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linuxkit/kernel/README.md
Justin Cormack 3f81edee37 Move kernel directory to top level
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
2017-02-04 09:17:16 +01:00

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Temporary non modular kernel config for pinata alpha
TODO: build with Alpine and/or use Alpine kernels - needs some patches.
The build is mostly silent. To view the output use `docker log -f <containerid>`. The build creates multiple containers, so multiple
invocations may be necessary. To view the full build output one may also invoke `docker build .` and then copy the build artefacts from the image afterwards.
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:
```diff
--- 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
```