Re: [Ext2-devel] [RFC 0/13] extents and 48bit ext3

[Jeff Garzik]

Alex Tomas wrote:
> > > > > > Jeff Garzik (JG) writes:
>
>  JG> Alex Tomas wrote:
>  JG> "ext3" will become more and more meaningless.  It could mean
>  >> _any_ of  JG> several filesystem metadata variants, and the admin
>  >> will have no clue  JG> which variant they are talking to until they
>  >> try to mount the blkdev  JG> (and possibly fail the mount).
>  >> debugfs <dev> -R stats | grep features ?
>
>  JG> The question is, do you
>
>  JG> a) expect users to run this magic command, and DTRT or
>
>  JG> b) watch users boot w/ extents, accidentally do something silly like
>  JG> writing data to a file, and become locked into a new subset of kernels?
>
> at the moment there is no way to "boot w/ extents". you must enable
> them by mount option.

Think about how distros will deploy this feature.  Also, think about how 
scalable that line of thinking is...

	Jeff



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