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