Hi Robert, On Tue, Sep 23, 2014 at 11:44:31AM +0100, Robert Richter wrote: > On 08.09.14 13:44:48, Robert Richter wrote: > > From: Robert Richter <[email protected]> > > > > Raising the current maximum limit to 64. This is needed for Cavium's > > Thunder systems that will have at least 48 cores per die. > > > > The change keeps the current memory footprint in cpu mask structures. > > It does not break existing code. Setting the maximum to 64 cpus still > > boots systems with less cpus. > > > > Mark's Juno happily booted with a NR_CPUS=64 kernel. > > > > Tested on our Thunder system with 48 cores. We could see interrupts to > > all cores. > > Catalin, Will, > > please consider applying this patch.
This is already in the arm64 for-next/core branch [1]. Mark. [1] https://git.kernel.org/cgit/linux/kernel/git/arm64/linux.git/commit/?h=for-next/core&id=e3672649faae400e8a598938766a63f395a27ae6 > > Thanks, > > -Robert > > > > > Cc: Radha Mohan Chintakuntla <[email protected]> > > Cc: Mark Rutland <[email protected]> > > Signed-off-by: Robert Richter <[email protected]> > > --- > > arch/arm64/Kconfig | 6 +++--- > > 1 file changed, 3 insertions(+), 3 deletions(-) > > > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > > index fd4e81a4e1ce..67fca2ea81a7 100644 > > --- a/arch/arm64/Kconfig > > +++ b/arch/arm64/Kconfig > > @@ -252,11 +252,11 @@ config SCHED_SMT > > places. If unsure say N here. > > > > config NR_CPUS > > - int "Maximum number of CPUs (2-32)" > > - range 2 32 > > + int "Maximum number of CPUs (2-64)" > > + range 2 64 > > depends on SMP > > # These have to remain sorted largest to smallest > > - default "8" > > + default "64" > > > > config HOTPLUG_CPU > > bool "Support for hot-pluggable CPUs" > > -- > > 2.0.1 > > > -- 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/
