From: jbarnes@sgi.com (Jesse Barnes)
To: linux-ia64@vger.kernel.org
Subject: [PATCH] update Kconfig comment for NR_CPUS
Date: Tue, 09 Sep 2003 23:57:03 +0000 [thread overview]
Message-ID: <marc-linux-ia64-106315215800794@msgid-missing> (raw)
Noticed this when I built a kernel for a 256p machine.
Jesse
=== arch/ia64/Kconfig 1.42 vs edited ==--- 1.42/arch/ia64/Kconfig Mon Sep 8 16:15:14 2003
+++ edited/arch/ia64/Kconfig Tue Sep 9 16:55:14 2003
@@ -424,9 +424,15 @@
support" (CONFIG_PROC_FS) is enabled, too.
config NR_CPUS
- int "Maximum number of CPUs (2-64)"
+ int "Maximum number of CPUs"
depends on SMP
default "64"
+ help
+ You should set this to the number of CPUs in your system, but
+ keep in mind that a kernel compiled for e.g. 2 CPUs will boot but
+ only use 2 CPUs on a >2 CPU system. Setting this to a value larger
+ than 64 will cause the use of a CPU mask array, causing a small
+ performance hit.
source "fs/Kconfig.binfmt"
reply other threads:[~2003-09-09 23:57 UTC|newest]
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