linux-kernel - [RFC][PATCH 0/5] PM/Hibernate: Rework memory shrinking

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Date:	Thu, 7 May 2009 00:40:07 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	pm list <linux-pm@...ts.linux-foundation.org>
Cc:	Wu Fengguang <fengguang.wu@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, Pavel Machek <pavel@....cz>,
	Nigel Cunningham <nigel@...onice.net>
Subject: [RFC][PATCH 0/5] PM/Hibernate: Rework memory shrinking

Hi,

The following patchset is an attempt to rework the memory shrinking mechanism
used during hibernation to make room for the image.  It is a work in progress
and most likely it's going to be modified, but it has been discussed recently
and I'd like to get comments on the current version.

[1/5] - disable the OOM kernel after freezing tasks (this will be dropped if
        it's verified that we can avoid the OOM killing by using
        __GFP_FS|__GFP_WAIT|__GFP_NORETRY|__GFP_NOWARN
        in the next patches).

[2/5] - drop memory shrinking from the suspend (to RAM) code path

[3/5] - move swsusp_shrink_memory() to snapshot.c

[4/5] - rework swsusp_shrink_memory() (to use memory allocations for applying
        memory pressure)

[5/5] - allocate image pages along with the shrinking.

Details are in the changelogs, please have a look and tell me what you think.

Best,
Rafael



-- 
Everyone knows that debugging is twice as hard as writing a program
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