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<p>run entirely in a single <a href="page.php?w=address_space">address space</a> with the CPU executing in <a href="page.php?w=Protection_ring">supervisor mode</a>, mainly for speed. <a href="page.php?w=Microkernel">Microkernel</a>s run most but not all of their services in user space, like user processes do, mainly for resilience and <a href="page.php?w=Modular_programming">modularity</a>. <a href="page.php?w=MINIX_3">MINIX 3</a> is a notable example of microkernel design. Some kernels, such as the <a href="page.php?w=Linux_kernel">Linux kernel</a>,</p><p>
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