• Sunil Mushran's avatar
    ocfs2/dlm: Do not migrate resource to a node that is leaving the domain · 66effd3c
    Sunil Mushran authored
    During dlm domain shutdown, o2dlm has to free all the lock resources. Ones that
    have no locks and references are freed. Ones that have locks and/or references
    are migrated to another node.
    The first task in migration is finding a target. Currently we scan the lock
    resource and find one node that either has a lock or a reference. This is not
    very efficient in a parallel umount case as we might end up migrating the
    lock resource to a node which itself may have to migrate it to a third node.
    The patch scans the dlm->exit_domain_map to ensure the target node is not
    leaving the domain. If no valid target node is found, o2dlm does not migrate
    the resource but instead waits for the unlock and deref messages that will
    allow it to free the resource.
    Signed-off-by: default avatarSunil Mushran <sunil.mushran@oracle.com>
    Signed-off-by: default avatarJoel Becker <jlbec@evilplan.org>
dlmmaster.c 94.3 KB