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Date:   Thu, 6 Jun 2019 09:10:46 -0700
From:   Ira Weiny <>
To:     Christoph Hellwig <>
Cc:     Dan Williams <>, Jan Kara <>,
        Theodore Ts'o <>,
        Jeff Layton <>,
        Dave Chinner <>,
        Matthew Wilcox <>,,
        Andrew Morton <>,
        John Hubbard <>,
        Jérôme Glisse <>,,,,,
Subject: Re: [PATCH RFC 03/10] mm/gup: Pass flags down to __gup_device_huge*

On Wed, Jun 05, 2019 at 11:18:19PM -0700, Christoph Hellwig wrote:
> On Wed, Jun 05, 2019 at 06:45:36PM -0700, wrote:
> > From: Ira Weiny <>
> > 
> > In order to support checking for a layout lease on a FS DAX inode these
> > calls need to know if FOLL_LONGTERM was specified.
> > 
> > Prepare for this with this patch.
> The GUP fast argument passing is a mess.  That is why I've come up
> with this as part of the (not ready) get_user_pages_fast_bvec
> implementation:

Agreed that looks better.

And I'm sure I will have to re-roll this to deal with conflicts with this set.
But for now I needed this for the follow ons and having a nice separate little
patch like this means I can just drop it after I get your clean up!  :-D


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