linux-kernel - Re: [PATCH v4 7/7] x86/tlb: add tlb_flushall_factor into sysfs for user testing/tuning

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Date:	Fri, 11 May 2012 08:52:09 +0800
From:	Alex Shi <alex.shi@...el.com>
To:	Borislav Petkov <bp@...64.org>
CC:	rob@...dley.net, tglx@...utronix.de, mingo@...hat.com,
	hpa@...or.com, arnd@...db.de, rostedt@...dmis.org,
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	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 7/7] x86/tlb: add tlb_flushall_factor into sysfs for
 user testing/tuning

>> +#ifdef CONFIG_DEBUG_TLBFLUSH

>> +static ssize_t __tlb_flushall_factor_store(const char *buf,
>> +					size_t count, int smt)
>> +{
>> +	short factor = 0;
>> +
>> +	if (sscanf(buf, "%hd", &factor) != 1)
>> +		return -EINVAL;
> 
> This means only single-digit factors, right?


No, you can try '32' '16' etc. not a 'single-digit'.

> 
> Why not use kstrtoul?


any advantage of this?

> 


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