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From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
To: Tejun Heo <tj@kernel.org>
Subject: Re: [PATCH #blk-for-2.8] init: DEBUG_BLOCK_EXT_DEVT requires explicit root= param
Date: Mon, 1 Sep 2008 18:34:02 +0200
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Cc: Jens Axboe <jens.axboe@oracle.com>,
       Stephen Rothwell <sfr@canb.auug.org.au>, linux-next@vger.kernel.org,
       LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
       dm-devel@redhat.com
References: <20080827183453.eb651f50.sfr@canb.auug.org.au> <20080901113059.GO20055@kernel.dk> <48BBD429.50907@kernel.org>
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On Monday 01 September 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.  Also, add warning
> to the help text.
> 
> Signed-off-by: Tejun Heo <tj@kernel.org>
> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Thanks Tejun.  With this patch I'm also fine with having
DEBUG_BLOCK_EXT_DEVT enabled by default.