linux-kernel - Re: [dm-devel] add devname module aliases to allow module on-demand auto-loading

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Date:	Tue, 25 May 2010 07:33:41 +0200
From:	Luca Berra <bluca@...edia.it>
To:	Kay Sievers <kay.sievers@...y.org>
Cc:	Nikanth Karthikesan <knikanth@...e.de>,
	Peter Rajnoha <prajnoha@...hat.com>,
	Milan Broz <mbroz@...hat.com>,
	Alasdair G Kergon <agk@...hat.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	"David S. Miller" <davem@...emloft.net>,
	Miklos Szeredi <miklos@...redi.hu>,
	Chris Mason <chris.mason@...cle.com>,
	Tigran Aivazian <tigran@...azian.fsnet.co.uk>,
	Ian Kent <raven@...maw.net>, dm-devel@...hat.com
Subject: Re: [dm-devel] add devname module aliases to allow module
	on-demand auto-loading

On Fri, May 21, 2010 at 08:51:49PM +0200, Kay Sievers wrote:
>On Fri, May 21, 2010 at 20:23, Alasdair G Kergon <agk@...hat.com> wrote:
>> On Fri, May 21, 2010 at 03:55:21PM +0200, Kay Sievers wrote:
>>> >> On my box without this patch:
>>> >>   dmsetup version
>>> >>   Library version:   1.02.42 (2010-01-14)
>>> >>   /proc/misc: No entry for device-mapper found
>>> >>   Is device-mapper driver missing from kernel?
>>> >>   Failure to communicate with kernel device-mapper driver.
>>
>> (Curiously this is not an issue I remember anyone raising with me as a problem
>> before.)
I am fairly sure i did report that, i even tried moving the module
loading framework from lvm2 to device mapper, but the resulting code
sucked too much to submit, the idea was to load device-mapper module,
and all target modules on first use.

>Because distros go the easy and stupid way and just load everything
>they configured as a module. :) That is something to solve, or at
>least avoid and hide a bit.
In this case we were forced to preload dm-mod to work around the issue
;)

>
>I think its all covered with this patch. :) But if yo have any better
>idea, let us know.

what patch?

L.
-- 
Luca Berra -- bluca@...edia.it
         Communication Media & Services S.r.l.
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