On Tue, Mar 23, 2021 at 04:46:00PM +0100, Thomas Hellström (Intel) wrote:
> > > +static inline bool is_cow_mapping(vm_flags_t flags)
> > > +{
> > > + return (flags & (VM_SHARED | VM_MAYWRITE)) == VM_MAYWRITE;
> > > +}
> > Most driver places are just banning VM_SHARED.
> >
> > I see you copied this
On 3/23/21 3:04 PM, Jason Gunthorpe wrote:
On Tue, Mar 23, 2021 at 12:47:24PM +0100, Daniel Vetter wrote:
+static inline bool is_cow_mapping(vm_flags_t flags)
Bit a bikeshed, but I wonder whether the public interface shouldn't be
vma_is_cow_mapping. Or whether this shouldn't be rejected some
On 3/23/21 3:00 PM, Jason Gunthorpe wrote:
On Sun, Mar 21, 2021 at 07:45:29PM +0100, Thomas Hellström (Intel) wrote:
To block fast gup we need to make sure TTM ptes are always special.
With MIXEDMAP we, on architectures that don't support pte_special,
insert normal ptes, but OTOH on those archi
On Tue, Mar 23, 2021 at 12:47:24PM +0100, Daniel Vetter wrote:
> > +static inline bool is_cow_mapping(vm_flags_t flags)
>
> Bit a bikeshed, but I wonder whether the public interface shouldn't be
> vma_is_cow_mapping. Or whether this shouldn't be rejected somewhere else,
> since at least in driver
On Sun, Mar 21, 2021 at 07:45:29PM +0100, Thomas Hellström (Intel) wrote:
> To block fast gup we need to make sure TTM ptes are always special.
> With MIXEDMAP we, on architectures that don't support pte_special,
> insert normal ptes, but OTOH on those architectures, fast is not
> supported.
> At t
Am 22.03.21 um 09:13 schrieb Thomas Hellström (Intel):
Hi!
On 3/22/21 8:47 AM, Christian König wrote:
Am 21.03.21 um 19:45 schrieb Thomas Hellström (Intel):
To block fast gup we need to make sure TTM ptes are always special.
With MIXEDMAP we, on architectures that don't support pte_special,
On Sun, Mar 21, 2021 at 07:45:29PM +0100, Thomas Hellström (Intel) wrote:
> To block fast gup we need to make sure TTM ptes are always special.
> With MIXEDMAP we, on architectures that don't support pte_special,
> insert normal ptes, but OTOH on those architectures, fast is not
> supported.
> At t
Hi!
On 3/22/21 8:47 AM, Christian König wrote:
Am 21.03.21 um 19:45 schrieb Thomas Hellström (Intel):
To block fast gup we need to make sure TTM ptes are always special.
With MIXEDMAP we, on architectures that don't support pte_special,
insert normal ptes, but OTOH on those architectures, fast
Am 21.03.21 um 19:45 schrieb Thomas Hellström (Intel):
To block fast gup we need to make sure TTM ptes are always special.
With MIXEDMAP we, on architectures that don't support pte_special,
insert normal ptes, but OTOH on those architectures, fast is not
supported.
At the same time, the function
