[Verse 1]
In the kernel space where threads collide
Locks are spinning, nowhere to hide
When contention builds and cycles waste
We need the tools to track and trace
Lockdep watching every move we make
Finding deadlocks before systems break
[Chorus]
Lock, stock, and deadlock detection
Spinlock spinning needs inspection
Lockdep graphs will show the way
Maps dependencies every day
When threads are waiting in a chain
Debug the locks to break the pain
[Verse 2]
Two threads holding, both threads waiting
Circular dependency they're creating
Thread A wants what Thread B owns
Thread B waits while Thread A holds
Classic deadlock, ABBA pattern
System frozen, performance shattered
[Chorus]
Lock, stock, and deadlock detection
Spinlock spinning needs inspection
Lockdep graphs will show the way
Maps dependencies every day
When threads are waiting in a chain
Debug the locks to break the pain
[Verse 3]
Enable lockdep in your kernel config
Warning messages fill up the log
Lock validator tracks acquisition order
Builds dependency graph at every border
When violation happens it will shout
Before the deadlock can play out
[Bridge]
Ftrace and perf will show the stats
Where spinlocks spend time being fat
Lock contention in the flame graph peaks
Find the hotspots that your system seeks
Hierarchical locking saves the day
Always acquire in the same order way
[Chorus]
Lock, stock, and deadlock detection
Spinlock spinning needs inspection
Lockdep graphs will show the way
Maps dependencies every day
When threads are waiting in a chain
Debug the locks to break the pain
[Outro]
Prevention better than detection
Design your locks with clear direction
Lock ordering prevents the mess
Lockdep helps but can't fix poor process
Debug your locks before they bite
Keep your system running right