/kind bug

What steps did you take and what happened:

buffers.PutBuffer used to discard buffers larger than 256 bytes. That got dropped as an unnecessary safeguard, but was called out again as something that might be useful in kubernetes/kubernetes#115277 (review)

What did you expect to happen:

PutBuffer should simply ignore buffers larger than 256 bytes and let the garbage collector free them.

/assign