4 Jan
2018
4 Jan
'18
9:27 p.m.
On Thu, Jan 04, 2018 at 02:56:46PM -0500, Paul Davis wrote:
is this correct? my impression is that KPTI makes
user->kernel and
kernel->user switches more expensive tha they used to be, but does not
change the cost of a context switch that stays in the same ring mode.
so, basically, system calls cost more; context switches stay at about the
same cost.
That is what I understood as well. Maybe this will affect systems
using very small period sizes, we'll see.
Ciao,
--
FA
A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)