>The option has disappeared from menu config.
>
>I know it didn't work (or at least, not last time I tried it) but is this
>a permanent ommision or a mistake?
There are not sensitive performance penalities removing the CONFIG_OPTION.
Linus removed it in latest kernels (I think because the code is more clean
without #ifdefs). To enable it use the kernel parameter profile=4.
If you are interested in real profiling (accounting _all_ functions run by
the kernel, not only the one running at timer interrupt time, and so the
one that run with interrupt enabled) apply my latest port of patch-ikd
against 114 that include my real profiling hack:
ftp://e-mind.com/pub/linux/kernel-patches/
Andrea[s] Arcangeli
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