When I run either the current or the Dec. 21 version pppd with the
current kernel, it eventually hangs.  After a long time (typically
about 10 Megabytes or so have come in over the interface), I start
getting buffer full messages back from ping and traceroute.  The last
few times it seemed to happen when there was also heavy disk activity,
but I'm not sure if that was always the case.  Pppd itself is
unkillable (even with SIGKILL).

The problem goes away when I run my old (Dec. 21) kernel.

I'm using 16550 uarts on a 486 PC.

Any ideas?

Thanks,
David