Hi,
Does the attached patch fix the problem for you?
--
Mikolaj Golub
Index: sys/kern/uipc_socket.c
===================================================================
--- sys/kern/uipc_socket.c (revision 220485)
+++ sys/kern/uipc_socket.c (working copy)
@@ -1845,10 +1845,16 @@ dontblock:
}
SBLASTRECORDCHK(&so->so_rcv);
SBLASTMBUFCHK(&so->so_rcv);
- error = sbwait(&so->so_rcv);
- if (error) {
- SOCKBUF_UNLOCK(&so->so_rcv);
- goto release;
+ /*
+ * We could receive some data while was notifying the
+ * the protocol. Skip blocking in this case.
+ */
+ if (so->so_rcv.sb_mb == NULL) {
+ error = sbwait(&so->so_rcv);
+ if (error) {
+ SOCKBUF_UNLOCK(&so->so_rcv);
+ goto release;
+ }
}
m = so->so_rcv.sb_mb;
if (m != NULL)
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