linux-kernel - [RFC][PATCH 0/5] PM/Hibernate: Rework memory shrinking (rev. 2)

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Message-Id: <200905072348.59856.rjw@sisk.pl>
Date:	Thu, 7 May 2009 23:48:58 +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>,
	David Rientjes <rientjes@...gle.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: [RFC][PATCH 0/5] PM/Hibernate: Rework memory shrinking (rev. 2)

On Thursday 07 May 2009, Rafael J. Wysocki wrote:
> 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.

Updated patchset follows.

Most importantly, the first patch has been replaced by the one adding
__GFP_NO_OOM_KILL, following the Andrew's advice.  The other patches are
slightly changed to address some comments I've received since yesterday.

Please tell me what you think.

Best,
Rafael

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