Custom Kernel fun, which (extra) flags do you enable?

Hi all - was wondering if this was much of a thing here; if/when you compile a custom kernel, are their any particular config flags that you tend to enable and/or reach for?

If so why, do please share any insights and experiences.

Also - as an ancillary discussion point, share any books that you’ve enjoyed over the years that go over kernel development aspects.

The optimize for size flag. Just because it makes the kernel smaller. And I am a big fan of thinking micro.

Just because I find it amusing to have them…

HFS_FS
AFFS_FS
HPFS_FS
SYSV_FS
UFS_FS

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