linux-kernel - Re: free_initrd_mem() corrups mm state on m68knommu.

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Message-ID: <20090918162836.GI23702@csclub.uwaterloo.ca>
Date:	Fri, 18 Sep 2009 12:28:36 -0400
From:	lsorense@...lub.uwaterloo.ca (Lennart Sorensen)
To:	Greg Ungerer <gerg@...pgear.com>
Cc:	linux-kernel@...r.kernel.org, Greg Ungerer <gerg@...inux.org>,
	uclinux-dev@...inux.org
Subject: Re: free_initrd_mem() corrups mm state on m68knommu.

On Fri, Sep 18, 2009 at 09:42:59AM +1000, Greg Ungerer wrote:
> Hi Lennart,
>
> Lennart Sorensen wrote:
>> On Thu, Sep 17, 2009 at 05:34:37PM +1000, Greg Ungerer wrote:
>>> Hi Lennart,
>>>
>>> Lennart Sorensen wrote:
>>>> On Tue, Sep 15, 2009 at 05:49:59PM -0400, Lennart Sorensen wrote:
> ...
>>>> OK, seems the issue was that setup.c wasn't flagging the initrd memory
>>>> range as 'reserve_bootmem' which caused extra memory to be forced into
>>>> the mm state when it was later freed.  I guess one has to be very careful
>>>> with what patches one finds lying around the internet (in this case the
>>>> uboot bootargs patch for m68knommu that we found somewhere).
>>>>
>>>> Seems to work great now, and I finally made sense of how the bootmem
>>>> map is passed and what is going where.  It all makes sense now.
>>> Can you send a patch for it?
>>> I can push it to mainline of it looks reasonable.
>>
>> Well it's a patch ontop of another patch that isn't in mainline.
>> The other patch is one that adds support for uboot passing kernel command
>> line arguments.  Want that one too?  We find it to be rather useful.
>
> Sure, send them both.

I just sent it.

-- 
Len Sorensen
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