[ANN] unionfs patchset-19-20070504 release, it is now MPSAFE and transparent mode as default

Danny Braniss danny at cs.huji.ac.il
Sun May 6 08:34:40 UTC 2007

> Hi Guys
> It is my pleasure and honor to announce the availability of
> the unionfs patchset-19-20070504. p19 is second patchset after
> its merged of FreeBSD. Our improvements works of unionfs are
> going step by step. p19 is milestone release.
> Patchset-19-20070504:
>     For 7-current
>       http://people.freebsd.org/~daichi/unionfs/unionfs-p19-20070504.diff
>     For 6-stable
>       http://people.freebsd.org/~daichi/unionfs/unionfs6-p19-20070504.diff
>     Changes in unionfs-p19-20070504.diff
>       - It has been became MPSAFE.
>       - Default copy mode has been changed from traditional-mode to
>         transparent-mode. Some folks who have reported some issues
>         have solved with transparent mode. We guess it is time to
>         change the default copy mode. The transparent-mode is the
>         best in most situations.
>       - Fixed kern/111262 issue.
>       - Added support of vfs_cache on unionfs. As a result, you
>         can use applications that use procfs on unionfs.
>       - Removed unionfs internal cache mechanism because it has
>         vfs_cache support instead. As a result, it just simplified
>         code of unionfs.
>       - Added whiteout behavior option. ``-o whiteout=always'' is
>         default mode(it is established practice) and
>         ``-o whiteout=whenneeded'' is less disk-space using mode
>         especially for resource restricted environments like embedded
>         environments. (Contributed by Ed Schouten. Thanks)
>       - Fixed a mtx lock issue happened with nullfs.
>       - Fixed lock issues around unionfs.
>       - Added NULL check code pointed out by Coverity. (Pointed out
>         by Stanislav Sedov. Thanks)
> The documents of those unionfs patches:
>    http://people.freebsd.org/~daichi/unionfs/  (English)
>    http://people.freebsd.org/~daichi/unionfs/index-ja.html  (Japanese)
> Request for Test:
>    Unionfs lovers including FreeSBIE developers, ports cluster managers,
>    heavy memory-fs users and folks use unionfs, could you try p19 please?
> Merge plan:
>    I have plan to commit unionfs-p19-20070504.diff to -current after
>    received unionfs users responses.
> Thanks
> P.S.
> I am going to join BSDCan 2007. Lets meet at Ottawa, Canada :)
> -- 
>    Daichi GOTO, http://people.freebsd.org/~daichi

	So far I've tested it under -current, in my diskless env. where
/etc & /compat/linux are unionfs'ed with a mfs, and so all seems OK.


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