linux-kernel - Re: [PATCH 1/5] mm: Add __GFP_NO_OOM

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Message-ID: <20090507203518.GA1652@ucw.cz>
Date:	Thu, 7 May 2009 22:35:18 +0200
From:	Pavel Machek <pavel@....cz>
To:	David Rientjes <rientjes@...gle.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	fengguang.wu@...el.com, linux-pm@...ts.linux-foundation.org,
	torvalds@...ux-foundation.org, jens.axboe@...cle.com,
	alan-jenkins@...fmail.co.uk, linux-kernel@...r.kernel.org,
	kernel-testers@...r.kernel.org
Subject: Re: [PATCH 1/5] mm: Add __GFP_NO_OOM_KILL flag

On Thu 2009-05-07 13:25:06, David Rientjes wrote:
> On Thu, 7 May 2009, Rafael J. Wysocki wrote:
> 
> > OK, let's try with __GFP_NO_OOM_KILL first.  If there's too much disagreement,
> > I'll use the freezer-based approach instead.
> > 
> 
> Third time I'm going to suggest this, and I'd like a response on why it's 
> not possible instead of being ignored.
> 
> All of your tasks are in D state other than kthreads, right?  That means 
> they won't be in the oom killer (thus no zones are oom locked), so you can 
> easily do this

Well, OOM killer may be running on behalf of some kthread at that
point....? Quite unlikely, but possible AFAICT.
									Pavel

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