Re: [PATCH v4 RESEND 0/2] Align mmap address for DAX pmd mappings

[Kirill A. Shutemov]

On Thu, Sep 08, 2016 at 11:21:46PM +0000, Kani, Toshimitsu wrote:
> On Thu, 2016-09-08 at 07:48 -0600, Kani, Toshimitsu wrote:
> > On Thu, 2016-09-08 at 13:57 +0300, Kirill A. Shutemov wrote:
> > > 
> > > On Mon, Aug 29, 2016 at 10:00:43PM +0000, Kani, Toshimitsu wrote:
>  :
> > > > 
> > > > Looking further, these shmem_huge handlings only check pre-
> > > > conditions.  So, we should be able to make shmem_get_unmapped_are
> > > > a() as a wrapper, which checks such shmem-specific conitions, and
> > > > then call __thp_get_unmapped_area() for the actual work.  All
> > > > DAX-specific checks are performed in thp_get_unmapped_area() as
> > > > well.  We can make  __thp_get_unmapped_area() as a common
> > > > function.
> > > > 
> > > > I'd prefer to make such change as a separate item,
> > > 
> > > Do you have plan to submit such change?
> > 
> > Yes, I will submit the change once I finish testing.
> 
> I found a bug in the current code, and need some clarification.  The
> if-statement below is reverted.

<two-hands-facepalm>

Yeah. It was repored by Hillf[1]. The fixup got lost. :(

Could you post a proper patch with the fix?

I would be nice to credit Hillf there too.

[1] http://lkml.kernel.org/r/054f01d1c86f$2994d5c0$7cbe8140$@alibaba-inc.com

-- 
 Kirill A. Shutemov