On Tue, 14 Nov 2017, Kirill A. Shutemov wrote:
> On Mon, Nov 13, 2017 at 10:14:36PM +0100, Thomas Gleixner wrote:
> > I can see where you are heading to. Now the case I was looking at is:
> >
> > arch_get_unmapped_area_topdown()
> >
> > addr0 = addr;
> >
> >
> > if (addr) {
On Tue, 14 Nov 2017, Kirill A. Shutemov wrote:
> On Mon, Nov 13, 2017 at 10:14:36PM +0100, Thomas Gleixner wrote:
> > I can see where you are heading to. Now the case I was looking at is:
> >
> > arch_get_unmapped_area_topdown()
> >
> > addr0 = addr;
> >
> >
> > if (addr) {
On Mon, Nov 13, 2017 at 10:17:30PM +0100, Thomas Gleixner wrote:
> On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
> > On Mon, Nov 13, 2017 at 05:57:03PM +0100, Thomas Gleixner wrote:
> > > On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
> > >
> > > > On Mon, Nov 13, 2017 at 04:43:26PM +0100,
On Mon, Nov 13, 2017 at 10:17:30PM +0100, Thomas Gleixner wrote:
> On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
> > On Mon, Nov 13, 2017 at 05:57:03PM +0100, Thomas Gleixner wrote:
> > > On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
> > >
> > > > On Mon, Nov 13, 2017 at 04:43:26PM +0100,
On Mon, Nov 13, 2017 at 10:14:36PM +0100, Thomas Gleixner wrote:
> On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
> > On Mon, Nov 13, 2017 at 08:14:54PM +0100, Thomas Gleixner wrote:
> > > > > It will succeed with 5-level paging.
> > > >
> > > > And why is this allowed?
> > > >
> > > > > It
On Mon, Nov 13, 2017 at 10:14:36PM +0100, Thomas Gleixner wrote:
> On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
> > On Mon, Nov 13, 2017 at 08:14:54PM +0100, Thomas Gleixner wrote:
> > > > > It will succeed with 5-level paging.
> > > >
> > > > And why is this allowed?
> > > >
> > > > > It
On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
> On Mon, Nov 13, 2017 at 05:57:03PM +0100, Thomas Gleixner wrote:
> > On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
> >
> > > On Mon, Nov 13, 2017 at 04:43:26PM +0100, Thomas Gleixner wrote:
> > > > On Tue, 7 Nov 2017, Kirill A. Shutemov wrote:
> >
On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
> On Mon, Nov 13, 2017 at 05:57:03PM +0100, Thomas Gleixner wrote:
> > On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
> >
> > > On Mon, Nov 13, 2017 at 04:43:26PM +0100, Thomas Gleixner wrote:
> > > > On Tue, 7 Nov 2017, Kirill A. Shutemov wrote:
> >
On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
> On Mon, Nov 13, 2017 at 08:14:54PM +0100, Thomas Gleixner wrote:
> > > > It will succeed with 5-level paging.
> > >
> > > And why is this allowed?
> > >
> > > > It should be safe as with 4-level paging such request would fail and
> > > > it's
> >
On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
> On Mon, Nov 13, 2017 at 08:14:54PM +0100, Thomas Gleixner wrote:
> > > > It will succeed with 5-level paging.
> > >
> > > And why is this allowed?
> > >
> > > > It should be safe as with 4-level paging such request would fail and
> > > > it's
> >
On Mon, Nov 13, 2017 at 08:14:54PM +0100, Thomas Gleixner wrote:
> On Mon, 13 Nov 2017, Thomas Gleixner wrote:
> > On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
> >
> > > On Mon, Nov 13, 2017 at 04:43:26PM +0100, Thomas Gleixner wrote:
> > > > On Tue, 7 Nov 2017, Kirill A. Shutemov wrote:
> > >
On Mon, Nov 13, 2017 at 08:14:54PM +0100, Thomas Gleixner wrote:
> On Mon, 13 Nov 2017, Thomas Gleixner wrote:
> > On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
> >
> > > On Mon, Nov 13, 2017 at 04:43:26PM +0100, Thomas Gleixner wrote:
> > > > On Tue, 7 Nov 2017, Kirill A. Shutemov wrote:
> > >
On Mon, Nov 13, 2017 at 05:57:03PM +0100, Thomas Gleixner wrote:
> On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
>
> > On Mon, Nov 13, 2017 at 04:43:26PM +0100, Thomas Gleixner wrote:
> > > On Tue, 7 Nov 2017, Kirill A. Shutemov wrote:
> > >
> > > > In case of 5-level paging, we don't put any
On Mon, Nov 13, 2017 at 05:57:03PM +0100, Thomas Gleixner wrote:
> On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
>
> > On Mon, Nov 13, 2017 at 04:43:26PM +0100, Thomas Gleixner wrote:
> > > On Tue, 7 Nov 2017, Kirill A. Shutemov wrote:
> > >
> > > > In case of 5-level paging, we don't put any
On Mon, 13 Nov 2017, Thomas Gleixner wrote:
> On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
>
> > On Mon, Nov 13, 2017 at 04:43:26PM +0100, Thomas Gleixner wrote:
> > > On Tue, 7 Nov 2017, Kirill A. Shutemov wrote:
> > >
> > > > In case of 5-level paging, we don't put any mapping above 47-bit,
On Mon, 13 Nov 2017, Thomas Gleixner wrote:
> On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
>
> > On Mon, Nov 13, 2017 at 04:43:26PM +0100, Thomas Gleixner wrote:
> > > On Tue, 7 Nov 2017, Kirill A. Shutemov wrote:
> > >
> > > > In case of 5-level paging, we don't put any mapping above 47-bit,
On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
> On Mon, Nov 13, 2017 at 04:43:26PM +0100, Thomas Gleixner wrote:
> > On Tue, 7 Nov 2017, Kirill A. Shutemov wrote:
> >
> > > In case of 5-level paging, we don't put any mapping above 47-bit, unless
> > > userspace explicitly asked for it.
> > >
>
On Mon, 13 Nov 2017, Kirill A. Shutemov wrote:
> On Mon, Nov 13, 2017 at 04:43:26PM +0100, Thomas Gleixner wrote:
> > On Tue, 7 Nov 2017, Kirill A. Shutemov wrote:
> >
> > > In case of 5-level paging, we don't put any mapping above 47-bit, unless
> > > userspace explicitly asked for it.
> > >
>
On Mon, Nov 13, 2017 at 04:43:26PM +0100, Thomas Gleixner wrote:
> On Tue, 7 Nov 2017, Kirill A. Shutemov wrote:
>
> > In case of 5-level paging, we don't put any mapping above 47-bit, unless
> > userspace explicitly asked for it.
> >
> > Userspace can ask for allocation from full address space
On Mon, Nov 13, 2017 at 04:43:26PM +0100, Thomas Gleixner wrote:
> On Tue, 7 Nov 2017, Kirill A. Shutemov wrote:
>
> > In case of 5-level paging, we don't put any mapping above 47-bit, unless
> > userspace explicitly asked for it.
> >
> > Userspace can ask for allocation from full address space
On Tue, 7 Nov 2017, Kirill A. Shutemov wrote:
> In case of 5-level paging, we don't put any mapping above 47-bit, unless
> userspace explicitly asked for it.
>
> Userspace can ask for allocation from full address space by specifying
> hint address above 47-bit.
>
> Nicholas noticed that current
On Tue, 7 Nov 2017, Kirill A. Shutemov wrote:
> In case of 5-level paging, we don't put any mapping above 47-bit, unless
> userspace explicitly asked for it.
>
> Userspace can ask for allocation from full address space by specifying
> hint address above 47-bit.
>
> Nicholas noticed that current
In case of 5-level paging, we don't put any mapping above 47-bit, unless
userspace explicitly asked for it.
Userspace can ask for allocation from full address space by specifying
hint address above 47-bit.
Nicholas noticed that current implementation violates this interface:
we can get vma
In case of 5-level paging, we don't put any mapping above 47-bit, unless
userspace explicitly asked for it.
Userspace can ask for allocation from full address space by specifying
hint address above 47-bit.
Nicholas noticed that current implementation violates this interface:
we can get vma
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