linux-kernel - Re: [PATCH] mm: show node to memory section relationship with symlinks in sysfs

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Message-ID: <20080930232932.GB7123@us.ibm.com>
Date:	Tue, 30 Sep 2008 16:29:32 -0700
From:	Gary Hade <garyhade@...ibm.com>
To:	Yasunori Goto <y-goto@...fujitsu.com>
Cc:	Gary Hade <garyhade@...ibm.com>, linux-mm@...ck.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Badari Pulavarty <pbadari@...ibm.com>,
	Mel Gorman <mel@....ul.ie>, Chris McDermott <lcm@...ibm.com>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Greg KH <greg@...ah.com>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Nish Aravamudan <nish.aravamudan@...il.com>
Subject: Re: [PATCH] mm: show node to memory section relationship with
	symlinks in sysfs

On Tue, Sep 30, 2008 at 05:06:08PM +0900, Yasunori Goto wrote:
> 
> > +#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
> > +int register_mem_sect_under_node(struct memory_block *mem_blk)
>         :
> 
> I think this patch is convenience even when memory hotplug is disabled.
> CONFIG_SPARSEMEM seems better than CONFIG_MEMORY_HOTPLUG_SPARSE.

Yes, this would be nice but unfortunately the presence of the
memory section directories that are referenced by the symlinks
also depend on CONFIG_MEMORY_HOTPLUG_SPARSE being enabled.  Removal
of the memory hotplug dependency for the code in drivers/base/memory.c
will require more than a simple CONFIG_MEMORY_HOTPLUG_SPARSE to
CONFIG_SPARSEMEM dependency change.  I am still looking at this.

Thanks for the review and testing.

Gary

-- 
Gary Hade
System x Enablement
IBM Linux Technology Center
503-578-4503  IBM T/L: 775-4503
garyhade@...ibm.com
http://www.ibm.com/linux/ltc
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