On Sat, 9 Jun 2007, Linus Torvalds wrote:

> On Sat, 9 Jun 2007, Al Viro wrote:
> > 
> > Eww...  Idea of pipe(2) taking flags as argument...
> 
> Right. That was one of the patches, and it was one that I said was too 
> damn ugly to live.
> 
> So I instead suggested the alternate approach of adding a single new 
> system call that runs another system call indirectly, with a set of flags 
> and/or other behaviour modifications.

What if we put a data section in the vdso and we let userspace set the 
flags or whatever in there? Syslets could use one of those bits to set the 
"threadlet mode" w/out calling a syscall at all.
In that way we have no new syscalls whatsoever. No?


- Davide


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