linux-kernel - Re: [PATCH v2 3/8] mm/gup: make __gup_longterm

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Date:   Thu, 10 Dec 2020 08:30:03 -0500
From:   Pavel Tatashin <pasha.tatashin@...een.com>
To:     Ira Weiny <ira.weiny@...el.com>
Cc:     LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Michal Hocko <mhocko@...e.com>,
        David Hildenbrand <david@...hat.com>,
        Oscar Salvador <osalvador@...e.de>,
        Dan Williams <dan.j.williams@...el.com>,
        Sasha Levin <sashal@...nel.org>,
        Tyler Hicks <tyhicks@...ux.microsoft.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>, mike.kravetz@...cle.com,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>, Jason Gunthorpe <jgg@...pe.ca>,
        Peter Zijlstra <peterz@...radead.org>,
        Mel Gorman <mgorman@...e.de>,
        Matthew Wilcox <willy@...radead.org>,
        David Rientjes <rientjes@...gle.com>,
        John Hubbard <jhubbard@...dia.com>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>
Subject: Re: [PATCH v2 3/8] mm/gup: make __gup_longterm_locked common

On Wed, Dec 9, 2020 at 11:06 PM Ira Weiny <ira.weiny@...el.com> wrote:
>
> On Wed, Dec 09, 2020 at 07:43:30PM -0500, Pavel Tatashin wrote:
> > __gup_longterm_locked() has CMA || FS_DAX version and a common stub
> > version. In the preparation of prohibiting longterm pinning of pages from
> > movable zone make the CMA || FS_DAX version common, and delete the stub
> > version.
>
> I thought Jason sent a patch which got rid of this as well?

Yes, this series applies on the mainline so it can be easily tested.
The next version, I will sync with linux-next.

Thank you,
Pasha

>
> Ira
>
> >
> > Signed-off-by: Pavel Tatashin <pasha.tatashin@...een.com>
> > Reviewed-by: John Hubbard <jhubbard@...dia.com>
> > ---
> >  mm/gup.c | 13 -------------
> >  1 file changed, 13 deletions(-)
> >
> > diff --git a/mm/gup.c b/mm/gup.c
> > index 3a76c005a3e2..0e2de888a8b0 100644
> > --- a/mm/gup.c
> > +++ b/mm/gup.c
> > @@ -1567,7 +1567,6 @@ struct page *get_dump_page(unsigned long addr)
> >  }
> >  #endif /* CONFIG_ELF_CORE */
> >
> > -#if defined(CONFIG_FS_DAX) || defined (CONFIG_CMA)
> >  #ifdef CONFIG_FS_DAX
> >  static bool check_dax_vmas(struct vm_area_struct **vmas, long nr_pages)
> >  {
> > @@ -1757,18 +1756,6 @@ static long __gup_longterm_locked(struct mm_struct *mm,
> >               kfree(vmas_tmp);
> >       return rc;
> >  }
> > -#else /* !CONFIG_FS_DAX && !CONFIG_CMA */
> > -static __always_inline long __gup_longterm_locked(struct mm_struct *mm,
> > -                                               unsigned long start,
> > -                                               unsigned long nr_pages,
> > -                                               struct page **pages,
> > -                                               struct vm_area_struct **vmas,
> > -                                               unsigned int flags)
> > -{
> > -     return __get_user_pages_locked(mm, start, nr_pages, pages, vmas,
> > -                                    NULL, flags);
> > -}
> > -#endif /* CONFIG_FS_DAX || CONFIG_CMA */
> >
> >  static bool is_valid_gup_flags(unsigned int gup_flags)
> >  {
> > --
> > 2.25.1
> >
> >