[Bug 404575] Re: iwlagn creates cpu hog

[radioboy]

Same problem here, on a Dell 1535 notebook, with Linux Mint 8 (x64) using Ubuntu backports repository.
The wireless device is Intel Wireless WiFi link 5100.

Right now I'm using cable connection to internet, and top reports iwlagn being active for 1009 minutes. Uptime is 1698 minutes.
CPU 99-100%, memory 0.0%. It's only using one of the dual core processors.
The hog started no more than a 10-15 minutes ago, as far as I can tell.


$ dmesg |grep iwlagn
[40592.432763] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40611.061646]  [<ffffffffa05064ba>] iwl_rx_handle+0x24a/0x2f0 [iwlagn]
[40611.061662]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40611.071228] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40611.071228]  [<ffffffffa05064f8>] iwl_rx_handle+0x288/0x2f0 [iwlagn]
[40611.071228]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40611.071228] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40612.234893]  [<ffffffffa05064ba>] iwl_rx_handle+0x24a/0x2f0 [iwlagn]
[40612.234909]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40612.244510] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40612.244510]  [<ffffffffa05064f8>] iwl_rx_handle+0x288/0x2f0 [iwlagn]
[40612.244510]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40612.244510] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40613.210416]  [<ffffffffa05064ba>] iwl_rx_handle+0x24a/0x2f0 [iwlagn]
[40613.210432]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40613.213449] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40613.213449]  [<ffffffffa05064f8>] iwl_rx_handle+0x288/0x2f0 [iwlagn]
[40613.213449]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40613.213449] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40614.543052]  [<ffffffffa05064ba>] iwl_rx_handle+0x24a/0x2f0 [iwlagn]
[40614.543060]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40614.552836] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40614.552836]  [<ffffffffa05064f8>] iwl_rx_handle+0x288/0x2f0 [iwlagn]
[40614.552836]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40614.552836] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40615.565580]  [<ffffffffa05064ba>] iwl_rx_handle+0x24a/0x2f0 [iwlagn]
[40615.565596]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40615.572506] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40615.572506]  [<ffffffffa05064f8>] iwl_rx_handle+0x288/0x2f0 [iwlagn]
[40615.572506]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40615.572506] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40616.386429]  [<ffffffffa05064ba>] iwl_rx_handle+0x24a/0x2f0 [iwlagn]
[40616.386445]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40616.394946] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40616.394946]  [<ffffffffa05064f8>] iwl_rx_handle+0x288/0x2f0 [iwlagn]
[40616.394946]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40616.394946] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40618.686255]  [<ffffffffa05064ba>] iwl_rx_handle+0x24a/0x2f0 [iwlagn]
[40618.686271]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40618.695821] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40618.695821]  [<ffffffffa05064f8>] iwl_rx_handle+0x288/0x2f0 [iwlagn]
[40618.695821]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40618.695821] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40620.119606]  [<ffffffffa05064ba>] iwl_rx_handle+0x24a/0x2f0 [iwlagn]
[40620.119623]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40620.145460] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40620.145460]  [<ffffffffa05064f8>] iwl_rx_handle+0x288/0x2f0 [iwlagn]
[40620.145460]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40620.145460] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40620.892018]  [<ffffffffa05064ba>] iwl_rx_handle+0x24a/0x2f0 [iwlagn]
[40620.892034]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40620.901655] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40620.901655]  [<ffffffffa05064f8>] iwl_rx_handle+0x288/0x2f0 [iwlagn]
[40620.901655]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40620.901655] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40621.916022]  [<ffffffffa05064ba>] iwl_rx_handle+0x24a/0x2f0 [iwlagn]
[40621.916038]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40621.933443] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40621.933443]  [<ffffffffa05064f8>] iwl_rx_handle+0x288/0x2f0 [iwlagn]
[40621.933443]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40621.963387] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40622.701720]  [<ffffffffa05064ba>] iwl_rx_handle+0x24a/0x2f0 [iwlagn]
[40622.701736]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40622.711380] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40622.711380]  [<ffffffffa05064f8>] iwl_rx_handle+0x288/0x2f0 [iwlagn]
[40622.711380]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40622.711380] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40623.498796]  [<ffffffffa05064ba>] iwl_rx_handle+0x24a/0x2f0 [iwlagn]
[40623.498812]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40623.508451] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40623.508451]  [<ffffffffa05064f8>] iwl_rx_handle+0x288/0x2f0 [iwlagn]
[40623.508451]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40623.508451] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40624.372023]  [<ffffffffa05064ba>] iwl_rx_handle+0x24a/0x2f0 [iwlagn]
[40624.372039]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40624.394366] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40624.394366]  [<ffffffffa05064f8>] iwl_rx_handle+0x288/0x2f0 [iwlagn]
[40624.394366]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40624.394366] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40625.261683]  [<ffffffffa05064ba>] iwl_rx_handle+0x24a/0x2f0 [iwlagn]
[40625.261699]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40625.271355] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40625.271355]  [<ffffffffa05064f8>] iwl_rx_handle+0x288/0x2f0 [iwlagn]
[40625.271355]  [<ffffffffa0506ad8>] iwl_irq_tasklet+0x138/0x480 [iwlagn]
[40625.271355] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40626.011796] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40626.011826] iwlagn 0000:04:00.0: Can not allocate SKB buffers
[40627.799572]  [<ffffffffa05064ba>] iwl_rx_handle+0x24a/0x2f0 [iwlagn]
(etc)

-- 
iwlagn creates cpu hog
https://bugs.launchpad.net/bugs/404575
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