linux-kernel - Re: iwl3945: order 5 allocation during ifconfig up; vm problem?

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Date:	Mon, 10 Sep 2012 13:11:13 +0200
From:	Pavel Machek <pavel@....cz>
To:	David Rientjes <rientjes@...gle.com>
Cc:	sgruszka@...hat.com, linux-wireless@...r.kernel.org,
	johannes.berg@...el.com, wey-yi.w.guy@...el.com,
	ilw@...ux.intel.com, Andrew Morton <akpm@...l.org>,
	Mel Gorman <mgorman@...e.de>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: iwl3945: order 5 allocation during ifconfig up; vm problem?

On Sun 2012-09-09 15:40:55, David Rientjes wrote:
> On Sun, 9 Sep 2012, Pavel Machek wrote:
> 
> > On 3.6.0-rc2+, I tried to turn on the wireless, but got
> > 
> > root@amd:~# ifconfig wlan0 10.0.0.6 up
> > SIOCSIFFLAGS: Cannot allocate memory
> > SIOCSIFFLAGS: Cannot allocate memory
> > root@amd:~# 
> > 
> > It looks like it uses "a bit too big" allocations to allocate
> > firmware...? Order five allocation....
> > 
> > Hmm... then I did "echo 3  > /proc/sys/vm/drop_caches" and now the
> > network works. Is it VM problem that it failed to allocate memory when
> > it was freeable?
> > 
> 
> Do you have CONFIG_COMPACTION enabled?

Yes:

pavel@amd:/data/l/linux-good$ zgrep CONFIG_COMPACTION /proc/config.gz 
CONFIG_COMPACTION=y
								Pavel

-- 
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