[PATCH v6 4/4] Add system-wide tunables: Filters

[DJ Delorie]

Yury Khrustalev <yury.khrustalev@arm.com> writes:
> For example, right now, the value from GLIBC_TUNABLES overrides
> the default value. Now, which one has higher priority, env var or
> system-wide config?
>
> I have an opinion here but I don't want to impose it :)

I think the config needs to be able to choose from these (ignoring the
defaults, for now, because we *always* have defaults):

  1) system-wide
  2) env var

  1) system-wide only

  1) env var only (by not mentioning it in tunables.conf)

The only other non-Sisyphean option would be:

  1) system-wide
  2) env var if numerically larger (closer to +Inf)

  1) system-wide
  2) env var if numerically smaller (closer to -Inf)

but that obviously won't include non-numeric tunables.