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

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Message-ID: <20120924090353.GA5368@mwanda>
Date:	Mon, 24 Sep 2012 12:03:53 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	Marc MERLIN <marc@...lins.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Pavel Machek <pavel@....cz>,
	David Rientjes <rientjes@...gle.com>, sgruszka@...hat.com,
	linux-wireless@...r.kernel.org, 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 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

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