linux-kernel - Re: [PATCH] x86: make 32bit MAX_HARDIRQSS_PER_CPU to be NR

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Date:	Wed, 14 Jan 2009 13:38:20 -0800
From:	"Yinghai Lu" <yinghai@...nel.org>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	"Thomas Gleixner" <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: make 32bit MAX_HARDIRQSS_PER_CPU to be NR_VECTORS

On Wed, Jan 14, 2009 at 3:17 AM, Ingo Molnar <mingo@...e.hu> wrote:
>
> * Yinghai Lu <yinghai@...nel.org> wrote:
>
>> Impact: clean up to be same as 64bit
>>
>> 32bit is use per-cpu vector too, so don't use default NR_IRQS
>>
>> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
>>
>> ---
>>  arch/x86/include/asm/hardirq_32.h  |    3 +++
>>  arch/x86/include/asm/irq_vectors.h |    4 ++--
>>  2 files changed, 5 insertions(+), 2 deletions(-)
>>
>> Index: linux-2.6/arch/x86/include/asm/hardirq_32.h
>> ===================================================================
>> --- linux-2.6.orig/arch/x86/include/asm/hardirq_32.h
>> +++ linux-2.6/arch/x86/include/asm/hardirq_32.h
>> @@ -20,6 +20,9 @@ typedef struct {
>>
>>  DECLARE_PER_CPU(irq_cpustat_t, irq_stat);
>>
>> +/* We can have at most NR_VECTORS irqs routed to a cpu at a time */
>> +#define MAX_HARDIRQS_PER_CPU NR_VECTORS
>> +
>>  #define __ARCH_IRQ_STAT
>>  #define __IRQ_STAT(cpu, member) (per_cpu(irq_stat, cpu).member)
>
> applied to tip/x86/cleanups. Btw., isnt the irq_vectors.h bit (mentioned
> in the diffstat) missing?
>

copy and modify the patch
forget to do quilt refresh --diffstat

YH
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