linux-kernel - Re: [PATCH] memory hotadd fixes [4/5] avoid check in acpi

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Message-Id: <1154665534.5925.98.camel@keithlap>
Date:	Thu, 03 Aug 2006 21:25:34 -0700
From:	keith mannthey <kmannth@...ibm.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	lhms-devel <lhms-devel@...ts.sourceforge.net>,
	y-goto@...fujitsu.com, andrew <akpm@...l.org>
Subject: Re: [PATCH] memory hotadd fixes [4/5] avoid check in acpi

On Fri, 2006-08-04 at 12:48 +0900, KAMEZAWA Hiroyuki wrote:
> On Thu, 03 Aug 2006 20:23:46 -0700
> keith mannthey <kmannth@...ibm.com> wrote:

> > > > What keeps 0xa0000000 to 0xa1000000 from being re-onlined by a bad call
> > > > to add_memory?
> > > 
> > > Usual sparsemem's add_memory() checks whether there are sections in
> > > sparse_add_one_section(). then add_pages() returns -EEXIST (nothing to do).
> > > And ioresouce collision check will finally find collision because 0-0xbffffff
> > > resource will conflict with 0xa0000000 to 0xa10000000 area.
> > > But, x86_64 's (not sparsemem) add_pages() doen't do collision check, so it panics.
> > 
> > I have paniced with your 5 patches while doing SPARSMEM....  I think
> > your 6th patch address the issues I was seeing.  
> > 


with the 6 patches things work as expected.  It is nice to have the
sysfs devices online the correct amount of memory.  

I was broken without this patch because invalid add_memory calls are
made on by box (yet another issue) during boot. 

I will build my patch set on top of your 6 patches. 

Thanks,
  Keith 

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