>3955MiB of swap space

[dt71 at gmx.com]

I have 4 hard drives, each containing a swap partition of size 1023MiB. I get:

warning: total configured swap (1178880 pages) exceeds maximum recommended amount (1012480 pages).
warning: increase kern.maxswzone or reduce amount of swap.

Is the warning safe to ignore? I assume that only 3955MiB of swap space will be used instead of 4092MiB, because using more would cause overhead. I do not prefer to repartition the drives for them to have swap partitions each of size (3955/4)MiB.

By the way, is swapping distributed evenly among the drives? How? Is there a downfall when one of the drives is outstandingly slow?