On Thu, Aug 22, 2019 at 4:24 PM Jason Gunthorpe wrote:
>
> On Thu, Aug 22, 2019 at 10:42:39AM +0200, Daniel Vetter wrote:
>
> > > RDMA has a mutex:
> > >
> > > ib_umem_notifier_invalidate_range_end
> > > rbt_ib_umem_for_each_in_range
> > >invalidate_range_start_trampoline
> > >
On Thu, Aug 22, 2019 at 10:16 AM Jason Gunthorpe wrote:
>
> On Wed, Aug 21, 2019 at 05:41:51PM +0200, Daniel Vetter wrote:
>
> > > Hm, I thought the page table locks we're holding there already prevent any
> > > sleeping, so would be redundant? But reading through code I think that's
> > > not
On Wed, Aug 21, 2019 at 05:41:51PM +0200, Daniel Vetter wrote:
> > Hm, I thought the page table locks we're holding there already prevent any
> > sleeping, so would be redundant? But reading through code I think that's
> > not guaranteed, so yeah makes sense to add it for invalidate_range_end
> >
On Tue, Aug 20, 2019 at 10:19:02AM +0200, Daniel Vetter wrote:
> We need to make sure implementations don't cheat and don't have a
> possible schedule/blocking point deeply burried where review can't
> catch it.
>
> I'm not sure whether this is the best way to make sure all the
> might_sleep()
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