WITNESS whine...

Mismatched locks to msleep(0xc1247d20, vmpfw):
  old 0xc073af20 (vm page queue mutex), new 0 (null)
Stack backtrace:
backtrace(1,c657c7e0,0,d9c14bcc,c0509a06) at 0xc0503b5a = backtrace+0x12
sleepq_add(c62bad00,c1247d20,0,c06b3fc5,0) at 0xc0521ccf = sleepq_add+0x1bf
msleep(c1247d20,c073af20,244,c06b3fc5,0) at 0xc0509a06 = msleep+0x29e
vm_page_sleep_if_busy(c1247d20,1,c06b3fc5) at 0xc05f6a55 = vm_page_sleep_if_busy
+0xa5
vm_fault(c633ddd4,8054000,2,8,c657c7e0) at 0xc05eb5f4 = vm_fault+0x31c
trap_pfault(d9c14d48,1,8054000,8054000,0) at 0xc06503ab = trap_pfault+0xe3
trap(2f,2f,2f,8054000,4) at 0xc064ff5a = trap+0x1e2
calltrap() at 0xc063f558 = calltrap+0x5
--- trap 0xc, eip = 0x28127eeb, esp = 0xbfbfebe0, ebp = 0xbfbfec18 ---
Mismatched locks to msleep(0xc13005b0, vmpfw):
  old 0xc073af20 (vm page queue mutex), new 0 (null)
Stack backtrace:
backtrace(1,c657c7e0,0,d9c14bcc,c0509a06) at 0xc0503b5a = backtrace+0x12
sleepq_add(c62ba5c0,c13005b0,0,c06b3fc5,0) at 0xc0521ccf = sleepq_add+0x1bf
msleep(c13005b0,c073af20,244,c06b3fc5,0) at 0xc0509a06 = msleep+0x29e
vm_page_sleep_if_busy(c13005b0,1,c06b3fc5) at 0xc05f6a55 = vm_page_sleep_if_busy
+0xa5
vm_fault(c633ddd4,8056000,2,8,c657c7e0) at 0xc05eb5f4 = vm_fault+0x31c
trap_pfault(d9c14d48,1,8056000,8056000,0) at 0xc06503ab = trap_pfault+0xe3
trap(2f,2f,2f,8056000,4) at 0xc064ff5a = trap+0x1e2
calltrap() at 0xc063f558 = calltrap+0x5
--- trap 0xc, eip = 0x28127eeb, esp = 0xbfbfebe0, ebp = 0xbfbfec18 ---

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