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jesnow
l33t
Joined: 26 Apr 2006
Posts: 856
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 Posted: Wed Jan 02, 2008 10:45 pm Post subject: Speed up kernel compilation |
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When building the kernel, make doesn't pay any attention to the MAKEOPTS variable set in /etc/make.conf. You can see this easily if you're running (e.g.) xosview during a kernel compile, as the load switches back and forth between the two cpus, just like it did in portage compiles before I discovered the MAKEOPTS variable.
You need to set MAKEOPTS="-j 5" as a global environment variable to take advantage of both processors during kernel and other non-portage compiles. There are many ways to do this, but the most correct to me seems to be to edit /etc/env.d/05gcc-i686-pc-linux-gnu and add:
Notice the space between the 'j' and '5', this is different than the MAKEOPTS variable in /etc/make.conf.
Then don't forget to
| Code: |
# env-update && source /etc/profile
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And watch both processors screaming away full bore on your next kernel compile.
Jon. |
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Januszzz
Guru
Joined: 04 Feb 2006
Posts: 367
Location: Opole, Poland
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| Posted: Wed Jan 02, 2008 11:46 pm Post subject: |
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I simply use:
| Code: | | make -j12 bzImage && make -j12 modules && make modules_install |
and genkernel also uses makeopts.
Anyway, nice post for those who frequently forget.
Janusz. |
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