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65d36329e3
Add KERNEL_NR_CPUS option in Global build settings → Kernel build
options, allowing users to set maximum CPU count (2-512) for the image.
Defaults:
- x86_64: 512 CPUs (backward compatible)
- x86: 8 CPUs (fix broken single-CPU default)
Per-CPU data structures consume ~100-200KB each.
On a 4-core system configured to NR_CPUS=4, this frees approx 76 MB
of RAM: (512 - 4) × 150 KB = ~76 MB
Note: CONFIG_NR_CPUS_RANGE_{BEGIN,END}= and CONFIG_NR_CPUS_DEFAULT= are
set by the build system and will default to 2/512/64 per arch/x86/Kconfig
These are harmless metadata and don't affect memory allocation.
Note pending https://github.com/openwrt/openwrt/pull/21407
Signed-off-by: John Audia <therealgraysky@proton.me>
Link: https://github.com/openwrt/openwrt/pull/21078
Signed-off-by: Robert Marko <robimarko@gmail.com>