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| author |   Paul E. McKenney <paulmck@kernel.org> | 2022-02-23 17:29:37 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2022-04-11 17:28:48 -0700 |
| commit | c708b08c65a0dfae127b9ee33b0fb73535a5e066 (patch) | |
| tree | 3dc0ab8b7a448ab78d1c27fb11933e757e6dbc56 /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | rcu: Fix rcu_preempt_deferred_qs_irqrestore() strict QS reporting (diff) | |
| download | linux-dev-c708b08c65a0dfae127b9ee33b0fb73535a5e066.tar.xz linux-dev-c708b08c65a0dfae127b9ee33b0fb73535a5e066.zip | |
rcu: Check for jiffies going backwards
A report of a 12-jiffy normal RCU CPU stall warning raises interesting
questions about the nature of time on the offending system. This commit
instruments rcu_sched_clock_irq(), which is RCU's hook into the
scheduling-clock interrupt, checking for the jiffies counter going
backwards.
Reported-by: Saravanan D <sarvanand@fb.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions