Anyone else seeing uma_zalloc_arg panics?

Hi *

Anyone else seeing panics like this?

This is CURRENT, amd64, 2 CPUs, source synced on Thursday 21st Nov evening GMT sometime.

+panic: uma_zalloc_arg: Returning an empty bucket.
+cpuid = 1
+KDB: stack backtrace:
+db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe003c7dd820
+kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe003c7dd8d0
+vpanic() at vpanic+0x126/frame 0xfffffe003c7dd910
+kassert_panic() at kassert_panic+0x136/frame 0xfffffe003c7dd980
+uma_zalloc_arg() at uma_zalloc_arg+0x49a/frame 0xfffffe003c7dd9f0
+bucket_alloc() at bucket_alloc+0x8b/frame 0xfffffe003c7dda10
+uma_zfree_arg() at uma_zfree_arg+0x2a1/frame 0xfffffe003c7dda70
+bucket_cache_drain() at bucket_cache_drain+0x1b/frame 0xfffffe003c7ddaa0
+zone_drain_wait() at zone_drain_wait+0xd1/frame 0xfffffe003c7ddb00
+uma_reclaim() at uma_reclaim+0x42d/frame 0xfffffe003c7ddb30
+vm_pageout() at vm_pageout+0x3bc/frame 0xfffffe003c7ddbb0
+fork_exit() at fork_exit+0x84/frame 0xfffffe003c7ddbf0
+fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe003c7ddbf0
+--- trap 0, rip = 0, rsp = 0xfffffe003c7ddcb0, rbp = 0 ---
+KDB: enter: panic

M
-- 
Mark R V Murray