCROOT=$(CURDIR) CONFIG_MODULE_SIG= -C $(KERN_DIR) -j$(JOBS) modules
 
 install: $(MODULE)
Index: /trunk/src/VBox/HostDrivers/VBoxNetAdp/linux/Makefile
===================================================================
--- /trunk/src/VBox/HostDrivers/VBoxNetAdp/linux/Makefile	(revision 61410)
+++ /trunk/src/VBox/HostDrivers/VBoxNetAdp/linux/Makefile	(revision 61411)
@@ -197,7 +197,12 @@
 obj-m += $(MODULE).o
 
+JOBS := $(shell (getconf _NPROCESSORS_ONLN || grep -Ec '^processor|^CPU[0-9]' /proc/cpuinfo) 2>/dev/null)
+ifeq ($(JOBS),0)
+  JOBS := 1
+endif
+
 # OL/UEK: disable module signing for external modules -- we don't have any private key
 $(MODULE):
-	$(MAKE) KBUILD_VERBOSE=$(KBUILD_VERBOSE) SUBDIRS=$(CURDIR) SRCROOT=$(CURDIR) CONFIG_MODULE_SIG= -C $(KERN_DIR) modules
+	$(MAKE) KBUILD_VERBOSE=$(KBUILD_VERBOSE) SUBDIRS=$(CURDIR) SRCROOT=$(CURDIR) CONFIG_MODULE_SIG= -C $(KERN_DIR) -j$(JOBS) modules
 
 install: $(MODULE)
Index: /trunk/src/VBox/HostDrivers/VBoxNetFlt/linux/Makefile
===================================================================
--- /trunk/src/VBox/HostDrivers/VBoxNetFlt/linux/Makefile	(revision 61410)
+++ /trunk/src/VBox/HostDrivers/VBoxNetFlt/linux/Makefile	(revision 61411)
@@ -201,7 +201,12 @@
 obj-m += $(MODULE).o
 
+JOBS := $(shell (getconf _NPROCESSORS_ONLN || grep -Ec '^processor|^CPU[0-9]' /proc/cpuinfo) 2>/dev/null)
+ifeq ($(JOBS),0)
+  JOBS := 1
+endif
+
 # OL/UEK: disable module signing for external modules -- we don't have any private key
 $(MODULE):
-	$(MAKE) KBUILD_VERBOSE=$(KBUILD_VERBOSE) SUBDIRS=$(CURDIR) SRCROOT=$(CURDIR) CONFIG_MODULE_SIG= -C $(KERN_DIR) modules
+	$(MAKE) KBUILD_VERBOSE=$(KBUILD_VERBOSE) SUBDIRS=$(CURDIR) SRCROOT=$(CURDIR) CONFIG_MODULE_SIG= -C $(KERN_DIR) -j$(JOBS) modules
 
 install: $(MODULE)
Index: /trunk/src/VBox/HostDrivers/VBoxPci/linux/Makefile
===================================================================
--- /trunk/src/VBox/HostDrivers/VBoxPci/linux/Makefile	(revision 61410)
+++ /trunk/src/VBox/HostDrivers/VBoxPci/linux/Makefile	(revision 61411)
@@ -200,7 +200,12 @@
 obj-m += $(MODULE).o
 
+JOBS := $(shell (getconf _NPROCESSORS_ONLN || grep -Ec '^processor|^CPU[0-9]' /proc/cpuinfo) 2>/dev/null)
+ifeq ($(JOBS),0)
+  JOBS := 1
+endif
+
 # OL/UEK: disable module signing for external modules -- we don't have any private key
 $(MODULE):
-	$(MAKE) KBUILD_VERBOSE=$(KBUILD_VERBOSE) SUBDIRS=$(CURDIR) SRCROOT=$(CURDIR) CONFIG_MODULE_SIG= -C $(KERN_DIR) modules
+	$(MAKE) KBUILD_VERBOSE=$(KBUILD_VERBOSE) SUBDIRS=$(CURDIR) SRCROOT=$(CURDIR) CONFIG_MODULE_SIG= -C $(KERN_DIR) -j$(JOBS) modules
 
 install: $(MODULE)
Index: /trunk/src/VBox/Installer/linux/Makefile.include.footer
===================================================================
--- /trunk/src/VBox/Installer/linux/Makefile.include.footer	(revision 61410)
+++ /trunk/src/VBox/Installer/linux/Makefile.include.footer	(revision 61411)
@@ -75,7 +75,12 @@
 obj-m += $(MODULE).o
 
+JOBS := $(shell (getconf _NPROCESSORS_ONLN || grep -Ec '^processor|^CPU[0-9]' /proc/cpuinfo) 2>/dev/null)
+ifeq ($(JOBS),0)
+  JOBS := 1
+endif
+
 # OL/UEK: disable module signing for external modules -- we don't have any private key
 $(MODULE):
-	$(MAKE) KBUILD_VERBOSE=$(KBUILD_VERBOSE) CONFIG_MODULE_SIG= -C $(KERN_DIR) SUBDIRS=$(CURDIR) SRCROOT=$(CURDIR) modules
+	$(MAKE) KBUILD_VERBOSE=$(KBUILD_VERBOSE) CONFIG_MODULE_SIG= -C $(KERN_DIR) SUBDIRS=$(CURDIR) SRCROOT=$(CURDIR) -j$(JOBS) modules
 
 modules_install: