Re: race condition in schedule_on_each_cpu()

Hello Tejun Heo, I've backported the schedule_on_each_cpu() "direct excution" patch on 3.0.30-rt50, and It fixed my problem. attachment is the effective patch. However, I do not understand why machine1 can expose problem, but machine2 not. I guess, because it's rt-kernel's preempt

Re: race condition in schedule_on_each_cpu()

ng up executing the function twice on the new cpu but skipping the old one. does this situation will happen in "Full preemption" config, on 3.0.30-rt50? 于 2013年06月07日 09:34, we...@kylinos.com.cn 写道: it's preemption mode related , on the 3.0.30-rt50, only config kernel

Re: race condition in schedule_on_each_cpu()

it's preemption mode related , on the 3.0.30-rt50, only config kernel with highest preemption level (Fully Preemptible Kernel (RT)) in cpu preemption model will cause problem and even i use the "Preemptible Kernel" or "Preemptible Kernel (Low-Latency Desktop)" the problem would not happen