linux-kernel - Re: [PATCH v2 2/3] sysfs cpu probe/release files

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Message-ID: <19213.61204.591278.856459@drongo.ozlabs.ibm.com>
Date:	Thu, 26 Nov 2009 13:59:32 +1100
From:	Paul Mackerras <paulus@...ba.org>
To:	Nathan Fontenot <nfont@...tin.ibm.com>
Cc:	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org,
	gregkh@...e.de, Ben Herrenschmidt <benh@...nel.crashing.org>
Subject: Re: [PATCH v2 2/3] sysfs cpu probe/release files

Nathan Fontenot writes:

> In order to support kernel DLPAR of CPU resources we need to provide an
> interface to add (probe) and remove (release) the resource from the system.
> This patch Creates new generic probe and release sysfs files to facilitate
> cpu probe/release.  The probe/release interface provides for allowing each
> arch to supply their own routines for implementing the backend of adding
> and removing cpus to/from the system.
> 
> This also creates the powerpc specific stubs to handle the arch callouts 
> from writes to the sysfs files.
> 
> The creation and use of these files is regulated by the 
> CONFIG_ARCH_CPU_PROBE_RELEASE option so that only architectures that need the
> capability will have the files created.
> 
> Signed-off-by: Nathan Fontenot <nfont@...tin.ibm.com>

Acked-by: Paul Mackerras <paulus@...ba.org>
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