Tony Lindgren <[email protected]> wrote:
> --- linux-dev.orig/arch/i386/kernel/irq.c 2005-06-01 17:51:36.000000000 -0700
> +++ linux-dev/arch/i386/kernel/irq.c 2005-06-01 17:54:32.000000000 -0700
> [...]
> @@ -102,6 +103,12 @@ fastcall unsigned int do_IRQ(struct pt_r
> );
> } else
> #endif
> +
> +#ifdef CONFIG_NO_IDLE_HZ
> + if (dyn_tick->state & (DYN_TICK_ENABLED | DYN_TICK_SKIPPING) && irq != 0)
> + dyn_tick->interrupt(irq, NULL, regs);
> +#endif
> +
> __do_IRQ(irq, regs);
Forgive me if I'm being obtuse (again...), but this hunk doesn't look
like it would work well in the 4K stacks case. When 4K stacks are being
used, dyn_tick->interrupt() will only get called in the nested interrupt
case, when the interrupt stack is already in use. This change also
pushes the non-assembly __do_IRQ() call out of the else branch, meaning
that, when the switch is made to the interrupt stack (most of the time),
__do_IRQ() will be called twice for the same interrupt.
It looks to me like you want to put your #ifdef chunk *after* the call
to __do_IRQ(), unless you have some reason for needing it to happen
before the regular interrupt handler is invoked.
What am I missing?
jon
Jonathan Corbet
Executive editor, LWN.net
[email protected]
-
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/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]