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

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Message-ID: <1473342519.2092.42.camel@hpe.com>
Date:   Thu, 8 Sep 2016 13:49:40 +0000
From:   "Kani, Toshimitsu" <toshi.kani@....com>
To:     "kirill@...temov.name" <kirill@...temov.name>
CC:     "hughd@...gle.com" <hughd@...gle.com>,
        "kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "adilger.kernel@...ger.ca" <adilger.kernel@...ger.ca>,
        "mike.kravetz@...cle.com" <mike.kravetz@...cle.com>,
        "dan.j.williams@...el.com" <dan.j.williams@...el.com>,
        "mawilcox@...rosoft.com" <mawilcox@...rosoft.com>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "ross.zwisler@...ux.intel.com" <ross.zwisler@...ux.intel.com>,
        "tytso@....edu" <tytso@....edu>,
        "david@...morbit.com" <david@...morbit.com>,
        "jack@...e.cz" <jack@...e.cz>
Subject: Re: [PATCH v4 RESEND 0/2] Align mmap address for DAX pmd mappings

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:
> > 
> > On Mon, 2016-08-29 at 15:31 -0600, Kani, Toshimitsu wrote:
> > > 
> > > On Mon, 2016-08-29 at 23:48 +0300, Kirill A. Shutemov wrote:
> > > > 
 :
> > Looking further, these shmem_huge handlings only check pre-
> > conditions.  So, we should 
> > be able to make shmem_get_unmapped_area() 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.

Thanks,
-Toshi