We saw an issue in a production server on a customer deployment where DLM 4.0.7 gets "stuck" and unable to join new lockspaces.
See - https://lists.clusterlabs.org/pipermail/users/2019-January/016054.html This was forwarded off list to David Teigland who responded thusly. " Hi, thanks for the debugging info. You've spent more time looking at this than I have, but from a first glance it seems to me that the initial problem (there may be multiple) is that in the kernel, lockspace.c do_event() does not sensibly handle the ERESTARTSYS error from wait_event_interruptible(). I think do_event() should continue waiting for a uevent result from userspace until it gets one, because the kernel can't do anything sensible until it gets that. Dave " This change does that. We have it running in automation with no problems so far but comments welcome. Mark Syms (1): Retry wait_event_interruptible in event of ERESTARTSYS fs/dlm/lockspace.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) -- 184.108.40.206