Wait chain and spiking thread: pattern cooperation

Here is the simplified example of executive resource wait chain:

0: kd> !locks
**** DUMP OF ALL RESOURCE OBJECTS ****
KD: Scanning for held locks...

Resource @ 0x88094118    Exclusively owned
    Contention Count = 1461106
    NumberOfExclusiveWaiters = 172
     Threads: 87571600-01<*>
     Threads Waiting On Exclusive Access:
              87a0cd70       86e478b0       86d73270       87463908      
              86ed5020       872d3a08       87a0b228       87985020      
              870e4430       870adb00       88197500       86e06db0      
              87030db0       86d86db0       88a22288       86db07a0      
              86815c50       87524628       899d2020       86da03f0      
              86fc8db0       86e43b40       86d86ac8       87320690      
              86da2020       879c0108       86d8f7a8       86876370      
              87565150       87142020       879ddd30       86ff8990      
              86e5c770       867a7200       87a97c50       86e21020      
              86dac6e8       876d6db0       876fadb0       86e36408      
              86e621c8       8770adb0       86fd7c50       86db6ba8      
              86b87020       867ea2f8       870b60e8       889dc6d8      
              877ebae0       86e267a8       88a8a9f0       8737e5e8      
              86fc0780       87993c98       88aead28       872bedb0      
              899e5628       87523770       870aaaf0       8717b3b0      
              86e19db0       86e11db0       86e5a7a0       87038448      
              8743adb0       8816b9a0       880955f8       867f3db0      
              875c3430       8714a4f8       879b6020       87642598      
              86ec2b40       884a7c50       87200020       86880db0      
              86e2f988       866fb020       86ddfdb0       867c1bd8      
              86645020       868c0db0       87613db0       872b0020      
              88a56898       8770d9e0       8680b418       87014db0      
              865e0720       868c7af0       8733aaf0       86929508      
              8798f928       879cd378       8822ec50       8721adb0      
              876b25a0       87b5b598       8684baf0       86e48db0      
              86eb5b90       86d969a8       87039db0       87486020      
              86d8f3c0       8680edb0       86fddb88       885c2cb0      
              870ba890       86e2e4f8       8695b948       86e6fa28      
              88a42b88       86e58af0       86ddd2e0       8695b540      
              86817520       86975800       86817020       88b40b50      
              87271620       8695b2d0       867b44c8       880b6af8      
              870e1898       87c711e0       87a77210       8676bdb0      
              86734630       86878db0       86fd0c50       872a81f8      
              86e09020       880cf4f8       87178970       868a1508      
              870a9db0       8692c020       867a4020       868c9c50      
              890c74e0       8687c9a8       8692c4f8       880cf238      
              8708cac0       86ef5db0       86fa9db0       87158330      
              87979868       87a4f510       879a3510       87a1cdb0      
              87094020       87095db0       8705d2a8       87b0d5b0      
              870c0020       879eb660       8737e2e0       86ea7918      
              86e46a28       87a49198       87d61db0       87067db0      
              8730e598       86f97db0       8668d020       89d671b8      
              8732a5c8       89a00bb8       867fa020       86e2a020

KD: Scanning for held locks..

Resource @ 0x88aaabe8    Exclusively owned
    Contention Count = 97373
     Threads: 87178598-01<*>
KD: Scanning for held locks.

Resource @ 0x87712650    Exclusively owned
    Contention Count = 41716
    NumberOfExclusiveWaiters = 2
     Threads: 87178598-01<*>
     Threads Waiting On Exclusive Access:
              87571600       879f5648

KD: Scanning for held locks...

Resource @ 0x87736048    Exclusively owned
    Contention Count = 29109
    NumberOfExclusiveWaiters = 1
     Threads: 87ab30d0-01<*>
     Threads Waiting On Exclusive Access:
              87178598

KD: Scanning for held locks...

21056 total locks, 4 locks currently held

This is straight forward single wait chain (172 threads -> 87571600 -> 87178598 -> 87ab30d0) culminating in thread 87ab30d0 which loops in kernel mode (Spiking Thread):

0: kd> !thread 87ab30d0
THREAD 87ab30d0  Cid 3814.322c  Teb: 00000000 Win32Thread: 00000000 RUNNING on processor 3
Not impersonating
DeviceMap                 e1006e10
Owning Process            889d6d88       Image:         Application.exe
Wait Start TickCount      2518917        Ticks: 0
Context Switch Count      4057707            
UserTime                  00:00:00.000
KernelTime                01:26:13.906
*** WARNING: Unable to verify timestamp for driverA.sys
*** ERROR: Module load completed but symbols could not be loaded for driverA.dll
Start Address driverA (0xbfa1c930)
Stack Init ae8ec000 Current ae8eae7c Base ae8ec000 Limit ae8e9000 Call 0
Priority 13 BasePriority 13 PriorityDecrement 0
ChildEBP RetAddr  Args to Child             
WARNING: Stack unwind information not available. Following frames may be wrong.
f773d3b0 ae8eaf40 00000010 00000000 00000000 driverA+0×25880

- Dmitry Vostokov @ DumpAnalysis.org -

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