On 10/22/2015 03:25 PM, Jerome Glisse wrote:
> On Thu, Oct 22, 2015 at 02:23:08PM -0700, Dave Hansen wrote:
...
>> Can you give an example of where a process might be doing a gup and it
>> is completely separate from the CPU context that it's being executed under?
>
> In drivers/iommu/amd_iommu_v2
On Thu, Oct 22, 2015 at 02:23:08PM -0700, Dave Hansen wrote:
> On 10/22/2015 01:57 PM, Jerome Glisse wrote:
> > I have not read all the patches, but here i assume that for GUP you do
> > not first call arch_vma_access_permitted(). So issue i see is that GUP
> > for a process might happen inside ano
On 10/22/2015 01:57 PM, Jerome Glisse wrote:
> I have not read all the patches, but here i assume that for GUP you do
> not first call arch_vma_access_permitted(). So issue i see is that GUP
> for a process might happen inside another process and that process might
> have different pkru protection
On Mon, Sep 28, 2015 at 12:18:23PM -0700, Dave Hansen wrote:
>
> From: Dave Hansen
>
> Today, for normal faults and page table walks, we check the VMA
> and/or PTE to ensure that it is compatible with the action. For
> instance, if we get a write fault on a non-writeable VMA, we
> SIGSEGV.
>
>
From: Dave Hansen
Today, for normal faults and page table walks, we check the VMA
and/or PTE to ensure that it is compatible with the action. For
instance, if we get a write fault on a non-writeable VMA, we
SIGSEGV.
We try to do the same thing for protection keys. Basically, we
try to make su
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