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(parent: bb311ec) | patch
rcu: Add tracing for rcuo no-CBs CPU wakeup handshake
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Wed, 14 Aug 2013 23:24:26 +0000 (16:24 -0700)
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Mon, 23 Sep 2013 16:18:13 +0000 (09:18 -0700)
commit9261dd0da6c6432f08670719069449c6efe4f7a9
treeb8c95dd0e4751e3069e9263d6f46b86251d5dc35tree | snapshot
parentbb311eccbdab974639263060b8452bf304af0b0ccommit | diff
rcu: Add tracing for rcuo no-CBs CPU wakeup handshake

Lost wakeups from call_rcu() to the rcuo kthreads can result in hangs
that are difficult to diagnose.  This commit therefore adds tracing to
help pin down the cause of these hangs.

Reported-by: Clark Williams <williams@redhat.com>
Reported-by: Carsten Emde <C.Emde@osadl.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
[ paulmck: Add const per kbuild test robot's advice. ]
include/trace/events/rcu.h diff | blob | history
kernel/rcutree_plugin.h diff | blob | history
Beck SC1x5 Kernel