2007/7/26, Ingo Molnar <mingo@xxxxxxx>: > (..) > yeah - i meant to cover both arches but forgot about x86_64 - updated > patch attached below. > > Ingo > > -----------------> > Subject: x86: activate HARDIRQS_SW_RESEND > From: Ingo Molnar <mingo@xxxxxxx> > > activate the software-triggered IRQ-resend logic. > > it appears some chipsets/cpus do not handle local-APIC driven IRQ > resends all that well, so always use the soft mechanism to trigger > the execution of pending interrupts. > > Signed-off-by: Ingo Molnar <mingo@xxxxxxx> > --- > arch/i386/Kconfig | 4 ++++ > arch/x86_64/Kconfig | 4 ++++ > kernel/irq/manage.c | 8 ++++++++ > 3 files changed, 16 insertions(+) > > Index: linux-rt-rebase.q/arch/i386/Kconfig > =================================================================== > --- linux-rt-rebase.q.orig/arch/i386/Kconfig > +++ linux-rt-rebase.q/arch/i386/Kconfig > @@ -1284,6 +1284,10 @@ config GENERIC_PENDING_IRQ > depends on GENERIC_HARDIRQS && SMP > default y > > +config HARDIRQS_SW_RESEND > + bool > + default y > + > config X86_SMP > bool > depends on SMP && !X86_VOYAGER > Index: linux-rt-rebase.q/arch/x86_64/Kconfig > =================================================================== > --- linux-rt-rebase.q.orig/arch/x86_64/Kconfig > +++ linux-rt-rebase.q/arch/x86_64/Kconfig > @@ -721,6 +721,10 @@ config GENERIC_PENDING_IRQ > depends on GENERIC_HARDIRQS && SMP > default y > > +config HARDIRQS_SW_RESEND > + bool > + default y > + > menu "Power management options" > > source kernel/power/Kconfig > Index: linux-rt-rebase.q/kernel/irq/manage.c > =================================================================== > --- linux-rt-rebase.q.orig/kernel/irq/manage.c > +++ linux-rt-rebase.q/kernel/irq/manage.c > @@ -175,6 +175,14 @@ void enable_irq(unsigned int irq) > desc->depth--; > } > spin_unlock_irqrestore(&desc->lock, flags); > +#ifdef CONFIG_HARDIRQS_SW_RESEND > + /* > + * Do a bh disable/enable pair to trigger any pending > + * irq resend logic: > + */ > + local_bh_disable(); > + local_bh_enable(); > +#endif > } > EXPORT_SYMBOL(enable_irq); This patch didn't help (tested on 2.6.22.1) - ne2k_pci timed out. ps: I retested all patches posted in this thread on top of 2.6.22.1 and behavior from 2.6.21.3 didn't changed. My next tests will be on 2.6.22.x only. Regards, Marcin Slusarz - To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
