All this color nonsense is written by people who have no idea about their problems with blocking IO.
It's about blocking vs non-blocking, and many of those write about their problems when they cannot leave the blocking hell. Or even their presumed non-blocking hell, as seen with node/javascript folks.
Well, you won't get secure multitasking if you allow blocking. You won't get fast multitasking neither if you allow blocking. The whole POSIX API is doomed. "Red" and "blue" are of course a bad thing. 90% of the time the kernel is waiting for some blocking IO, and keeps switching around, with all its context switches. With pure event driven non-blocking IO you don't wait in the kernel, you wait at the user code, who can decide to do something else useful in that time. And the user decides that he will need better tools to do more useful things in parallel.
There are tons of success stories of pure non-blocking IO. Once the happy manager puts blocking in, on peer pressure, posix layers and red-blue advocates the system goes down, and you are in deadlock hell, slowness and insecure concurrency.
It's about blocking vs non-blocking, and many of those write about their problems when they cannot leave the blocking hell. Or even their presumed non-blocking hell, as seen with node/javascript folks.
Well, you won't get secure multitasking if you allow blocking. You won't get fast multitasking neither if you allow blocking. The whole POSIX API is doomed. "Red" and "blue" are of course a bad thing. 90% of the time the kernel is waiting for some blocking IO, and keeps switching around, with all its context switches. With pure event driven non-blocking IO you don't wait in the kernel, you wait at the user code, who can decide to do something else useful in that time. And the user decides that he will need better tools to do more useful things in parallel.
There are tons of success stories of pure non-blocking IO. Once the happy manager puts blocking in, on peer pressure, posix layers and red-blue advocates the system goes down, and you are in deadlock hell, slowness and insecure concurrency.