Please drop CONFIG_LATENCYTOP

[Rasmus Villemoes]

Hi,

This is a proposal to drop CONFIG_LATENCYTOP=y from Ubuntu's kernel
config. It increases the size of struct task_struct by almost a page
(3848 bytes to be precise; this is on x86_64), which is an increase of
about 170%. This precious kernel memory is almost never used for
anything.

If the popcon numbers are representative, less than 0.1% of the Ubuntu
users have even installed the userspace frontend package latencytop, and
of these, most never use it.

I think it is a safe bet that a developer capable of interpreting and
making use of the latencytop output would also be able to compile the
kernel with a custom .config.

Thanks,
Rasmus