Comment 13 for bug 1395547

I ran a strace on the xfsettingsd pid, logged out, logged in and I could see a lot of these repeating:

poll([{fd=3, events=POLLIN|POLLOUT}], 1, 4294967295) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{"\20\0\3\0\3\0\0\0AltL", 12}, {NULL, 0}, {"", 0}], 3) = 12
poll([{fd=3, events=POLLIN}], 1, 4294967295) = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"\1\0\213\346\0\0\0\0\232\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 4096}], msg_controllen=0, msg_flags=0}, 0) = 32
recvmsg(3, 0x7fffc492a350, 0) = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(3, 0x7fffc492a350, 0) = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=3, events=POLLIN|POLLOUT}], 1, 4294967295) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{"\20\0\5\0\n\0\0\0LevelThree\0\0", 20}, {NULL, 0}, {"", 0}], 3) = 20
poll([{fd=3, events=POLLIN}], 1, 4294967295) = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"\1\0\214\346\0\0\0\0\233\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 4096}], msg_controllen=0, msg_flags=0}, 0) = 32
recvmsg(3, 0x7fffc492a350, 0) = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(3, 0x7fffc492a350, 0) = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=3, events=POLLIN|POLLOUT}], 1, 4294967295) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{"\20\0\3\0\4\0\0\0LAlt", 12}, {NULL, 0}, {"", 0}], 3) = 12
poll([{fd=3, events=POLLIN}], 1, 4294967295) = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name(0)=NULL, msg_iov(1)=[{"\1\0\215\346\0\0\0\0\234\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 4096}], msg_controllen=0, msg_flags=0}, 0) = 32
recvmsg(3, 0x7fffc492a350, 0) = -1 EAGAIN (Resource temporarily unavailable)
recvmsg(3, 0x7fffc492a350, 0) = -1 EAGAIN (Resource temporarily unavailable)

The values are different between the calls as you can see (though usually similar), but they seem to be repeating endlessly, till the system settles down several minutes down the road, when it all stops.

Not sure if relevant, let me know if I can provide any information that could help track the issue down.