在bash subshel??l中可以调用一个函数作为后台作业吗？

Yadda() {
  # time-consuming processes that must take place sequentially
  # the result will be appended >> $OUTFILE
  # $OUTFILE is set by the main body of the script
  # No manipulation of variables in the main body
  # Only local-ly defined variables are manipulated
}

我是否允许在子shell中调用该函数作为后台工作？例如.：

OUTFILE=~/result
for PARM in $PARAMLIST; do
  ( Yadda $PARM ) &
done
wait
cat $OUTFILE

你怎么看？