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| author | Thomas Gleixner | 2008-10-05 16:52:24 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2008-10-13 10:33:46 +0200 |
| commit | 649c6653fa94ec8f3ea32b19c97b790ec4e8e4ac (patch) | |
| tree | a6c3c0f48147ebcd9eca8d5e0e188f36477705e9 /arch/x86/kernel/smpboot.c | |
| parent | dumpstack: x86: various small unification steps (diff) | |
| download | kernel-qcow2-linux-649c6653fa94ec8f3ea32b19c97b790ec4e8e4ac.tar.gz kernel-qcow2-linux-649c6653fa94ec8f3ea32b19c97b790ec4e8e4ac.tar.xz kernel-qcow2-linux-649c6653fa94ec8f3ea32b19c97b790ec4e8e4ac.zip | |
x86: improve UP kernel when CPU-hotplug and SMP is enabled
num_possible_cpus() can be > 1 when disabled CPUs have been accounted.
Disabled CPUs are not in the cpu_present_map, so we can use
num_present_cpus() as a safe indicator to switch to UP alternatives.
Reported-by: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
0 files changed, 0 insertions, 0 deletions