Re: [PATCH 5/8] x86/arch_prctl/64: Remove FSBASE/GSBASE < 4G optimization

From: Andi Kleen
Date: Tue Apr 26 2016 - 16:50:36 EST


On Tue, Apr 26, 2016 at 12:23:28PM -0700, Andy Lutomirski wrote:
> As far as I know, the optimization doesn't work on any modern distro
> because modern distros use high addresses for ASLR. Remove it.

I disagree with this patch. For example it will be a regression
for static executables. And randomly making old systems slower is a bad
idea.

-Andi