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Date: Fri, 26 Feb 2010 16:01:08 -0800 (PST)
From: David Rientjes <rientjes@google.com>
To: Christoph Lameter <cl@linux-foundation.org>
cc: Andi Kleen <andi@firstfloor.org>, Pekka Enberg <penberg@cs.helsinki.fi>,
       Nick Piggin <npiggin@suse.de>, linux-kernel@vger.kernel.org,
       linux-mm@kvack.org, haicheng.li@intel.com,
       KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [PATCH] [4/4] SLAB: Fix node add timer race in cache_reap
In-Reply-To: <alpine.DEB.2.00.1002261123520.7719@router.home>
Message-ID: <alpine.DEB.2.00.1002261555030.32111@chino.kir.corp.google.com>
References: <20100215105253.GE21783@one.firstfloor.org> <20100215110135.GN5723@laptop> <alpine.DEB.2.00.1002191222320.26567@router.home> <20100220090154.GB11287@basil.fritz.box> <alpine.DEB.2.00.1002240949140.26771@router.home> <4B862623.5090608@cs.helsinki.fi>
 <alpine.DEB.2.00.1002242357450.26099@chino.kir.corp.google.com> <alpine.DEB.2.00.1002251228140.18861@router.home> <20100226114136.GA16335@basil.fritz.box> <alpine.DEB.2.00.1002260904311.6641@router.home> <20100226155755.GE16335@basil.fritz.box>
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On Fri, 26 Feb 2010, Christoph Lameter wrote:

> > 1) numa memory hotadd never worked
> 
> Well Kamesan indicated that this worked if a cpu became online.
> 

That may be true, but it doesn't address hotpluggable 
ACPI_SRAT_MEM_HOT_PLUGGABLE entries for CONFIG_MEMORY_HOTPLUG_SPARSE where 
no cpus are being onlined or writing to /sys/devices/system/memory/probe 
for CONFIG_ARCH_MEMORY_PROBE.

> > 2) the rest just bitrotted because nobody tested it.
> 
> Yep. David: Can you revise the relevant portions of the patchset and
> repost it?
> 

Ok.
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