x86: fix stack overflow for large values of MAX_APICS

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physid_mask_of_physid() causes a huge stack (12k) to be created if the
number of APICS is large. Replace physid_mask_of_physid() with a
new function that does not create large stacks. This is a problem only
on large x86_64 systems.

this paves the way to increase MAX_APICS.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Cc: linux-mm@kvack.org
Cc: mingo@elte.hu
Cc: tglx@linutronix.de
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

This commit is contained in:

Jack Steiner 2008-06-19 21:51:05 -05:00 • committed by Ingo Molnar

parent d400524aff

commit b6df1b8bc1

4 changed files with 11 additions and 5 deletions

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2

arch/x86/kernel/apic_32.c

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2

arch/x86/kernel/apic_64.c

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5

arch/x86/kernel/smpboot.c

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7

include/asm-x86/mpspec.h

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