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Date:   Mon, 11 Nov 2019 23:56:58 +0530
From:   Naresh Kamboju <>
To:     Jan Stancek <>
Cc:     Christoph Hellwig <>,
        "Darrick J. Wong" <>,
        LTP List <>,
        Linux-Next Mailing List <>,, chrubis <>,
        open list <>,
        Al Viro <>,
        Mark Brown <>, Arnd Bergmann <>,,
        linux-ext4 <>,
        "Theodore Ts'o" <>
Subject: Re: LTP: diotest4.c:476: read to read-only space. returns 0: Success

On Mon, 11 Nov 2019 at 16:09, Jan Stancek <> wrote:
> ----- Original Message -----
> > Is this a new test?
> No, it's not new.
> > If not why was this never reported?  Sounds like
> > we should add this test case to xfstests.
> I'm guessing not that many users still run 32bit kernels.
> Naresh' setup is using ext4, so I assume he noticed only
> after recent changes in linux-next wrt. directio and ext4.

That's true.
Started noticing recently from Linux next-20191107 kernel on i386 and arm32.

Steps to reproduce:
./runltp -f dio -d /mounted-ext4-drive

- Naresh

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