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| author |   Eric Dumazet <edumazet@google.com> | 2014-04-16 09:06:24 -0700 |
|---|---|---|
| committer |   Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-04-29 08:45:40 -0700 |
| commit | a5d6d3a1b00a0ad88f07c3a727c79b27915278e3 (patch) | |
| tree | 0be0f5f7f7d538fcd6ec500b6a2f9380160da3e5 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | rcu: Replace __this_cpu_ptr() uses with raw_cpu_ptr() (diff) | |
| download | linux-dev-a5d6d3a1b00a0ad88f07c3a727c79b27915278e3.tar.xz linux-dev-a5d6d3a1b00a0ad88f07c3a727c79b27915278e3.zip | |
softirq: A single rcu_bh_qs() call per softirq set is enough
Calling rcu_bh_qs() after every softirq action is not really needed.
What RCU needs is at least one rcu_bh_qs() per softirq round to note a
quiescent state was passed for rcu_bh.
Note for Paul and myself : this could be inlined as a single instruction
and avoid smp_processor_id()
(sone this_cpu_write(rcu_bh_data.passed_quiesce, 1))
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions