Messages in this thread Patch in this message | | | From | Zqiang <> | Subject | [PATCH] locktorture: Add raw_spinlock* torture tests for PREEMPT_RT kernels | Date | Wed, 15 Feb 2023 14:10:35 +0800 |
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For PREEMPT_RT kernel, the spin_lock, spin_lock_irq will converted to sleepable rt_spin_lock and the interrupt related suffix for spin_lock/unlock(_irq, irqsave/irqrestore) do not affect CPU's interrupt state. this commit therefore add raw_spin_lock torture tests, this is a strict spin lock implementation in RT kernels.
Signed-off-by: Zqiang <qiang1.zhang@intel.com> --- kernel/locking/locktorture.c | 58 ++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+)
diff --git a/kernel/locking/locktorture.c b/kernel/locking/locktorture.c index 9425aff08936..521197366f27 100644 --- a/kernel/locking/locktorture.c +++ b/kernel/locking/locktorture.c @@ -257,6 +257,61 @@ static struct lock_torture_ops spin_lock_irq_ops = { .name = "spin_lock_irq" }; +#ifdef CONFIG_PREEMPT_RT +static DEFINE_RAW_SPINLOCK(torture_raw_spinlock); + +static int torture_raw_spin_lock_write_lock(int tid __maybe_unused) +__acquires(torture_raw_spinlock) +{ + raw_spin_lock(&torture_raw_spinlock); + return 0; +} + +static void torture_raw_spin_lock_write_unlock(int tid __maybe_unused) +__releases(torture_raw_spinlock) +{ + raw_spin_unlock(&torture_raw_spinlock); +} + +static struct lock_torture_ops raw_spin_lock_ops = { + .writelock = torture_raw_spin_lock_write_lock, + .write_delay = torture_spin_lock_write_delay, + .task_boost = torture_rt_boost, + .writeunlock = torture_raw_spin_lock_write_unlock, + .readlock = NULL, + .read_delay = NULL, + .readunlock = NULL, + .name = "raw_spin_lock" +}; + +static int torture_raw_spin_lock_write_lock_irq(int tid __maybe_unused) +__acquires(torture_raw_spinlock) +{ + unsigned long flags; + + raw_spin_lock_irqsave(&torture_raw_spinlock, flags); + cxt.cur_ops->flags = flags; + return 0; +} + +static void torture_raw_spin_lock_write_unlock_irq(int tid __maybe_unused) +__releases(torture_raw_spinlock) +{ + raw_spin_unlock_irqrestore(&torture_raw_spinlock, cxt.cur_ops->flags); +} + +static struct lock_torture_ops raw_spin_lock_irq_ops = { + .writelock = torture_raw_spin_lock_write_lock_irq, + .write_delay = torture_spin_lock_write_delay, + .task_boost = torture_rt_boost, + .writeunlock = torture_raw_spin_lock_write_unlock_irq, + .readlock = NULL, + .read_delay = NULL, + .readunlock = NULL, + .name = "raw_spin_lock_irq" +}; +#endif + static DEFINE_RWLOCK(torture_rwlock); static int torture_rwlock_write_lock(int tid __maybe_unused) @@ -1017,6 +1072,9 @@ static int __init lock_torture_init(void) static struct lock_torture_ops *torture_ops[] = { &lock_busted_ops, &spin_lock_ops, &spin_lock_irq_ops, +#ifdef CONFIG_PREEMPT_RT + &raw_spin_lock_ops, &raw_spin_lock_irq_ops, +#endif &rw_lock_ops, &rw_lock_irq_ops, &mutex_lock_ops, &ww_mutex_lock_ops, -- 2.25.1
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