SOSEND_LOAN trouble in MIPS

[coypu%SDF.ORG@localhost]

Hi,

in emulating pmax with gxemul I ran into an issue that:
  cat somefile | command

does not work if somefile is bigger than 4096 bytes (but does for
smaller, or if I use 'command somefile' instead).

using 'options SOSEND_NO_LOAN' in the kernel config 'fixes' it.
what will be a good way to figure out what is wrong?

also, many MIPS configs have it, would it make sense to just enable it
for all the ones that don't?

thanks