linux-ext4 - Re: [PATCH 0/3] Remove ext3 filesystem driver

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Message-ID: <55A6780E.2040702@redhat.com>
Date:	Wed, 15 Jul 2015 10:11:10 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	Randy Dunlap <rdunlap@...radead.org>,
	"Theodore Ts'o" <tytso@....edu>, Jan Kara <jack@...e.com>,
	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	Jens Axboe <axboe@...nel.dk>
Subject: Re: [PATCH 0/3] Remove ext3 filesystem driver

On 7/15/15 10:09 AM, Randy Dunlap wrote:
> On 07/15/15 08:05, Randy Dunlap wrote:
>> On 07/15/15 07:18, Theodore Ts'o wrote:
>>> On Wed, Jul 15, 2015 at 12:26:24PM +0200, Jan Kara wrote:
>>>>
>>>>   so I have created this patch set which removes ext3 driver (and some related support
>>>> code) from the kernel. See changelog of patch 2/3 for more details. If noone objects,
>>>> I will queue the series in my tree for the next merge window.
>>>>
>>>> Jens, are you OK with me merging patch 3/3 or do you want me to send it to you once
>>>> the first two patches get merged?
>>>>
>>>> Ted, this also touches ext4 driver so that it always handles ext3 filesystems so ack
>>>> from you would be nice.
>>>
>>> Got tired of maintaining ext3, eh?   :-)
>>>
>>> As a minor nit, I wonder if it's worth while to put in some hackery in
>>> fs/Kconfig so that if someone only has CONFIG_FS_EXT3 defined, but not
>>> CONFIG_FS_EXT4 defined, that it will automatically enable
>>> CONFIG_FS_EXT4 instead?  Otherwise someone upgrading their kernel
>>> might accidentally end up getting a non-functional kernel.
>>>
>>> i.e., something like this? (not tested!)
>>>
>>> config FS_EXT3
>>>        def_bool n
>>>        select FS_EXT4
>>
>>
>> Yes, if someone is going to force us to use ext4, some automation would
>> be helpful.
>>
>> Thanks,
>>
> 
> Are there any other changes required, e.g., to /etc/fstab ?
> 
> btw, this looks like an April 1 joke to me.

no fstab changes required.  The ext4 driver has been able to register
itself as ext[23] for quite some time now, so it's transparent.

Many/most distros have been using the ext4.ko driver for ext3 & ext2 for
years.  You may already be using that on some boxes, and not even know it.
;)

-Eric
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