smp: Use nr_cpus= to set nr_cpu_ids early

[net-next-2.6.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 736d45602886ea7b08024f246f06e9c7c6dc1a05..51bceb0fb2778564b0dd5383fa13cbbfdad1ad6c 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1772,6 +1772,12 @@ and is between 256 and 4096 characters. It is defined in the file
                        purges which is reported from either PAL_VM_SUMMARY or
                        SAL PALO.
 
+       nr_cpus=        [SMP] Maximum number of processors that an SMP kernel
+                       could support.  nr_cpus=n : n >= 1 limits the kernel to
+                       supporting 'n' processors. Later in runtime you can not
+                       use hotplug cpu feature to put more cpu back to online.
+                       just like you compile the kernel NR_CPUS=n
+
        nr_uarts=       [SERIAL] maximum number of UARTs to be registered.
 
        numa_zonelist_order= [KNL, BOOT] Select zonelist order for NUMA.