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Master embedded Linux kernel development
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Module 5
Interrupts, Deferred Work, & The Device Model
1
Linux Interrupt Handling: Top-Half and Bottom-Half
Explain the interrupt handling flow in Linux, including top-half and bottom-half processing.
2
Deferred Work: Softirqs, Tasklets, and Workqueues
Compare softirqs, tasklets, and workqueues, and select the appropriate deferred work mechanism for a given scenario.
3
Interrupts & Workqueues: Kernel Module Implementation
Implement a kernel module that registers an interrupt handler and defers work using a workqueue.
4
Interrupt Storms: Diagnosis & Mitigation
Diagnose an interrupt storm scenario, identifying root causes and mitigation strategies.
5
Understanding the Linux Device Model and sysfs
Describe the Linux device model (buses, devices, drivers) and its representation in sysfs.
6
Platform Driver Lifecycle and Basic Implementation
Explain the probe/remove lifecycle of a platform driver and write a basic platform driver.
DMA Mapping: Coherent vs. Streaming
Describe DMA mapping types (coherent vs. streaming) and their implications for cache coherency.
8
DMA Buffer Management with the Kernel API
Use the kernel's DMA API to allocate and map coherent and streaming DMA buffers within a device driver.
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PCIe Subsystem Internals