Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1739916

Re: [PATCH 3/7] xfs: protect S_DAX transitions in XFS read path

Show all headers | View raw

On Mon, Sep 25, 2017 at 11:32 PM, Christoph Hellwig <hch@lst.de> wrote:
> We can't just take locking one level up, as we need differnet locking
> for different kinds of I/O.
>
> I think you probably want an IOCB_DAX flag to check IS_DAX once and
> then stick to it, similar to what we do for direct I/O.

I wonder if this works better with a reference count mechanism
per-file so that we don't need a hold a lock over the whole
transition. Similar to request_queue reference counting, when DAX is
being turned off we block new references and drain the in-flight ones.

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH 3/7] xfs: protect S_DAX transitions in XFS read path Ross Zwisler <ross.zwisler@linux.intel.com> - 2017-09-26 01:20 +0200
  Re: [PATCH 3/7] xfs: protect S_DAX transitions in XFS read path Dave Chinner <david@fromorbit.com> - 2017-09-26 02:10 +0200
  Re: [PATCH 3/7] xfs: protect S_DAX transitions in XFS read path Christoph Hellwig <hch@lst.de> - 2017-09-26 08:40 +0200
    Re: [PATCH 3/7] xfs: protect S_DAX transitions in XFS read path Dan Williams <dan.j.williams@intel.com> - 2017-09-26 16:10 +0200
      Re: [PATCH 3/7] xfs: protect S_DAX transitions in XFS read path Christoph Hellwig <hch@lst.de> - 2017-09-26 16:40 +0200
        Re: [PATCH 3/7] xfs: protect S_DAX transitions in XFS read path Dan Williams <dan.j.williams@intel.com> - 2017-09-26 20:20 +0200
          Re: [PATCH 3/7] xfs: protect S_DAX transitions in XFS read path Christoph Hellwig <hch@lst.de> - 2017-10-01 10:20 +0200

csiph-web