Re: [PATCH v2 0/3] fs/nfsd: accept a backdated timestamp from a delegation holder

[Christian Brauner]

> The main problem is that an attribute delegation has strict rules about
> updates can be done, and that prevents applications that backdate
> timestamps on files after writing them, (e.g. tar -x, cp -p, etc.) from
> setting them properly.
> 
> We could fix this on the client by making it always issue an RPC for the
> SETATTR, but that would harm performance in these common use-cases.
> This set allows the server to accept some of these backdated mtime
> updates, by changing how the ctime is handled.
> 
> It'd be nice to see this in v7.4.
> 
> Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
> ---

There's a bunch of Sashiko comments outstanding, Jeff. Let me know, if I
can ignore them.

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