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

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Message-ID: <20150729134923.GA7593@quack.suse.cz>
Date:	Wed, 29 Jul 2015 15:49:23 +0200
From:	Jan Kara <jack@...e.cz>
To:	Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Cc:	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>, Ted Tso <tytso@....edu>
Subject: Re: [PATCH 0/3] Remove ext3 filesystem driver

On Wed 29-07-15 15:20:06, Konstantin Khlebnikov wrote:
> On 15.07.2015 13:26, Jan Kara wrote:
> >   Hello,
> >
> >   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.
> >
> >									Honza
> >
> 
> This means some ext3-specific kludges in mm/ could be dropped.
> Like page cleanup in try_to_free_buffers() and couple in vmscan.

Almost. There are still some cases (like block device mappings or even
standard inode mappings in ext4 data=journal mode) where the page cleanup
hack is needed. See
https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg933319.html

Both issues look fixable although with block device mappings it won't be
trivial.
								Honza
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR
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