Re: [Xen-devel] Linux 4.8-rc8 with Xen for-linus-4.9 branch: dom0 crashes on boot

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

On 10/02/2016 08:50 AM, Sander Eikelenboom wrote:
>
>>> Sure thing:
>>> addr2line -e vmlinux-4.8.0-rc8-20161002-linus-xennext+ ffffffff8101fdb9
>>> /usr/src/new/linux-linus/arch/x86/xen/irq.c:34
>>>
>>> asmlinkage __visible unsigned long xen_save_fl(void)
>>> {
>>>         struct vcpu_info *vcpu;
>>>         unsigned long flags;
>>>
>>>         vcpu = this_cpu_read(xen_vcpu);
>>>
>>>         /* flag has opposite sense of mask */
>>>         flags = !vcpu->evtchn_upcall_mask;   <== WHICH IS HERE
>>>
>>>         /* convert to IF type flag
>>>            -0 -> 0x00000000
>>>            -1 -> 0xffffffff
>>>         */
>>>         return (-flags) & X86_EFLAGS_IF;
>>> }
>>
>>
>> Can you post your .config file?
>>
>> Our tests seem to have run fine yesterday with those branches, until
>> apparently electrical problem shut down the whole test farm this
>> morning.
>>
>> -boris
>
> Sure, it's attached.


I can reproduce this and will send a patch soon.

-boris


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