On Friday, June 21, 2013 05:09:18 PM Hanjun Guo wrote: > More than 256 entries in ACPI MADT is supported from ACPI 3.0, so the > information should be updated. > > -v2: Rephrase the information instead of simply removing it according > to Rafael's advice. Queued up for 3.11. Thanks, Rafael > Suggested-by: Rafael J. Wysocki <rjw@xxxxxxx> > Signed-off-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx> > --- > Documentation/cpu-hotplug.txt | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/Documentation/cpu-hotplug.txt b/Documentation/cpu-hotplug.txt > index 9f40135..67f733d 100644 > --- a/Documentation/cpu-hotplug.txt > +++ b/Documentation/cpu-hotplug.txt > @@ -370,8 +370,10 @@ A: There is no clear spec defined way from ACPI that can give us that > CPUs in MADT as hotpluggable CPUS. In the case there are no disabled CPUS > we assume 1/2 the number of CPUs currently present can be hotplugged. > > - Caveat: Today's ACPI MADT can only provide 256 entries since the apicid field > - in MADT is only 8 bits. > + Caveat: ACPI MADT can only provide 256 entries in systems with only ACPI 2.0c > + or earlier ACPI version supported, because the apicid field in MADT is only > + 8 bits. From ACPI 3.0, this limitation was removed since the apicid field > + was extended to 32 bits with x2APIC introduced. > > User Space Notification > > -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
