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authorPaul E. McKenney <paul.mckenney@linaro.org>2010-09-09 13:40:39 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2010-11-17 15:45:09 -0800
commitb2c0710c464ede15e1fc52fb1e7ee9ba54cea186 (patch)
tree7524518fec8a02e53c3fab558b40a5e94f0bb5ec /init/Kconfig
parentrcu: add priority-inversion testing to rcutorture (diff)
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rcu: move TINY_RCU from softirq to kthread
If RCU priority boosting is to be meaningful, callback invocation must be boosted in addition to preempted RCU readers. Otherwise, in presence of CPU real-time threads, the grace period ends, but the callbacks don't get invoked. If the callbacks don't get invoked, the associated memory doesn't get freed, so the system is still subject to OOM. But it is not reasonable to priority-boost RCU_SOFTIRQ, so this commit moves the callback invocations to a kthread, which can be boosted easily. Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'init/Kconfig')
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