linux-kernel - Re: [PATCH 1/2] acpi hotplug cleanups, move install notifier to add function

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Date:	Wed, 30 Aug 2006 14:48:26 -0700
From:	keith mannthey <kmannth@...ibm.com>
To:	mail@...ninger.de
Cc:	Yasunori Goto <y-goto@...fujitsu.com>, trenn@...e.de,
	andrew <akpm@...l.org>, "Brown, Len" <len.brown@...el.com>,
	ACPI-ML <linux-acpi@...r.kernel.org>,
	Linux Kernel ML <linux-kernel@...r.kernel.org>,
	Linux Hotplug Memory Support 
	<lhms-devel@...ts.sourceforge.net>, naveen.b.s@...el.com
Subject: Re: [PATCH 1/2] acpi hotplug cleanups, move install notifier to
	add function

On Sun, 2006-08-27 at 19:19 +0200, Thomas Renninger wrote:
> On Fri, 2006-08-25 at 20:59 +0900, Yasunori Goto wrote:
> > > I sent a patch a while ago that gets rid of the whole namespace walking
> > > by making acpi_memoryhotplug an acpi device and making use of the .add
> > > callback function and the acpi_bus_register_driver call.
> > > 
> > > I am not sure whether this is possible if you have multiple memory
> > > devices, though (if not maybe it should be made possible?)...
> > > 
> > > Yasunori even tested the patch and sent an Ok:
> > > http://marc.theaimsgroup.com/?t=114065312400001&r=1&w=2
> > > 
> > > If this is acceptable I can rebase the patch on a current kernel.
> > 
> > Hi. Thomas-san.
> > Did you rebase your patch?
> > 
> > I'm trying to do it now too. 
> > But, current code (2.6.18-rc4) seems to register handler for
> > only enable status devices at boot time.
> > So, notification is -discarded- due to no handler for new memory
> > device when hot-add event occurs. Hmmm. :-(
> 
> Trying again with a real mailer, sorry about the previous junk ...
> The email address of the module author (naveen.b.s@...el.com) seems to
> be invalid?
> 
>     Thomas

Sorry for taking so long to test this out.  I just hooked it up with
2.6.18-rc4-mm3 (I built with CONFIG_ACPI_HOTPLUG_MEMORY=y) and I get

ACPI Exception (acpi_bus-0071): AE_NOT_FOUND, No context for object
[ffff81107357a5d0] [20060707]

when I do a hot-add. It might be a day or two before I can sort out what
is going on but I think Yasunori's mail may be getting at the issue. (My
device is only presented to the OS at add time.)

Thanks,
  Keith 



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