On Thu, Dec 11, 2008 at 7:03 PM, Zdenek Kotala <Zdenek.Kotala@sun.com> wrote:
>
> Yes, because it is not simple write operation. You need to read byte from
> memory to register, set bit and write it back. Write memory itself is atomic
> but somebody could change other bits between read and write.
>
Yeah, but since its just a hint, we can possibly live with some corner
cases. The benefit of avoiding contention on the VM page would easily
out weigh the downside of wrong hints.
Thanks,
Pavan
--
Pavan Deolasee
EnterpriseDB http://www.enterprisedb.com
