Re: [Xen-devel] xc_gntshr_unmap problems (BUG(s) in xen-gntalloc?)

[Dave Scott <Dave.Scott@xxxxxxxxxx>]

On 1 Sep 2014, at 11:19, David Vrabel <david.vrabel@xxxxxxxxxx> wrote:

> On 29/08/14 22:15, Dave Scott wrote:
>> Hi,
>> 
>> On 29 Aug 2014, at 15:05, David Vrabel <david.vrabel@xxxxxxxxxx> wrote:
>> 
>>> On 29/08/14 13:40, Dave Scott wrote:
>>>> Hi,
>>>> 
>>>> On 28 Aug 2014, at 14:50, David Vrabel <david.vrabel@xxxxxxxxxx> wrote:
>>>> 
>>>>> Does this patch fix the oops?
>>>> 
>>>> Yes, I’ve left my test case running for several hours with no sign of 
>>>> trouble.
>>> 
>>> Thanks. I'll take that as a
>>> 
>>> Tested-by: Dave Scott <david.scott@xxxxxxxxxx>
>> 
>> I just realised that my tests weren’t as clear-cut as I hoped. When
>> I rebuilt my ubuntu kernel I accidentally got a free upgrade from 3.2 to
>> 3.13, so what I actually tested was:
>> 
>> 3.2: kernel oops triggered easily
>> 3.13 plus your patch: seems solid
>> 
>> I could go back and test 3.13 minus your patch if that would be helpful.
> 
> Please. I can't seem to easily trigger the race on my test system.  How
> long does it take to fail typically in your case?

I tested it on 3.13 minus your patch and it works fine.

On 3.2 it manifested pretty-much instantly. I can’t make it fail on 3.13 at all.

Sorry if I’ve wasted your time!

Dave


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