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Re: DMAPI implementation about undeliverable event messages

To: Dean Roehrich <roehrich@xxxxxxx>
Subject: Re: DMAPI implementation about undeliverable event messages
From: Aurelien Degremont - Stagiaire <degremont@xxxxxxxxxxx>
Date: Fri, 11 Mar 2005 15:51:26 +0100
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: <20050308173802.A408E4FDD1@chewtoy.americas.sgi.com>
References: <20050308173802.A408E4FDD1@chewtoy.americas.sgi.com>
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Dean Roehrich a écrit :
Well, let's back up.  Why is your HSM application not present?  Why did it
destroy its sessions, but not unregister the events it had put on the
filesystem?

Yes, I agree this error occurs only because of algorithm error. The HSM app should have unregistered the events before destroying its sessions.
(err... why notification could be persistent in we must always removed them ?)


I just wanted to say it will be "better" if DMAPI no not block in this particular case.

With all other events, it is still possible to recover when a event is raised with no application to catch it. A DM app is still abled to register and fetch it later, except for UNMOUNT event.

So, if the code could be fixed to work around this problem, ok, let's do it, else that's a pity.


(The issue occured also with the DM_PREUNMOUNT_EVENT, same behaviour)


Aurelien


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