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Message-ID: <4FAD0B3A.4060705@intel.com>
Date: Fri, 11 May 2012 20:51:06 +0800
From: Alex Shi <alex.shi@...el.com>
To: Peter Zijlstra <peterz@...radead.org>
CC: rob@...dley.net, tglx@...utronix.de, mingo@...hat.com,
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Subject: Re: [PATCH v4 5/7] x86/tlb: add tlb flush all factor for specific
CPU
On 05/11/2012 05:04 PM, Peter Zijlstra wrote:
> On Fri, 2012-05-11 at 11:04 +0200, Peter Zijlstra wrote:
>
>>> NO, the first judgement is from CPU. But second '-1' is may from user
>>> setting in sysfs.
>>
>> Then you're doing it wrong. Don't allow setting the sysfs variable if !
>> cpu_has_invlpg.
>
> Better yet, don't create the sysfs file at all in that case.
Yes, true.
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