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yaml
---
r: 108241
b: refs/heads/master
c: 3ee1062
h: refs/heads/master
i:
  108239: 297acbd
v: v3
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Heiko Carstens authored and Linus Torvalds committed Aug 12, 2008
1 parent e3e21ae commit 2386dc0
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Showing 3 changed files with 2 additions and 7 deletions.
2 changes: 1 addition & 1 deletion [refs]
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@@ -1,2 +1,2 @@
---
refs/heads/master: 74768ed833344bb0f82b97cee46320a3d7f09ecd
refs/heads/master: 3ee1062b4ee82a56294808a065b64f4bc6781a56
5 changes: 0 additions & 5 deletions trunk/Documentation/cpu-hotplug.txt
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Expand Up @@ -59,15 +59,10 @@ apicid values in those tables for disabled apics. In the event BIOS doesn't
mark such hot-pluggable cpus as disabled entries, one could use this
parameter "additional_cpus=x" to represent those cpus in the cpu_possible_map.

s390 uses the number of cpus it detects at IPL time to also the number of bits
in cpu_possible_map. If it is desired to add additional cpus at a later time
the number should be specified using this option or the possible_cpus option.

possible_cpus=n [s390 only] use this to set hotpluggable cpus.
This option sets possible_cpus bits in
cpu_possible_map. Thus keeping the numbers of bits set
constant even if the machine gets rebooted.
This option overrides additional_cpus.

CPU maps and such
-----------------
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2 changes: 1 addition & 1 deletion trunk/kernel/cpu.c
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Expand Up @@ -369,7 +369,7 @@ int __cpuinit cpu_up(unsigned int cpu)
if (!cpu_isset(cpu, cpu_possible_map)) {
printk(KERN_ERR "can't online cpu %d because it is not "
"configured as may-hotadd at boot time\n", cpu);
#if defined(CONFIG_IA64) || defined(CONFIG_X86_64) || defined(CONFIG_S390)
#if defined(CONFIG_IA64) || defined(CONFIG_X86_64)
printk(KERN_ERR "please check additional_cpus= boot "
"parameter\n");
#endif
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