Hi Joerg,

On 7/2/2015 2:52 PM, Joerg Roedel wrote:
Hi Jin,

On Thu, Jul 02, 2015 at 12:24:34PM +0800, xiao jin wrote:
[  106.107851] BUG: unable to handle kernel NULL pointer dereference at 
0000000000000040
[  106.116702] IP:
[  106.118490]  [<ffffffff810044f6>] 
check_irq_vectors_for_cpu_disable+0x76/0x180
This might be the same issue I fixed with:

        d97eb8966c91 x86/irq: Check for valid irq descriptor in 
check_irq_vectors_for_cpu_disable()

Can you try whether applying this patch on your kernel fixes your
issue?

Yes, I agree d97eb8966c91 fix the IPANIC. I just notice a description from http://lkml.kernel.org/r/20150204132754.ga10...@suse.de.

I wish to share the debug result and root cause from my side.

Thanks,

        Joerg


Thanks.
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