Re: [libvirt] In libxl_driver, how to lock/unlock objects while doing an operation that runs for a long time?
Daniel P. Berrange wrote:
On Thu, May 10, 2012 at 11:20:20PM +0800, Oscar Ben wrote:
> In the discussion :
> http://thread.gmane.org/gmane.comp.emulators.libvirt/53534
>
> People mentioned about long-term operations' LOCKs there. It seems that, in
> libxl_driver, certain opeations may hold a lock for too long, thus other
> operations, even those just do query jobs, would be blocked.
>
> In qemu_driver, there seems to be a more complexy way to solve this
> problem, by employing a condition variable.
>
Yep, that's pretty much the approach we'd want to take for libxl too
I believe.
Agreed.
Chunyan, the author of the patch Oscar mentions, is on maternity leave
now. Bamvor (cc'd) is becoming familiar with the patch, review
comments, etc. and will submit a new version. Part of that work will
need to include addressing the locking issues noted in the thread.
Regards,
Jim