Gentoo Dtrace

[pingtoo]

When enable dtrace, those kernel configuration options must be static link in to kernel? Can they be set to as module? This question is conceptual as in I know this can be find from kconfig. But question is about is it better to have it static therefor lesser limitation or it does not matter.

And is there additional kernel stuff (files) required on file system in order for dtrace to function? (I mean beside user space dtraec utilities)

[sam_]

Thanks for playing with it! Really nice to see all the interest in it so far.

The kernel configuration options the ebuild marks (see https://wiki.gentoo.org/wiki/DTrace#Kernel_configuration) must be on, of course. As for whether they need to be a module or built-in "modules": there is better support for them being real modules for now. There are patches in gentoo-sources (not yet in the default config in gentoo-kernel so not in gentoo-kernel-bin but the patches are there too) which better support modules being built-in. The issue is obtaining range information when they're in the kernel image rather than separate modules. The only downside there is not being able to probe things in those affected modules.

No other stuff should be needed other than correct kernel configuration and dev-debug/dtrace installed.

TL;DR: Enable the kernel config options the ebuild mentions, prefer modules rather than built-in for now, install dev-debug/dtrace.

[pingtoo]

sam_,

Thank you for the information.