[Ocfs2-devel] [PATCH] ocfs2: Ignore BASTs fired after an AST for a drop lock]

[Joel Becker]

On Wed, Feb 10, 2010 at 12:21:48PM -0800, Sunil Mushran wrote:
> So it requests NL => PR. It gets a BAST with blocking EX
> before the AST for PR. The last patch added changed the
> BAST handling to not schedule the downconvert thread if
> the current lock level was compatible. In this case, because
> the BAST is before the AST, the lock level is still NL.

	Just looking at Dave's email and thinking about what we changed,
I thought "what if the level was too low in the bast and it didn't
schedule a downconvert?".  This would require the BAST before the AST,
and sure enough, you found it.
	I agree, if the BAST is before the AST, it's a DLM bug.  You
can't be blocking a lock you don't know you have.

Joel

-- 

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Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker at oracle.com
Phone: (650) 506-8127