* Eran Mann <emann@xxxxxxx> wrote:
On my machine, disabling CONFIG_LATENCY_TRACE causes the kernel to
stop reporting preempt latencies. After
# echo 1 > /proc/sys/kernel/preempt_max_latency
/proc/sys/kernel/preempt_max_latency always shows 1 no matter what
load is on the machine. I´ve seen this behavior since the first time I
tried to disable CONFIG_LATENCY_TRACE, around V0.7.31.something.
indeed - there was a thinko in trace_stop_sched_switched() that likely
caused this problem. Does the -32-8 patch (freshly uploaded) work better
for you?
Ingo