linux-ext4 - Re: [PATCH 2/4][e2fsprogs] Allow FLEX_BG to be use as a feature option at mke2fs time.

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Message-ID: <20071103181858.GA18836@thunk.org>
Date:	Sat, 3 Nov 2007 14:18:58 -0400
From:	Theodore Tso <tytso@....edu>
To:	"Jose R. Santos" <jrs@...ibm.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 2/4][e2fsprogs] Allow FLEX_BG to be use as a feature
	option at mke2fs time.

On Mon, Aug 13, 2007 at 11:32:57PM -0500, Jose R. Santos wrote:
> From: Jose R. Santos <jrs@...ibm.com>
> 
> Allow FLEX_BG to be use as a feature option at mke2fs time.
> 
> @@ -1363,6 +1364,10 @@ static void PRS(int argc, char *argv[])
>  		fs_param.s_feature_ro_compat = 0;
>   	}
>  	
> +	if (fs_param.s_feature_incompat &
> +	    EXT4_FEATURE_INCOMPAT_FLEX_BG)
> +		fs_param.s_feature_incompat |= EXT2_FEATURE_INCOMPAT_META_BG;
> +
>  	/* Set first meta blockgroup via an environment variable */
>  	/* (this is mostly for debugging purposes) */
>  	if ((fs_param.s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) &&

Why is this hunk here?  Just for convenience, right?  Technically
there's no reason why we can't relax the location of the inode tables
and bitmap blocks without going to meta_bg.  My inclination is to keep
the options as orthogonal as possible, and use mke2fs.conf to allow
the user to conveniently set up filesystems with the appropriate
configuration parameters.

						- Ted
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