linux-kernel - Re: lowmemory android driver not needed?

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Message-ID: <20090129220633.GA18603@elf.ucw.cz>
Date:	Thu, 29 Jan 2009 23:06:33 +0100
From:	Pavel Machek <pavel@...e.cz>
To:	Arve Hj?nnev?g <arve@...roid.com>
Cc:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Greg KH <greg@...ah.com>, Alan Cox <alan@...rguk.ukuu.org.uk>,
	Brian Swetland <swetland@...gle.com>, arve@...gle.com,
	San Mehat <san@...roid.com>, Robert Love <rlove@...gle.com>,
	linux-kernel@...r.kernel.org,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	Tony Lindgren <tony@...mide.com>,
	ext Juha Yrj?????? <juha.yrjola@...idboot.com>,
	viktor.rosendahl@...ia.com, Trilok Soni <soni.trilok@...il.com>
Subject: Re: lowmemory android driver not needed?

Hi!

> I never expected it to be merged. I wrote it to allow us to ship a product.
> 
> > The top problem is, this file stay on non proper place.
> > then, MM folks don't review at all.
> >
> > I think this patch need to receive MM folks review.
> 
> This patch solves two problems for us:
> 1. It gives us more control over which process gets killed when we run
> out of memory. This can easily be fixed in the regular oom killer
> instead.
> 2. It prevents the system from getting unusable due to excessive
> demand paging. Before we added the low memory killer, we had devices
> stuck for many minutes before the system managed to allocate enough
> memory for the oom killer to kick in.
> The second problem is the most critical and if it is solved, we will
> not need this patch.

Ok, maybe the best way forward is to create a "demo" that can be run
on desktop machine, where machine misbehaves (like becomes useless for
10 minutes before OOM killer kicks in), then draw attetion of
Andrew/Nick/etc?

									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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