4 ms·
> How will your "userland core" switch to other userland programs safely? A pointer-dereference can be a MMap'd file, so its actually I/O. User PU would stall
by anticensor 7y ago
> How will your "userland core" switch to other userland programs safely? A pointer-dereference can be a MMap'd file, so its actually I/O.
User PU would stall on the "outermost" return and wait for another dispatch by kernel PU; it would also stall during context switches.