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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2017-01-27 13:17:02 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2017-04-18 11:38:18 -0700
commit0f9be8cabbc343218dd2807af7308656be113045 (patch)
treed99e786bc49f6d77bbd1fa4fa7c4df31de9fed8d /kernel/kallsyms.c
parent9577df9a3122af08fff84b8a1a60dccf524a3891 (diff)
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rcu: Eliminate flavor scan in rcu_momentary_dyntick_idle()
The rcu_momentary_dyntick_idle() function scans the RCU flavors, checking that one of them still needs a quiescent state before doing an expensive atomic operation on the ->dynticks counter. However, this check reduces overhead only after a rare race condition, and increases complexity. This commit therefore removes the scan and the mechanism enabling the scan. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/kallsyms.c')
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