On Mon, Feb 25, 2019 at 03:13:36PM +0800, Peter Xu wrote:
> On Fri, Feb 22, 2019 at 10:35:09AM -0500, Jerome Glisse wrote:
> > On Fri, Feb 22, 2019 at 04:46:03PM +0800, Peter Xu wrote:
> > > On Thu, Feb 21, 2019 at 01:04:24PM -0500, Jerome Glisse wrote:
> > > > On Tue, Feb 12, 2019 at 10:56:20AM +0
On Fri, Feb 22, 2019 at 10:35:09AM -0500, Jerome Glisse wrote:
> On Fri, Feb 22, 2019 at 04:46:03PM +0800, Peter Xu wrote:
> > On Thu, Feb 21, 2019 at 01:04:24PM -0500, Jerome Glisse wrote:
> > > On Tue, Feb 12, 2019 at 10:56:20AM +0800, Peter Xu wrote:
> > > > This allows uffd-wp to support write-
On Fri, Feb 22, 2019 at 04:46:03PM +0800, Peter Xu wrote:
> On Thu, Feb 21, 2019 at 01:04:24PM -0500, Jerome Glisse wrote:
> > On Tue, Feb 12, 2019 at 10:56:20AM +0800, Peter Xu wrote:
> > > This allows uffd-wp to support write-protected pages for COW.
[...]
> > > diff --git a/mm/mprotect.c b/mm/
On Thu, Feb 21, 2019 at 01:04:24PM -0500, Jerome Glisse wrote:
> On Tue, Feb 12, 2019 at 10:56:20AM +0800, Peter Xu wrote:
> > This allows uffd-wp to support write-protected pages for COW.
> >
> > For example, the uffd write-protected PTE could also be write-protected
> > by other usages like COW
On Tue, Feb 12, 2019 at 10:56:20AM +0800, Peter Xu wrote:
> This allows uffd-wp to support write-protected pages for COW.
>
> For example, the uffd write-protected PTE could also be write-protected
> by other usages like COW or zero pages. When that happens, we can't
> simply set the write bit in
This allows uffd-wp to support write-protected pages for COW.
For example, the uffd write-protected PTE could also be write-protected
by other usages like COW or zero pages. When that happens, we can't
simply set the write bit in the PTE since otherwise it'll change the
content of every single re
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