linux-kernel - Re: [linux41] regression with 'x86/cacheinfo: Move cacheinfo sysfs code to generic infrastructure' on AMD i686

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Message-ID: <55B5069A.8070209@roeck-us.net>
Date:	Sun, 26 Jul 2015 09:11:06 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Philip Müller <philm@...jaro.org>,
	Borislav Petkov <bp@...en8.de>
CC:	Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org,
	Sudeep Holla <sudeep.holla@....com>, manjaro-dev@...jaro.org,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andre Przywara <andre.przywara@....com>,
	Borislav Petkov <bp@...e.de>
Subject: Re: [linux41] regression with 'x86/cacheinfo: Move cacheinfo sysfs
 code to generic infrastructure' on AMD i686

On 07/26/2015 08:59 AM, Philip Müller wrote:
> Hi Borislav,
>
> I'm fine with that decision. I tested your patch alone and the
> combination with Thomas' changes. Both work to solve this problem.
>
> Do whatever suits best for this matter. Thx to you too for providing
> solutions so fast.
>
> kind regards
> Philip
>
> p.s. what do you mean by top-post?
>

What you just did ;-).

http://ck.wikia.com/wiki/TopPosting

Guenter

> Am 26.07.2015 um 16:42 schrieb Borislav Petkov:
>> On Sun, Jul 26, 2015 at 12:54:55PM +0200, Philip Müller wrote:
>>> I can confirm your patch working. However, it might be good to use yours
>>> and Thomas' in combination to solve this properly.
>>
>> Please do not top-post.
>>
>> We could use Thomas' too although from looking at it,
>> detect_cache_attributes() allocates a per-CPU per_cpu_cacheinfo thing
>> for each CPU. By the time we hit cache_shared_cpu_map_remove() in
>> free_cache_attributes(), those per_cpu_cacheinfo(cpu) things are still
>> allocated. We kfree them in the next step only.
>>
>> But I like the moving of the check from the CPU hotplug callback to
>> free_cache_attributes().
>>
>> So I'll merge the two patches and write up a proper commit message,
>> unless someone objects.
>>
>> I'll add your Tested-by too.
>>
>> Thanks.
>>
>
>

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