2.6.16-rt17, hang with skge network driver

2.6.16-rt17, hang with skge network driver

[Fernando Lopez-Lezcano]

Hi Ingo, I've seen a few hangs with 2.6.16-rt17 - my feeling was that
they had to do with high network load - and this time something was left
behind after the reboot (I have to set up a serial console, it is not
happening very frequently). Most probably this does not say much but
here it goes anyway:

May  8 17:46:14 cmn3 kernel: softirq-net-tx//16[CPU#1]: BUG in
dma_map_single at include/asm/dma-mapping.h:26
May  8 17:46:14 cmn3 kernel:  [<c0123b95>] __WARN_ON+0x42/0x55 (8)
May  8 17:46:14 cmn3 kernel:  [<c01282d3>] ksoftirqd+0x0/0x188 (44)
May  8 17:46:14 cmn3 kernel:  [<f88ec916>] skge_xmit_frame+0xe9/0x2bc
[skge] (4)
May  8 17:46:14 cmn3 kernel:  [<c01282d3>] ksoftirqd+0x0/0x188 (56)
May  8 17:46:14 cmn3 kernel:  [<c02ad1f4>] qdisc_restart+0x92/0x1f0 (4)
May  8 17:46:14 cmn3 kernel:  [<c01282d3>] ksoftirqd+0x0/0x188 (20)
May  8 17:46:14 cmn3 kernel:  [<c029f357>] net_tx_action+0x9a/0xb3 (4)
May  8 17:46:14 cmn3 kernel:  [<c01283ac>] ksoftirqd+0xd9/0x188 (16)
May  8 17:46:14 cmn3 kernel:  [<c0134495>] kthread+0x9d/0xcc (20)
May  8 17:46:14 cmn3 kernel:  [<c01343f8>] kthread+0x0/0xcc (12)
May  8 17:46:14 cmn3 kernel:  [<c0102005>] kernel_thread_helper+0x5/0xb
(16)
May  8 17:48:33 cmn3 syslogd 1.4.1: restart.

-- Fernando

RE: 2.6.16-rt17, hang with skge network driver

[Fortier,Vincent [Montreal]]

> Hi Ingo, I've seen a few hangs with 2.6.16-rt17 - my feeling 
> was that they had to do with high network load - and this 
> time something was left behind after the reboot (I have to 
> set up a serial console, it is not happening very 
> frequently). Most probably this does not say much but here it 
> goes anyway:

I've switch from sk98lin to skge this morning using 2.6.17-rc3-git17
since the sk98lin driver simply drops my connection after a little while
and also has a lot of problem enbling the connection with my linksys
(although it`s linux also).  

Suprisingly my PC frozed about an hour after the driver switch?  Maybie
it is not a problem with the real-time patch of Ingo since I'm not using
it?

- vin