Ocfs2 devel - Feb 2016 - [LFS/MM TOPIC] fs reflink issues, fs online scrub/check, etc

[resend, email exploded, sorry...]

Hi,

I want to discuss a few FS related topics that I haven't already seen on
the mailing lists:

 * Shared pagecache pages for reflinked files (and by extension making dax
   work with reflink on xfs)

 * Providing a simple interface for scrubbing filesystem metadata in the
   background (the online check thing).  Ideally we'd make it easy to
discover
   what kind of metadata there is to check and provide a simple interface to
   check the metadata, once discovered.  This is a tricky interface topic
   since FS design differs pretty widely.

 * Rudimentary online repair and rebuilding (xfs) from secondary metadata

 * Working out the variances in the btrfs/xfs/ocfs2/nfs reflink implementations
   and making sure they all get test coverage

I would also like participate in some of the proposed discussions:

 * The ext4 summit (and whatever meeting of XFS devs may happen)

 * Integrating existing filesystems into pmem, or hallway bofs about designing
   new filesystems for pmem

 * Actually seeing the fs developers (well, everyone!) in person again :)

--Darrick

Since SMB3 protocol has at least three ways to do copy offload (server
side copy),
the reflink topic is of interest to me and likely useful to discuss
for Samba server as
well as client (cifs.ko)

On Wed, Feb 10, 2016 at 1:19 PM Darrick J. Wong <darrick.wong at
oracle.com> wrote:
>
> [resend, email exploded, sorry...]
>
> Hi,
>
> I want to discuss a few FS related topics that I haven't already seen
on
> the mailing lists:
>
>  * Shared pagecache pages for reflinked files (and by extension making dax
>    work with reflink on xfs)
>
>  * Providing a simple interface for scrubbing filesystem metadata in the
>    background (the online check thing).  Ideally we'd make it easy to
discover
>    what kind of metadata there is to check and provide a simple interface
to
>    check the metadata, once discovered.  This is a tricky interface topic
>    since FS design differs pretty widely.
>
>  * Rudimentary online repair and rebuilding (xfs) from secondary metadata
>
>  * Working out the variances in the btrfs/xfs/ocfs2/nfs reflink
implementations
>    and making sure they all get test coverage
>
> I would also like participate in some of the proposed discussions:
>
>  * The ext4 summit (and whatever meeting of XFS devs may happen)
>
>  * Integrating existing filesystems into pmem, or hallway bofs about
designing
>    new filesystems for pmem
>
>  * Actually seeing the fs developers (well, everyone!) in person again :)
>
> --Darrick
> --
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-- 
Thanks,

Steve