linux-kernel - Re: Hibernating To Swap Considered Harmful

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Date:	Tue, 17 Jul 2007 07:44:07 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	Joseph Fannin <jfannin@...il.com>
Cc:	Jeremy Maitin-Shepard <jbms@....edu>, david@...g.hm,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Huang, Ying" <ying.huang@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Pavel Machek <pavel@....cz>, nigel@...el.suspend2.net,
	linux-kernel@...r.kernel.org, linux-pm@...ts.linux-foundation.org
Subject: Re: Hibernating To Swap Considered Harmful

Am Dienstag 17 Juli 2007 schrieb Joseph Fannin:
> Why are all these workarounds preferred, instead of proper suspend
> support for swap files?
> 
> IOW, what reasons are there to *not* support swap files, other than the
> hit-and-miss Linux suspend support?

If yoi want to go the kexec route to hibernation, the dumping kernel
would need to mount the filesystem to write to a file. Therefore the
suspending kernel would need to sync to disk and lock that file.

	Regards
		Oliver

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