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Date:   Sat, 28 Mar 2020 22:17:28 -0400
From:   "Theodore Y. Ts'o" <>
To:     Ritesh Harjani <>
Cc:, Jan Kara <>,
        "Aneesh Kumar K . V" <>
Subject: Re: [PATCH] ext4: Don't set dioread_nolock by default for blocksize
 < pagesize

On Sat, Mar 28, 2020 at 01:37:44AM +0530, Ritesh Harjani wrote:
> Currently on calling echo 3 > drop_caches on host machine, we see
> FS corruption in the guest. This happens on Power machine where
> blocksize < pagesize.
> So as a temporary workaound don't enable dioread_nolock by default
> for blocksize < pagesize until we identify the root cause.
> Also emit a warning msg in case if this mount option is manually
> enabled for blocksize < pagesize.
> Reported-by: Aneesh Kumar K.V <>
> Signed-off-by: Ritesh Harjani <>

Thanks, applied.

					- Ted

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