> Linux kernel has a system call "clone" which does for threads what "fork"
> does for processes.
? No, it clones things. That's all. It clones processes and provides
finegrained control over the resources (VM, PPID, &c) to share when this
is done.
Threads are not a distinct entity in Linux (and rightly so).
> If you think about it the library is always faster than a system call -
> because you don't have to make a context switch. In windows (IMHO) the
? System calls do not necessarily involve context switches anyway. If
every system call switched process context the system would be slow as
anything due to cache thrashing.
> In windows NT the kernel is called mach (it's a microkernel)
*boggle* It's over 800K. Not very `micro'.
Oh, and it's not Mach.
I've persistently heard this `NT has a microkernel' argument, and it
seems to me it's tosh. NT is heavily internally layered, sure, but
layering != microkernel.
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