Re: [PATCH v2] powerpc/64s: introduce CONFIG_MAXSMP to test very large SMP

Christophe Leroy [off-list ref] writes:

Le 09/11/2021 à 07:51, Nicholas Piggin a écrit :

...

quoted

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index a208997ade88..14c275e0ff93 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype

@@ -475,9 +475,14 @@ config SMP
  
  	  If you don't know what to do here, say N.
  
+# MAXSMP sets 8192 if COMPILE_TEST because that's what x86 has flushed out.
+# Exceeding that will cause a lot of compile errors. Have to deal with those
+# first.
  config NR_CPUS
-	int "Maximum number of CPUs (2-8192)" if SMP
-	range 2 8192 if SMP
+	int "Maximum number of CPUs (2-8192)" if SMP && !MAXSMP
+	range 2 16384 if SMP
+	default 16384 if MAXSMP && !COMPILE_TEST
+	default 8192 if MAXSMP && COMPILE_TEST

You can do less complex. First hit becomes the default, so you can do:

	default 8192 if MAXSMP && COMPILE_TEST
	default 16384 if MAXSMP

I did that when applying.

cheers