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670090
2010 Jul 29
1
[PATCH] vhost: locking/rcu cleanup
I saw WARN_ON(!list_empty(&dev->work_list)) trigger
so our custom flush is not as airtight as need be.
This patch switches to a simple atomic counter + srcu instead of
the custom locked queue + flush implementation.
This will slow down the setup ioctls, which should not matter -
it's slow path anyway. We use the expedited flush to at least
make sure it has a sane time bound.
Works