Building Kernel and World with -j

[Lowell Gilbert]

Walter Parker <walterp at gmail.com> writes:

> For decades there has always been a warning not to do parallel builds of
> the kernel or the world (Linux kernel builds also suggest not to do this).
>
> Every once in a while, I see people post about 5 minutes. This only way I
> can see this happening is by doing a parallel build (-j 16 on a Xeon
> Monster box).
>
> Are parallel builds safe? If not, what are actual risk factors and can they
> be mitigated?

As a general rule, it's safe. But don't report failures from a
parallel build.

This is not so much an issue of parallel builds being unsupported
as of the logs being harder to read.