Re: Kernel crash in 2.6.0-test9-mm3

[Reuben Farrelly <reuben-linux@xxxxxxxx>]

The system is a UP system..

# CONFIG_SMP is not set
CONFIG_PREEMPT=y
CONFIG_X86_UP_APIC=y
CONFIG_X86_UP_IOAPIC=y
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
CONFIG_X86_TSC=y
CONFIG_X86_MCE=y

I've put the full .config up at http://www.reub.net/linux/

Reuben



At 15:22 19/11/2003, Krishna Kumar wrote:
> Could this be happening on an SMP system only ? If so, e100intr routine
> services tx queues (e100_tx_srv)
> without holding a lock. Can't multiple rx interrupts be scheduled on
> different cpus at the same time, and
> each execute dev_kfree_skb_irq() which decrements the ref count too many
> times ? But the softirq handler
> (net_tx_action) seems to clean up the skb once as the dec_test returns 1
> only if count is zero, so I don't see
> where the dst ref is being decremented wrongly in this case.