On Wed, Dec 28, 2005 at 02:13:45PM -0800, Ulrich Drepper wrote:
> > This adds configurable sysenter support on x86. This saves about 5k on
> > small systems.
>
> You not only remove the sysenter support but also the vdso. And the
> later is a very bad idea. It is already today basically impossible to
> have reliable backtraces without the vdso and the unwind info it
> contains for signal handlers. And things can only get worse in future.
> The magic heuristics in the compiler are not reliable. It's simply the
> wrong face, this in a interface between the kernel and the libc, the
> compiler should not have such knowledge.
>
> The vdso should be mandatory for all configurations.
It's under CONFIG_EMBEDDED. Think uclibc. Think systems without
interactive shells.
--
Mathematics is the supreme nostalgia of our time.
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