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Date: Mon, 24 Sep 2012 12:03:53 +0300
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: Marc MERLIN <marc@merlins.org>,
	Eric Dumazet <eric.dumazet@gmail.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Pavel Machek <pavel@ucw.cz>,
	David Rientjes <rientjes@google.com>, sgruszka@redhat.com,
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	Mel Gorman <mgorman@suse.de>, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org
Subject: Re: iwl3945: order 5 allocation during ifconfig up; vm problem?
Message-ID: <20120924090353.GA5368@mwanda> (sfid-20120924_110452_694937_FD2B2F7E)
References: <20120909213228.GA5538@elf.ucw.cz>
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 <20120910111113.GA25159@elf.ucw.cz>
 <20120911162536.bd5171a1.akpm@linux-foundation.org>
 <1347426988.13103.684.camel@edumazet-glaptop>
 <20120912055712.GE11613@merlins.org>
 <1347432846.4293.0.camel@jlt4.sipsolutions.net>
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On Wed, Sep 12, 2012 at 08:54:06AM +0200, Johannes Berg wrote:
> On Tue, 2012-09-11 at 22:57 -0700, Marc MERLIN wrote:
> > On Wed, Sep 12, 2012 at 07:16:28AM +0200, Eric Dumazet wrote:
> > > On Tue, 2012-09-11 at 16:25 -0700, Andrew Morton wrote:
> > > 
> > > > Asking for a 256k allocation is pretty crazy - this is an operating
> > > > system kernel, not a userspace application.
> > > > 
> > > > I'm wondering if this is due to a recent change, but I'm having trouble
> > > > working out where the allocation call site is.
> > > > --
> > > 
> > > (Adding Marc Merlin to CC, since he reported same problem)
> > > 
> > > Thats the firmware loading in iwlwifi driver. Not sure if it can use SG.
> > > 
> > > drivers/net/wireless/iwlwifi/iwl-drv.c
> > > 
> > > iwl_alloc_ucode() -> iwl_alloc_fw_desc() -> dma_alloc_coherent()

I'm filing bugzilla entries for regressions.  What's the status on
this?

regards,
dan carpenter