Re: [Xen-users] Badness in softirq.c / no modules loaded / related tonetwork interface

[Andy Smith <andy@xxxxxxxxxxxxxx>]

On Mon, May 30, 2005 at 02:36:01AM +0100, Steven Hand wrote:
> Error path seems to be: 
> 
> udp_poll():1334 does spin_lock_irq() which disables interrupts (__cli()) 
> then line 1336 does udp_checksum_complete() which calls skb_checksum() 
> which calls local_bh_enable() which barfs if irqs are disabled. 
> 
> This only happens under CONFIG_HIGHMEM. 
> 
> However - at first look this seems like it should happen under vanilla
> linux too ... so I may be missing something. Will take a more detailed 
> look....
> 
> In the meantime you could try to see if you can reproduce w/out 
> CONFIG_HIGHMEM...

I will give that a go at some point, thank you.

> p.s. what is the app that's doing UDP polling? may be able to 
>      reproduce locally which would help...

Aside from the ping results I reported earlier, heavy accesses to
the snmpd in dom0 produces it too.

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