linux-kernel - Re: Problem: Out of memory after 2days with 2GB RAM

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Date:	Thu, 12 Jun 2008 17:43:57 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Zdenek Kabelac" <zdenek.kabelac@...il.com>
Cc:	johannes@...solutions.net, tomasw@...il.com, riel@...hat.com,
	linux-kernel@...r.kernel.org, yi.zhu@...el.com,
	reinette.chatre@...el.com, linux-wireless@...r.kernel.org
Subject: Re: Problem: Out of memory after 2days with 2GB RAM

On Thu, 12 Jun 2008 22:11:32 +0200
"Zdenek Kabelac" <zdenek.kabelac@...il.com> wrote:

> Well - it's great that there will be saved few kB in allocation of
> never used pointers in iwl driver - but does this really solve the
> problem that kernel gets relatively quickly out of memory for
> allocations of this size - I guess iwl isn't the only driver
> requesting 32 sequential pages.

I hope it is the only one.  Doing a 128kb GFP_ATOMIC allocation is
hopelessly unreliable.  Even a 128k GFP_KERNEL allocation will fail all
over the place.

Please convert the driver to allocate no more than 4k at a time.
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