Re: Minor mdadm fixes

[Andre Noll <maan@systemlinux.org>]

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On 22:36, Doug Ledford wrote:
> > I believe (Doug, please correct me if the following is wrong) the
> > advantage of storing mdmon's pid files in /dev is that in /dev they
> > remain visible after the switch to the new root. That's the "handoff
> > after pivotroot" in the subject.
> 
> I'm a little fuzzy on this myself.  The original patch was from another
> Red Hatter that works on dracut, the new mkinitrd replacement in Fedora
> 12.  When integrating IMSM support in the md raid stack and dracut,
> there became a problem with starting mdmon in the initramfs filesystem
> and then transitioning it to the new filesystem.  It turns out that, as
> you point out, because /dev is moved from the initramfs to the new root
> (mainly because udev is now started in the initramfs), we could avoid a
> number of issues caused by mdmon's files being in /var/run instead of
> /dev.

One could also mount /var/run in the initramfs and move it over
like /dev, but that gets a bit messy because /var might be on a yet
another fs..

> This also allowed us to do the mdmon restart *after* the switchroot
> had taken place and solved a number of issues with getting mdmon
> support to work.

Just out of interest: Why does mdmon need the restart at all?

Thanks
Andre
-- 
The only person who always got his work done by Friday was Robinson Crusoe

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