Re: 2.6.9 RCU breakage in dev_queue_xmit

[Jeff V. Merkey]

Patrick McHardy wrote:

> Jeff V. Merkey wrote:
>
> > Running dual gigabit interfaces at 196 MB/S (megabytes/second) on 
> > receive, 12 CLK interacket gap time, 1500 bytes payload
> > at 65000 packets per second per gigabit interface, and retransmitting 
> > received packets at 130 MB/S out of a third gigabit interface
> > with skb, RCU locks in dev_queue_xmit breaks and enters the following 
> > state:
> >
> > Nov  8 15:38:08 ds kernel: Badness in local_bh_enable at 
> > kernel/softirq.c:141
> > Nov  8 15:38:08 ds kernel:  [<40107d1e>] dump_stack+0x1e/0x30
> > Nov  8 15:38:08 ds kernel:  [<401218b0>] local_bh_enable+0x70/0x80
> > Nov  8 15:38:08 ds kernel:  [<402c5bbb>] dev_queue_xmit+0x11b/0x250
> > Nov  8 15:38:08 ds kernel:  [<f8981cb7>] xmit_skb+0x17/0x20 [dsfs]
> > Nov  8 15:38:08 ds kernel:  [<f8981f8e>] xmit_packet+0x2e/0x80 [dsfs]
> > Nov  8 15:38:08 ds kernel:  [<f89820eb>] regen_data+0x10b/0x290 [dsfs]
>
>
> There is no such function in the 2.6.9 kernel.


Check /include/linux for local_bh_enable and /net/core/dev.c .

Jeff

> Regards
> Patrick
>
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