> > i still think mandating -s is better.
> 
> A hybrid is possible: only if -s is specified, then 'trust' it as you
> propose.  Or even another mount flag to make -s behave that way. But
> even there, I still think you want a different number, as a kind of
> minimum-size reservation, with -s as the upper limit still. At least,
> that's what I'd want if I was to use it that way.
> 
> It all seems a bit over-wrought and unnecessary, and long past the
> point of being a useful discussion; I don't mean to prolong it here.

i don't understand why people want to use tmpfs without -s.
tmpfs without -s is unusable, at least for /tmp.
a size limitation is definitely necessary,
and -s is the easiest and reasonable one, IMO.

YAMAMOTO Takashi