linux-kernel - Re: [linux-pm] [RFC][PATCH] PM: Force GFP_NOIO during suspend/resume (was: Re: Memory allocations in .suspend became very unreliable)

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Date:	Fri, 22 Jan 2010 07:42:25 +1100
From:	Nigel Cunningham <ncunningham@...a.org.au>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	linux-pm@...ts.linux-foundation.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [linux-pm] [RFC][PATCH] PM: Force GFP_NOIO during	suspend/resume
 (was: Re: Memory allocations in .suspend	became very unreliable)

Hi.

Rafael J. Wysocki wrote:
> On Thursday 21 January 2010, KOSAKI Motohiro wrote:
>>  - Ask all drivers how much they require memory before starting suspend and
>>    Make enough free memory at first?
> 
> That's equivalent to reworking all drivers to allocate memory before suspend
> eg. with the help of PM notifiers.  Which IMHO is unrealistic.

What's unrealistic about it? I can see that it would be a lot of work,
but unrealistic? To me, at this stage, it sounds like the ideal solution.

Regards,

Nigel
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