linux-kernel - Re: [PATCH 6/6] overlay: overlay filesystem documentation

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Message-ID: <6291.1303186433@jrobl>
Date:	Tue, 19 Apr 2011 13:13:53 +0900
From:	"J. R. Okajima" <hooanon05@...oo.co.jp>
To:	NeilBrown <neilb@...e.de>
Cc:	Miklos Szeredi <miklos@...redi.hu>, viro@...IV.linux.org.uk,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	apw@...onical.com, nbd@...nwrt.org, hramrach@...trum.cz,
	Miklos Szeredi <mszeredi@...e.cz>
Subject: Re: [PATCH 6/6] overlay: overlay filesystem documentation


NeilBrown:
> Only to top level of an overlay stack is writable.  All others are or should
> be read only.  So only the top level can change.
>
> So in your example, fileA will be copied from ro1 directly into rwN where it
> will then be appended to.

I see.
When I have time, I will try building overlayfs.
Thank you.


J. R. Okajima
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