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SubjectRe: [RFC,PATCH 2/2] Documentation: prctl/seccomp_filter
On Thu, Jan 12, 2012 at 7:13 AM, Łukasz Sowa <> wrote:
> Hi Will,
> That's very different approach to the system call interposition problem.
> I find you solution very interesting. It gives far more capabilities
> than my syscalls cgroup that you commented on some time ago. It's ready
> now but I haven't tried filtering yet. I think that if your solution
> make it to the mainline (and I guess that's really possible at current
> stage :)), there will be no place for mine solution but that's ok.

Yeah - there've been so many tries, I'll be happy when one makes it in
which is usable :)

> There's one thing that I'm curious about - have you measured overhead in
> any way? That was one of the biggest issues in all previous attempts to
> limit syscalls. I'd love to compare the numbers with mine solution.

Certainly. I have some rough numbers, but nothing I'd call strong
measurements. There is still a fair amount of cost due to the syscall
slow path.

> I'll examine your patch later on and put some comments if I bump into
> something.

Much appreciated - cheers!
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