| Message ID | 20130812200301.GB4181@breakpoint.cc (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Monday 12 August 2013 08:03 PM, Sebastian Andrzej Siewior wrote: > From: Thomas Gleixner <tglx@linutronix.de> > > All timer interrupts and the perf interrupt are marked NO_THREAD, so > its safe to allow forced interrupt threading. > > Signed-off-by: Thomas Gleixner <tglx@linutronix.de> > Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> > --- > On Thu, Feb 14, 2013 at 11:04:48PM +0100, Thomas Gleixner wrote: >> On Thu, 14 Feb 2013, Russell King - ARM Linux wrote: >> >>> What effect does this have on IRQ latency, particularly on the slower CPUs? >> >> It does not affect anything unless you add "threadirqs" to the kernel >> command line. This command line argument puts the kernel into forced >> irq threading mode. Otherwise it just works as now. > > I reposted the patch since it no longer applies clean on v3.11-rc5. From what > tglx explained, I don't think there are any outstanding issues, are there? > > arch/arm/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > index 43594d5..405e4c0 100644 > --- a/arch/arm/Kconfig > +++ b/arch/arm/Kconfig > @@ -20,6 +20,7 @@ config ARM > select GENERIC_STRNCPY_FROM_USER > select GENERIC_STRNLEN_USER > select HARDIRQS_SW_RESEND > + select IRQ_FORCED_THREADING Please add in alphabetic sorted order. > select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL > select HAVE_ARCH_KGDB > select HAVE_ARCH_SECCOMP_FILTER Thanks, Sekhar
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 43594d5..405e4c0 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -20,6 +20,7 @@ config ARM select GENERIC_STRNCPY_FROM_USER select GENERIC_STRNLEN_USER select HARDIRQS_SW_RESEND + select IRQ_FORCED_THREADING select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL select HAVE_ARCH_KGDB select HAVE_ARCH_SECCOMP_FILTER