tree 7339b1d87039d77346d9a4ec3fb2be3316c6be81
parent 3c8fb50445833b93f69b6b703a29aae3523cad0c
author Bob Peterson <rpeterso@redhat.com> 1403271401 -0400
committer Steven Whitehouse <swhiteho@redhat.com> 1405678334 +0100

GFS2: Only wait for demote when last holder is dequeued

Function gfs2_glock_dq_wait is supposed to dequeue a glock and then
wait for the lock to be demoted. The problem is, if this is a shared
lock, its demote will depend on the other holders, which means you
might end up waiting forever because the other process is blocked.
This problem is especially apparent when dealing with nested flocks.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>