linux-kernel - Re: [problem?] swapon: swap partition/volume size capped at 32G?

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Message-ID: <1372961710.16288.1.camel@warfang>
Date:	Thu, 04 Jul 2013 11:15:10 -0700
From:	Raymond Jennings <shentino@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Re: [problem?] swapon: swap partition/volume size capped at 32G?

On Wed, 2013-07-03 at 14:21 -0700, Raymond Jennings wrote:
> Ok, so I just upgraded to 3.10.0 (gentoo system) and made a nice big
> 64GiB swap volume on lvm as usual.
> 
> Suddenly, swapon doesn't recognize more than 32GiB, as top lists only
> that much swap space.
> 
> swapon using *two* separate 32GiB partitions works fine, but for some
> reason a swap partition bigger than 32GiB isn't fully recognized.
> 
> Previous kernel versions IIRC recognized the entire swap partition.
> 
> Is something wrong or is this new behavior standard?
> 
Hold on a minute, I just found out something ate my kernel config and
turned off PAE when I upgraded.

This in turn shrunk my pte's from 64 bits to 32 bits and is probably
what killed >32G swap extents.


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