[Ocfs2-devel] [PATCH] ocfs2_dlmfs: Use poll() to signify BASTs.

[Joel Becker]

On Wed, Jan 27, 2010 at 02:13:31PM -0800, Joel Becker wrote:
> Because there is no asynchronous notification, there is no way for a
> process holding a lock to know another node needs the lock.  This is the
> number one complaint of ocfs2_dlmfs users.  Turns out, we can solve this
> very easily.  We add poll() support to ocfs2_dlmfs.  When a BAST is
> received, the lock's file descriptor will receive POLLIN.

	Here's a test program to drive this with raw filesystem access.
Start a heartbeat on each node, then run the test program on each node.
They should pass the lock around.

Joel

-- 

Life's Little Instruction Book #396

	"Never give anyone a fruitcake."

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