Ignore bogus ACPI info for offline CPUs

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Booting a SMP kernel with maxcpus=1 on a SMP system leads to a hard hang,
because ACPI ignores the maxcpus setting and sends timer broadcast info for
the offline CPUs.  This results in a stuck for ever call to
smp_call_function_single() on an offline CPU.

Ignore the bogus information and print a kernel error to remind ACPI
folks to fix it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

...

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Thomas Gleixner 2007-05-23 13:57:30 -07:00 • committed by Linus Torvalds

parent 88f18ba028

commit 72fcde9662

1 changed files with 12 additions and 5 deletions

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17

kernel/time/tick-broadcast.c

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