malloc(M_WAITOK) of"Mbuf",forcing M_NOWAIT ......

I get lots of these messages on my console with a recent -CURRENT,
is this something known?

----------------------------------------------------------------
malloc(M_WAITOK) of "Mbuf", forcing M_NOWAIT with the following non-sleepable lo
cks held:
exclusive sleep mutex inp (rawinp) r = 0 (0xc2076090) locked _at_ /usr/src/sys/neti
net/raw_ip.c:742
exclusive sleep mutex rip r = 0 (0xc08bd6ec) locked _at_ /usr/src/sys/netinet/raw_i
p.c:725
Stack backtrace:
backtrace(2,c1bbc400,c1021b00,14,e5560b30) at backtrace+0x12
witness_warn(5,0,c07e56ea,c07caafb) at witness_warn+0x196
uma_zalloc_arg(c1021b00,e5560b54,2) at uma_zalloc_arg+0x3d
m_prepend(c1bbc400,14,2,c2076090,6400a8c0) at m_prepend+0x52
rip_output(c1bbc400,c1ddce4c,6400a8c0,c2076090,0) at rip_output+0x95
rip_send(c1ddce4c,0,c1bbc400,0,0) at rip_send+0xb5
sosend(c1ddce4c,0,e5560c88,c1bbc400,0) at sosend+0x4a1
soo_write(c1d6fdd0,e5560c88,c2059a80,0,c1d56c60) at soo_write+0x46
dofilewrite(c1d56c60,c1d6fdd0,4,bfbfa6b0,5ed) at dofilewrite+0xbb
write(c1d56c60,e5560d14,3,415,206) at write+0x3e
syscall(bfbf002f,bfbf002f,bfbf002f,bfbfedc0,bfbfedd0) at syscall+0x217
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (4), eip = 0x280d9e4f, esp = 0xbfbfa68c, ebp = 0xbfbfc6d8 ---
----------------------------------------------------------


--niki