diff options
| author | Paul E. McKenney <paulmck@kernel.org> | 2024-11-13 14:57:51 -0800 |
|---|---|---|
| committer | Boqun Feng <boqun.feng@gmail.com> | 2025-02-05 07:14:24 -0800 |
| commit | 623b52802bb0b33bee28716002249aae5d89c5ec (patch) | |
| tree | 38b42ddcfe8f6df4a158afba19c017f487d88b60 /kernel/torture.c | |
| parent | 2014c95afecee3e76ca4a56956a936e23283f05b (diff) | |
torture: Add get_torture_init_jiffies() for test-start time
This commit adds a get_torture_init_jiffies() function that returns the
value of the jiffies counter at the start of the test, that is, at the
point where torture_init_begin() was invoked.
This will be used to enable torture-test holdoffs for tests implemented
using per-CPU kthreads, which are created and deleted by CPU-hotplug
operations, and thus (unlike normal kthreads) don't automatically know
when the test started.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Diffstat (limited to 'kernel/torture.c')
| -rw-r--r-- | kernel/torture.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/torture.c b/kernel/torture.c index dede150aef01..3a0a8cc60401 100644 --- a/kernel/torture.c +++ b/kernel/torture.c @@ -792,6 +792,8 @@ static void torture_stutter_cleanup(void) stutter_task = NULL; } +static unsigned long torture_init_jiffies; + static void torture_print_module_parms(void) { @@ -821,6 +823,7 @@ bool torture_init_begin(char *ttype, int v) torture_type = ttype; verbose = v; fullstop = FULLSTOP_DONTSTOP; + WRITE_ONCE(torture_init_jiffies, jiffies); // Lockless reads. torture_print_module_parms(); return true; } @@ -837,6 +840,15 @@ void torture_init_end(void) EXPORT_SYMBOL_GPL(torture_init_end); /* + * Get the torture_init_begin()-time value of the jiffies counter. + */ +unsigned long get_torture_init_jiffies(void) +{ + return READ_ONCE(torture_init_jiffies); +} +EXPORT_SYMBOL_GPL(get_torture_init_jiffies); + +/* * Clean up torture module. Please note that this is -not- invoked via * the usual module_exit() mechanism, but rather by an explicit call from * the client torture module. Returns true if a race with system shutdown |