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
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
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
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
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
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
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
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
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 documentation to vm_normal_page() suggests
that ptes
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