From: Joel Becker <Joel.Becker@oracle.com>
To: ocfs2-devel@oss.oracle.com
Subject: [Ocfs2-devel] [PATCH] ocfs2_dlmfs: Use poll() to signify BASTs.
Date: Wed, 27 Jan 2010 18:59:38 -0800 [thread overview]
Message-ID: <20100128025938.GC21942@mail.oracle.com> (raw)
In-Reply-To: <20100127221330.GA21942@mail.oracle.com>
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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prev parent reply other threads:[~2010-01-28 2:59 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-27 22:13 [Ocfs2-devel] [PATCH] ocfs2_dlmfs: Use poll() to signify BASTs Joel Becker
2010-01-28 2:59 ` Joel Becker [this message]
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