On Fri 06-12-19 14:16:10, Thomas Hellstrom wrote:
> Hi Michal,
>
> On Fri, 2019-12-06 at 11:30 +0100, Michal Hocko wrote:
> > On Fri 06-12-19 09:24:26, Thomas Hellström (VMware) wrote:
> > [...]
> > > @@ -283,11 +282,26 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct
> > > vm_fault *vmf,
> > >
Hi Michal,
On Fri, 2019-12-06 at 11:30 +0100, Michal Hocko wrote:
> On Fri 06-12-19 09:24:26, Thomas Hellström (VMware) wrote:
> [...]
> > @@ -283,11 +282,26 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct
> > vm_fault *vmf,
> > pfn = page_to_pfn(page);
> > }
> >
>
On Fri 06-12-19 09:24:26, Thomas Hellström (VMware) wrote:
[...]
> @@ -283,11 +282,26 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault
> *vmf,
> pfn = page_to_pfn(page);
> }
>
> + /*
> + * Note that the value of @prot at this
From: Thomas Hellstrom
TTM graphics buffer objects may, transparently to user-space, move
between IO and system memory. When that happens, all PTEs pointing to the
old location are zapped before the move and then faulted in again if
needed. When that happens, the page protection caching mode-
