Re: [PATCH v3 2/5] block: Add bdev_supports_dax() for dax mount checks

From	Toshi Kani <toshi.kani@hpe.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v3 2/5] block: Add bdev_supports_dax() for dax mount checks
Date	2016-05-10 00:50 +0200
Message-ID	<rx29X-6uv-1@gated-at.bofh.it> (permalink)
References	(1 earlier) <rvBYf-2li-57@gated-at.bofh.it> <rwCpb-4eI-9@gated-at.bofh.it> <rwY6l-2x2-3@gated-at.bofh.it> <rwY6l-2x2-1@gated-at.bofh.it> <rx0KT-5bF-11@gated-at.bofh.it>
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On Tue, 2016-05-10 at 07:19 +1000, Dave Chinner wrote:
> On Mon, May 09, 2016 at 11:23:03AM -0700, Dan Williams wrote:
> > 
> > On Mon, May 9, 2016 at 11:12 AM, Toshi Kani <toshi.kani@hpe.com> wrote:
> > > 
> > > On Sun, 2016-05-08 at 12:14 -0700, Dan Williams wrote:
> > > > 
> > > > On Thu, May 5, 2016 at 5:29 PM, Toshi Kani <toshi.kani@hpe.com>
> > > > wrote:
 :
> > > > This patch should replace blkdev_dax_capable(), or just reuse that
> > > > existing routine, or am I missing something?
> > >
> > > Good question.  bdev_supports_dax() is a helper function tailored for
> > > the filesystem's mount -o dax case.  While blkdev_dax_capable() is
> > > similar, it does not need error messages like "device does not
> > > support dax" since it implicitly enables dax when capable.  So, I
> > > think we can keep blkdev_dax_capable(), but change it to call
> > > bdev_direct_access() so that actual check is performed in a single
> > > place.
> >
> > Sounds good to me.
>
> Can you name them consistently then? i.e. blkdev_dax_supported() and
> blkdev_dax_capable()?

Sure.  Will do.

Thanks,
-Toshi

Thread

[PATCH v3 2/5] block: Add bdev_supports_dax() for dax mount checks Toshi Kani <toshi.kani@hpe.com> - 2016-05-06 02:40 +0200
  Re: [PATCH v3 2/5] block: Add bdev_supports_dax() for dax mount  checks Christoph Hellwig <hch@infradead.org> - 2016-05-08 11:00 +0200
  Re: [PATCH v3 2/5] block: Add bdev_supports_dax() for dax mount checks Dan Williams <dan.j.williams@intel.com> - 2016-05-08 21:20 +0200
    Re: [PATCH v3 2/5] block: Add bdev_supports_dax() for dax mount checks Dan Williams <dan.j.williams@intel.com> - 2016-05-09 20:30 +0200
      Re: [PATCH v3 2/5] block: Add bdev_supports_dax() for dax mount  checks Dave Chinner <david@fromorbit.com> - 2016-05-09 23:20 +0200
        Re: [PATCH v3 2/5] block: Add bdev_supports_dax() for dax mount  checks Toshi Kani <toshi.kani@hpe.com> - 2016-05-10 00:50 +0200
          Re: [PATCH v3 2/5] block: Add bdev_supports_dax() for dax mount  checks Toshi Kani <toshi.kani@hpe.com> - 2016-05-10 01:10 +0200
    Re: [PATCH v3 2/5] block: Add bdev_supports_dax() for dax mount  checks Toshi Kani <toshi.kani@hpe.com> - 2016-05-09 20:30 +0200

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