Ubuntu difference in the cross-compile the kernel compiled and shared folders

Kernel in Ubuntu inside cross-compiler environment is actually equivalent to the Raspberry Pi board or other inside compiled, the actual operating environment and the board is the same;

But through a shared folder or extract the kernel compilation, in fact, the environment or windows environment, there will be some sensitive issues, and compile and decompression speed is very slow;

Or I suggest that you make the appropriate kernel compilation and decompression in ubuntu inside.