Re: [RFC PATCH] mm: only set fault addrsss' access bit in do_anonymous_page

[David Hildenbrand (Arm)]

On 2/13/26 15:52, Wenchao Hao wrote:
> On Fri, Feb 13, 2026 at 5:08 PM David Hildenbrand (Arm)
> <david@xxxxxxxxxx> wrote:
> > On 2/13/26 10:02, Wenchao Hao wrote:
> > > On Thu, Feb 12, 2026 at 4:54 PM David Hildenbrand (Arm)
> > > <david@xxxxxxxxxx> wrote:
> > >
> > > Apologies for the delayed reply – I was just writing a demo to verify the
> > > approach you mentioned.
> > >
> > > Using the CONFIG_DEBUG_KERNEL compile-time macro to isolate this feature
> > > is indeed an excellent idea.
> > >
> > > However, in engineering practice, it requires recompiling and
> > > replacing the kernel,
> > > which can be cumbersome. Could we instead use a dynamic switch to control
> > > whether scan for zero-filled pages when reading /proc/[pid]/smaps?
> >
> > Maybe a kernel cmdline option could do?
> Kernel command line parameters can meet our requirements.
>
> > Selectively enabling it for some PIDs only is not really possible, but also, maybe it's not really needed.
> Yes, it is unnecessary to do that.
>
> By the way, will you send a new patch for this, or shall I take care of it?

You :)

--
Cheers,

David