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xen-devel
Re: [Xen-devel] 2.6.32.27 dom0 - BUG: unable to handle kernel paging req
On 02/14/2011 03:52 PM, Christopher S. Aker wrote:
> On 1/31/11 5:25 PM, Jeremy Fitzhardinge wrote:
>> On 01/31/2011 01:07 PM, Christopher S. Aker wrote:
>>> Ian / Jeremy: Where do I go from here?
>>
>> It's also not impossible this bug is related to the "get_user_pages" bug
>> that has been discussed over the last few days. I need to think about
>> that too.
>
> How's that going? Any epiphanies? I've been trying to follow the
> list (and changesets) but wasn't sure if a potential fix snuck in or
> if there's something else I should be pressure cooking (an unrelated
> patch that may have the side effect of fixing my issue, for example).
No, I had a close look at it the other day and remained stumped. It
looks like the pgd is being freed while still in use, but I couldn't see
where that could happen unprotected from the lock. This is really
bugging me - there's something strange going on, which worries me.
J
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