https://www.emblogic.com/forum/categories/005-07%3A-the-chaos-and-control%3A-concurrency-and-synchronization-in-linux-drivers/feed.rss Thu, 13 Aug 26 20:18:47 +0530 005.08: The Chaos and Control: Concurrency and Synchronization in Linux Drivers - EmbLogic en-CA https://www.emblogic.com/forum/discussion/2224/iq005-08-009-choosing-a-mutex-over-a-spinlock-be-a-catastrophic-design-flaw-in-a-device-driver Sun, 31 May 2026 08:48:25 +0530 pravjot 2224@/forum/discussions Interview Question: Under what specific circumstances would choosing a Mutex over a Spinlock be a catastrophic design flaw in a device driver?]]> https://www.emblogic.com/forum/discussion/2223/iq005-08-008-when-analyzing-a-kernel-panic-log-an-oops-which-specific-registers-and-stack-trace Sun, 31 May 2026 08:42:51 +0530 pravjot 2223@/forum/discussions Interview Question: When analyzing a Kernel Panic log (an oops), which specific registers and stack trace indicators do you look at first to determine if a race condition caused the crash?]]> https://www.emblogic.com/forum/discussion/2222/iq005-08-007-how-would-implementing-an-atomic-integer-for-the-buffer_length-change-the-outcome Sun, 31 May 2026 08:14:46 +0530 pravjot 2222@/forum/discussions Interview Question: In the buffer collision scenario described, how would implementing an atomic integer for the `buffer_length` change the outcome, and would it completely fix the bug?]]> https://www.emblogic.com/forum/discussion/2221/iq005-08-006-can-you-walk-me-through-a-debugging-strategy-you-would-use-to-identify-a-race-cond- Sat, 30 May 2026 20:02:27 +0530 pravjot 2221@/forum/discussions Interview Question: Can you walk me through a debugging strategy you would use to identify a race condition that only causes a crash once every few weeks?]]> https://www.emblogic.com/forum/discussion/2220/iq005-08-005-what-are-the-strict-limitations-on-the-types-of-functions-e-g-sleeping-functions Sat, 30 May 2026 19:56:51 +0530 pravjot 2220@/forum/discussions Interview Question: What are the strict limitations on the types of functions (e.g., sleeping functions, heavy computations) you can call from within a hardware interrupt handler?]]> https://www.emblogic.com/forum/discussion/2219/iq005-08-004-if-your-driver-is-executing-code-that-holds-a-spinlock-what-happens-if-the-kernel-at Sat, 30 May 2026 19:52:09 +0530 pravjot 2219@/forum/discussions Interview Question: If your driver is executing code that holds a spinlock, what happens if the kernel attempts to preempt that specific thread?]]> https://www.emblogic.com/forum/discussion/2218/iq-005-08-003-when-designing-a-driver-for-an-smp-system-how-do-you-determine-which-data-structure Sat, 30 May 2026 19:45:10 +0530 pravjot 2218@/forum/discussions Interview Question: When designing a driver for an SMP system, how do you determine which data structures require per-CPU allocation versus globally shared allocation?]]> https://www.emblogic.com/forum/discussion/2217/iq-005-08-002-describe-a-scenario-where-an-illusion-of-concurrency-time-slicing-might-hide-a-bug Sat, 30 May 2026 19:35:47 +0530 pravjot 2217@/forum/discussions Interview Question: Describe a scenario where an illusion of concurrency (time-slicing) might hide a bug that true hardware concurrency would immediately expose.]]> https://www.emblogic.com/forum/discussion/2216/iq-005-08-001-explain-the-difference-in-how-the-os-handles-an-invalid-memory-pointer-dereference Sat, 30 May 2026 19:31:32 +0530 pravjot 2216@/forum/discussions Interview Question: Can you explain the difference in how the OS handles an invalid memory pointer dereference in a user-space application versus inside a kernel device driver?]]> https://www.emblogic.com/forum/discussion/2134/005-07-the-chaos-and-control-concurrency-and-synchronization-in-linux-drivers Fri, 01 May 2026 14:06:41 +0530 pravjot 2134@/forum/discussions You are invited to put in all queries/resolutions/advice/articles/discussion related to

005.07: The Chaos and Control: Concurrency and Synchronization in Linux Drivers 

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