_noccache
In addition, disable `CONFIG_GCC_PLUGINS` when ccache is used as it's disruptive, and tweak ccache sloppiness with safe values. Those changes combined are giving us near 100% cache hit rate on hot cache.
No blog post about BMQ v5.6-r0 yet: https://gitlab.com/alfredchen/linux-bmq/-/commits/linux-5.6.y-bmq