X86-64 vsyscall is removed from Linux kernel 3.1.

[Ulrich Drepper]

On Wed, Aug 24, 2011 at 10:53, H.J. Lu <hjl.tools@gmail.com> wrote:
> X86-64 vsyscall has been removed from Linux kernel 3.1 and
> has been emulated with syscall instruction.  So for kernel 3.1
> and above, vsyscall is slower than direct syscall instruction.
> I think glibc should try vdso first and fall back to direct syscall
> instruction.

That's already done.  Where do you think there is a problem?