[Linux-cluster] Discover persistent/orphan lock

[Stanley Wang]

We met some problems about DLM's persistent/orphan lock feature. DLM
does nothing when a user mode lock client that holds persistent locks
exits abnormally. Then the resource master has totally no idea about the
persistent/orphan lock. Hence it's impossible for other clients to know
that this lock is an orphan lock. 
Another one is that there is no way to query orphan lock though
dlm_query. A dedicated query command is needed for it.

Any comments?

I did little hacks against DLM to resolve these probelms (please check
out the attachment). I use a special way to notify resouce master when a
lock become orphan lock (conver to the granted mode with a new special
flag).

Best Regards,
Stan
-- 
Opinions expressed are those of the author and do not represent Intel
Corporation
"gpg --recv-keys --keyserver wwwkeys.pgp.net E1390A7F"
{E1390A7F:3AD1 1B0C 2019 E183 0CFF  55E8 369A 8B75 E139 0A7F}


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