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Date:	Fri, 23 Nov 2012 14:20:09 -0200
From:	Carlos Maiolino <>
To:	Ric Wheeler <>
Cc:	Eric Sandeen <>, "Theodore Ts'o" <>,
Subject: Re: [PATCH] ext4: check incompatible mount options when mounting

Hi, sorry my delayed answer on this thread.

> >Anyway, back to my main point:  As a guiding principle I think I would
> >say that mount -t ext3 with ext4.ko should hard-reject any option not
> >understood by ext3.ko.  It's clear and predictable, and should make for
> >a decent first cut.
> >
> >-Eric
> Agreed (sounds almost like we had coordinated our answers before I
> spoke to Ted in Barcelona!).
> Ric
that's my main point, and the goal of my first patch. I was thinking in just
warn when mounting a ext3 with ext4.ko using mount options not recognized by
ext3.ko, but, looks like hard-reject these options looks more reasonable than
just warning.

I'm going to re-write the patch using this approach. Is there any concern in
take this direction from any part here?

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