Re: [lkml] RE: self piping and context switching

[Jamie Lokier]

Alan Cox wrote:
> On Sad, 2003-09-13 at 03:56, Iker wrote:
> > More specifically, I was wondering if the write to the pipe or the call back
> > into poll involved anything that might prompt the scheduler to replace the
> > thread in this scenario.
> 
> Unless it happens to cause page faults or fill up the pipe nothing in
> paticular.  Sending a message to yourself down a pipe is pretty standard
> in event based programs as a way of turning a signal from asynchronous
> event and thus nuisance to handle into a message.

This "pretty standard" method is the reason Netscape 4.07 hangs on
computers which are too fast: It writes too many events to a pipe
before reading from the pipe, and the pipe fills.

Of course that is a programming error.  Just a reminder to be careful :)

-- Jamie
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