[Linux-cluster] DLM user API for blocking AST
teigland at redhat.com
Tue Dec 20 14:55:13 UTC 2016
> > As a workaround to avoid an unwanted bast callback after a completion, I
> > wonder if you could make a no-op call with NULL astaddr/astarg to prevent
> > any further callback using those?
> I assume that what you call a no-op is a lock conversion towards the same
> mode as before, correct?
That should work.
> Then I think for this to work we need the second assumption I made, ie.
> the kernel should not deliver the bast event to userland after it
> delivered the cast for the last conversion.
The suggestion just depended on clearing on the astaddr/astarg values in
the kernel (which will itself have some effect on callbacks being sent or
not). I hoped that might be a way to avoid analyzing callback ordering.
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