* Hector Marco-Gisbert <hecma...@upv.es> wrote:
> A bug in Linux ASLR implementation which affects some AMD processors
> has been found. The issue affects to all Linux process even if they
> are not using shared libraries (statically compiled).
It's not a bug, it's a feature: to work around a Bulldozer cache
aliasing performance problem we have to keep bits 12,13,14 equal for
all mappings in the system.
Your patch improves upon that fix: by per-boot randomizing the
constant portion of the randomized range.
Btw., does anyone know how relevant the performance fix is these days?
A simpler improvement would be to remove the workaround altogether and
recover proper randomization of bits 12,13,14.
Thanks,
Ingo
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