On Mon, Feb 28, 2005 at 09:58:54AM +0900, Kenji Kaneshige wrote: > Hi Tony, > > I had a good discussion about vector sharing patch with > Ashok Raj (Thank you Ashok!!) and I made change to it based > on the comments from him. > > Summary of Changes are: > - Removed sharable flag from iosapic_itr_info structure > - Made NR_RTE_CACHE_ENTRIES configurable > > Attached patch is against 2.6.11-rc5. > > Thanks, > Kenji Kaneshige > > > Current ia64 linux cannot handle greater than 184 interrupt sources > because of the lack of vectors. The following patch enables ia64 linux > to handle greater than 184 interrupt sources by allowing the same > vector number to be shared by multiple IOSAPIC's RTEs. The design of > this patch is besed on "Intel(R) Itanium(R) Processor Family Interrupt > Architecture Guide". > > Even if you don't have a large I/O system, you can see the behavior of > vector sharing by changing IOSAPIC_LAST_DEVICE_VECTOR to fewer value. > > Signed-off-by: Kenji Kaneshige <[EMAIL PROTECTED]> > > > --- > > linux-2.6.11-rc5-kanesige/arch/ia64/Kconfig | 8 > linux-2.6.11-rc5-kanesige/arch/ia64/kernel/iosapic.c | 356 > +++++++++++++----- > linux-2.6.11-rc5-kanesige/arch/ia64/kernel/irq_ia64.c | 16 > linux-2.6.11-rc5-kanesige/include/asm-ia64/hw_irq.h | 1 > 4 files changed, 291 insertions(+), 90 deletions(-) > > diff -puN arch/ia64/Kconfig~vector_sharing arch/ia64/Kconfig > --- linux-2.6.11-rc5/arch/ia64/Kconfig~vector_sharing 2005-02-25 > 09:08:18.000000000 +0900 > +++ linux-2.6.11-rc5-kanesige/arch/ia64/Kconfig 2005-02-25 > 09:08:18.000000000 +0900 > @@ -318,6 +318,14 @@ config ACPI_DEALLOCATE_IRQ > depends on IOSAPIC && EXPERIMENTAL > default y > > +config NR_RTE_CACHES > + int "Number of RTE cache entries" > + depends on IOSAPIC > + default "256" > + help > + If your system panic with the message "out of rte cache > + entries!(shortage: XX)", please set this to a larger value.
This screams for dynamic allocation of the underlying structures, no? - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
