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From: Paul Hartman <paul.hartman+gentoo@gmail.com>
Date: Wed, 2 May 2012 15:33:59 -0500
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Subject: Re: [gentoo-user] Any experience with swapfiles?
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On Wed, May 2, 2012 at 3:31 PM, Paul Hartman
<paul.hartman+gentoo@gmail.com> wrote:
> On Wed, May 2, 2012 at 1:53 PM, walt <w41ter@gmail.com> wrote:
>> I have two machines with 4GB of ram and I've never seen either one use
>> swapspace (yet) so I'm thinking I could delete my swap partitions and
>> substitute a much smaller swapfile -- if it's safe.
>>
>> Any downside to using a swap file instead of a swap partition, maybe
>> depending on which filesystem you use, or something? =A0Security holes?
>> Any horror stories out there?
>
> I think a swapfile cannot be used for suspend-to-disk. When creating a
> swap file you should take care to ensure it is not fragmented.
> Otherwise, performance should be equal between swap partition or swap
> file under normal circumstances, as far as I know.

And I will add: be sure the swapfile you create is not a sparse file!