[vbox-dev] changeset(s) in 4.1.16 for fixing SMP VM hang after resume from pause / savestate?

[Li Xin]

Ramshankar,
This is exactly what I need, thanks a lot!
-Bill

2012/8/15 Ramshankar <ramshankar.venkataraman at oracle.com>:
> On 14/08/12 22:08, Li Xin wrote:
>>
>> Hi,
>>
>> In the changelog of VirtualBox Release 4.1.16, it is mentioned that:
>>
>> VMM: fixed a VM hang after a resume from pause / savestate with SMP
>> guests in rare cases
>>
>> I need to pull the fix into my code base, and have examined all the
>> changes between 4.1.14 and 4.1.16, but no one seems obvious.  41096
>> (https://www.virtualbox.org/changeset/41096/vbox) and
>> 41312(https://www.virtualbox.org/changeset/41312/vbox) look related,
>> but really can't tell.  On the other side it's hard to verify because
>> the problem only happens "in rare cases".
>>
>> Can someone please elaborate the changeset(s) fixing the SMP hang problem?
>
>
> Why not pull all the changes?
>
> Anyway...
>
> r41312 is part of the optimizations with TLB flushing during world switches.
> This is only in 4.2.x (BETAs and the upcoming release) and has not been
> backported to the 4.1.x branch. So the change you are looking for is not
> r41312.
>
> r41096 is for the change which is documented in the 4.1.16 changelog as:
> "VBoxManage: fixed controlvm savestate if the VM is already paused"
>
> The change you are looking for is in VMMR3/EM.cpp.
> Since the public trac has no convenient way to browse revision history for
> files, I'm attaching the diff. of the original change; hope this helps.
>
> Regards,
> Ram.
>
>> Thanks in advance!
>> -Bill
>>
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>
>



-- 
-Xin