netdev - Re: [2.6.30-git21] Network Namespace test failure

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Message-ID: <20090624140056.GA11912@us.ibm.com>
Date:	Wed, 24 Jun 2009 09:00:56 -0500
From:	"Serge E. Hallyn" <serue@...ibm.com>
To:	Sachin Sant <sachinp@...ibm.com>
Cc:	netdev <netdev@...r.kernel.org>, serue@...ux.vnet.ibm.com,
	David Miller <davem@...emloft.net>, matthltc@...ibm.com
Subject: Re: [2.6.30-git21] Network Namespace test failure

Quoting Sachin Sant (sachinp@...ibm.com):
> While executing Newtork namespace tests from LTP[1] May release,
> the machine crashed with following o/p. This is a PowerPC
> blade(Power 6)

...

> The corresponding c code (veth_xmit) is:
>
> 9cc:   3b 44 06 00     addi    r26,r4,1536
>
>        cpu = smp_processor_id();
>        stats = per_cpu_ptr(priv->stats, cpu);
> 9d0:   79 6b 1f 24     rldicr  r11,r11,3,60
> 9d4:   7d 4a 50 f8     not     r10,r10
>        rcv_stats = per_cpu_ptr(rcv_priv->stats, cpu);
> 9d8:   e9 3a 00 08     ld      r9,8(r26)
>        priv = netdev_priv(dev);
>        rcv = priv->peer;
>        rcv_priv = netdev_priv(rcv);
>
>        cpu = smp_processor_id();
>        stats = per_cpu_ptr(priv->stats, cpu);
> 9dc:   7f 8b 50 2a     ldx     r28,r11,r10
>        rcv_stats = per_cpu_ptr(rcv_priv->stats, cpu);
> ^^^^^ PC points to this instruction ^^^^^
>
> I haven't tried these tests earlier so not sure if this
> is a new problem or not. Let me know if there is any
> other information you would like.

Precise kernel version and .config?

thanks,
-serge
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