From: Rainer Weikusat
Date: Sun, 06 Dec 2015 21:11:38 +
> The current unix_dgram_recvsmg code acquires the u->readlock mutex in
> order to protect access to the peek offset prior to calling
> __skb_recv_datagram for actually receiving data. This implies that a
> blocking reader will go to sle
The current unix_dgram_recvsmg code acquires the u->readlock mutex in
order to protect access to the peek offset prior to calling
__skb_recv_datagram for actually receiving data. This implies that a
blocking reader will go to sleep with this mutex held if there's
presently no data to return to user
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