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(parent: fe8d6a2) | 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)
commit19ebde14163b3e08024973856f623271e433aac2
treed76138b1443740c2aea593331c0898fe6c99a124tree | snapshot
parentfe8d6a2d394ad3f5257d4924a35173ebfe210a88commit | 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 | history
Linux Kernel Source Tree.