diff options
| author | Frederic Weisbecker <[email protected]> | 2012-07-11 20:26:40 +0200 |
|---|---|---|
| committer | Frederic Weisbecker <[email protected]> | 2012-09-26 15:47:16 +0200 |
| commit | 1fd2b4425a5702c112b441e20b250ac8833a9608 (patch) | |
| tree | 502bd504d85db494a6876a37d1a847e9fb6477d8 | |
| parent | edf55fda35c7dc7f2d9241c3abaddaf759b457c6 (diff) | |
rcu: Userspace RCU extended QS selftest
Provide a config option that enables the userspace
RCU extended quiescent state on every CPUs by default.
This is for testing purpose.
Signed-off-by: Frederic Weisbecker <[email protected]>
Cc: Alessio Igor Bogani <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Avi Kivity <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Geoff Levand <[email protected]>
Cc: Gilad Ben Yossef <[email protected]>
Cc: Hakan Akkan <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Josh Triplett <[email protected]>
Cc: Kevin Hilman <[email protected]>
Cc: Max Krasnyansky <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephen Hemminger <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Sven-Thorsten Dietrich <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
Reviewed-by: Josh Triplett <[email protected]>
| -rw-r--r-- | init/Kconfig | 8 | ||||
| -rw-r--r-- | kernel/rcutree.c | 2 |
2 files changed, 9 insertions, 1 deletions
diff --git a/init/Kconfig b/init/Kconfig index f6a1830165ce..c26b8a1d2b57 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -451,6 +451,14 @@ config RCU_USER_QS excluded from the global RCU state machine and thus doesn't to keep the timer tick on for RCU. +config RCU_USER_QS_FORCE + bool "Force userspace extended QS by default" + depends on RCU_USER_QS + help + Set the hooks in user/kernel boundaries by default in order to + test this feature that treats userspace as an extended quiescent + state until we have a real user like a full adaptive nohz option. + config RCU_FANOUT int "Tree-based hierarchical RCU fanout value" range 2 64 if 64BIT diff --git a/kernel/rcutree.c b/kernel/rcutree.c index d2e74c8d4b0e..812d04b6b395 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -206,7 +206,7 @@ EXPORT_SYMBOL_GPL(rcu_note_context_switch); DEFINE_PER_CPU(struct rcu_dynticks, rcu_dynticks) = { .dynticks_nesting = DYNTICK_TASK_EXIT_IDLE, .dynticks = ATOMIC_INIT(1), -#ifdef CONFIG_RCU_USER_QS +#if defined(CONFIG_RCU_USER_QS) && !defined(CONFIG_RCU_USER_QS_FORCE) .ignore_user_qs = true, #endif }; |