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author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-02 14:44:09 -0500 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-02 14:44:09 -0500 |
commit | b840d79631c882786925303c2b0f4fefc31845ed (patch) | |
tree | cda60a95d4507fe1321fc285af38982d7eb9693b /Documentation | |
parent | 597b0d21626da4e6f09f132442caf0cc2b0eb47c (diff) | |
parent | c3d80000e3a812fe5a200d6bde755fbd7fa65481 (diff) |
Merge branch 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (66 commits)
x86: export vector_used_by_percpu_irq
x86: use logical apicid in x2apic_cluster's x2apic_cpu_mask_to_apicid_and()
sched: nominate preferred wakeup cpu, fix
x86: fix lguest used_vectors breakage, -v2
x86: fix warning in arch/x86/kernel/io_apic.c
sched: fix warning in kernel/sched.c
sched: move test_sd_parent() to an SMP section of sched.h
sched: add SD_BALANCE_NEWIDLE at MC and CPU level for sched_mc>0
sched: activate active load balancing in new idle cpus
sched: bias task wakeups to preferred semi-idle packages
sched: nominate preferred wakeup cpu
sched: favour lower logical cpu number for sched_mc balance
sched: framework for sched_mc/smt_power_savings=N
sched: convert BALANCE_FOR_xx_POWER to inline functions
x86: use possible_cpus=NUM to extend the possible cpus allowed
x86: fix cpu_mask_to_apicid_and to include cpu_online_mask
x86: update io_apic.c to the new cpumask code
x86: Introduce topology_core_cpumask()/topology_thread_cpumask()
x86: xen: use smp_call_function_many()
x86: use work_on_cpu in x86/kernel/cpu/mcheck/mce_amd_64.c
...
Fixed up trivial conflict in kernel/time/tick-sched.c manually
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/cpu-hotplug.txt | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/Documentation/cpu-hotplug.txt b/Documentation/cpu-hotplug.txt index 94bbc27ddd4f..9d620c153b04 100644 --- a/Documentation/cpu-hotplug.txt +++ b/Documentation/cpu-hotplug.txt | |||
@@ -50,16 +50,17 @@ additional_cpus=n (*) Use this to limit hotpluggable cpus. This option sets | |||
50 | cpu_possible_map = cpu_present_map + additional_cpus | 50 | cpu_possible_map = cpu_present_map + additional_cpus |
51 | 51 | ||
52 | (*) Option valid only for following architectures | 52 | (*) Option valid only for following architectures |
53 | - x86_64, ia64 | 53 | - ia64 |
54 | 54 | ||
55 | ia64 and x86_64 use the number of disabled local apics in ACPI tables MADT | 55 | ia64 uses the number of disabled local apics in ACPI tables MADT to |
56 | to determine the number of potentially hot-pluggable cpus. The implementation | 56 | determine the number of potentially hot-pluggable cpus. The implementation |
57 | should only rely on this to count the # of cpus, but *MUST* not rely on the | 57 | should only rely on this to count the # of cpus, but *MUST* not rely |
58 | apicid values in those tables for disabled apics. In the event BIOS doesn't | 58 | on the apicid values in those tables for disabled apics. In the event |
59 | mark such hot-pluggable cpus as disabled entries, one could use this | 59 | BIOS doesn't mark such hot-pluggable cpus as disabled entries, one could |
60 | parameter "additional_cpus=x" to represent those cpus in the cpu_possible_map. | 60 | use this parameter "additional_cpus=x" to represent those cpus in the |
61 | cpu_possible_map. | ||
61 | 62 | ||
62 | possible_cpus=n [s390 only] use this to set hotpluggable cpus. | 63 | possible_cpus=n [s390,x86_64] use this to set hotpluggable cpus. |
63 | This option sets possible_cpus bits in | 64 | This option sets possible_cpus bits in |
64 | cpu_possible_map. Thus keeping the numbers of bits set | 65 | cpu_possible_map. Thus keeping the numbers of bits set |
65 | constant even if the machine gets rebooted. | 66 | constant even if the machine gets rebooted. |