diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2009-09-18 17:40:49 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2009-09-18 17:40:49 +0200 |
| commit | 82c07cbbdf7d44564497122eb6d984ffe2497fa3 (patch) | |
| tree | b096c80dfa40146f7f8e8918025ee3f981ac0d1b | |
| parent | 0dfea57f1f486188303e598f96f0f92995bf9276 (diff) | |
x86: Disable SPARSE_IRQ, DMAR, INTR_REMAP when PREEMPT_RT=y
Memory allocations in irq/preempt disabled regions is the main cause
of grief with these features. Needs some real work to get that solved.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | arch/x86/Kconfig | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 2ddf28660323..bc240958bdac 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -281,6 +281,7 @@ config X86_X2APIC config SPARSE_IRQ bool "Support sparse irq numbering" depends on PCI_MSI || HT_IRQ + depends on !PREEMPT_RT ---help--- This enables support for sparse irqs. This is useful for distro kernels that want to define a high CONFIG_NR_CPUS value but still @@ -1902,7 +1903,7 @@ config PCI_MMCONFIG config DMAR bool "Support for DMA Remapping Devices (EXPERIMENTAL)" - depends on PCI_MSI && ACPI && EXPERIMENTAL + depends on PCI_MSI && ACPI && EXPERIMENTAL && !PREEMPT_RT help DMA remapping (DMAR) devices support enables independent address translations for Direct Memory Access (DMA) from devices. @@ -1945,6 +1946,7 @@ config DMAR_FLOPPY_WA config INTR_REMAP bool "Support for Interrupt Remapping (EXPERIMENTAL)" depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL + depends on !PREEMPT_RT ---help--- Supports Interrupt remapping for IO-APIC and MSI devices. To use x2apic mode in the CPU's which support x2APIC enhancements or |