Re: [Xenomai-help] rtpipe consistency problems

[Philippe Gerum <rpm@xenomai.org>]

Ulf Karlsson wrote:
> Hi,
> 
> I encounter a problem with rtpipes where the packets are being being
> "locked up" inside the pipe, that is the read(2) call waiting for the
> data does not return, Furthermore, it appears like I lose packets in
> the pipe.
> 
> I have attached a two simple C-programs that demonstrate this behavior.
> 
> The program linux-pipe.c writes increasing integer values to the pipe
> and expects to be able to read the same value back from the pipe,
> while the program xeno-pipe.c reads an integer from the pipe and
> instantly writes the very same value back.
> 
> I am using a 2.6.20.21 kernel together with xenomai 2.4.0.
>

I can't reproduce this issue here, on the very same kernel/xenomai
combo. Looking at the pipe code, a closing regular Linux side
(linux-pipe) explicitly flushes the real-time output queue, so I just
don't get how any lingering data could be delivered across a pipe close.
Weird.

Could you send your .config? TIA,

-- 
Philippe.