David Kastrup <dak@gnu.org> writes:

> storm@cua.dk (Kim F. Storm) writes:
> 
> > storm@cua.dk (Kim F. Storm) writes:
> > 
> > > Could you try to set readmax to 1024 ?
> > >
> > > That may break UDP packet receive, but it isn't relevant for this case.
> > 
> > 
> > Could you also try the following patch (with readmax=4096).
> > 
> > I don't expect it to make a lot of difference, but just to rule out
> > the obvious...
> 
> [...]
> 
> Sorry for the delay, had to go climbing.  The patch does not cure the
> problem.  The problem still occurs with comparable severity.

However, the following patch cures everything then: