On 09/02/2015 09:22, Xiao Guangrong wrote:
On 02/06/2015 08:48 PM, Paolo Bonzini wrote:
+unsigned int halt_poll_ns = 0;
+module_param(halt_poll_ns, uint, S_IRUGO | S_IWUSR);
Can we make this parameter be changeable? So that we can tune it
on the fly.
It is changeable (S_IWUSR).
+ cur = ktime_get();
We can move this into the tracepoint to avoid the workload if the
tracepoint is not enabled.
You have a point. I didn't do it because I expect that halt_poll_ns
will be always enabled as soon as it auto-tunes, and in that case you'll
always have to do the ktime_get() for autotuning purposes.