Re: [Xen-devel] [xen-unstable test] 113562: regressions - FAIL

[George Dunlap <george.dunlap@xxxxxxxxxx>]

On 09/18/2017 11:15 AM, George Dunlap wrote:
> On 09/18/2017 10:45 AM, Roger Pau Monné wrote:
>> On Mon, Sep 18, 2017 at 10:37:58AM +0100, Wei Liu wrote:
>>> On Mon, Sep 18, 2017 at 08:36:03AM +0000, osstest service owner wrote:
>>>> flight 113562 xen-unstable real [real]
>>>> http://logs.test-lab.xenproject.org/osstest/logs/113562/
>>>>
>>>> Regressions :-(
>>>>
>>>> Tests which did not succeed and are blocking,
>>>> including tests which could not be run:
>>>>  test-amd64-amd64-xl-credit2  15 guest-saverestore        fail REGR. vs. 
>>>> 113387
>>>
>>> There appears to be a bug:
>>>
>>> http://logs.test-lab.xenproject.org/osstest/logs/113562/test-amd64-amd64-xl-credit2/serial-godello0.log
>>>
>>> Sep 18 01:14:28.803062 (XEN) Xen BUG at spinlock.c:47
>>
>> Seem to be caused because budget_lock is sometimes locked with irqsave
>> while others not.
> 
> Just wondering where you're getting the budget lock from?  The call
> stack in that link makes it look like it's the RCU clean-up triggering a
> domain destroy.  (Haven't looked deeper into the specific line numbers.)

In fact in this case it appears to be the xfree(sdom->repl_timer) in
csched2_free_domdata() being inside the critical section (which disables
irqs); there's actually an xfree() right in that function outside the
critical section.

 -George

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