From 76606fcb9c8ce393b6a414f506c60f97ef09b76b Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Wed, 14 Dec 2011 01:03:49 +0100 Subject: [PATCH] cpumask: Disable CONFIG_CPUMASK_OFFSTACK for RT We can't deal with the cpumask allocations which happen in atomic context (see arch/x86/kernel/apic/io_apic.c) on RT right now. Signed-off-by: Thomas Gleixner --- arch/x86/Kconfig | 2 +- lib/Kconfig | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 509cafea7ef0..bd66c23de3fb 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -812,7 +812,7 @@ config IOMMU_HELPER config MAXSMP bool "Enable Maximum number of SMP Processors and NUMA Nodes" depends on X86_64 && SMP && DEBUG_KERNEL - select CPUMASK_OFFSTACK + select CPUMASK_OFFSTACK if !PREEMPT_RT_FULL ---help--- Enable maximum number of CPUS and NUMA Nodes for this architecture. If unsure, say N. diff --git a/lib/Kconfig b/lib/Kconfig index 991c98bc4a3f..d20e75d4a55b 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -357,6 +357,7 @@ config CHECK_SIGNATURE config CPUMASK_OFFSTACK bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS + depends on !PREEMPT_RT_FULL help Use dynamic allocation for cpumask_var_t, instead of putting them on the stack. This is a bit more expensive, but avoids