On Tue, May 22, 2018 at 04:46:05PM +0000, Christopher Lameter wrote: > On Tue, 22 May 2018, Dave Hansen wrote: > > > On 05/22/2018 09:05 AM, Boaz Harrosh wrote: > > > How can we implement "Private memory"? > > > > Per-cpu page tables would do it. > > We already have that for percpu subsystem. See alloc_percpu()
x86 doesn't have per-cpu page tables. And the last time I looked, percpu also didn't, it played games with staggered ranges in the vmalloc space and used the [FG]S segment offset to make it work. Doing proper per-cpu pagetables on x86 is possible, but quite involved and expensive.
