Re: [arch-general] CONFIG_CC_OPTIMIZE_FOR_SIZE is not set

Sascha Siegel schrieb:

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Hi,

can someone tell my whats the reason for building the arch-kernel with "# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set"?

Thank you!

Optimizing for size sacrifices performance. Read the gcc documentation about the -O{1,2,3,s} options.

I remember a few kernel devs recommending size. It was to reduce the number of cache misses and improve CPU cache utilisation, avoiding RAM and L2 cache. Fedora/RHEL appears to optimize for size. That was a while ago when I was doing some kernel stuff.... so I could be wrong.