[Linux-cluster] DLM user API for blocking AST

[Jean-Marc Saffroy]

On Mon, 19 Dec 2016, David Teigland wrote:

> 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?

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.

[... assumptions ...]
> That also sounds like it should be true.
> 
> To say with more certainty would require closer study of the code, because
> whatever rules exist are a function of the current implemention, and not
> derived from higher design rules per se.

Ok, I understand.

Thank you David!


Cheers,
JM

-- 
saffroy at gmail.com