linux-kernel - Re: [PATCH 3/3] x86, cacheinfo: Calculate L3 indexes

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Date:	Thu, 21 Jan 2010 17:31:58 +0100
From:	Borislav Petkov <bp@...64.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	mingo@...e.hu, tglx@...utronix.de, andreas.herrmann3@....com,
	x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] x86, cacheinfo: Calculate L3 indexes

On Wed, Jan 20, 2010 at 03:15:31PM -0800, H. Peter Anvin wrote:
> On 01/19/2010 03:07 AM, Borislav Petkov wrote:
> > We need to know the valid L3 indexes interval when disabling them over
> > /sysfs. Do that when the core is brought online and add boundary checks
> > to the sysfs .store attribute.
> > 
> > Signed-off-by: Borislav Petkov <borislav.petkov@....com>
> > @@ -161,6 +162,7 @@ struct _cpuid4_info_regs {
> >  	union _cpuid4_leaf_ecx ecx;
> >  	unsigned long size;
> >  	unsigned long can_disable;
> > +	unsigned int l3_indexes;
> >  };
> >  
> 
> Hmmm... 32, 64, 64, 32 bits... we could move up the l3_indexes variable
> here.   However, more likely is that "size" and "can_disable" have no
> business being unsigned long in the first place -- especially the latter
> seems to be actually used as a boolean, and really should be "bool".

good point.

> Second, the preferred plural of "index" is "indices" (although both are
> correct and present in the kernel source.)

done.

-- 
Regards/Gruss,
Boris.

-
Advanced Micro Devices, Inc.
Operating Systems Research Center
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