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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2009-08-24 09:42:01 -0700
committerIngo Molnar <mingo@elte.hu>2009-08-24 20:37:04 +0200
commit33f76148ced0e0618062e302d2a9614efdbd4a06 (patch)
tree82a5c2719301bcb9f20b0597b77e91529f9ec2df /kernel/rcutree.c
parent7c614d6461399acca5c0ba444f5db49cb332fc08 (diff)
downloadop-kernel-dev-33f76148ced0e0618062e302d2a9614efdbd4a06.zip
op-kernel-dev-33f76148ced0e0618062e302d2a9614efdbd4a06.tar.gz
rcu: Add CPU-offline processing for single-node configurations
Add preemptable-RCU plugin to handle the CPU-offline processing. An additional plugin is forthcoming to handle multinode RCU trees, but this current plugin works for configurations up to 32 CPUs (64 CPUs for 64-bit kernels). Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: laijs@cn.fujitsu.com Cc: dipankar@in.ibm.com Cc: akpm@linux-foundation.org Cc: mathieu.desnoyers@polymtl.ca Cc: josht@linux.vnet.ibm.com Cc: dvhltc@us.ibm.com Cc: niv@us.ibm.com Cc: peterz@infradead.org Cc: rostedt@goodmis.org LKML-Reference: <12511321213336-git-send-email-> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/rcutree.c')
-rw-r--r--kernel/rcutree.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index cc02557..000b076 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -84,6 +84,7 @@ extern long rcu_batches_completed_sched(void);
static void cpu_quiet_msk(unsigned long mask, struct rcu_state *rsp,
struct rcu_node *rnp, unsigned long flags);
static void cpu_quiet_msk_finish(struct rcu_state *rsp, unsigned long flags);
+static void __rcu_offline_cpu(int cpu, struct rcu_state *rsp);
static void __rcu_process_callbacks(struct rcu_state *rsp,
struct rcu_data *rdp);
static void __call_rcu(struct rcu_head *head,
@@ -920,6 +921,7 @@ static void rcu_offline_cpu(int cpu)
{
__rcu_offline_cpu(cpu, &rcu_sched_state);
__rcu_offline_cpu(cpu, &rcu_bh_state);
+ rcu_preempt_offline_cpu(cpu);
}
#else /* #ifdef CONFIG_HOTPLUG_CPU */
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