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Kernel building question (Is -j8 safe and correct?)



Hello,

I'm trying to build a Debian bullseye kernel (with KASAN enabled, but that's irrelevant).
I'm following [1], and the critical command

$ fakeroot make -f debian/rules.gen binary-arch_i386_none_real

does not suggest using -j8 (or -jnumber_of_cores).

1. Is it safe to add -j8 ?
2. Will this indeed give me the speed up I want and expect on my multi-core processor?
3. If both of the above are true, why isn't something like that suggested on [1]?

Best,
Antonio

[1] https://kernel-team.pages.debian.net/kernel-handbook/ch-common-tasks.html#s-common-official


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