Hi Brian,
here's a patch for parallel kernel builds. It reduces the build time
significantly on SMP machines (as expected).
Regards,
Erich
--- make.d/kernel.rul.orig 2005-07-27 19:29:16.000000000 +0200
+++ make.d/kernel.rul 2005-07-27 19:34:00.000000000 +0200
@@ -126,6 +126,9 @@
$(SI_INSTALL) -m 644 $(LINUX_CONFIG) \
$(BOOT_BIN_DEST)/config
+# determine number of CPUs of current machine for parallel build
+NCPUS = $(shell grep -c ^processor /proc/cpuinfo)
+
# build the kernel that autoinstall clients will boot from during
# autoinstallation
PHONY += kernel
@@ -135,11 +138,11 @@
$(LINUX_IMAGE): $(SRC_DIR)/patched_kernel-stamp $(INITRD_DIR)/initrd.img
cp $(TOPDIR)/initrd_source/initrd.img \
${LINUX_SRC}/arch/ppc64/boot/ramdisk.image.gz
- $(MAKE) -C $(LINUX_SRC) $(LINUX_TARGET)
+ $(MAKE) -C $(LINUX_SRC) -j $(NCPUS) $(LINUX_TARGET)
mkdir -p $(TOPDIR)/tmp
else
$(LINUX_IMAGE): $(SRC_DIR)/patched_kernel-stamp
- $(MAKE) -C $(LINUX_SRC) $(LINUX_TARGET)
+ $(MAKE) -C $(LINUX_SRC) -j $(NCPUS) $(LINUX_TARGET)
mkdir -p $(TOPDIR)/tmp
endif
@@ -172,7 +175,7 @@
$(SRC_DIR)/modules_build-stamp: $(LINUX_IMAGE)
rm -fr $(TOPDIR)/tmp/kernel_modules
- $(MAKE) -C $(LINUX_SRC) modules
+ $(MAKE) -C $(LINUX_SRC) -j $(NCPUS) modules
touch $(SRC_DIR)/modules_build-stamp
PHONY += kernel_clean
