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