2.1.61: Problems with select() on serial port

Ulrich Windl (ulrich.windl@rz.uni-regensburg.de)
Mon, 10 Nov 1997 10:15:38 +0100

Yesterday I tried kernel 2.1.61 too see the improved select of 2.1
working.

I used xntpd (3-5.91) to monitor my DCF77 reference clock receiver
(The software uses selects with a short timeout around 1 second,
and the process runs real-time priority SCHED_FIFO).

The effect is that the software receives a few (around 5)
characters from the serial port every second (as it should be) and
then there's a pause of some seconds.

I can't explain it. Is this a well-known bug in 2.1.61?

Ulrich