Re: [RFC PATCH 2/3] raid: external and internal metadata support

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NeilBrown (neilb@xxxxxxx) said: 
> > You shut down the machine. After a while, you get to the point where
> > you're getting ready to unmount the filesystem. Since mdmon's running
> > on it (if you started it post boot), you have to kill it. After that
> > point, there are going to be writes (a final sync, if nothing else,
> > when you unmount the filesystem.) And you won't be able to set any
> > RAID metadata flags then, as the daemon won't be running. So, doing
> > a later run of "mdmon /proc/mdstat" doesn't fully protect you.
> 
> Last time I checked, Linux would not unmount the root filesystem.
> It just remounts it 'read-only'.
> Is that going to change?

Yeah, I screwed up that part. However, it still syncs, and the mdmon process
will still be dead.

Bill
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