Re: iwl3945: order 5 allocation during ifconfig up; vm problem?
From: Johannes Berg
Date: Wed Sep 12 2012 - 02:54:13 EST
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()
> > It seems some sections of /lib/firmware/iwlwifi*.ucode files are above
> > 128 Kbytes, so dma_alloc_coherent() try order-5 allocations
> Thanks for looping me in, yes, this looks very familiar to me :)
> In the other thread, Johannes Berg gave me this patch which is supposed to
> help: http://p.sipsolutions.net/11ea33b376a5bac5.txt
Yes, but that patch won't apply to iwlegacy as is. However, I'm pretty
sure that it should be possible to solve the issue in the same way in
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