putting fedora on a (memory) diet... some suggestions for the kernel config

[John Reiser]

Jon Masters wrote:
> [snipped discussion about __log_buf specifically, but this seems general:]
> Personally, I think kernel config is one of the last places to cleanup
> after regular apps are taken care of.

Kernel config is the first place to pick low-hanging fruit.
Inflating CONFIG_NR_CPUS from 64 to 255 steals 3MB of physical RAM
from the entire workload.  There are many servers (both in numbers
and percentage) with <=4 CPUs and <=1GB RAM where that 3MB could be
used much more productively than by sparse static irq_* tables.

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