[HPDD-discuss] question on PF_THREAD_BOUND

Hi, On our production lustre client systems, the kiblnd_sd_xx_yy threads have PF_THREAD_BOUND set in the task_struct->flags field. On the client systems in my test environment, the PF_THREAD_BOUND was not set. I checked /etc/modprobe.d/lustre, and I checked /etc/init.d/lustre, but nothing rang. Can someone shred light on how lustre decides whether to turn on PF_THREAD_BOUND or not? Thanks in advance! Jay