linux-kernel - Re: [PATCH][v4] Modify loop device to be able to manage partitions of the disk image

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Message-ID: <47E19BC2.2030100@oracle.com>
Date:	Wed, 19 Mar 2008 16:03:30 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Laurent Vivier <Laurent.Vivier@...l.net>, jens.axboe@...cle.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH][v4]  Modify loop device to be able to manage partitions
 of the disk image

Andrew Morton wrote:
> On Wed, 19 Mar 2008 21:24:41 +0100
> Laurent Vivier <Laurent.Vivier@...l.net> wrote:
> 
>> Le mercredi 19 mars 2008 __ 13:11 -0700, Randy Dunlap a __crit :
>>> On Wed, 19 Mar 2008 13:36:07 +0100 Laurent Vivier wrote:
>>>
>>>> This patch allows to use loop device with partitionned disk image.
>>>>
>>>> Original behavior of loop is not modified.
>>>>
>>>> A new parameter is introduced to define how many partition we want to be
>>>> able to manage per loop device. This parameter is "max_part".
>>> What happened to the update to Documentation/kernel-parameters.txt
>>> that was in v3?
>> Well, perhaps I didn't understand the comment of Andrew:
>>
>> "This shouldn't be needed."
>>
>> I though it means I should remove it. So, Andrew ???

First of all, I didn't see Andrew's message until awhile after yours,
due to some kind of email problems...

> No, given that all module_param() options are available via the boot
> command line when the module is linked into vmlinux, we don't document them
> separately.

Thanks.  That's news to me.  Not that I mind the news.

> There should be a way of auto-generating all the documentation for all the
> module parameters from their MODULE_PARM_DESC's.  And there probably is,
> but I'm not sure how this is done (?)

No, nothing in tree like that.

Would such an auto-generator use source files or compiled modules?
Using the latter means that (a) something like allmodconfig must be done
and (b) it only works for the compiled $ARCH(es), whereas using source code
has neither of those "problems."

I can work on updating
http://www.xenotime.net/linux/scripts/module-params (from Oct-2006).
Comments welcome.


> (does `make help', fails to spot it).
> 
> You can do `modinfo loop' but that probably doesn't work if
> CONFIG_BLK_DEV_LOOP=y?


-- 
~Randy
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