芯片园地 (@BigIotWorld1)
@BigIotWorld1
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虚拟内存真正如何工作（2）：Page Fault、Swap、共享内存与 Copy-on-Write 一次讲透
CPU 到底怎么执行一条指令？
12分钟看懂 Fetch、Decode、Execute 全过程. 从程序计数器一路讲到取指、译码、寄存器、ALU、内存和写回。
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@insidecomput This design dramatically simplifies software development.
Developers don't need completely different APIs for every type of resource.
The filesystem becomes a universal interface.
Most people think Linux is complicated.
But the core idea is simple:
Applications should not directly control hardware.
Instead, Linux uses a layered architecture:
Applications
→ System Calls
→ Kernel
→ Drivers
→ Hardware
When an application needs something, it asks the kernel through a system call.
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