linux-kernel - Re: recv() hangs until SIGCHLD ?

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Message-ID: <48F36311.5030303@motion-twin.com>
Date:	Mon, 13 Oct 2008 17:02:41 +0200
From:	Nicolas Cannasse <ncannasse@...ion-twin.com>
To:	Stephen Hemminger <shemminger@...tta.com>
CC:	linux-net@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: recv() hangs until SIGCHLD ?

Nicolas Cannasse a écrit :
>>> If there is data and the thread didn't wake up then that is a libc or 
>>> kernel problem;
>>> but if there is no data, then look for cases where earlier 
>>> interrupted io actually
>>> consumed the data already or blame the sending process not the receiver.
>>> Also are the sockets blocking or non-blocking?

One other thing :

We tried to use a poll(POLLIN) on the socket before entering the recv(). 
The poll() does exit (and we are looping in case of EINTR result) but 
after that recv() blocks infinitely.

Hope that helps,

Nicolas

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