linux-kernel - Re: UML fails to locate address space

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Date:	Tue, 20 May 2008 19:01:02 +0100
From:	"Tom Spink" <tspink@...il.com>
To:	"Jeff Dike" <jdike@...toit.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: UML fails to locate address space

2008/5/20 Jeff Dike <jdike@...toit.com>:
> On Tue, May 20, 2008 at 05:43:17PM +0100, Tom Spink wrote:
>> I suspected this type of foul-play, and tried altering bottom to 1,
>> but this didn't work.  So, I took out the page_ok test, and it
>> continued booting.  So I went back, put the test back in and
>> incremented bottom until I got to 16.  It worked at 16. :-)
>
> Heh, I guess they were also worried about up to 64K offsets off a NULL
> pointer too.

<g>

>
>> Is this something that can be fixed, or would a config option be
>> appropriate?
>
> This was done in order to remove config options.  It might be
> reasonable to effectively do what you did, and search for the lowest
> address at which mmap works and start from there.

Cool, and nice work BTW.  I just for-looped up the way, from 0.

>
>> I am willing to blame Ubuntu, but unfortunately, I can't find an
>> online resource of their patches.
>
> https://wiki.ubuntu.com/KernelGitGuide lists a bunch of git repos.
> Tell me which one applies to you and I'll take a look.
>

I'm a hardy.  I bet it's 893f802872c3.

http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-hardy.git;a=commitdiff;h=893f802872c3e3c6e4bb40c3be4845784b81b934

>                  Jeff

-- 
Tom Spink
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