Allow to create swap zone larger than v_page_count / 2.

[kib]

Summary

If user configured maxswapzone tunable, just take the literal value for the initial zone sizing attempt. Before, it was only possible to reduce the zone by a tunable.

Reported by: jmg

[markj]

sys/vm/swap_pager.c

550

Perhaps, "taking the user's requested size or estimating the number we need..."?

583

Did you make this change because uma_zone_reserve_kva() can round up?

[kib]

Comment rewording.

[kib]

sys/vm/swap_pager.c

583

Yes, somebody noted it to me long time ago, but I did not considered it worth fixing alone.