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| author | Paul E. McKenney <paulmck@kernel.org> | 2021-03-25 03:08:48 +0300 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-05-18 20:54:51 +0300 |
| commit | cf868c2af244417ed276ba7f716b980841a71340 (patch) | |
| tree | ac16600d876132494cca5ce51396f31275569894 /tools/perf/util/scripting-engines/trace-event-python.c | |
| parent | 9fc98e3143de7b7e8d766aef41b46ec0bc0ae4ca (diff) | |
| download | linux-cf868c2af244417ed276ba7f716b980841a71340.tar.xz | |
rcu-tasks: Make ksoftirqd provide RCU Tasks quiescent states
Heavy networking load can cause a CPU to execute continuously and
indefinitely within ksoftirqd, in which case there will be no voluntary
task switches and thus no RCU-tasks quiescent states. This commit
therefore causes the exiting rcu_softirq_qs() to provide an RCU-tasks
quiescent state.
This of course means that __do_softirq() and its callers cannot be
invoked from within a tracing trampoline.
Reported-by: Toke Høiland-Jørgensen <toke@redhat.com>
Tested-by: Toke Høiland-Jørgensen <toke@redhat.com>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-python.c')
0 files changed, 0 insertions, 0 deletions