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

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Date:	Tue, 3 Feb 2009 23:08:35 +0900
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Pavel Machek <pavel@...e.cz>
Cc:	"Arve Hj?nnev?g" <arve@...roid.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!

2009/1/30 Pavel Machek <pavel@...e.cz>:
> 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,

good idea! :)


> where machine misbehaves (like becomes useless for
> 10 minutes before OOM killer kicks in), then draw attetion of
> Andrew/Nick/etc?
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