[ 150.733088] in_atomic(): 1, irqs_disabled(): 1, pid: 19, name: migration/2
[ 150.735456] INFO: lockdep is turned off.
[ 150.738903] irq event stamp: 28
[ 150.741255] hardirqs last enabled at (27): [<ffffffff816e6a80>]
_raw_spin_unlock_irq+0x30/0x50
[ 150.744884] hardirqs last disabled at (28): [<ffffffff816e616f>]
_raw_spin_lock_irq+0x1f/0x90
[ 150.748505] softirqs last enabled at (24): [<ffffffff810724a7>]
__do_softirq+0x167/0x3d0
[ 150.752121] softirqs last disabled at (19): [<ffffffff816f143c>]
call_softirq+0x1c/0x30
[ 150.755709] Pid: 19, comm: migration/2 Tainted: G W 3.7.0-rc2+ #2
[ 150.759361] Call Trace:
[ 150.762952] [<ffffffff810d53e0>] ? print_irqtrace_events+0xd0/0xe0
[ 150.766610] [<ffffffff810a3b4c>] __might_sleep+0x18c/0x250
[ 150.769140] [<ffffffff816e2ab0>] mutex_lock_nested+0x40/0x390
[ 150.772765] [<ffffffff810d853d>] ? trace_hardirqs_on+0xd/0x10
[ 150.776392] [<ffffffff816e6a80>] ? _raw_spin_unlock_irq+0x30/0x50
[ 150.778899] [<ffffffff81021829>] ? read_tsc+0x9/0x20
[ 150.782546] [<ffffffffa05877e3>] get_freq_sample+0x33/0xd0 [hw_latency_test]
[ 150.786249] [<ffffffff810fac9b>] stop_machine_cpu_stop+0xab/0x110
[ 150.789964] [<ffffffff810fadd6>] cpu_stopper_thread+0xd6/0x1b0
[ 150.792528] [<ffffffff810fabf0>] ? cpu_stop_queue_work+0x80/0x80
[ 150.795044] [<ffffffff8115798e>] ? perf_event_alloc+0x5e/0x4a0
[ 150.797572] [<ffffffff816e4672>] ? __schedule+0x442/0xa00
[ 150.800079] [<ffffffff810fad00>] ? stop_machine_cpu_stop+0x110/0x110
[ 150.802512] [<ffffffff810938fd>] kthread+0xed/0x100
[ 150.805825] [<ffffffff81093810>] ? flush_kthread_worker+0x190/0x190
[ 150.808051] [<ffffffff816f00ec>] ret_from_fork+0x7c/0xb0
[ 150.810161] [<ffffffff81093810>] ? flush_kthread_worker+0x190/0x190
Signed-off-by: Luming Yu <luming...@intel.com>
---
drivers/misc/hw_latency_test.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/misc/hw_latency_test.c b/drivers/misc/hw_latency_test.c
index 2aa3a74..e970642 100644
--- a/drivers/misc/hw_latency_test.c
+++ b/drivers/misc/hw_latency_test.c
@@ -149,7 +149,7 @@ static int get_random_bytes_sample(void *unused)
u64 sample = 0;
int ret = 1;
- buffer = kzalloc(1024, GFP_KERNEL);
+ buffer = kzalloc(1024, GFP_ATOMIC);
start = ktime_get();
do {
--
1.7.12.1
--
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