1 files changed, 4 insertions, 2 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index f67e839f06c8..f03e428112eb 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -825,14 +825,16 @@ config MAXSMP
 config NR_CPUS
         int "Maximum number of CPUs" if SMP && !MAXSMP
         range 2 8 if SMP && X86_32 && !X86_BIGSMP
-        range 2 512 if SMP && !MAXSMP
+        range 2 512 if SMP && !MAXSMP && !CPUMASK_OFFSTACK
+        range 2 4096 if SMP && !MAXSMP && CPUMASK_OFFSTACK && X86_64
         default "1" if !SMP
         default "4096" if MAXSMP
         default "32" if SMP && (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000)
         default "8" if SMP
         ---help---
           This allows you to specify the maximum number of CPUs which this
-          kernel will support.  The maximum supported value is 512 and the
+          kernel will support.  If CPUMASK_OFFSTACK is enabled, the maximum
+          supported value is 4096, otherwise the maximum value is 512.  The
           minimum value which makes sense is 2.
 
           This is purely to save memory - each supported CPU adds