Re: 3.2.8/amd64 full interrupt hangs and deadlocks under big network copies (page allocation failure)

David Miller
2012-04-09T19:35:08Z

From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Mon, 09 Apr 2012 21:11:12 +0200

> I think Marc posted stack traces showing problem on transmit side.
...
> I dont really understand how it can happen, with MTU=1500

Depending upon the configuration and the driver, wireless can need
more headroom. For encryption an extra 8 bytes are necessary, and the
driver may request a variable amount of extra headroom via
->hw.extra_tx_headroom

What wireless device are we dealing with again?