64/128 bucket allocation failures

I'm seeing these allocation failures on a -current box (today's) with more
than enough free RAM ..

imb@toshi:/home/imb> vmstat -z
ITEM SIZE LIMIT USED FREE REQUESTS
FAILURES

UMA Kegs: 128, 0, 76, 14, 76,
0
UMA Zones: 480, 0, 76, 4, 76,
0
UMA Slabs: 64, 0, 2647, 8, 25743,
0
UMA RCntSlabs: 104, 0, 237, 22, 237,
0
UMA Hash: 128, 0, 5, 25, 8,
0
16 Bucket: 76, 0, 52, 48, 70,
0
32 Bucket: 140, 0, 63, 21, 83,
0
64 Bucket: 268, 0, 116, 10, 165,
11
128 Bucket: 524, 0, 591, 4, 1316,
11270

[ .. snip .. ]

imb@toshi:/home/imb> top -d 1
last pid: 22624; load averages: 0.00, 0.00, 0.00
up 0+03:13:42
14:31:16
49 processes: 1 running, 48 sleeping
CPU states: % user, % nice, % system, % interrupt, % idle
Mem: 97M Active, 606M Inact, 246M Wired, 844K Cache, 112M Buf, 1044M Free
Swap: 1024M Total, 1024M Free

Any ideas?

Michael

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