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Re: [Libguestfs] question on nbdkit shutdown behavior

On Tue, Nov 14, 2017 at 03:56:59PM +0000, Richard W.M. Jones wrote:
> Going back to the original problem, perhaps we could have fixed
> it instead by acquiring a lock around all plugin callbacks, and
> ensuring that plugin_cleanup also acquires the same lock.  The
> lock would normally be uncontended so it shouldn't cause any
> performance issues.  That would be a fairly simple revert of
> 63f0eb088 + alternate fix.

No actually that would serialize everything.  Some sort of mutex
primitive, I think a shared/exclusive lock with the exclusive lock
being taken in plugin_cleanup.


Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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