mirror of
https://github.com/linuxkit/linuxkit.git
synced 2026-04-04 19:59:29 +00:00
f44421042e
Building debug kernels (with additional run time checks and debugging) was broken a few commits back. This adds back support for building debug kernels. In addition, it builds and uploads debug kernels for selected kernel series (4.9.x LTS and latest stable). The tag for these kernels has a "_dbg" suffix. Update documentation. Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
See ../docs/kernel-patches.md for more information on kernel builds.
To build with various debug options enabled, build the kernel with
make DEBUG=1. The options enabled are listed in kernel_config.debug.
This allocates a significant amount of memory on boot and you may need to
adjust the kernel config on some systems. Specifically:
--- a/alpine/kernel/kernel_config
+++ b/alpine/kernel/kernel_config
@@ -415,8 +415,8 @@ CONFIG_DMI=y
# CONFIG_CALGARY_IOMMU is not set
CONFIG_SWIOTLB=y
CONFIG_IOMMU_HELPER=y
-CONFIG_MAXSMP=y
-CONFIG_NR_CPUS=8192
+CONFIG_MAXSMP=n
+CONFIG_NR_CPUS=8
# CONFIG_SCHED_SMT is not set
CONFIG_SCHED_MC=y
# CONFIG_PREEMPT_NONE is not set