Kernel

[PATCH tip/core/rcu 08/23] rcu: rename rcutiny rcu_ctrlblk to rcu_sched_ctrlblk
Make naming line up in preparation for CONFIG_TINY_PREEMPT_RCU. Signed-off-by: Paul E. McKenney <paulmck(a)linux.vnet.ibm.com> --- kernel/rcutiny.c | 13 +++++++------ 1 files changed, 7 insertions(+), 6 deletions(-) diff --git a/kernel/rcutiny.c b/kernel/rcutiny.c index 272c6d2..d9f8a62 100644 --- a/kernel... 20 Apr 2010 18:30

[PATCH tip/core/rcu 21/23] rcu head remove init
From: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> RCU heads really don't need to be initialized. Their state before call_rcu() really does not matter. We need to keep init/destroy_rcu_head_on_stack() though, since we want debugobjects to be able to keep track of these objects. Signed-off-by: Mathieu D... 20 Apr 2010 18:30

[PATCH tip/core/rcu 23/23] rcu: make SRCU usable in modules
Add a #include for mutex.h to allow SRCU to be more easily used in kernel modules. Signed-off-by: Lai Jiangshan <laijs(a)cn.fujitsu.com> Signed-off-by: Paul E. McKenney <paulmck(a)linux.vnet.ibm.com> --- include/linux/srcu.h | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/include/linux/... 20 Apr 2010 18:30

[PATCH tip/core/rcu 04/23] rcu: ignore offline CPUs in last non-dyntick-idle CPU check
From: Lai Jiangshan <laijs(a)cn.fujitsu.com> Offline CPUs are not in nohz_cpu_mask, but can be ignored when checking for the last non-dyntick-idle CPU. This patch therefore only checks online CPUs for not being dyntick idle, allowing fast entry into full-system dyntick-idle state even when there are some offline C... 20 Apr 2010 18:30

[PATCH tip/core/rcu 19/23] rcu head introduce rcu head init on stack
From: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> PEM: o Would it be possible to make this bisectable as follows? a. Insert a new patch after current patch 4/6 that defines destroy_rcu_head_on_stack(), init_rcu_head_on_stack(), and init_rcu_head() with ... 20 Apr 2010 18:30

[PATCH tip/core/rcu 12/23] rcu: disable CPU stall warnings upon panic
The current RCU CPU stall warnings remain enabled even after a panic occurs, which some people have found to be a bit counterproductive. This patch therefore uses a notifier to disable stall warnings once a panic occurs. Signed-off-by: Paul E. McKenney <paulmck(a)linux.vnet.ibm.com> --- kernel/rcutree.c | 24 +... 20 Apr 2010 18:30

[PATCH tip/core/rcu 07/23] rcu: shrink rcutiny by making synchronize_rcu_bh() be inline
Because synchronize_rcu_bh() is identical to synchronize_sched(), make the former a static inline invoking the latter, saving the overhead of an EXPORT_SYMBOL_GPL() and the duplicate code. Signed-off-by: Paul E. McKenney <paulmck(a)linux.vnet.ibm.com> --- include/linux/rcupdate.h | 2 -- include/linux/rcutiny... 20 Apr 2010 18:30

[PATCH tip/core/rcu 13/23] rcu: print boot-time console messages if RCU configs out of ordinary
Print boot-time messages if tracing is enabled, if fanout is set to non-default values, if exact fanout is specified, if accelerated dyntick-idle grace periods have been enabled, if RCU-lockdep is enabled, if rcutorture has been boot-time enabled, if the CPU stall detector has been disabled, or if four-level hierar... 20 Apr 2010 18:30

[PATCH tip/core/rcu 01/23] rcu: substitute set_need_resched for sending resched IPIs
This patch adds a check to __rcu_pending() that does a local set_need_resched() if the current CPU is holding up the current grace period and if force_quiescent_state() will be called soon. The goal is to reduce the probability that force_quiescent_state() will need to do smp_send_reschedule(), which sends an IPI ... 20 Apr 2010 18:30

[PATCH tip/core/rcu 06/23] rcu: fix now-bogus rcu_scheduler_active comments.
The rcu_scheduler_active check has been wrapped into the new debug_lockdep_rcu_enabled() function, so update the comments to reflect this new reality. Signed-off-by: Paul E. McKenney <paulmck(a)linux.vnet.ibm.com> --- include/linux/rcupdate.h | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) dif... 20 Apr 2010 18:30