On Thu, Feb 4, 2021 at 9:59 PM Jason Gunthorpe wrote:
>
> On Thu, Feb 04, 2021 at 09:19:57PM +0100, Daniel Vetter wrote:
> > On Thu, Feb 4, 2021 at 9:09 PM Jason Gunthorpe wrote:
> > >
> > > On Thu, Feb 04, 2021 at 08:59:59PM +0100, Daniel Vetter wrote:
> > >
> > > > So I think just checking for
Am 04.02.21 um 19:38 schrieb Jason Gunthorpe:
On Thu, Feb 04, 2021 at 06:16:27PM +0100, Daniel Vetter wrote:
On Thu, Feb 4, 2021 at 5:13 PM Jason Gunthorpe wrote:
On Wed, Feb 03, 2021 at 10:19:48PM +0100, Daniel Vetter wrote:
tldr; DMA buffers aren't normal memory, expecting that you can use
On Thu, Feb 4, 2021 at 9:09 PM Jason Gunthorpe wrote:
>
> On Thu, Feb 04, 2021 at 08:59:59PM +0100, Daniel Vetter wrote:
>
> > So I think just checking for VM_PFNMAP after the vma is set up should
> > be enough to guarantee we'll only have pte_special ptes in there,
> > ever. But I'm not sure, thi
On Thu, Feb 4, 2021 at 7:38 PM Jason Gunthorpe wrote:
>
> On Thu, Feb 04, 2021 at 06:16:27PM +0100, Daniel Vetter wrote:
> > On Thu, Feb 4, 2021 at 5:13 PM Jason Gunthorpe wrote:
> > > On Wed, Feb 03, 2021 at 10:19:48PM +0100, Daniel Vetter wrote:
> > > > tldr; DMA buffers aren't normal memory, e
On Thu, Feb 4, 2021 at 5:13 PM Jason Gunthorpe wrote:
> On Wed, Feb 03, 2021 at 10:19:48PM +0100, Daniel Vetter wrote:
> > tldr; DMA buffers aren't normal memory, expecting that you can use
> > them like that (like calling get_user_pages works, or that they're
> > accounting like any other normal
tldr; DMA buffers aren't normal memory, expecting that you can use
them like that (like calling get_user_pages works, or that they're
accounting like any other normal memory) cannot be guaranteed.
Since some userspace only runs on integrated devices, where all
buffers are actually all resident sys
