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| author | Lai Jiangshan <[email protected]> | 2019-11-01 11:06:22 +0000 |
|---|---|---|
| committer | Paul E. McKenney <[email protected]> | 2020-01-24 18:27:33 +0000 |
| commit | 2eeba5838fd8c5e19bb91e25624116936348e7af (patch) | |
| tree | 2b353e5078dbf4b377b776924771983cb70fbb77 /tools/perf/scripts/python/event_analyzing_sample.py | |
| parent | rcu: Rename some instance of CONFIG_PREEMPTION to CONFIG_PREEMPT_RCU (diff) | |
| download | kernel-2eeba5838fd8c5e19bb91e25624116936348e7af.tar.gz kernel-2eeba5838fd8c5e19bb91e25624116936348e7af.zip | |
rcu: Clear .exp_hint only when deferred quiescent state has been reported
Currently, the .exp_hint flag is cleared in rcu_read_unlock_special(),
which works, but which can also prevent subsequent rcu_read_unlock() calls
from helping expedite the quiescent state needed by an ongoing expedited
RCU grace period. This commit therefore defers clearing of .exp_hint
from rcu_read_unlock_special() to rcu_preempt_deferred_qs_irqrestore(),
thus ensuring that intervening calls to rcu_read_unlock() have a chance
to help end the expedited grace period.
Signed-off-by: Lai Jiangshan <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/event_analyzing_sample.py')
0 files changed, 0 insertions, 0 deletions