Messages in this thread | | | Subject | Re: [PATCH] irqtrace-option-off-compile-fix | From | Tim Chen <> | Date | Tue, 11 Jul 2006 12:02:20 -0700 |
| |
On Tue, 2006-07-11 at 20:05 +0200, Arjan van de Ven wrote: > On Tue, 2006-07-11 at 09:36 -0700, Tim Chen wrote: > > On Tue, 2006-07-11 at 19:13 +0200, Arjan van de Ven wrote: > > > On Tue, 2006-07-11 at 09:23 -0700, Tim Chen wrote: > > > > I was testing on x86_64 and turned off the option in > > > > arch/x86_64/Kconfig.debug. > > > > > > > > When the option is turned off, the following functions become undefined: > > > > local_irq_disable() > > > > local_irq_enable() > > > > local_irq_save(flags) > > > > local_irq_restore(flags) > > > > safe_halt() > > > > local_save_flags() > > > > irqs_disabled() > > > > irqs_disabled_flags(flags) > > > > > > > > It seems plausible that some users may want to avoid the overhead of > > > > tracing IRQFLAGS by turning the option off. > > > > > > eh that is a different config option! > > > > My typo, it is TRACE_IRQFLAGS_SUPPORT in arch/x86_64/Kconfig.debug. > > > that should never ever be user setable. That just says if you have > support for the api. > > The one you want is CONFIG_TRACE_IRQFLAGS .. which is the one that > actually turns the tracing on >
I could not turn off CONFIG_TRACE_IRQFLAGS_SUPPORT in .config directly. The command "scripts/kconfig/conf -s arch/x86_64/Kconfig" in Makefile overwrites changes made to CONFIG_TRACE_IRQFLAGS_SUPPORT in .config file. So this is always turned on in .config if the option TRACE_IRQFLAGS_SUPPORT is set in arch/x86_64/Kconfig.debug. I may be missing something. Any suggestions?
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |