[TUHS] If forking is bad, how about buffering?

[Bakul Shah via TUHS]

On May 18, 2024, at 6:21 PM, Larry McVoy <lm at mcvoy.com> wrote:
> 
> On Sat, May 18, 2024 at 06:04:23PM -0700, Bakul Shah via TUHS wrote:
>> [1] This brings up a separate point: in a microkernel even a simple
>> thing like "foo | bar" would require a third process - a "pipe
>> service", to buffer up the output of foo! You may have reduced
>> the overhead of individual syscalls but you will have more of
>> cross-domain calls!
> 
> Do any micro kernels do address space to address space bcopy()?

mmapping the same page in two processes won't be hard but now
you have complicated cat (or some iolib)!