linux-kernel - Re: [PATCH] drivers: base: new memory config sysfs driver for large memory systems

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Message-ID: <20130802155026.GA4550@variantweb.net>
Date:	Fri, 2 Aug 2013 10:50:26 -0500
From:	Seth Jennings <sjenning@...ux.vnet.ibm.com>
To:	Dave Hansen <dave.hansen@...ux.intel.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Nathan Fontenot <nfont@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Nivedita Singhvi <niv@...ibm.com>,
	Michael J Wolf <mjwolf@...ibm.com>,
	linux-kernel@...r.kernel.org, Linux-MM <linux-mm@...ck.org>
Subject: Re: [PATCH] drivers: base: new memory config sysfs driver for large
 memory systems

On Thu, Aug 01, 2013 at 03:13:03PM -0700, Dave Hansen wrote:
> On 08/01/2013 01:57 PM, Greg Kroah-Hartman wrote:
> >> > "memory" is the name used by the current sysfs memory layout code in
> >> > drivers/base/memory.c. So it can't be the same unless we are going to
> >> > create a toggle a boot time to select between the models, which is
> >> > something I am looking to add if this code/design is acceptable to
> >> > people.
> > I know it can't be the same, but this is like "memory_v2" or something,
> > right?  I suggest you make it an either/or option, given that you feel
> > the existing layout just will not work properly for you.
> 
> If there are existing tools or applications that look for memory hotplug
> events, how does this interact with those?  I know you guys have control
> over the ppc software that actually performs the probe/online
> operations, but what about other apps?

After taking a closer look, I've decided to rework this to preserve more
of the existing layout.  Should be posting it next Monday.

> 
> I also don't seem to see the original post to LKML.  Did you send
> privately to Greg, then he cc'd LKML on his reply?

Yeah :-/  My mail relay settings were messed up and my system tried to
deliver the mail directly to recipients; some of which worked and some
failed (spam/firewall filters, etc).  Sigh...

Seth

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