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Re: [libvirt] [PATCH 00/13] More refactoring of QEMU driver objects & locking



On Wed, Jan 16, 2013 at 02:06:11PM +0000, Daniel P. Berrange wrote:
> This series does more general refactoring to help in the goal of killing
> the big QEMU driver lock. There are 3 key changes in this series
> 
>  - Isolating all QEMU configuration parameters in one struct.
>  - Making virDomainObjList self-locking
>  - Add dedicated locking to PCI/USB device lists
> 
> There are all the really hard bits of the QEMU locking. As can be seen
> from the last patch there is still more work to be done before the QEMU
> driver lock can be said to be truely dead, but this is less critical.

Oh and the motivation for doing this work now is that it is a pre-requisite
to the role based access control patches. I realized that those patches
would have required holding the QEMU driver lock in many more places making
concurrency much worse.


Daniel
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