Hi, On Wed, Nov 4, 2009 at 12:58 AM, Theo de Raadt <dera...@cvs.openbsd.org>wrote:
> 2) At least three of our developers were aware of this exploitation > method going back perhaps two years before than the commit, but we > gnashed our teeth a lot to try to find other solutions. Clever > cpu architectures don't have this issue because the virtual address > spaces are seperate, so i386/amd64 are the ones with the big impact. > We did think long and hard about tlb bashing page 0 everytime we > switch into the kernel, but it still does not look attractive from > a performance standpoint. > I'm confused. That came out a bit weird: are you saying you knew about the bug for 2 years but did not fix it? c.b-
