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(parent: b5b3936) | patch
rcu: Avoid invoking RCU core on offline CPUs
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Mon, 4 Feb 2013 20:14:24 +0000 (12:14 -0800)
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Tue, 12 Mar 2013 21:07:37 +0000 (14:07 -0700)
commitb0f740360efec6e6471547c0548f250bc045a233
treed76138b1443740c2aea593331c0898fe6c99a124tree | snapshot (tar.gz zip)
parentb5b393601dbce0bce3f0717f29e6c8d1cf0295dacommit | diff
rcu: Avoid invoking RCU core on offline CPUs

Offline CPUs transition through the scheduler to the idle loop one
last time before being shut down.  This can result in RCU raising
softirq on this CPU, which is at best useless given that the CPU's
callbacks will be offloaded at CPU_DEAD time.  This commit therefore
avoids raising softirq on offline CPUs.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
kernel/rcutree.c diff | blob | blame | history