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Date: Fri, 13 Jul 2007 02:20:39 -0400
To: david@lang.hm
Cc: Joseph Fannin <jfannin@gmail.com>, "Rafael J. Wysocki" <rjw@sisk.pl>,
       "Huang, Ying" <ying.huang@intel.com>,
       Andrew Morton <akpm@linux-foundation.org>, Pavel Machek <pavel@ucw.cz>,
       nigel@nigel.suspend2.net, Jeremy Maitin-Shepard <jbms@cmu.edu>,
       linux-kernel@vger.kernel.org, linux-pm@lists.linux-foundation.org
Subject: Re: Hibernating To Swap Considered Harmful
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From: jfannin@gmail.com (Joseph Fannin)
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On Thu, Jul 12, 2007 at 10:57:04PM -0700, david@lang.hm wrote:
> On Fri, 13 Jul 2007, Joseph Fannin wrote:
>
> the only justification I have heard for why the hibernate image must be
> written to the swap partition is backwards compatibility (i.e., we've
> always done it that way)
>
> if you are going to reserve disk space for hibernation, what is so bad
> about useing a normal partition?
>
    You have to either repartition when you upgrade your memory, or
waste a bunch of disk space with a partition as large as you think
your RAM might ever expand to.

    Swap/hibernate files can be created, deleted, and resized without
partitioning.

    Also: not all platforms support a large number of partitions.
It's not academic -- Intel Macintoshes are limited to four, with two
taken by Mac OS.  Add Windows and a Linux /, and you're out --
there's no room for a swap file.

--
Joseph Fannin
jfannin@gmail.com