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Date:   Mon, 27 Feb 2023 13:49:27 +0000
From:   David Howells <>
To:     "Matthew Wilcox (Oracle)" <>
        Hugh Dickins <>,,
Subject: Re: [PATCH 4/5] afs: Zero bytes after 'oldsize' if we're expanding the file

Matthew Wilcox (Oracle) <> wrote:

> POSIX requires that "If the file size is increased, the extended area
> shall appear as if it were zero-filled".  It is possible to use mmap to
> write past EOF and that data will become visible instead of zeroes.
> Signed-off-by: Matthew Wilcox (Oracle) <>

That seems to work.  Do you want me to pass it on to Linus?  If not:

Acked-by: David Howells <>

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