Pranith Kumar 11ed7f934c rcu: Make nocb leader kthreads process pending callbacks after spawning ... The nocb callbacks generated before the nocb kthreads are spawned are enqueued in the nocb queue for later processing. Commit fbce7497ee ("rcu: Parallelize and economize NOCB kthread wakeups") introduced nocb leader kthreads which checked the nocb_leader_wake flag to see if there were any such pending callbacks. A case was reported in which newly spawned leader kthreads were not processing the pending callbacks as this flag was not set, which led to a boot hang. The following commit ensures that the newly spawned nocb kthreads process the pending callbacks by allowing the kthreads to run immediately after spawning instead of waiting. This is done by inverting the logic of nocb_leader_wake tests to nocb_leader_sleep which allows us to use the default initialization of this flag to 0 to let the kthreads run. Reported-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> Link: http://www.spinics.net/lists/kernel/msg1802899.html [ paulmck: Backported to v3.17-rc2. ] Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Tested-by: Amit Shah <amit.shah@redhat.com>		2014-08-28 05:59:59 -07:00
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Makefile	rcutorture: Abstract rcu_torture_random()	2014-02-23 09:00:58 -08:00
rcu.h	rcu: Fix __rcu_reclaim() to use true/false for bool	2014-07-09 09:15:32 -07:00
rcutorture.c	Josh has moved	2014-07-30 17:16:13 -07:00
srcu.c	rcu: Eliminate read-modify-write ACCESS_ONCE() calls	2014-07-09 09:14:49 -07:00
tiny.c	rcu: Ensure kernel/rcu/rcu.h can be sourced/used stand-alone	2014-02-26 06:35:18 -08:00
tiny_plugin.h	rcu: Protect uses of ->jiffies_stall with ACCESS_ONCE()	2014-04-29 08:44:41 -07:00
tree.c	rcu: Remove CONFIG_PROVE_RCU_DELAY	2014-07-09 09:15:31 -07:00
tree.h	rcu: Make nocb leader kthreads process pending callbacks after spawning	2014-08-28 05:59:59 -07:00
tree_plugin.h	rcu: Make nocb leader kthreads process pending callbacks after spawning	2014-08-28 05:59:59 -07:00
tree_trace.c	rcu: Stop tracking FSF's postal address	2014-02-17 15:01:37 -08:00
update.c	rcu: Remove CONFIG_PROVE_RCU_DELAY	2014-07-09 09:15:31 -07:00