Re: [PATCH] ARM64: Dynamically allocate cpumasks and increase supported CPUs to 512
From: "Russell King (Oracle)" <linux@armlinux.org.uk>
Date: 2024-01-15 15:39:13
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On Thu, Dec 14, 2023 at 04:05:56PM -0800, Christoph Lameter (Ampere) wrote:
quoted hunk ↗ jump to hunk
Index: linux/arch/arm64/Kconfig ===================================================================--- linux.orig/arch/arm64/Kconfig +++ linux/arch/arm64/Kconfig@@ -1407,7 +1407,21 @@ config SCHED_SMT config NR_CPUS int "Maximum number of CPUs (2-4096)" range 2 4096
I think your mailer got to your patch and messed up the white space. There are two spaces before each of these lines rather than the usual one.
- default "256" + default 512 + +# +# Determines the placement of cpumasks. +# +# With CPUMASK_OFFSTACK the cpumasks are dynamically allocated. +# Useful for machines with lots of core because it avoids increasing +# the size of many of the data structures in the kernel. +# +# If this is off then the cpumasks have a static sizes and are +# embedded within data structures. +# +config CPUMASK_OFFSTACK + def_bool y + depends on NR_CPUS > 256
Should that be ">= 256" ?
config HOTPLUG_CPU bool "Support for hot-pluggable CPUs"
Same here. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel