On Thu, 3 Apr 2008, Andrea Arcangeli wrote:
> Why can't it fire on the mm_struct where GRU just registered? That
> mm_struct existed way before GRU registered, and VM is free to unmap
> it w/o mmap_sem if there was any memory pressure.
Right. Hmmm... Bad situation. We would have invalidate_start
On Wed, Apr 02, 2008 at 03:06:19PM -0700, Christoph Lameter wrote:
> On Thu, 3 Apr 2008, Andrea Arcangeli wrote:
>
> > That would work for #v10 if I remove the invalidate_range_start from
> > try_to_unmap_cluster, it can't work for EMM because you've
> > emm_invalidate_start firing anywhere outsid
On Thu, 3 Apr 2008, Andrea Arcangeli wrote:
> That would work for #v10 if I remove the invalidate_range_start from
> try_to_unmap_cluster, it can't work for EMM because you've
> emm_invalidate_start firing anywhere outside the context of the
> current task (even regular rmap code, not just nonline
On Wed, Apr 02, 2008 at 02:05:28PM -0700, Christoph Lameter wrote:
> Here is a patch to require single threaded execution during emm_register.
> This also allows an easy implementation of an unregister function and gets
> rid of the races that Andrea worried about.
That would work for #v10 if I r
