Do we need pre-allocate WAL files during end-of-recovery checkpoint?

Hi,

The function PreallocXlogFiles doesn't get called during
end-of-recovery checkpoint in CreateCheckPoint, see [1]. The server
becomes operational after the end-of-recovery checkpoint and may need
WAL files. However, I'm not sure how beneficial it is going to be if
the WAL is pre-allocated (as PreallocXlogFiles just allocates only 1
extra WAL file).

Thoughts?

[1]
/*
* An end-of-recovery checkpoint is really a shutdown checkpoint, just
* issued at a different time.
*/
if (flags & (CHECKPOINT_IS_SHUTDOWN | CHECKPOINT_END_OF_RECOVERY))
shutdown = true;
else
shutdown = false;

/*
* Make more log segments if needed. (Do this after recycling old log
* segments, since that may supply some of the needed files.)
*/
if (!shutdown)
PreallocXlogFiles(recptr, checkPoint.ThisTimeLineID);

Regards,
Bharath Rupireddy.