Messages in this thread | | | Date | Sun, 18 Dec 2005 19:00:32 -0600 | From | "K.R. Foley" <> | Subject | Re: 2.6.15-rc5-rt2 won't boot on dual 933 |
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Steven Rostedt wrote: > On Sun, 2005-12-18 at 15:55 -0600, K.R. Foley wrote: >> dump_stack+0x1e/0x20 (20) >> [<c011c9df>] preempt_enable_no_resched+0x5f/0x70 (20) >> [<c0100ff2>] cpu_idle+0xb2/0x100 (40) >> [<c0111446>] start_secondary+0x296/0x340<6> > > Ingo, > > What's the reason for this printing out in cpu_idle? > > #ifdef CONFIG_DEBUG_PREEMPT > void notrace preempt_enable_no_resched(void) > { > static int once = 1; > > barrier(); > dec_preempt_count(); > > if (once && !preempt_count()) { > once = 0; > printk(KERN_ERR "BUG: %s:%d task might have lost a preemption check! > \n", > current->comm, current->pid); > dump_stack(); > } > } > > EXPORT_SYMBOL(preempt_enable_no_resched); > #endif > > I can understand the above when using preempt_enable_no_resched, when > you know that you still have preemption on, but sometimes (as in > cpu_idle) it is used just before calling schedule. So this check is > pretty much meaningless. > > --- > > KR, > > Does your kernel boot without CONFIG_DEBUG_PREEMPT? > > -- Steve
No. Already tried and got a different dump. Not sure if it was just a dump or a dump initiated by an oops. In an hour or so I will go down and capture that.
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