On Sun, 02 Dec 2007 09:43:39 +0100 Tomas Carnecky <[EMAIL PROTECTED]> wrote:
> WARNING: at arch/x86/kernel/smp_64.c:427 smp_call_function_single() > WARNING: at arch/x86/kernel/smp_64.c:397 smp_call_function_mask() > > dmesg and config attached. > > I'm getting about three of each at boot. I'm running: > commit e1cca7e8d484390169777b423a7fe46c7021fec1 > Date: Thu Nov 29 16:25:29 2007 -0800 > which is the latest git as of yesterday plus a one (unrelated) debug > statement patch in usb uhci. > > There was a similar bug report after 2.6.23-rc8-mm was released. > Though there seems to be a fundamental problem with how people use > smp_call_function*() [1]. And this can just as well be another > incarnation of it. > > Is that easy enough to fix or do I need to bisect (it didn't happen in > 2.6.24-rc3)? > this appears to be a bug in the acpi code, to be exact in processor_throttling.c file, function acpi_processor_set_throttling_ptc(); it disables interrupts and then appears to do a cross-cpu IPI to set the state. Well... we can't do that due to deadlock reasons (you can't do IPI's with interrupts off or you can get a very nice deadlock with the cpu that you IPI trying to do the same thing to you). -- 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/
