On Wed, 31 Mar 2021 16:49:27 +0200 Michal Hocko wrote:
> > Thanks for the clarification! I have suspected this to be the case but
> > I am not really familiar with the interface to have any strong statement
> > here. Maybe we want to document this explicitly.
>
> Btw. Andrew the patch still
On Mon 22-03-21 14:49:35, Michal Hocko wrote:
> On Mon 22-03-21 15:00:37, Mike Rapoport wrote:
> > On Mon, Mar 22, 2021 at 11:14:37AM +0100, Michal Hocko wrote:
> > > Le'ts Andrea and Mike
> > >
> > > On Fri 19-03-21 22:24:28, Bui Quang Minh wrote:
> > > > userfaultfd_writeprotect() use
On Tue, Mar 23, 2021 at 09:48:03AM +0700, Bui Quang Minh wrote:
> On Mon, Mar 22, 2021 at 03:00:37PM +0200, Mike Rapoport wrote:
> > On Mon, Mar 22, 2021 at 11:14:37AM +0100, Michal Hocko wrote:
> > > Le'ts Andrea and Mike
> > >
> > > On Fri 19-03-21 22:24:28, Bui Quang Minh wrote:
> > > >
On Mon, Mar 22, 2021 at 03:00:37PM +0200, Mike Rapoport wrote:
> On Mon, Mar 22, 2021 at 11:14:37AM +0100, Michal Hocko wrote:
> > Le'ts Andrea and Mike
> >
> > On Fri 19-03-21 22:24:28, Bui Quang Minh wrote:
> > > userfaultfd_writeprotect() use change_protection() to clear write bit in
> > >
On Mon 22-03-21 15:00:37, Mike Rapoport wrote:
> On Mon, Mar 22, 2021 at 11:14:37AM +0100, Michal Hocko wrote:
> > Le'ts Andrea and Mike
> >
> > On Fri 19-03-21 22:24:28, Bui Quang Minh wrote:
> > > userfaultfd_writeprotect() use change_protection() to clear write bit in
> > > page table entries
On Mon, Mar 22, 2021 at 03:00:37PM +0200, Mike Rapoport wrote:
> On Mon, Mar 22, 2021 at 11:14:37AM +0100, Michal Hocko wrote:
> > Le'ts Andrea and Mike
> >
> > On Fri 19-03-21 22:24:28, Bui Quang Minh wrote:
> > > userfaultfd_writeprotect() use change_protection() to clear write bit in
> > >
On Mon, Mar 22, 2021 at 11:14:37AM +0100, Michal Hocko wrote:
> Le'ts Andrea and Mike
>
> On Fri 19-03-21 22:24:28, Bui Quang Minh wrote:
> > userfaultfd_writeprotect() use change_protection() to clear write bit in
> > page table entries (pte/pmd). So, later write to this virtual address
> >
+Peter
On Mon, Mar 22, 2021 at 11:14:37AM +0100, Michal Hocko wrote:
> Le'ts Andrea and Mike
>
> On Fri 19-03-21 22:24:28, Bui Quang Minh wrote:
> > userfaultfd_writeprotect() use change_protection() to clear write bit in
> > page table entries (pte/pmd). So, later write to this virtual address
Le'ts Andrea and Mike
On Fri 19-03-21 22:24:28, Bui Quang Minh wrote:
> userfaultfd_writeprotect() use change_protection() to clear write bit in
> page table entries (pte/pmd). So, later write to this virtual address
> range causes a page fault, which is then handled by userspace program.
>
On Fri, 19 Mar 2021 22:24:28 +0700 Bui Quang Minh
wrote:
> userfaultfd_writeprotect() use change_protection() to clear write bit in
> page table entries (pte/pmd). So, later write to this virtual address
> range causes a page fault, which is then handled by userspace program.
> However,
userfaultfd_writeprotect() use change_protection() to clear write bit in
page table entries (pte/pmd). So, later write to this virtual address
range causes a page fault, which is then handled by userspace program.
However, change_protection() has no effect when there is no page table
entries
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