linux-kernel - Re: [RFC] Reproducible OOM with partial workaround

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Message-ID: <50F037F2.8040301@linux.vnet.ibm.com>
Date:	Fri, 11 Jan 2013 08:04:02 -0800
From:	Dave Hansen <dave@...ux.vnet.ibm.com>
To:	paul.szabo@...ney.edu.au
CC:	695182@...s.debian.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [RFC] Reproducible OOM with partial workaround

On 01/10/2013 05:46 PM, paul.szabo@...ney.edu.au wrote:
>> > ... I don't believe 64GB of RAM has _ever_ been booted on a 32-bit
>> > kernel without either violating the ABI (3GB/1GB split) or doing
>> > something that never got merged upstream ...
> Sorry to be so contradictory:
> 
> psz@...o:~$ uname -a
> Linux como.maths.usyd.edu.au 3.2.32-pk06.10-t01-i386 #1 SMP Sat Jan 5 18:34:25 EST 2013 i686 GNU/Linux
> psz@...o:~$ free -l
>              total       used       free     shared    buffers     cached
> Mem:      64446900    4729292   59717608          0      15972     480520
> Low:        375836     304400      71436
> High:     64071064    4424892   59646172
> -/+ buffers/cache:    4232800   60214100
> Swap:    134217724          0  134217724

Hey, that's pretty cool!  I would swear that the mem_map[] overhead was
such that they wouldn't boot, but perhaps those brain cells died on me.



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