From 7abc197e3fe79cc2ddcb11b78cab925287d812f3 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Wed, 14 Dec 2011 01:03:49 +0100 Subject: 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 diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 8b866b2..989e191 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -775,7 +775,7 @@ config IOMMU_HELPER config MAXSMP bool "Enable Maximum number of SMP Processors and NUMA Nodes" depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL - 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 75cdb77..7669d65 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -315,6 +315,7 @@ 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 -- cgit v0.10.2