linux-ext4 - Re: RFC: remove CONFIG_EXT4_FS

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Message-ID: <50BFD2EB.9070206@redhat.com>
Date:	Wed, 05 Dec 2012 17:04:11 -0600
From:	Eric Sandeen <sandeen@...hat.com>
To:	"Theodore Ts'o" <tytso@....edu>
CC:	linux-ext4@...r.kernel.org, Tao Ma <tm@....ma>
Subject: Re: RFC: remove CONFIG_EXT4_FS_XATTR

On 12/5/12 4:35 PM, Theodore Ts'o wrote:
> 
> The number of build warnings that were generated with the inline data
> patch makes me think that perhaps we should just remove
> CONFIG_EXT4_FS_XATTR.  Turning off CONFIG_EXT4_FS_XATTR causes a net
> decrease in the ext4 file system by 27k (about 7.3% if ext4 is built as
> a module; the entire compiled kernel's text+data size for my
> all-in-one-no-modules-for-kvm-testing is 19 megabytes).
> 
> Another advantage of making this change is with the inline data option,
> if you turn off CONFIG_EXT4_FS_XATTR, it will still allow a file system
> with inline_data to be mounted, but then attempts to read small files or
> small directories will end up returning EOPNOTSUPP, which will be
> surprising to end users in a very serious way.  (Assuming it works at
> all; I haven't tested to make sure it fails cleanly, and I'm not sure
> Tao has tested that case either; so easing our test matrix is another
> reason why removing this config option would be helpful.)
> 
> Does anyone have any objections or other reasons why this would be a bad
> idea?

It doesn't bother me; everything in my universe builds with it on.

-Eric

>                                                 - Ted
> 
> 
> 
> 
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