[dm-devel] Re: [PATCH #blk-for-2.8] init: DEBUG_BLOCK_EXT_DEVT requires explicit root= param

[Jens Axboe <jens axboe oracle com>]

On Mon, Sep 01 2008, Tejun Heo wrote:
> DEBUG_BLOCK_EXT_DEVT shuffles SCSI and IDE device numbers and root
> device number set using rdev become meaningless.  Root devices should
> be explicitly specified using textual names.  Warn about it if root
> can't be found and DEBUG_BLOCK_EXT_DEVT is enabled.
> 
> Signed-off-by: Tejun Heo <tj kernel org>
> Cc: Bartlomiej Zolnierkiewicz <bzolnier gmail com>
> ---
> There are other ways to specify device numbers directly (ie. root=8:0)
> and DEBUG_BLOCK_EXT_DEVT being a debug option I don't think it
> warrants a complex logic, so I just added simple warning message.

How about just putting that in the help entry as well? Given that it's
now defaulting to 'n', people that enable it should read the help text
anyway.

-- 
Jens Axboe