Hi all, This is a question about sched_rt.c. I am hoping this is the correct mailing list for such questions. If not, could somebody direct me to the correct place? I am using 2.6.25.16 on an MX27 (ARM) While running a process with 3 threads using RT scheduler (priorities at RT, -93 and -87), get the WARN_ON() WARN_ON(!rt_rq->rt_nr_running) I also see WARN_ON(rt_se_prio(rt_se) < rt_rq->highest_prio); Both these warnings are very rare. This happens after running the application for several hours (> 6 hours) to a small number of days (1 or 2 days) CONFIG_SMP is not enabled CONFIG_RT_GROUP_SCHED is enabled As it happens very rarely, it has been hard to track it down. Does anybody know of any issues in this area in 2.6.25.16 and if yes, what is the best way to address this? I am attaching the dump_stack() output. Thanks much for your help, -raja.