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kernel: Fix up README.md

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The content about debug was no longer valid.

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
This commit is contained in:
Rolf Neugebauer 2018-01-12 18:24:53 +00:00
parent 430bea64c3
commit 2ed5334823
1 changed files with 1 additions and 23 deletions
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24
kernel/README.md
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@ -1,23 +1 @@
See [../docs/kernels.md](../docs/kernels.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:
```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
```
See [../docs/kernels.md](../docs/kernels.md) for more information on kernel builds.