Re: [patch 13/21] Xen-paravirt: Add nosegneg capability to the vsyscall page notes

Jeremy Fitzhardinge
2007-02-13T22:49:14Z

Zachary Amsden wrote:
> I don't like this because now a kernel compiled with both CONFIG_XEN
> and CONFIG_VMI has "nosegneg" turned on. We don't actually require
> this for performance or correctness, so it would be nice to be able to
> dynamically turn it off instead of having it forced.

Any suggestions about how to do this? It seems hard to have a note
dynamically appear and disappear in the vsyscall.so.

I wasn't terribly concerned about this, since there is effectively zero
performance difference between the two library implementations.

J