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From: Kay Sievers <kay.sievers@vrfy.org>
Date: Wed, 29 Sep 2010 15:39:58 +0200
Message-ID: <AANLkTi=uqVA5XGNKLg8=saXzWM5FA6KNP9fsAj80si_q@mail.gmail.com>
Subject: Re: [PATCH 0/8] v2 De-Couple sysfs memory directories from memory
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To: Greg KH <greg@kroah.com>
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Cc: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org,
	Dave Hansen <dave@linux.vnet.ibm.com>, linux-mm@kvack.org,
	Avi Kivity <avi@redhat.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	Robin Holt <holt@sgi.com>
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On Wed, Sep 29, 2010 at 14:37, Greg KH <greg@kroah.com> wrote:
> On Wed, Sep 29, 2010 at 10:32:34AM +0200, Avi Kivity wrote:
>> =C2=A0On 09/29/2010 04:50 AM, Greg KH wrote:
>>> >
>>> > =C2=A0Because the old ABI creates 129,000+ entries inside
>>> > =C2=A0/sys/devices/system/memory with their associated links from
>>> > =C2=A0/sys/devices/system/node/node*/ back to those directory entries=
.
>>> >
>>> > =C2=A0Thankfully things like rpm, hald, and other miscellaneous comma=
nds scan
>>> > =C2=A0that information.
>>>
>>> Really? =C2=A0Why? =C2=A0Why would rpm care about this? =C2=A0hald is d=
ead now so we
>>> don't need to worry about that anymore,
>>
>> That's not what compatiblity means. =C2=A0We can't just support
>> latest-and-greatest userspace on latest-and-greatest kernels.
>
> Oh, I know that, that's not what I was getting at at all here, sorry if
> it came across that way.
>
> I wanted to know so we could go fix programs that are mucking around in
> these files, as odds are, the shouldn't be doing that in the first
> place.
>
> Like rpm, why would it matter what the memory in the system looks like?

HAL does many inefficient things, but I don't think it's using
/sys/system/, besides that it may check the cpufreq govenors state
there.

Kay