Messages in this thread Patch in this message | | | Subject | Re: sched.c:659 dec_rt_tasks BUG with patch-2.6.15-rt1 (realtime-preempt) | From | Steven Rostedt <> | Date | Fri, 06 Jan 2006 20:05:36 -0500 |
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On Thu, 2006-01-05 at 17:15 +0200, Nedko Arnaudov wrote: > Will try to crash SMP ASAP, I'm not able to do tests now. > > I do erase/burn of 210 MiB rw disk. Erase is done without crash. > I use version 2.01.01a03 of cdrecord. > It crashes when burning: > > http://nedko.arnaudov.name/tmp/rt-cdrecord-crash.jpg > > Same crash occurs when I run oss2jack with -d option. > It does not occur when running without -d option (daemonize). >
Nedko,
Could you try either the patch below, or the link http://home.stny.rr.com/rostedt/patches/patch-2.6.15-rt2-sr2 which has the patch included, to see if this fixes your problem.
Thanks,
-- Steve
Index: linux-2.6.15-rt2/kernel/sched.c =================================================================== --- linux-2.6.15-rt2.orig/kernel/sched.c 2006-01-06 17:49:41.000000000 -0500 +++ linux-2.6.15-rt2/kernel/sched.c 2006-01-06 19:36:17.000000000 -0500 @@ -783,7 +783,6 @@ static inline void inc_nr_running(task_t *p, runqueue_t *rq) { rq->nr_running++; - inc_rt_tasks(p, rq); } static inline void dec_nr_running(task_t *p, runqueue_t *rq) @@ -921,11 +920,17 @@ static inline void __activate_task_after(task_t *p, task_t *parent, runqueue_t *rq) { + trace_special_pid(p->pid, p->prio, rq->nr_running); + if (p->flags & PF_DEAD) { + printk("BUG: %s/%d: dead task enqueued!\n", p->comm, p->pid); + dump_stack(); + } + sched_info_queued(p); // FIXME: to head rather? list_add_tail(&p->run_list, &parent->run_list); p->array = parent->array; p->array->nr_active++; - + inc_rt_tasks(p, p->array->rq); inc_nr_running(p, rq); }
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