What command would you use to check the memory allocated to kernel slabs?

The command used to check the memory allocated to kernel slabs is "diagnose hardware sysinfo slab." This command is specifically designed to provide detailed information regarding the slab allocator, which is responsible for managing memory allocation for kernel objects in a structured manner. This is particularly useful for understanding how effectively the memory is being utilized and for diagnosing memory-related issues within the system.

The information retrieved from this command helps network administrators and engineers assess the performance and memory allocation efficiency of different kernel objects. Proper memory management is crucial for enhancing the overall system performance and stability, especially in high-load scenarios.

The other options do not provide specific information pertinent to kernel slabs. While some of them relate to system information or memory, they do not focus exclusively on the slab allocator, which is the core requirement of the question. Thus, the correct command stands out as the one that directly addresses the inquiry about kernel slabs.