linux-kernel - Re: Why do we still have 32 bit counters? Interrupt counters overflow within 50 days

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Message-ID: <20141003120345.GA6652@localhost.localdomain>
Date:	Fri, 3 Oct 2014 14:03:45 +0200
From:	Richard Cochran <richardcochran@...il.com>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org
Subject: Re: Why do we still have 32 bit counters? Interrupt counters
 overflow within 50 days

On Fri, Oct 03, 2014 at 06:54:22AM -0500, Christoph Lameter wrote:
> Subject: Increase irq counters to 64 bit

...

> Index: linux/arch/x86/include/asm/processor.h
> ===================================================================
> --- linux.orig/arch/x86/include/asm/processor.h
> +++ linux/arch/x86/include/asm/processor.h
> @@ -432,7 +432,7 @@ DECLARE_PER_CPU_FIRST(union irq_stack_un
>  DECLARE_INIT_PER_CPU(irq_stack_union);
> 
>  DECLARE_PER_CPU(char *, irq_stack_ptr);
> -DECLARE_PER_CPU(unsigned int, irq_count);
> +DECLARE_PER_CPU(unsigned long, irq_count);

Still 32 bit on 32 bit machines...

Thanks,
Richard
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