On 24 April 2014 14:01, Daniel Sangorrin daniel.sangorrin@toshiba.co.jp wrote:
In kernel/cpuset.c:quiesce_cpuset() you are using the function 'smp_call_function_any' which asks CPU cores in 'cpumask' to execute the functions 'hrtimer_quiesce_cpu' and 'timer_quiesce_cpu'.
In the case above, 'cpumask' corresponds to core 0. Since I'm forcing the call to be executed from core 1 (by using taskset), an inter-processor interrupt is sent to core 0 for those functions to be executed.
Ahh, I understood that now :) .. So we are setting cpuset.quiesce from CPU1 which will do a IPI to get migrate_timers called on CPU0.. I was setting quiesce from CPU0 only in my tests :)
But how does this work fine on x86 then? There we should have exactly same problem, isn't it?
Ok, thank you! I see that you have already fixed the problem. I tested your tree on ARM and now it seems to work correctly.
Yeah, I just pushed your changes as well at the time I wrote last mail :)