Re: 2.6.9 RCU breakage in dev_queue_xmit

From: Stephen Hemminger
Date: Tue Nov 09 2004 - 13:37:50 EST


On Tue, 09 Nov 2004 11:40:26 -0700
"Jeff V. Merkey" <jmerkey@xxxxxxxxx> wrote:

> 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

Patrick is asking about the function regen_data which doesn't exist in the
standard kernel.
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