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Date:   Thu, 11 Jan 2018 13:21:24 -0500
From:   Theodore Ts'o <>
To:     Eric Whitney <>
Subject: Re: [PATCH] common/rc: ext4 doesn't support O_DIRECT with data

On Wed, Jan 10, 2018 at 04:19:05PM -0500, Eric Whitney wrote:
> Modify _require_odirect() to skip O_DIRECT tests if the ext4 mount
> option data=journal has been applied.  Because ext4 disables its
> O_DIRECT support when in data journaling mode, no significant value is
> obtained by running these tests and they consume a significant amount
> of run time.  Additionally, this change eliminates the need to triage
> false negative O_DIRECT test results caused by test problems, as has
> occurred from time to time.
> Signed-off-by: Eric Whitney <>

Reviewed-by: Theodore Ts'o <>

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