On Mon, 2005-02-14 at 12:40 -0800, Mark Gross wrote: > I'm working on a tweak to the preepmtive soft IRQ implementation using work > queues and I'm having problems with a BUG assert when trying to queue_work. > > Souldn't I be able to call queue_work form ISR context?
Yes, but not with interrupts disabled. > > --mgross > > --------------------------- > | preempt count: 00000001 ] > | 1-level deep critical section nesting: > ---------------------------------------- > .. [<c0140f5d>] .... print_traces+0x1d/0x60 > .....[<c01042a3>] .. ( <= dump_stack+0x23/0x30) > > BUG: sleeping function called from invalid context IRQ 20(2039) at kernel/rt.c > in_atomic():0 [00000000], irqs_disabled():1 Here you have interrupts disabled. Since you are tweaking the softirq I don't know your code, but the kernel should not schedule after turning off interrupts, and the spinlocks under the PREEMPT kernel, may now sleep (unless they are raw_spin_locks). Here we also see that queue_work calls spin_lock_irqsave. I'm suspecting that you turned off interrupts somewhere. -- Steve - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
