linux-kernel - Re: Problem w/ CONFIG_DEBUG_BLOCK_EXT

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Message-ID: <48BD1E30.8040602@kernel.org>
Date:	Tue, 02 Sep 2008 13:06:24 +0200
From:	Tejun Heo <tj@...nel.org>
To:	"Alan D. Brunelle" <Alan.Brunelle@...com>
CC:	device-mapper development <dm-devel@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Jens Axboe <jens.axboe@...cle.com>
Subject: Re: Problem w/ CONFIG_DEBUG_BLOCK_EXT_DEVT

Alan D. Brunelle wrote:
>>> (2) Device minor numbers can be quite large, and the 10-character limits
>>> in dm/lib/libdm-deptree.c are too small.
>> Would it be difficult to increase that?
> 
> No, but knowing the upper bound would be helpful.

Well, dev_t is 32bits and MINORBITS is 20.  So, major 12 bits, minor 20
bits, so 4 characters for major, 7 characters for minor.

-- 
tejun
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