rcu,cleanup: simplify the code when cpu is dying

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When we handle the CPU_DYING notifier, the whole system is stopped except
for the current CPU.  We therefore need no synchronization with the other
CPUs.  This allows us to move any orphaned RCU callbacks directly to the
list of any online CPU without needing to run them through the global
orphan lists.  These global orphan lists can therefore be dispensed with.
This commit makes thes changes, though currently victimizes CPU 0 @@@.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

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Lai Jiangshan 2010-10-20 14:13:06 +08:00 • committed by Paul E. McKenney

parent 7b27d5475f

commit 29494be71a

4 changed files with 31 additions and 78 deletions

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81

kernel/rcutree.c

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16

kernel/rcutree.h

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8

kernel/rcutree_plugin.h

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4

kernel/rcutree_trace.c

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