Re: [PATCH 11/14] x86: Populate cpu_enabled_map
From: H. Peter Anvin
Date: Fri Jul 18 2008 - 16:01:14 EST
Alex Chiang wrote:
Populate the cpu_enabled_map correctly.
Note that this patch does not actually make any decisions based
on the contents of the map.
However, as the map is presented via sysfs in:
It should be populated correctly.
There will be a user-visible change under the above directory.
cpuN/ entries for firmware-disabled CPUs will now appear, whereas
before, they did not due to a check against ACPI_MADT_ENABLED.
The cpuN/ entries will be empty, and the online file in the
above directory will reflect which CPUs are actually schedulable.
Signed-off-by: Alex Chiang <achiang@xxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
From an x86 standpoint this patchset seems reasonable to me.
Acked-by: H. Peter Anvin <hpa@xxxxxxxxx>
Since it is a panarch patchset it presumably should go via -mm rather
than in the arch trees, so I'm not going to add it to -tip.
Obviously, if the sematics of the operations don't make sense for other
architectures -- which I will leave up to the affected maintainers --
then that should be carefully considered if the generic operations can
be done better.
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