On Sun, May 29, 2011 at 9:22 AM, Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> Or, in fact, we could just do something like the attached (UNTESTED!)

So I did warn you that it was untested.

It still is, but I walked through it a bit more, and I realized that
while I had gotten rid of the extra allocations of the
cpu_vm_mask_var, I hadn't gotten rid of the freeing.

So that patch would definitely not have worked very well with
CONFIG_CPUMASK_OFFSTACK.

And I noticed that I moved the cpu_vm_mask back in the wrong space, it
should likely be as close as possible to the mm_context_t, since the
main user is likely the task switching code that touches that anyway.

So here's a slightly updated patch.

STILL TOTALLY UNTESTED! The fixes were just from eyeballing it a bit
more, not from any actual testing.

                      Linus