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SubjectRe: [RFC 0/7] [RFC] cramfs: fake write support
arnd@arndb.de wrote:
> Many existing systems currently use unionfs or aufs for this
> purpose, by overlaying a tmpfs over a read-only file
> system like cramfs, squashfs or iso9660. IMHO, it would
> be a much nicer solution to not require unionfs for a simple
> case like this, but rather have support for it in the file
> system. If people find this useful, we can do the same in
> other read-only file system.
>

I don't agree that it is nicer to do this in cramfs. I prefer the
technique of union of a tmpfs over some other fs because a single
solution that works with all filesystems is better than re-implementing
the same idea in multiple filesystems. Multiple implementations is a
recipe for bugs and feature mismatch.


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