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net: disable MSG_DONTWAIT

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Thomas Schoebel-Theuer 2013-11-26 16:51:41 +01:00
parent 2bdc298224
commit b60b0887e8
1 changed files with 1 additions and 5 deletions
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6
kernel/mars_net.c
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@ -510,11 +510,7 @@ int mars_recv_raw(struct mars_socket *msock, void *buf, int minlen, int maxlen)
struct msghdr msg = {
.msg_iovlen = 1,
.msg_iov = (struct iovec*)&iov,
#if 0 // There seems to be a race in the kernel: sometimes kernel_recvmsg() blocks forever on a shutdown socket even when sk->sk_rcvtimeo is set. Workaround by using noblocking IO (although it is conceptually broken and may lead to unnecessary throughput degradation)
.msg_flags = 0 | MSG_WAITALL | MSG_NOSIGNAL,
#else
.msg_flags = 0 | MSG_DONTWAIT | MSG_NOSIGNAL,
#endif
.msg_flags = MSG_NOSIGNAL,
};
struct socket *sock = msock->s_socket;