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Date:	Tue, 28 Jun 2011 22:49:55 -0600
From:	Bruce Guenter <>
Subject: Re: [PATCH v2] ext4: Deprecate data=journal mount option

On Tue, Jun 28, 2011 at 01:26:03PM +0200, Lukas Czerner wrote:
> Data journalling mode (data=journal) is known to be neglected by
> developers and only minority of people is actually using it. This
> mode is also less tested than the other two modes by the developers.
> This creates a dangerous combination, because the option which seems
> *safer* is actually less safe the others. So this commit adds a warning
> message in case that data=journal mode is used, so the user is informed
> that the mode might be removed in the future.

When I last benchmarked it, data=journal mode was considerably faster
than the other modes for sync heavy work loads, such as mail servers.
Have there been improvements to other (safe) modes that reverse this?

Bruce Guenter <>      

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