On Wed, Jul 12, 2000 at 11:08:53AM +0200, Mikael Vidstedt wrote:
>
> I'm trying to use non-blocking asynchronous IO, setting a user-defined
> real-time signal to be sent when IO is completed on a socket. This works
> fine most of the time, and I get the specified signal when new data is
> available. However, sometimes signals appear to be lost. Debugging
> indicates that this happens when the remote end closes the socket. The
> problem only occurs when there are many sockets active, all using
> asynchronous IO, and many signals are to be sent. And, yes, I do check for
> SIGIO signals too, but none are sent (i.e. the IO list is not saturated).
>
> The sockets are created as (AF_INET, SOCK_STREAM), and are set to be
> O_NONBLOCK|O_ASYNC using fcntl(). The user-defined signal is the first
> real-time signal (value 32).
>
> Is this a known problem, and if so, is there a work-around?
Stephen Tweedie fixed it some time ago. The fix should be in one
of the 2.2.17pre kernels.
-Andi
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