[Verse 1] When applications hunger for space Kernel allocators join the race Buddy system splits the blocks in two Slab cache holds objects ready and new Virtual addresses masquerade the truth Physical pages scattered, that's the proof [Chorus] Page fault triggers, TLB miss stings Memory mapping, virtual rings Kernel heap, user stack divide I/O buffers where data hides MMU translates what programs see Memory management sets us free [Verse 2] DMA bypasses CPU control Direct to memory, that's the goal Buffer heads track dirty pages waiting Write-back cache needs no debating Page replacement algorithms choose LRU victims that we can lose [Chorus] Page fault triggers, TLB miss stings Memory mapping, virtual rings Kernel heap, user stack divide I/O buffers where data hides MMU translates what programs see Memory management sets us free [Bridge] Block devices queue the requests Elevator algorithms know what's best SCAN and C-SCAN seek the tracks Minimizing head movement, filling gaps Interrupt handlers steal the show When hardware signals need to flow [Verse 3] Copy on write saves precious RAM Fork creates but doesn't slam Shared libraries map just once Multiple processes take their hunts Swap space rescues memory tight Paging daemon works through night [Chorus] Page fault triggers, TLB miss stings Memory mapping, virtual rings Kernel heap, user stack divide I/O buffers where data hides MMU translates what programs see Memory management sets us free [Outro] From malloc calls to disk I/O Understanding makes performance grow Virtual memory's clever game Physical resources, different name Debug the bottlenecks you find With memory maps and I/O bind
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