x86: MSI start irq numbering from nr_irqs_gsi

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Impact: sanitize MSI irq number ordering from top-down to bottom-up

Increase new MSI IRQs starting from nr_irqs_gsi (which is somewhere below
256), instead of decreasing from NR_IRQS. (The latter method can result
in confusingly high IRQ numbers - if NR_CPUS is set to a high value and
NR_IRQS scales up to a high value.)

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Yinghai Lu 2008-12-05 18:58:33 -08:00 • committed by Ingo Molnar

parent 99d093d128

commit be5d5350a9

3 changed files with 19 additions and 9 deletions

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2

arch/x86/include/asm/io_apic.h

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24

arch/x86/kernel/io_apic.c

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2

arch/x86/kernel/setup.c

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