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| author | Paul E. McKenney <paulmck@kernel.org> | 2020-06-16 15:38:24 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-06-29 12:01:45 -0700 |
| commit | 2102ad290af06119ccfb56ddc3a0e5011a91537e (patch) | |
| tree | da41520758b863ec3b55f07a2de286af320eec08 /kernel/torture.c | |
| parent | 06efa9b4b27f926eeb8c935f430f8557eb8b106e (diff) | |
| download | linux-2102ad290af06119ccfb56ddc3a0e5011a91537e.tar.gz linux-2102ad290af06119ccfb56ddc3a0e5011a91537e.tar.bz2 linux-2102ad290af06119ccfb56ddc3a0e5011a91537e.zip | |
torture: Dump ftrace at shutdown only if requested
If there is a large number of torture tests running concurrently,
all of which are dumping large ftrace buffers at shutdown time, the
resulting dumping can take a very long time, particularly on systems
with rotating-rust storage. This commit therefore adds a default-off
torture.ftrace_dump_at_shutdown module parameter that enables
shutdown-time ftrace-buffer dumping.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/torture.c')
| -rw-r--r-- | kernel/torture.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/torture.c b/kernel/torture.c index a1a41484ff6d..1061492f14bd 100644 --- a/kernel/torture.c +++ b/kernel/torture.c @@ -45,6 +45,9 @@ MODULE_AUTHOR("Paul E. McKenney <paulmck@linux.ibm.com>"); static bool disable_onoff_at_boot; module_param(disable_onoff_at_boot, bool, 0444); +static bool ftrace_dump_at_shutdown; +module_param(ftrace_dump_at_shutdown, bool, 0444); + static char *torture_type; static int verbose; @@ -527,7 +530,8 @@ static int torture_shutdown(void *arg) torture_shutdown_hook(); else VERBOSE_TOROUT_STRING("No torture_shutdown_hook(), skipping."); - rcu_ftrace_dump(DUMP_ALL); + if (ftrace_dump_at_shutdown) + rcu_ftrace_dump(DUMP_ALL); kernel_power_off(); /* Shut down the system. */ return 0; } |