Re: [patch 0/2] x86: NMI-safe trap handlers

Mathieu Desnoyers
2010-07-14T17:08:10Z

* Andi Kleen (andi@firstfloor.org) wrote:
> > x86_32 cannot use vmalloc_sync_all() to sychronize the TLBs from every
> > processes because the vmalloc area is mapped in a different address space for
>
> That doesn't make sense. vmalloc_all_sync() should work on 32bit too.
> It just needs to walk all processes and fix up every page table.

Yeah, I've been taken aback when Tejun told me that a few moments ago. I
initially thought that vmalloc_sync_all() synchronized all page mappings of all
processes on x86_32. But apparently that does not seem to be the case. I'm
adding him in CC.

Thanks,

Mathieu

--
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.