diff options
| author | Ingo Molnar <mingo@kernel.org> | 2017-04-27 07:41:37 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-04-27 07:41:37 +0200 |
| commit | 96fd20cf3f1620d699db43cd08745f1e57e1072a (patch) | |
| tree | 88b0caa1cd8bfa66e6a4b00ad21108f03369eb03 /kernel/rcu/rcutorture.c | |
| parent | d160a727c40e7175aa642137910a3fda46262fc8 (diff) | |
| parent | 22607d66bbc3e81140d3bcf08894f4378eb36428 (diff) | |
Merge branch 'rcu/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
Pull RCU updates from Paul E. McKenney:
"This series greatly reduces the performance degradation of Tree SRCU
on a CPU-hotplug stress test. The effect was not subtle: Mike Galbraith
measured Classic SRCU at 55 seconds and Tree SRCU at more than 16 -minutes-
for this test. Mike collected ftrace data that showed that Classic SRCU
was auto-expediting invocations of synchronize_srcu() that found SRCU
completely idle. This series therefore adds this auto-expedite capability
to Tree SRCU, bringing the performance shortfall to less than ten seconds,
which is a great improvement over the initial shortfall of 15 minutes."
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/rcu/rcutorture.c')
| -rw-r--r-- | kernel/rcu/rcutorture.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index e9d4527cdd43..ae6e574d4cf5 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1360,12 +1360,14 @@ rcu_torture_stats_print(void) cur_ops->stats(); if (rtcv_snap == rcu_torture_current_version && rcu_torture_current != NULL) { - int __maybe_unused flags; - unsigned long __maybe_unused gpnum; - unsigned long __maybe_unused completed; + int __maybe_unused flags = 0; + unsigned long __maybe_unused gpnum = 0; + unsigned long __maybe_unused completed = 0; rcutorture_get_gp_data(cur_ops->ttype, &flags, &gpnum, &completed); + srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, + &flags, &gpnum, &completed); wtp = READ_ONCE(writer_task); pr_alert("??? Writer stall state %s(%d) g%lu c%lu f%#x ->state %#lx\n", rcu_torture_writer_state_getname(), |