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| author | Anders Roxell <anders.roxell@linaro.org> | 2018-11-30 15:56:22 +0100 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2019-05-08 12:15:12 -0400 |
| commit | 6fc2171c5c03672bae71d04a0f5fa88cc9c3b4e2 (patch) | |
| tree | 087d547fc1c6e2defff7ce4b8a3248c22520fb67 /kernel/trace/trace.c | |
| parent | bfcd631eb6de474d8e097fd0f9f840fdf7272a1d (diff) | |
| download | linux-6fc2171c5c03672bae71d04a0f5fa88cc9c3b4e2.tar.bz2 | |
tracing: Allow RCU to run between postponed startup tests
When building a allmodconfig kernel for arm64 and boot that in qemu,
CONFIG_FTRACE_STARTUP_TEST gets enabled and that takes time so the
watchdog expires and prints out a message like this:
'watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [swapper/0:1]'
Depending on what the what test gets called from init_trace_selftests()
it stays minutes in the loop.
Rework so that function cond_resched() gets called in the
init_trace_selftests loop.
Link: http://lkml.kernel.org/r/20181130145622.26334-1-anders.roxell@linaro.org
Co-developed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 3259019cc66d..4269af5905e4 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1722,6 +1722,10 @@ static __init int init_trace_selftests(void) pr_info("Running postponed tracer tests:\n"); list_for_each_entry_safe(p, n, &postponed_selftests, list) { + /* This loop can take minutes when sanitizers are enabled, so + * lets make sure we allow RCU processing. + */ + cond_resched(); ret = run_tracer_selftest(p->type); /* If the test fails, then warn and remove from available_tracers */ if (ret < 0) { |