On Tue, 2013-02-19 at 11:03 +0100, Johannes Berg wrote:

On Mon, 2013-02-18 at 21:17 -0800, Eric Dumazet wrote:

quoted

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chrome: page allocation failure: order:1, mode:0x4020
Pid: 8730, comm: chrome Tainted: G           O 3.7.8-amd64-preempt-20121226-fixwd #1
Call Trace:
 <IRQ>  [<ffffffff810d5f38>] warn_alloc_failed+0x117/0x12c

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You could try to load iwlwifi with amsdu_size_8K set to 0 (disable)

It should hopefully use order-0 pages

It will, do that then, unfortunately it can't switch at runtime because
it advertised this support to the access point or clients.

What are the drawbacks of setting amsdu_size_8K to 0 by default ?

Alternative would be :

- As long as we cant allocate order-1 pages (to refill the RX ring),
copy incoming frames into order-0 pages, so that order-1 pages are still
available for the NIC.