Hello Neil,
I'm sending the patches for external metadata migrations.
Both md/mdadm patches are based on OLCE patches sent by
Adam Kwolek some time ago.

The most important issues that are implemented:
1. support for non-grow reshape (OLCE patches were focused on
grow-reshape with new devices added)
2. mdadm critical data backup mechanism for external metadata.
This includes:
- new external API for handling backups
- IMSM specific implementation for backups and checkpointing
that uses IMSM migration record
3. compatibility issues with IMSM metadata

---

Maciej Trela (2):
md: raid5 return new layout in mdstat while reshaping
md: raid5: update suspend_hi during the reshape


drivers/md/raid5.c | 13 +++++++++++--
1 files changed, 11 insertions(+), 2 deletions(-)

--
Maciek Trela
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Hi Maciej,

On Wed, Jul 21, 2010 at 4:03 AM, Trela, Maciej <Maciej.Trela [at] intel.com> wrote:
> Hello Neil,
> I'm sending the patches for external metadata migrations.
> Both md/mdadm patches are based on OLCE patches sent by
> Adam Kwolek some time ago.

....which Adam and I are still in the process of reworking. I'll take
a look at these but just note that the baseline may yet change.

--
Dan
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> -----Original Message-----
> From: dan.j.williams [at] gmail.com [mailto:dan.j.williams [at] gmail.com] On
> Behalf Of Dan Williams
> Sent: Wednesday, July 21, 2010 6:37 PM
> To: Trela, Maciej
> Cc: Neil Brown; Kwolek, Adam; linux-raid [at] vger.kernel.org
> Subject: Re: [PATCH 0/2] md: migrations for external metadata
>
> Hi Maciej,
>
> On Wed, Jul 21, 2010 at 4:03 AM, Trela, Maciej <Maciej.Trela [at] intel.com>
> wrote:
> > Hello Neil,
> > I'm sending the patches for external metadata migrations.
> > Both md/mdadm patches are based on OLCE patches sent by
> > Adam Kwolek some time ago.
>
> ...which Adam and I are still in the process of reworking. I'll take
> a look at these but just note that the baseline may yet change.
>

Hello Dan,

Yes, I'm aware of that but I hope those changes in takeover and OLCE
will not cause any dramatic changes to checkpointing patches.

I wanted to make sure that the code is heading in the right direction
and will not require serious architectural changes in the future.
(especially mdadm-mdmon-md communication for backups)

I appreciate any feedback as usual! :))

Thanks,
Maciek.

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